RFC 846 UNKNOWN TCP · SURVEYS · ARPANET
Who talks TCP? - survey of 22 February 1983
An early snapshot of TCP adoption across ARPANET hosts
RFC EDITOR
Smallberg, D., "Who talks TCP? - survey of 22 February 1983", RFC 846, DOI 10.17487/RFC0846, February 1983, <https://www.rfc-editor.org/info/rfc846>.
BIBTEX
@misc{rfc846,
series = {Request for Comments},
number = 846,
howpublished = {RFC 846},
publisher = {RFC Editor},
doi = {10.17487/RFC0846},
url = {https://www.rfc-editor.org/info/rfc846},
author = {D. Smallberg},
title = {{Who talks TCP? - survey of 22 February 1983}},
pagetotal = 14,
year = 1983,
month = feb,
} RFC text
Network Working Group D. Smallberg
Request for Comments: 846 February 1983
Who Talks TCP? -- Survey of 22 February 1983
The list of hosts was taken from the NIC hostname table of 18-Feb-83.
The tests were run on 22-Feb-83 from 8 am to ~8:05 pm PST from
ISI-VAXA.ARPA.
Dead, refused, and unreachable hosts were retried from 10 am 23-Feb-83
to ~6:40 pm PST.
Claims are taken from the NIC host table:
T = tcp (no particular services mentioned)
t = tcp/telnet
f = tcp/ftp
s = tcp/smtp
Results for each service:
blank (not accepted)
refused
unreachable
dead
accepted
accepted+ (FTP allowed user anonymous, password guest)
Summary information:
Telnet Result
no telnet unreachable refused dead accepted
+-----------+-------------+---------+------+------------+
C tcp/telnet | 16 | 4 | 4 | 29 | 181 | 234
l +-----------+-------------+---------+------+------------+
a tcp | 4 | 1 | 0 | 3 | 2 | 10
i +-----------+-------------+---------+------+------------+
m Nothing | 41 | 2 | 0 | 31 | 7 | 81
+-----------+-------------+---------+------+------------+----
61 7 4 63 190 | 325
FTP Result
accepted or
no tcp/ftp unreachable refused dead accepted+
+-----------+-------------+---------+------+------------+
C tcp/ftp | 13 | 4 | 4 | 27 | 173 | 221
l +-----------+-------------+---------+------+------------+
a tcp | 4 | 1 | 0 | 3 | 2 | 10
i +-----------+-------------+---------+------+------------+
m Nothing | 50 | 2 | 3 | 33 | 6 | 94
+-----------+-------------+---------+------+------------+----
67 7 7 63 181 | 325
SMTP Result
no tcp/smtp unreachable refused dead accepted
+-----------+-------------+---------+------+------------+
C tcp/smtp | 18 | 4 | 4 | 26 | 157 | 209
l +-----------+-------------+---------+------+------------+
a tcp | 4 | 1 | 0 | 3 | 2 | 10
i +-----------+-------------+---------+------+------------+
m Nothing | 47 | 2 | 4 | 34 | 19 | 106
+-----------+-------------+---------+------+------------+----
69 7 8 63 178 | 325
Results in alphabetical order:
Name Address Claims Telnet FTP SMTP
---- ------- ------ ------ --- ----
acc 10.2.0.54 ---- d e a d
ada-vax 10.0.0.52 -tfs accepted accepted accepted
aerospace 10.2.0.65 -tfs accepted accepted accepted
afgl 10.1.0.66 -tf- d e a d
afsc-ad 10.0.0.53 -tf- d e a d
afsc-dev 10.2.0.53 -tf- accepted accepted
afsc-hq 10.0.0.67 ----
afsc-sd 10.0.0.65 ----
afwl 10.0.0.48 -tf- accepted accepted
aids-unix 10.2.0.56 -tfs d e a d
alta-coma 3.1.0.50 T---
ames-tss 10.0.0.16 -tfs accepted accepted accepted
ames-vmsb 10.3.0.16 ---- accepted accepted accepted
anl 10.0.0.55 ----
anl-mcs 10.1.0.55 -tfs accepted accepted accepted
apg-1 10.1.0.29 -tfs accepted accepted accepted
arpa-dms 10.0.0.28 ---- d e a d
arpa-png11 10.3.0.28 -tfs
bbn-admin 3.1.0.6 -tfs accepted accepted accepted
bbn-cd 3.3.0.9 -tfs accepted accepted accepted
bbn-clxx 10.4.0.49 -tfs accepted accepted accepted
bbn-cvax 128.11.0.2 -tfs accepted accepted accepted
bbn-inoc 10.2.0.82 -tfs
bbn-inoc 3.2.0.6 -tfs accepted accepted accepted
bbn-noc 3.1.0.14 -tfs accepted accepted accepted
bbn-noc2 10.6.0.82 -tfs accepted accepted accepted
bbn-nu 10.0.0.72 -tfs
bbn-rsm 10.4.0.82 -t-- d e a d
bbn-tenexb 10.0.0.49 -tfs accepted accepted+ accepted
bbn-tenexc 10.3.0.49 -tfs accepted accepted accepted
bbn-unix 10.1.0.72 -tfs accepted accepted accepted
bbn-vax 10.1.0.82 -tfs accepted accepted accepted
bbna 10.3.0.5 -tfs accepted accepted accepted
bbncca 3.0.0.2 -tfs accepted accepted accepted
bbnccb 3.1.0.2 -tfs accepted accepted accepted
bbnccc 3.2.0.2 -tfs accepted accepted accepted
bbnccf 3.0.0.4 -tfs accepted accepted accepted
bbnccd 3.3.0.2 -tfs accepted accepted accepted
bbncci 3.3.0.4 -tfs accepted accepted accepted
bbnf 10.0.0.5 -tfs accepted accepted accepted
