RFC 838 UNKNOWN SURVEY · NETWORK HOSTS · TCP
Who talks TCP?
A survey of TCP support on Internet hosts in January 1983.
RFC EDITOR
Smallberg, D., "Who talks TCP?", RFC 838, DOI 10.17487/RFC0838, January 1983, <https://www.rfc-editor.org/info/rfc838>.
BIBTEX
@misc{rfc838,
series = {Request for Comments},
number = 838,
howpublished = {RFC 838},
publisher = {RFC Editor},
doi = {10.17487/RFC0838},
url = {https://www.rfc-editor.org/info/rfc838},
author = {D. Smallberg},
title = {{Who talks TCP?}},
pagetotal = 13,
year = 1983,
month = jan,
} LINEAGE · FROM THE RFC INDEXOpen full graph →
RFC text
Network Working Group D. Smallberg
Request for Comments: 838 January 1983
Who Talks TCP?
The list of hosts was taken from the NIC hostname table of 31-Dec-82.
The tests were run on 18-Jan-83 from ~12:01 pm to ~10:10 pm PST.
Dead, refused, and unreachable hosts were retried 19-Jan-83 from ~7:00 pm
to ~1:30 am PST, and 20-Jan-83 from ~10:50 am to 1:00 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 | 12 | 7 | 2 | 22 | 104 | 147
l +-----------+-------------+---------+------+------------+
a tcp | 6 | 0 | 0 | 4 | 17 | 27
i +-----------+-------------+---------+------+------------+
m Nothing | 53 | 4 | 1 | 40 | 51 | 149
+-----------+-------------+---------+------+------------+----
71 11 3 66 172 | 323
FTP Result
accepted or
no tcp/ftp unreachable refused dead accepted+
+-----------+-------------+---------+------+------------+
C tcp/ftp | 11 | 7 | 1 | 19 | 82 | 120
l +-----------+-------------+---------+------+------------+
a tcp | 7 | 0 | 2 | 4 | 14 | 27
i +-----------+-------------+---------+------+------------+
m Nothing | 61 | 4 | 5 | 43 | 63 | 176
+-----------+-------------+---------+------+------------+----
79 11 8 66 159 | 323
SMTP Result
no tcp/smtp unreachable refused dead accepted
+-----------+-------------+---------+------+------------+
C tcp/smtp | 3 | 7 | 2 | 20 | 78 | 110
l +-----------+-------------+---------+------+------------+
a tcp | 8 | 0 | 2 | 4 | 13 | 27
i +-----------+-------------+---------+------+------------+
m Nothing | 70 | 4 | 7 | 42 | 63 | 186
+-----------+-------------+---------+------+------------+----
81 11 11 66 154 | 323
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 ---- accepted accepted accepted
aerospace 10.2.0.65 T--- accepted accepted accepted
afgl 10.1.0.66 ---- accepted accepted
afsc-ad 10.0.0.53 T--- accepted accepted
afsc-dev 10.2.0.53 ---- accepted accepted accepted
afsc-hq 10.0.0.67 ----
afsc-sd 10.0.0.65 ----
afwl 10.0.0.48 ---- accepted accepted
aids-unix 10.3.0.56 ---- u n r e a c h a b l e
alta-coma 3.1.0.50 T---
ames-tss 10.0.0.16 ---- d e a d
ames-vmsb 10.3.0.16 ----
anl 10.0.0.55 ----
anl-mcs 10.1.0.55 ---- accepted accepted accepted
arpa-dms 10.0.0.28 ----
arpa-png11 10.3.0.28 ----
bbn-admin 3.1.0.6 -tfs accepted accepted accepted
bbn-cd 3.3.0.9 -tfs accepted accepted accepted
bbn-clxx 10.2.0.71 -tfs u n r e a c h a b l e
bbn-inoc 10.2.0.82 ----
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 ---s
bbn-rsm 10.4.0.82 -t-- accepted
bbn-tenexb 10.0.0.49 -t-- accepted accepted+ accepted
bbn-tenexc 10.3.0.49 -t-- accepted refused accepted
bbn-unix 10.1.0.72 ---- accepted accepted accepted
bbn-unix 3.1.0.4 -tfs accepted accepted accepted
bbn-vax 10.1.0.82 -tfs accepted accepted accepted
bbna 10.3.0.5 -tf- 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
bbnccd 3.3.0.2 -tfs accepted accepted accepted
bbnccf 3.0.0.4 -tfs accepted accepted accepted