bbng 10.1.0.5 -tfs accepted accepted accepted
bbnp 3.2.0.4 -tfs accepted accepted accepted
bbnq 3.2.0.7 -tfs accepted accepted accepted
bbns 3.0.0.7 -tfs accepted accepted accepted
bbnt 10.0.0.82 -tfs accepted accepted accepted
bbnw 3.3.0.6 -tfs accepted accepted accepted
bbnx 3.0.0.8 -tfs accepted accepted accepted
bbny 3.2.0.8 -tfs accepted accepted accepted
bbnz 3.1.0.7 -tfs accepted accepted accepted
bnl 10.1.0.58 ---- accepted accepted accepted
bragg-sta1 10.1.0.38 -tfs
brl 10.0.0.29 -tfs accepted accepted accepted
brl-bmd 10.3.0.29 -tfs accepted accepted accepted
brl-secad-vg 192.5.21.3 ----
brl-vld 192.5.21.2 -tfs accepted accepted refused
brl-vld-gr 192.5.21.5 -tfs
brl-vld-vg 192.5.21.4 ----
cca-unix 10.0.0.31 -tfs accepted accepted+ accepted
cca-vms 10.1.0.31 -tfs accepted accepted accepted
cctc 10.0.0.20 -t--
cincpacflt-wm 10.1.0.36 ----
cit-20 10.0.0.54 -tfs accepted accepted accepted
cit-750 192.5.7.3 -tfs accepted accepted accepted
cit-vax 10.1.0.54 -tfs accepted accepted accepted
clarksburg-expak 8.0.0.4 ---- u n r e a c h a b l e
clarksburg-monitor 8.0.0.44 ---- u n r e a c h a b l e
cmu 128.2.254.255 ---- d e a d
cmu-cs-a 10.1.0.14 -tfs accepted accepted accepted
cmu-cs-b 10.0.0.14 ---- d e a d
cmu-cs-c 10.3.0.14 -tfs accepted accepted+ accepted
cmu-cs-cad 128.2.254.133 -tfs accepted accepted accepted
cmu-cs-g 128.2.254.132 -tfs accepted accepted accepted
cmu-cs-gandalf 128.2.254.140 -tfs accepted accepted accepted
cmu-cs-ius 128.2.254.128 -tfs accepted accepted accepted
cmu-cs-j 128.2.254.144 -tfs d e a d
cmu-cs-jk 128.2.254.154 ---- d e a d
cmu-cs-k 128.2.254.136 -tfs d e a d
cmu-cs-ps 128.2.254.130 ---- d e a d
cmu-cs-pt 128.2.254.155 -tfs accepted accepted accepted
cmu-cs-speech 128.2.254.145 -tfs accepted accepted accepted
cmu-cs-spice 128.2.254.139 -tfs accepted accepted accepted
cmu-cs-unh 128.2.254.150 -tfs accepted accepted accepted
cmu-cs-vlsi 128.2.254.129 -tfs accepted accepted accepted
cmu-cs-zog 128.2.254.131 -tfs accepted accepted accepted
cmu-ri-arm 128.2.254.151 -tfs accepted accepted accepted
cmu-ri-fas 128.2.254.138 -tfs accepted accepted accepted
cmu-ri-isl 128.2.254.143 -tfs accepted accepted accepted
cmu-ri-isl2 128.2.254.152 -tfs accepted accepted accepted
cmu-ri-leg 128.2.254.141 -tfs d e a d
coins-gateway 10.1.0.57 ----
coins-tas 10.0.0.36 ----
collins-gw 10.1.0.46 T---
collins-pr 10.0.0.46 T--- d e a d
compion 10.1.0.12 -t-- accepted refused refused
compion-vms 10.0.0.12 -tfs accepted accepted accepted
cornell 10.3.0.96 -tfs accepted accepted accepted
csnet-cic 3.0.0.14 -tfs accepted accepted accepted
csnet-purdue 128.10.0.2 -tfs accepted accepted accepted
csnet-sh 10.1.0.94 -tfs accepted accepted+ accepted
csnet-sh 192.5.2.3 T--- accepted accepted+ accepted
dca-ems 10.4.0.20 -tfs accepted accepted accepted
dcec-psat 10.5.0.20 T---
dcn1 128.4.0.1 -tfs accepted accepted+ accepted
dcn2 128.4.0.2 -tfs
dcn3 128.4.0.3 -tfs accepted accepted+ accepted
dcn4 128.4.0.4 -tfs d e a d
dcn5 128.4.0.5 -tfs accepted accepted+ accepted
dcn6 128.4.0.6 -tfs accepted accepted+ accepted
dcn7 128.4.0.7 -tfs d e a d
dcn8 128.4.0.8 -tfs d e a d
dcn9 128.4.0.9 -tfs d e a d
dec-2136 10.0.0.79 -tfs d e a d
dec-marlboro 10.1.0.79 -tfs accepted accepted accepted
dfvlr1 128.7.0.1 -tfs u n r e a c h a b l e
dfvlr2 128.7.0.2 -tfs u n r e a c h a b l e
dfvlr3 128.7.0.3 -tfs u n r e a c h a b l e
dfvlr7 128.7.0.7 -tfs u n r e a c h a b l e
dtnsrdc 10.0.0.81 -tfs accepted accepted accepted
edn-host1 21.1.0.1 -tfs d e a d
edn-unix 10.3.0.20 -tfs accepted accepted
etam-expak 4.0.0.1 ----
etam-monitor 4.0.0.41 ----
fnoc 10.1.0.33 ---- d e a d
fnoc-secure 10.3.0.33 ----
ford-ecc 128.5.0.11 -tfs
ford-eed 128.5.0.14 -tfs accepted accepted+ accepted
ford-ers 128.5.0.13 -tfs accepted accepted+ accepted
ford-foe 128.5.0.15 -tfs d e a d
ford-lab 128.5.0.8 -tfs accepted accepted+ accepted
ford-res 128.5.0.10 -tfs d e a d
ford-srl 128.5.0.12 -tfs d e a d
ford-vax 128.5.0.9 -tfs d e a d
ford-wdl1 128.5.32.1 -tfs accepted accepted accepted
ford-wdl2 128.5.32.2 -tfs d e a d
ford-wdl3 128.5.32.3 -tfs d e a d
ford-wdl4 128.5.32.4 -tfs d e a d
ford-wdl5 128.5.32.5 -tfs d e a d
ford-wdl6 128.5.32.6 -t-- accepted accepted accepted
ford1 128.5.0.1 -tfs accepted accepted+ accepted
ford2 128.5.0.2 -tfs accepted accepted+ accepted
ford3 128.5.0.3 -tfs accepted accepted+ accepted
ford4 128.5.0.4 -tfs accepted accepted+ accepted
fucino 4.0.0.88 ----
fucino-expak 4.0.0.95 ----
fucino-monitor 4.0.0.94 ----
goonhilly-expak 4.0.0.2 ----
goonhilly-monitor 4.0.0.42 ----
gunter-adam 10.1.0.13 -tfs accepted accepted+ accepted
gunter-unix 10.0.0.13 ---- d e a d
harv-10 10.0.0.9 ----
hi-multics 10.0.0.80 -t-s accepted accepted accepted
isi-png11 10.1.0.27 ----
isi-vaxa 10.2.0.27 -tfs accepted accepted accepted
jpl-vax 10.3.0.54 -tfs accepted accepted+ accepted
kestrel 10.3.0.32 -tfs accepted accepted accepted
lanl-unix 10.0.0.90 -tfs accepted accepted accepted
lbl-csam 10.1.0.34 -tfs accepted accepted+ refused
ll 10.0.0.10 -tfs accepted accepted accepted
ll-11 10.3.0.10 ----
ll-en 10.4.0.10 -tfs accepted accepted accepted
ll-vlsi 10.1.0.10 -tfs accepted accepted accepted
ll-xn 10.2.0.10 ---- d e a d
lll-mfe 10.1.0.21 -tfs accepted accepted
lll-unix 10.0.0.21 -tfs d e a d
logicon 10.2.0.3 ---- d e a d
martin 10.5.0.53 ----
martin-b 10.1.0.64 -tfs accepted accepted accepted
mcclellan 10.3.0.78 ---- accepted
mit-ai 10.2.0.6 -tfs accepted accepted+ accepted
mit-ajax 18.10.0.64 -tf- accepted accepted accepted
mit-cls 18.10.0.76 -tfs accepted accepted accepted
mit-csr 18.10.0.8 ---s accepted accepted
mit-devmultics 10.1.0.77 -t-s d e a d
mit-dms 10.1.0.6 -tfs accepted accepted+ accepted
mit-mc 10.3.0.44 -tfs accepted accepted+ accepted
mit-ml 10.3.0.6 -tfs accepted accepted+ accepted
mit-multics 10.0.0.6 -tfs accepted accepted accepted
mit-tstgw 10.2.0.44 T--- d e a d
mit-xx 10.0.0.44 -tfs accepted accepted+ accepted
mitre 10.0.0.17 -tfs accepted accepted accepted
mitre-bedford 10.0.0.66 ----
nadc 10.0.0.24 -tfs accepted accepted accepted
nadc-ncp 10.2.0.24 ---- d e a d
nalcon 10.1.0.81 -tfs accepted accepted accepted
nbs-pl 10.3.0.19 ---- d e a d
nbs-sdc 10.1.0.19 -tfs accepted accepted+ accepted
nbs-unix 10.2.0.19 ---- d e a d
nbs-vms 10.0.0.19 -tfs accepted accepted accepted
ncsc 10.4.0.53 ---- d e a d
ndre1 48.3.1.41 -tfs accepted accepted+ accepted
nlm-mcs 10.0.0.88 -tfs accepted accepted accepted
nosc-cc 10.0.0.3 -tfs accepted accepted accepted
nosc-sdl 10.1.0.35 ----
nosc-secure2 10.0.0.35 ----
nosc-secure3 10.3.0.35 ----
nosc-spel 10.1.0.3 ---- d e a d
nprdc 10.3.0.3 -tfs accepted accepted accepted
nps 10.0.0.33 T---
nrl 10.0.0.8 -tf- accepted accepted accepted
nrl-aic 10.1.0.8 -tfs accepted accepted accepted
nrl-arctan 10.6.0.8 ---- d e a d
nrl-css 10.7.0.8 -tfs accepted accepted accepted
nrl-tops10 10.3.0.8 ---- d e a d
nsrdcoa 10.3.0.81 -tfs accepted accepted accepted
nswc-dl 10.0.0.84 -tf- accepted accepted
nswc-g 10.1.0.84 T--- accepted accepted accepted
nswc-wo 10.2.0.8 -tfs accepted accepted accepted
nusc 10.3.0.92 ---- accepted accepted accepted
nusc-npt 10.2.0.92 ----
nwc-387a 10.0.0.85 -tfs d e a d
nwc-387b 10.3.0.85 -tfs accepted accepted accepted
nyu 10.0.0.58 -tfs accepted accepted accepted
office-1 10.0.0.43 ---s
office-10 10.1.0.93 -tfs
office-12 10.2.0.93 ---s d e a d
office-2 10.1.0.43 ---s
office-3 10.2.0.43 ---s accepted refused accepted
office-7 10.3.0.43 -t-s
office-8 10.0.0.93 -t-s
okc-unix 10.3.0.46 -t-- accepted
parc-maxc 10.0.0.32 -tfs accepted accepted+ accepted
purdue 10.0.0.37 -tfs accepted accepted accepted
purdue-tn 14.0.0.1 -tfs
radc-multics 10.0.0.18 -tfs accepted accepted accepted
radc-tops20 10.3.0.18 -tfs accepted accepted+ accepted
radc-unix 10.5.0.18 ---- d e a d
raisting 4.0.0.72 ----
raisting-expak 4.0.0.79 ----
raisting-monitor 4.0.0.78 ----
rand-relay 10.1.0.7 -tfs accepted accepted accepted
rand-tn 14.0.0.3 -tfs
rand-unix 10.3.0.7 -tfs accepted accepted accepted
robins-unix 10.3.0.64 ---- d e a d
rochester 10.4.0.18 ---- d e a d
rutgers 10.2.0.58 -tfs accepted accepted+ accepted
s1-a 10.1.0.95 ----
s1-b 10.2.0.95 -tfs d e a d
s1-c 10.3.0.95 -tfs accepted accepted accepted
s1-gateway 10.0.0.95 ----
sandia 10.0.0.87 -tfs d e a d
satnet 4.0.0.0 ----
satnet-sink 4.0.0.37 ----
seismo 10.0.0.25 -tfs accepted accepted accepted
sri-ai 10.2.0.73 -tfs accepted accepted+ accepted
sri-csl 10.2.0.2 -tfs accepted accepted+ accepted
sri-iu 10.3.0.73 -tfs accepted accepted+ accepted
sri-kl 10.1.0.2 -tfs accepted accepted+ accepted
sri-nic 10.0.0.73 -t-s accepted accepted+ accepted
sri-nsc11 10.0.0.2 ----
sri-prmh 10.3.2.51 T--- d e a d
sri-sta2 10.3.1.51 ---- d e a d
sri-sta6 10.1.1.51 ----