bbncci 3.3.0.4 -tfs accepted accepted accepted
bbnf 10.0.0.5 -tf- accepted accepted accepted
bbng 10.1.0.5 -tf- accepted accepted accepted
bbnp 10.2.0.72 -tfs accepted accepted accepted
bbnq 3.2.0.7 -tfs accepted accepted accepted
bbns 10.3.0.82 -tfs accepted accepted accepted
bbnt 10.0.0.82 ---- accepted accepted accepted
bbnt 3.1.0.7 -tfs accepted accepted accepted
bbnt 3.3.0.7 -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
bnl 10.1.0.58 ---- d e a d
bragg-sta1 10.1.0.38 -t-- d e a d
brl 10.0.0.29 ---- accepted accepted accepted
brl-bmd 10.3.0.29 ---- accepted accepted accepted
cca-unix 10.0.0.31 ---- d e a d
cca-vms 10.1.0.31 T--- d e a d
cctc 10.0.0.20 -t-- d e a d
centacs-mmp 10.0.0.60 ---- d e a d
centacs-tf 10.3.0.60 ---- d e a d
cincpacflt-wm 10.1.0.36 ----
cit-20 10.0.0.54 T--- accepted accepted accepted
cit-750 192.5.7.3 -tfs u n r e a c h a b l e
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 ---s d e a d
cmu-cs-a 10.1.0.14 -t-s accepted accepted accepted
cmu-cs-b 10.0.0.14 ----
cmu-cs-c 10.3.0.14 ---- 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-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-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 ---- accepted refused refused
compion-vms 10.0.0.12 ---s 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 ---- accepted accepted+ accepted
csnet-sh 192.5.2.3 T--- accepted accepted+ accepted
dca-ems 10.4.0.20 ---- accepted accepted accepted
dcn1 128.4.0.1 -tfs accepted accepted+ accepted
dcn2 128.4.0.2 -tfs accepted accepted
dcn3 128.4.0.3 -tfs u n r e a c h a b l e
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 T--- d e a d
dec-marlboro 10.1.0.79 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
dtnsrdc 10.0.0.81 ---- accepted accepted accepted
edn-host1 21.1.0.1 -tfs d e a d
edn-unix 10.3.0.20 -tfs accepted accepted
etac 10.0.0.59 ---- d e a d
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 accepted accepted accepted
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 ---- accepted accepted+ accepted
gunter-unix 10.0.0.13 ----
harv-10 10.0.0.9 ----
hi-multics 10.0.0.80 ---- accepted accepted accepted
isi-png11 10.1.0.27 ----
isi-speech11 10.0.0.22 ---- d e a d
isi-vaxa 10.2.0.27 -t-- accepted accepted accepted
jpl-vax 10.3.0.54 ---- d e a d
kestrel 10.3.0.32 ----
lbl 10.0.0.34 ----
lbl-csam 10.1.0.34 ---s accepted accepted+ accepted
ll 10.0.0.10 ---- accepted accepted accepted
ll-11 10.3.0.10 ----
ll-asg 10.1.0.44 ---- d e a d
ll-en 10.4.0.10 -tfs accepted accepted accepted
ll-iptcp 10.3.44.10 T---
ll-tcp 10.1.0.10 T--- accepted accepted accepted
ll-xn 10.2.0.10 ---- d e a d
lll-mfe 10.1.0.21 ----
lll-unix 10.0.0.21 ---- d e a d
logicon 10.2.0.3 ---- d e a d
martin 10.3.0.53 ----
martin-b 10.1.0.64 -tfs accepted accepted accepted
mcclellan 10.3.0.78 ---- accepted
mit-ai 10.2.0.6 ---- 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 accepted accepted accepted
mit-dms 10.1.0.6 ----
mit-mc 10.3.0.44 ----
mit-ml 10.3.0.6 ---- accepted accepted+ accepted
mit-multics 10.0.0.6 -t-s accepted accepted accepted
mit-tstgw 10.2.0.44 T--- d e a d
mit-xx 10.0.0.44 ---- accepted accepted+ refused
mitre 10.0.0.17 T--- accepted accepted accepted
mitre-bedford 10.0.0.66 ----
nadc 10.2.0.24 ---- d e a d
nadc-vax 10.0.0.24 -tfs accepted accepted accepted
nalcon 10.1.0.81 ---- accepted accepted accepted
nbs-pl 10.3.0.19 ----
nbs-sdc 10.1.0.19 ---- accepted accepted+ accepted
nbs-unix 10.2.0.19 ---- d e a d
nbs-vms 10.0.0.19 ---- accepted accepted accepted
ncsc 10.1.0.53 ---- d e a d
ndre1 48.3.1.41 -tfs accepted accepted+ accepted
nlm-mcs 10.0.0.88 ---- accepted accepted accepted
nosc-cc 10.0.0.3 -tfs accepted accepted accepted
nosc-sdl 10.1.0.35 ---- d e a d
nosc-secure2 10.0.0.35 ----
nosc-secure3 10.3.0.35 ---- d e a d
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 ---- d e a d
nrl-aic 10.1.0.8 T--- accepted accepted accepted
nrl-css 10.7.0.8 ---- 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 ---- accepted accepted
nswc-g 10.1.0.84 T--- accepted accepted accepted
nusc 10.3.0.92 ---- d e a d
nswc-wo 10.2.0.8 ---- d e a d
nusc-npt 10.2.0.92 ----
nwc-387a 10.0.0.85 ---- accepted accepted accepted
nwc-387b 10.3.0.85 ----
nyu 10.0.0.58 ---- accepted accepted accepted
office-1 10.0.0.43 T---
office-10 10.1.0.93 -tf-
office-12 10.2.0.93 T--- accepted refused refused
office-2 10.1.0.43 T---
office-3 10.2.0.43 T--- accepted refused refused
office-7 10.3.0.43 -t--
office-8 10.0.0.93 -t--
okc-unix 10.3.0.46 -t-- accepted
parc-maxc 10.0.0.32 -t-- accepted accepted accepted
purdue 10.0.0.37 -tfs accepted accepted accepted
purdue-tn 14.0.0.1 -tfs accepted accepted accepted
radc-multics 10.0.0.18 ---- accepted accepted accepted
radc-tops20 10.3.0.18 ---- accepted accepted+ accepted
radc-unix 10.5.0.18 ---- d e a d
radc-xper 10.1.0.18 ---- 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 ---- accepted accepted accepted
rand-unix 10.3.0.7 ---- 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 ---- accepted accepted+ accepted
s1-a 10.1.0.95 ----
s1-b 10.2.0.95 ---- d e a d
s1-c 10.3.0.95 ---- accepted accepted accepted
s1-gateway 10.0.0.95 ----
sandia 10.0.0.87 ---- accepted accepted+ accepted
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 ---- accepted accepted+ accepted
sri-csl 10.2.0.2 ----
sri-iu 10.3.0.73 ---- accepted accepted+ accepted
sri-kl 10.1.0.2 T--- accepted accepted+ accepted
sri-nic 10.0.0.73 -t-- accepted refused accepted
sri-nsc11 10.0.0.2 ----
sri-prmh 10.3.2.51 T--- accepted accepted accepted
sri-sta2 10.3.1.51 ----
sri-sta6 10.1.1.51 ----
sri-tsc 10.3.0.2 -tfs accepted accepted+ accepted
sri-unix 10.2.0.51 ---- accepted accepted accepted
sri-warf 10.1.0.73 ---- d e a d
srijoyce 10.1.4.51 -tf- accepted accepted refused
st-nic 10.0.0.51 -t-- d e a d
su-ai 10.0.0.11 ----
su-dsn 10.1.0.56 ---- refused refused accepted
su-score 10.3.0.11 -t-- accepted accepted+ accepted
sumex-aim 10.0.0.56 ---- accepted accepted accepted
tanum-expak 4.0.0.3 ----
tanum-monitor 4.0.0.43 ----
tycho 10.0.0.57 ----
ucb-arpa 10.0.0.78 -tf- accepted accepted+ accepted
ucb-c70 10.1.0.78 ---- d e a d
ucb-ingres 10.2.0.78 -tf- accepted accepted+ accepted
ucbarpa 46.0.0.4 -tf- accepted accepted+ accepted
ucbcad 46.0.0.5 -tf-
ucbcalder 46.0.0.12 -tf- accepted accepted accepted
ucbdali 46.0.0.13 -tf-
ucbernie 46.0.0.6 -tf-
ucbesvax 46.0.0.9 -tf-
ucbingres 46.0.0.19 -tf-
ucbkim 46.0.0.11 -tf- accepted accepted accepted
ucbmatisse 46.0.0.14 -tf-
ucbmedea 46.0.0.15 -tf-
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 ----
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 T--- accepted accepted accepted
ucla-ccn 10.1.0.1 T--- accepted
ucla-security 10.2.0.1 T--- accepted accepted accepted
udel-ee 10.2.0.96 -tf- accepted accepted accepted
udel-relay 10.0.0.96 ---- accepted accepted refused
udel-tcp 10.1.0.96 -tf-
udel-tn 14.0.0.3 -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 d e a d
umd6 128.8.0.6 -tfs d e a d