sri-tsc 10.3.0.2 -tfs accepted accepted+ accepted
sri-unix 10.2.0.51 -tfs accepted accepted+ accepted
sri-warf 10.1.0.73 ----
srijoyce 10.1.4.51 -tf- accepted accepted accepted
st-nic 10.0.0.51 -t-- d e a d
su-ai 10.0.0.11 -tfs
su-dsn 10.1.0.56 -tfs refused refused accepted
su-score 10.3.0.11 -tfs accepted accepted+ accepted
sumex-aim 10.0.0.56 -tfs accepted accepted+ accepted
tanum-expak 4.0.0.3 ----
tanum-monitor 4.0.0.43 ----
tycho 10.0.0.57 -t--
ucb-arpa 10.0.0.78 -tfs accepted accepted+ accepted
ucb-vax 10.2.0.78 -tfs accepted accepted+ accepted
ucbarpa 46.0.0.4 -tf- accepted accepted+ accepted
ucbcad 46.0.0.5 -tf- accepted accepted accepted
ucbcalder 46.0.0.12 -tf- accepted accepted accepted
ucbdali 46.0.0.13 -tf- refused refused accepted
ucbernie 46.0.0.6 -tf- accepted accepted accepted
ucbesvax 46.0.0.9 -tf- accepted accepted accepted
ucbingres 46.0.0.19 -tf- accepted accepted accepted
ucbkim 46.0.0.11 -tf- accepted accepted accepted
ucbmatisse 46.0.0.14 -tf- accepted accepted accepted
ucbmedea 46.0.0.15 -tf- accepted accepted accepted
ucbmonet 46.0.0.7 -tf- accepted accepted accepted
ucbvax 46.0.0.10 -tf- accepted accepted+ accepted
ucl-cs 11.3.1.42 -t-- accepted refused
ucl-ucl2 11.3.2.42 ---- accepted refused
ucl-ucl3 11.3.3.42 ---- d e a d
ucl-ucl4 11.3.4.42 ---- d e a d
ucl-ucl5 11.3.5.42 ---- d e a d
ucl-ucl6 11.3.6.42 ---- d e a d
ucl-ucl7 11.3.7.42 ---- d e a d
ucla-ats 10.3.0.1 -tfs accepted accepted accepted
ucla-ccn 10.1.0.1 -tfs accepted refused refused
ucla-security 10.2.0.1 -tfs accepted accepted accepted
udel-ee 10.2.0.96 -tfs accepted accepted accepted
udel-relay 10.0.0.96 -tfs accepted accepted accepted
udel-tcp 10.1.0.96 ----
udel-tn 14.0.0.4 -tfs
umd1 128.8.0.1 -tfs accepted accepted+ accepted
umd2 128.8.0.2 -t-- refused refused refused
umd3 128.8.0.3 -tfs accepted accepted+ accepted
umd4 128.8.0.4 -tfs d e a d
umd5 128.8.0.5 -tfs accepted accepted+ accepted
umd6 128.8.0.6 -tfs d e a d
umd7 128.8.0.7 -tfs refused refused refused
usc-ecl 10.3.0.23 -tfs accepted accepted+ accepted
usc-eclb 10.0.0.23 -tfs accepted accepted+ accepted
usc-eclc 10.1.0.23 -tfs accepted accepted+ accepted
usc-isi 10.1.0.22 -tfs accepted accepted+ accepted
usc-isib 10.3.0.52 -tfs accepted accepted+ accepted
usc-isic 10.2.0.22 T--- u n r e a c h a b l e
usc-isid 10.0.0.27 -tfs accepted accepted+ accepted
usc-isie 10.1.0.52 -tfs accepted accepted+ accepted
usc-isif 10.2.0.52 -tfs accepted accepted+ accepted
usgs1-amdahl 10.2.0.68 ----
usgs1-multics 10.0.0.68 -tfs accepted accepted accepted
usgs2-multics 10.0.0.69 -tfs accepted accepted accepted
usgs3-multics 10.0.0.70 -tfs accepted accepted accepted
utah-20 10.3.0.4 -tfs accepted accepted+ accepted
utah-cs 10.0.0.4 -tfs accepted accepted+ accepted
utexas-11 10.0.0.62 -tfs accepted accepted+ accepted
utexas-20 10.1.0.62 -tfs accepted accepted+ accepted
uw-vlsi 10.3.0.91 -tfs accepted accepted accepted
uwisc-tn 14.0.0.2 -tfs accepted accepted+ accepted
washington 10.0.0.91 -tfs accepted accepted+ accepted
wharton-10 10.3.0.24 --f- d e a d
wpafb 10.0.0.47 -tf- accepted accepted
wpafb-afwal 10.1.0.47 -tfs accepted accepted
yale 10.2.0.9 ---- d e a d
ypg 10.0.0.75 ---- d e a d
yuma 10.3.0.75 ---- d e a d
Results in host table order:
Name Address Claims Telnet FTP SMTP
---- ------- ------ ------ --- ----
ll 10.0.0.10 -tfs accepted accepted accepted
su-ai 10.0.0.11 -tfs
compion-vms 10.0.0.12 -tfs accepted accepted accepted
gunter-unix 10.0.0.13 ---- d e a d
cmu-cs-b 10.0.0.14 ---- d e a d
ames-tss 10.0.0.16 -tfs accepted accepted accepted
mitre 10.0.0.17 -tfs accepted accepted accepted
radc-multics 10.0.0.18 -tfs accepted accepted accepted
nbs-vms 10.0.0.19 -tfs accepted accepted accepted
sri-nsc11 10.0.0.2 ----
cctc 10.0.0.20 -t--
lll-unix 10.0.0.21 -tfs d e a d
usc-eclb 10.0.0.23 -tfs accepted accepted+ accepted
nadc 10.0.0.24 -tfs accepted accepted accepted
seismo 10.0.0.25 -tfs accepted accepted accepted
usc-isid 10.0.0.27 -tfs accepted accepted+ accepted
arpa-dms 10.0.0.28 ---- d e a d
brl 10.0.0.29 -tfs accepted accepted accepted
nosc-cc 10.0.0.3 -tfs accepted accepted accepted
cca-unix 10.0.0.31 -tfs accepted accepted+ accepted
parc-maxc 10.0.0.32 -tfs accepted accepted+ accepted
nps 10.0.0.33 T---
nosc-secure2 10.0.0.35 ----
coins-tas 10.0.0.36 ----
purdue 10.0.0.37 -tfs accepted accepted accepted
utah-cs 10.0.0.4 -tfs accepted accepted+ accepted
office-1 10.0.0.43 ---s
mit-xx 10.0.0.44 -tfs accepted accepted+ accepted
collins-pr 10.0.0.46 T--- d e a d
wpafb 10.0.0.47 -tf- accepted accepted
afwl 10.0.0.48 -tf- accepted accepted
bbn-tenexb 10.0.0.49 -tfs accepted accepted+ accepted
bbnf 10.0.0.5 -tfs accepted accepted accepted
st-nic 10.0.0.51 -t-- d e a d
ada-vax 10.0.0.52 -tfs accepted accepted accepted
afsc-ad 10.0.0.53 -tf- d e a d
cit-20 10.0.0.54 -tfs accepted accepted accepted
anl 10.0.0.55 ----
sumex-aim 10.0.0.56 -tfs accepted accepted+ accepted
tycho 10.0.0.57 -t--
nyu 10.0.0.58 -tfs accepted accepted accepted
mit-multics 10.0.0.6 -tfs accepted accepted accepted
utexas-11 10.0.0.62 -tfs accepted accepted+ accepted
afsc-sd 10.0.0.65 ----
mitre-bedford 10.0.0.66 ----
afsc-hq 10.0.0.67 ----
usgs1-multics 10.0.0.68 -tfs accepted accepted accepted
usgs2-multics 10.0.0.69 -tfs accepted accepted accepted
usgs3-multics 10.0.0.70 -tfs accepted accepted accepted
bbn-nu 10.0.0.72 -tfs
sri-nic 10.0.0.73 -t-s accepted accepted+ accepted
ypg 10.0.0.75 ---- d e a d
ucb-arpa 10.0.0.78 -tfs accepted accepted+ accepted
dec-2136 10.0.0.79 -tfs d e a d
nrl 10.0.0.8 -tf- accepted accepted accepted
hi-multics 10.0.0.80 -t-s accepted accepted accepted
dtnsrdc 10.0.0.81 -tfs accepted accepted accepted
bbnt 10.0.0.82 -tfs accepted accepted accepted
nswc-dl 10.0.0.84 -tf- accepted accepted
nwc-387a 10.0.0.85 -tfs d e a d
sandia 10.0.0.87 -tfs d e a d
nlm-mcs 10.0.0.88 -tfs accepted accepted accepted
harv-10 10.0.0.9 ----
lanl-unix 10.0.0.90 -tfs accepted accepted accepted
washington 10.0.0.91 -tfs accepted accepted+ accepted
office-8 10.0.0.93 -t-s
s1-gateway 10.0.0.95 ----
udel-relay 10.0.0.96 -tfs accepted accepted accepted
ucla-ccn 10.1.0.1 -tfs accepted refused refused
ll-vlsi 10.1.0.10 -tfs accepted accepted accepted
compion 10.1.0.12 -t-- accepted refused refused
gunter-adam 10.1.0.13 -tfs accepted accepted+ accepted
cmu-cs-a 10.1.0.14 -tfs accepted accepted accepted
nbs-sdc 10.1.0.19 -tfs accepted accepted+ accepted
sri-kl 10.1.0.2 -tfs accepted accepted+ accepted
lll-mfe 10.1.0.21 -tfs accepted accepted
usc-isi 10.1.0.22 -tfs accepted accepted+ accepted
usc-eclc 10.1.0.23 -tfs accepted accepted+ accepted
isi-png11 10.1.0.27 ----
apg-1 10.1.0.29 -tfs accepted accepted accepted
nosc-spel 10.1.0.3 ---- d e a d
cca-vms 10.1.0.31 -tfs accepted accepted accepted
fnoc 10.1.0.33 ---- d e a d
lbl-csam 10.1.0.34 -tfs accepted accepted+ refused
nosc-sdl 10.1.0.35 ----
cincpacflt-wm 10.1.0.36 ----
bragg-sta1 10.1.0.38 -tfs
office-2 10.1.0.43 ---s
collins-gw 10.1.0.46 T---
wpafb-afwal 10.1.0.47 -tfs accepted accepted
bbng 10.1.0.5 -tfs accepted accepted accepted
usc-isie 10.1.0.52 -tfs accepted accepted+ accepted
cit-vax 10.1.0.54 -tfs accepted accepted accepted
anl-mcs 10.1.0.55 -tfs accepted accepted accepted
su-dsn 10.1.0.56 -tfs refused refused accepted
coins-gateway 10.1.0.57 ----
bnl 10.1.0.58 ---- accepted accepted accepted
mit-dms 10.1.0.6 -tfs accepted accepted+ accepted
utexas-20 10.1.0.62 -tfs accepted accepted+ accepted
martin-b 10.1.0.64 -tfs accepted accepted accepted
afgl 10.1.0.66 -tf- d e a d
rand-relay 10.1.0.7 -tfs accepted accepted accepted
bbn-unix 10.1.0.72 -tfs accepted accepted accepted
sri-warf 10.1.0.73 ----
mit-devmultics 10.1.0.77 -t-s d e a d
dec-marlboro 10.1.0.79 -tfs accepted accepted accepted
nrl-aic 10.1.0.8 -tfs accepted accepted accepted
nalcon 10.1.0.81 -tfs accepted accepted accepted
bbn-vax 10.1.0.82 -tfs accepted accepted accepted
nswc-g 10.1.0.84 T--- accepted accepted accepted
office-10 10.1.0.93 -tfs
csnet-sh 10.1.0.94 -tfs accepted accepted+ accepted
s1-a 10.1.0.95 ----
udel-tcp 10.1.0.96 ----
sri-sta6 10.1.1.51 ----
srijoyce 10.1.4.51 -tf- accepted accepted accepted
ucla-security 10.2.0.1 -tfs accepted accepted accepted
ll-xn 10.2.0.10 ---- d e a d
nbs-unix 10.2.0.19 ---- d e a d
sri-csl 10.2.0.2 -tfs accepted accepted+ accepted
usc-isic 10.2.0.22 T--- u n r e a c h a b l e
nadc-ncp 10.2.0.24 ---- d e a d
isi-vaxa 10.2.0.27 -tfs accepted accepted accepted
logicon 10.2.0.3 ---- d e a d
office-3 10.2.0.43 ---s accepted refused accepted
mit-tstgw 10.2.0.44 T--- d e a d
sri-unix 10.2.0.51 -tfs accepted accepted+ accepted
usc-isif 10.2.0.52 -tfs accepted accepted+ accepted
afsc-dev 10.2.0.53 -tf- accepted accepted
acc 10.2.0.54 ---- d e a d
aids-unix 10.2.0.56 -tfs d e a d
rutgers 10.2.0.58 -tfs accepted accepted+ accepted
mit-ai 10.2.0.6 -tfs accepted accepted+ accepted
aerospace 10.2.0.65 -tfs accepted accepted accepted
usgs1-amdahl 10.2.0.68 ----
sri-ai 10.2.0.73 -tfs accepted accepted+ accepted
ucb-vax 10.2.0.78 -tfs accepted accepted+ accepted
nswc-wo 10.2.0.8 -tfs accepted accepted accepted
bbn-inoc 10.2.0.82 -tfs
yale 10.2.0.9 ---- d e a d
nusc-npt 10.2.0.92 ----
office-12 10.2.0.93 ---s d e a d
s1-b 10.2.0.95 -tfs d e a d
udel-ee 10.2.0.96 -tfs accepted accepted accepted
ucla-ats 10.3.0.1 -tfs accepted accepted accepted
ll-11 10.3.0.10 ----
su-score 10.3.0.11 -tfs accepted accepted+ accepted
cmu-cs-c 10.3.0.14 -tfs accepted accepted+ accepted
ames-vmsb 10.3.0.16 ---- accepted accepted accepted
radc-tops20 10.3.0.18 -tfs accepted accepted+ accepted
nbs-pl 10.3.0.19 ---- d e a d
sri-tsc 10.3.0.2 -tfs accepted accepted+ accepted
edn-unix 10.3.0.20 -tfs accepted accepted
usc-ecl 10.3.0.23 -tfs accepted accepted+ accepted
wharton-10 10.3.0.24 --f- d e a d
arpa-png11 10.3.0.28 -tfs
brl-bmd 10.3.0.29 -tfs accepted accepted accepted
nprdc 10.3.0.3 -tfs accepted accepted accepted
kestrel 10.3.0.32 -tfs accepted accepted accepted
fnoc-secure 10.3.0.33 ----
nosc-secure3 10.3.0.35 ----
utah-20 10.3.0.4 -tfs accepted accepted+ accepted
office-7 10.3.0.43 -t-s
mit-mc 10.3.0.44 -tfs accepted accepted+ accepted
okc-unix 10.3.0.46 -t-- accepted
bbn-tenexc 10.3.0.49 -tfs accepted accepted accepted
bbna 10.3.0.5 -tfs accepted accepted accepted
usc-isib 10.3.0.52 -tfs accepted accepted+ accepted
jpl-vax 10.3.0.54 -tfs accepted accepted+ accepted
mit-ml 10.3.0.6 -tfs accepted accepted+ accepted
robins-unix 10.3.0.64 ---- d e a d
rand-unix 10.3.0.7 -tfs accepted accepted accepted
sri-iu 10.3.0.73 -tfs accepted accepted+ accepted
yuma 10.3.0.75 ---- d e a d
mcclellan 10.3.0.78 ---- accepted
nrl-tops10 10.3.0.8 ---- d e a d
nsrdcoa 10.3.0.81 -tfs accepted accepted accepted
nwc-387b 10.3.0.85 -tfs accepted accepted accepted
uw-vlsi 10.3.0.91 -tfs accepted accepted accepted
nusc 10.3.0.92 ---- accepted accepted accepted
s1-c 10.3.0.95 -tfs accepted accepted accepted
cornell 10.3.0.96 -tfs accepted accepted accepted
sri-sta2 10.3.1.51 ---- d e a d
sri-prmh 10.3.2.51 T--- d e a d
ll-en 10.4.0.10 -tfs accepted accepted accepted
rochester 10.4.0.18 ---- d e a d
dca-ems 10.4.0.20 -tfs accepted accepted accepted
bbn-clxx 10.4.0.49 -tfs accepted accepted accepted
ncsc 10.4.0.53 ---- d e a d
bbn-rsm 10.4.0.82 -t-- d e a d
radc-unix 10.5.0.18 ---- d e a d
dcec-psat 10.5.0.20 T---
martin 10.5.0.53 ----
nrl-arctan 10.6.0.8 ---- d e a d
bbn-noc2 10.6.0.82 -tfs accepted accepted accepted
nrl-css 10.7.0.8 -tfs accepted accepted accepted
ucl-cs 11.3.1.42 -t-- accepted refused
ucl-ucl2 11.3.2.42 ---- accepted refused
ucl-ucl3 11.3.3.42 ---- d e a d
ucl-ucl4 11.3.4.42 ---- d e a d
ucl-ucl5 11.3.5.42 ---- d e a d
ucl-ucl6 11.3.6.42 ---- d e a d
ucl-ucl7 11.3.7.42 ---- d e a d
csnet-purdue 128.10.0.2 -tfs accepted accepted accepted
cmu-cs-ius 128.2.254.128 -tfs accepted accepted accepted
cmu-cs-vlsi 128.2.254.129 -tfs accepted accepted accepted
cmu-cs-ps 128.2.254.130 ---- d e a d
cmu-cs-zog 128.2.254.131 -tfs accepted accepted accepted
cmu-cs-g 128.2.254.132 -tfs accepted accepted accepted
cmu-cs-cad 128.2.254.133 -tfs accepted accepted accepted
cmu-cs-k 128.2.254.136 -tfs d e a d
cmu-ri-fas 128.2.254.138 -tfs accepted accepted accepted
cmu-cs-spice 128.2.254.139 -tfs accepted accepted accepted
cmu-cs-gandalf 128.2.254.140 -tfs accepted accepted accepted
cmu-ri-leg 128.2.254.141 -tfs d e a d
cmu-ri-isl 128.2.254.143 -tfs accepted accepted accepted
cmu-cs-j 128.2.254.144 -tfs d e a d
cmu-cs-speech 128.2.254.145 -tfs accepted accepted accepted
cmu-cs-unh 128.2.254.150 -tfs accepted accepted accepted
cmu-ri-arm 128.2.254.151 -tfs accepted accepted accepted
cmu-ri-isl2 128.2.254.152 -tfs accepted accepted accepted
cmu-cs-jk 128.2.254.154 ---- d e a d
cmu-cs-pt 128.2.254.155 -tfs accepted accepted accepted
cmu 128.2.254.255 ---- d e a d
dcn1 128.4.0.1 -tfs accepted accepted+ accepted
dcn2 128.4.0.2 -tfs
dcn3 128.4.0.3 -tfs accepted accepted+ accepted
dcn4 128.4.0.4 -tfs d e a d
dcn5 128.4.0.5 -tfs accepted accepted+ accepted
dcn6 128.4.0.6 -tfs accepted accepted+ accepted
dcn7 128.4.0.7 -tfs d e a d
dcn8 128.4.0.8 -tfs d e a d
dcn9 128.4.0.9 -tfs d e a d
ford1 128.5.0.1 -tfs accepted accepted+ accepted
ford2 128.5.0.2 -tfs accepted accepted+ accepted
ford3 128.5.0.3 -tfs accepted accepted+ accepted
ford4 128.5.0.4 -tfs accepted accepted+ accepted
ford-lab 128.5.0.8 -tfs accepted accepted+ accepted
ford-vax 128.5.0.9 -tfs d e a d
ford-res 128.5.0.10 -tfs d e a d
ford-ecc 128.5.0.11 -tfs
ford-srl 128.5.0.12 -tfs d e a d
ford-ers 128.5.0.13 -tfs accepted accepted+ accepted
ford-eed 128.5.0.14 -tfs accepted accepted+ accepted
ford-foe 128.5.0.15 -tfs d e a d
ford-wdl1 128.5.32.1 -tfs accepted accepted accepted
ford-wdl2 128.5.32.2 -tfs d e a d
ford-wdl3 128.5.32.3 -tfs d e a d
ford-wdl4 128.5.32.4 -tfs d e a d
ford-wdl5 128.5.32.5 -tfs d e a d
ford-wdl6 128.5.32.6 -t-- accepted accepted accepted
dfvlr1 128.7.0.1 -tfs u n r e a c h a b l e
dfvlr2 128.7.0.2 -tfs u n r e a c h a b l e
dfvlr3 128.7.0.3 -tfs u n r e a c h a b l e
dfvlr7 128.7.0.7 -tfs u n r e a c h a b l e
umd1 128.8.0.1 -tfs accepted accepted+ accepted
umd2 128.8.0.2 -t-- refused refused refused
umd3 128.8.0.3 -tfs accepted accepted+ accepted
umd4 128.8.0.4 -tfs d e a d
umd5 128.8.0.5 -tfs accepted accepted+ accepted
umd6 128.8.0.6 -tfs d e a d
umd7 128.8.0.7 -tfs refused refused refused
bbn-cvax 128.11.0.2 -tfs accepted accepted accepted
purdue-tn 14.0.0.1 -tfs
uwisc-tn 14.0.0.2 -tfs accepted accepted+ accepted
rand-tn 14.0.0.3 -tfs
udel-tn 14.0.0.4 -tfs
mit-csr 18.10.0.8 ---s accepted accepted
mit-ajax 18.10.0.64 -tf- accepted accepted accepted
mit-cls 18.10.0.76 -tfs accepted accepted accepted
csnet-sh 192.5.2.3 T--- accepted accepted+ accepted
brl-vld 192.5.21.2 -tfs accepted accepted refused
brl-secad-vg 192.5.21.3 ----
brl-vld-vg 192.5.21.4 ----
brl-vld-gr 192.5.21.5 -tfs
cit-750 192.5.7.3 -tfs accepted accepted accepted
edn-host1 21.1.0.1 -tfs d e a d
bbncca 3.0.0.2 -tfs accepted accepted accepted
bbnccf 3.0.0.4 -tfs accepted accepted accepted
bbns 3.0.0.7 -tfs accepted accepted accepted
bbnx 3.0.0.8 -tfs accepted accepted accepted
csnet-cic 3.0.0.14 -tfs accepted accepted accepted
bbn-noc 3.1.0.14 -tfs accepted accepted accepted
bbnccb 3.1.0.2 -tfs accepted accepted accepted
alta-coma 3.1.0.50 T---
bbn-admin 3.1.0.6 -tfs accepted accepted accepted
bbnz 3.1.0.7 -tfs accepted accepted accepted
bbnccc 3.2.0.2 -tfs accepted accepted accepted
bbnp 3.2.0.4 -tfs accepted accepted accepted
bbn-inoc 3.2.0.6 -tfs accepted accepted accepted
bbnq 3.2.0.7 -tfs accepted accepted accepted
bbny 3.2.0.8 -tfs accepted accepted accepted
bbnccd 3.3.0.2 -tfs accepted accepted accepted
bbncci 3.3.0.4 -tfs accepted accepted accepted
bbnw 3.3.0.6 -tfs accepted accepted accepted
bbn-cd 3.3.0.9 -tfs accepted accepted accepted
satnet 4.0.0.0 ----
etam-expak 4.0.0.1 ----
goonhilly-expak 4.0.0.2 ----
tanum-expak 4.0.0.3 ----
satnet-sink 4.0.0.37 ----
etam-monitor 4.0.0.41 ----
goonhilly-monitor 4.0.0.42 ----
tanum-monitor 4.0.0.43 ----
raisting 4.0.0.72 ----
raisting-monitor 4.0.0.78 ----
raisting-expak 4.0.0.79 ----
fucino 4.0.0.88 ----
fucino-monitor 4.0.0.94 ----
fucino-expak 4.0.0.95 ----
ucbarpa 46.0.0.4 -tf- accepted accepted+ accepted
ucbcad 46.0.0.5 -tf- accepted accepted accepted
ucbernie 46.0.0.6 -tf- accepted accepted accepted
ucbmonet 46.0.0.7 -tf- accepted accepted accepted
ucbesvax 46.0.0.9 -tf- accepted accepted accepted
ucbvax 46.0.0.10 -tf- accepted accepted+ accepted
ucbkim 46.0.0.11 -tf- accepted accepted accepted
ucbcalder 46.0.0.12 -tf- accepted accepted accepted
ucbdali 46.0.0.13 -tf- refused refused accepted
ucbmatisse 46.0.0.14 -tf- accepted accepted accepted
ucbmedea 46.0.0.15 -tf- accepted accepted accepted
ucbingres 46.0.0.19 -tf- accepted accepted accepted
ndre1 48.3.1.41 -tfs accepted accepted+ accepted
clarksburg-expak 8.0.0.4 ---- u n r e a c h a b l e
clarksburg-monitor 8.0.0.44 ---- u n r e a c h a b l e
AI ELI5
On this page
PROBLEMEarly ARPANET developers needed to know which hosts had implemented and deployed the new TCP protocol for standard services like Telnet, FTP and SMTP.
MECHANISMThe survey probed 325 known ARPANET hosts from a single source host between 22 and 23 February 1983, testing whether each would accept TCP connections for three services and recording the results.
BASELINE ADOPTION SNAPSHOTThe results showed widespread adoption of TCP across the ARPANET: 181 hosts accepted Telnet (77%), 173 accepted FTP (74%), and 157 accepted SMTP (67%). Replaced by RFC 847, which repeated the survey for April 1983.
§1Introduction and Methodology
This RFC documents a survey conducted on 22 February 1983 (with retries on 23 February) by David Smallberg to determine which hosts on the ARPANET accepted TCP connections for three important network services: Telnet (remote terminal access), FTP (file transfer), and SMTP (electronic mail transmission).
The survey was performed from a single source host, ISI-VAXA.ARPA, testing 325 hosts listed in the NIC hostname table as of 18 February 1983. Each host was classified in the NIC table by what services it claimed to support (marked as T for TCP, t for Telnet, f for FTP, s for SMTP, or combinations thereof). The survey results showed which of these claims were accurate.
One person sat at a computer and tried to call every computer they knew about to see if it would let them in using TCP. They tested three different types of calls: remote login, file sharing, and mail.
§2Summary Statistics
Out of 325 hosts tested, the survey found substantial TCP adoption. For Telnet, 181 hosts (56%) accepted connections (from hosts claiming Telnet support, 77% worked as claimed). For FTP, 173 hosts (53%) accepted connections (78% of those claiming FTP support). For SMTP, 157 hosts (48%) accepted connections (67% of those claiming SMTP support).
In each category, some hosts were unreachable, some refused the connection, and some were dead or not responding. The survey also documented that a small number of hosts offered FTP with anonymous user access (14 hosts), allowing guest logins without authentication.
The variation in acceptance rates across the three services reflects differences in implementation maturity: terminal access protocols were most mature, file transfer protocols less so, and mail systems had the lowest adoption.
Most computers on the network would let you log in remotely, a lot would let you get files, and fewer would take your mail. Some didn't even answer.
§3Data Organization and Results Format
The RFC presents results in two formats. The first shows all 325 hosts in alphabetical order, listing each host's IP address, what the NIC claimed it supported, and whether it actually accepted connections for Telnet, FTP, and SMTP. Each result was marked as accepted (worked), accepted+ (FTP allowed anonymous guest access), refused (rejected the connection), unreachable (network path down), or dead (host not responding).
The second listing reorganizes the same hosts by network number (the initial octets of their IP address), which allows reading the results organized by ARPANET subnet or organization. This dual presentation helps network administrators understand both the overall landscape and the adoption by their own institution.
The results are listed two ways: alphabetically by computer name, and by network address. Both show what worked and what didn't.
§4Significance and Implications
This survey captures a critical moment in ARPANET history. In 1983, TCP was relatively new (RFC 793, published in 1981), and the network still ran on older NCP (Network Control Protocol) software on many hosts. This snapshot documents the transition mid-flight: most major research institutions and military networks had deployed TCP, but deployment was far from universal.
The survey identifies specific gaps: some institutions with only TCP claims had zero acceptance, while major technology centers like CMU, Stanford, MIT, and UC Berkeley showed consistently high adoption. The presence of 63 completely dead hosts and 7 unreachable networks indicates network infrastructure challenges and highlights why such surveys were valuable to network operators planning migration strategies.
This shows when TCP was new and most computers didn't have it yet. It helped network managers understand what actually worked in the real world, not just what people said they had.
§5References
[1]RFC 793Postel, J., "Transmission Control Protocol", RFC 793, September 1981.September 1981[2]RFC 846Smallberg, D., "Who Talks TCP? - Survey of 22 February 1983", RFC 846, February 1983.February 1983[3]RFC 847Smallberg, D., "Who Talks TCP? - Survey of 26 April 1983", RFC 847, April 1983.February 1983