umd7 128.8.0.7 -tfs refused refused refused
usafa-gateway 10.2.0.69 ---- u n r e a c h a b l e
usc-ecl 10.3.0.23 -t-- accepted accepted+ accepted
usc-eclb 10.0.0.23 -t-- accepted accepted+ accepted
usc-eclc 10.1.0.23 -t-- accepted accepted+ accepted
usc-isi 10.1.0.22 -t-s accepted accepted+ accepted
usc-isib 10.3.0.52 -t-s accepted accepted+ refused
usc-isid 10.0.0.27 -t-s accepted accepted+ accepted
usc-isie 10.1.0.52 -t-s accepted accepted+ accepted
usc-isif 10.2.0.52 -t-s accepted accepted+ accepted
usgs1-amdahl 10.2.0.68 ---- d e a d
usgs1-multics 10.0.0.68 ---- accepted accepted accepted
usgs2-multics 10.0.0.69 ---- accepted accepted accepted
usgs3-multics 10.0.0.70 ---- accepted accepted accepted
utah-20 10.3.0.4 T--- accepted accepted+ accepted
utah-cs 10.0.0.4 -tfs accepted accepted+ accepted
utexas-11 10.0.0.62 ---- accepted accepted accepted
utexas-20 10.1.0.62 ---- accepted accepted+ accepted
uw-vlsi 10.3.0.91 -tf- 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 ----
wpafb 10.0.0.47 ---- accepted accepted
wpafb-afwal 10.1.0.47 ----
yale 10.2.0.9 ---- d e a d
ypg 10.0.0.75 ---- d e a d
Results in host table order:
Name Address Claims Telnet FTP SMTP
---- ------- ------ ------ --- ----
ll 10.0.0.10 ---- accepted accepted accepted
su-ai 10.0.0.11 ----
compion-vms 10.0.0.12 ---s accepted accepted accepted
gunter-unix 10.0.0.13 ----
cmu-cs-b 10.0.0.14 ----
ames-tss 10.0.0.16 ---- d e a d
mitre 10.0.0.17 T--- accepted accepted accepted
radc-multics 10.0.0.18 ---- accepted accepted accepted
nbs-vms 10.0.0.19 ---- accepted accepted accepted
sri-nsc11 10.0.0.2 ----
cctc 10.0.0.20 -t-- d e a d
lll-unix 10.0.0.21 ---- d e a d
isi-speech11 10.0.0.22 ---- d e a d
usc-eclb 10.0.0.23 -t-- accepted accepted+ accepted
nadc-vax 10.0.0.24 -tfs accepted accepted accepted
seismo 10.0.0.25 -tfs accepted accepted accepted
usc-isid 10.0.0.27 -t-s accepted accepted+ accepted
arpa-dms 10.0.0.28 ----
brl 10.0.0.29 ---- accepted accepted accepted
nosc-cc 10.0.0.3 -tfs accepted accepted accepted
cca-unix 10.0.0.31 ---- d e a d
parc-maxc 10.0.0.32 -t-- accepted accepted accepted
nps 10.0.0.33 T---
lbl 10.0.0.34 ----
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 T---
mit-xx 10.0.0.44 ---- accepted accepted+ refused
collins-pr 10.0.0.46 T--- d e a d
wpafb 10.0.0.47 ---- accepted accepted
afwl 10.0.0.48 ---- accepted accepted
bbn-tenexb 10.0.0.49 -t-- accepted accepted+ accepted
bbnf 10.0.0.5 -tf- accepted accepted accepted
st-nic 10.0.0.51 -t-- d e a d
ada-vax 10.0.0.52 ---- accepted accepted accepted
afsc-ad 10.0.0.53 T--- accepted accepted
cit-20 10.0.0.54 T--- accepted accepted accepted
anl 10.0.0.55 ----
sumex-aim 10.0.0.56 ---- accepted accepted accepted
tycho 10.0.0.57 ----
nyu 10.0.0.58 ---- accepted accepted accepted
etac 10.0.0.59 ---- d e a d
mit-multics 10.0.0.6 -t-s accepted accepted accepted
centacs-mmp 10.0.0.60 ---- d e a d
utexas-11 10.0.0.62 ---- 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 ---- accepted accepted accepted
usgs2-multics 10.0.0.69 ---- accepted accepted accepted
usgs3-multics 10.0.0.70 ---- accepted accepted accepted
bbn-nu 10.0.0.72 ---s
sri-nic 10.0.0.73 -t-- accepted refused accepted
ypg 10.0.0.75 ---- d e a d
ucb-arpa 10.0.0.78 -tf- accepted accepted+ accepted
dec-2136 10.0.0.79 T--- d e a d
nrl 10.0.0.8 ---- d e a d
hi-multics 10.0.0.80 ---- accepted accepted accepted
dtnsrdc 10.0.0.81 ---- accepted accepted accepted
bbnt 10.0.0.82 ---- accepted accepted accepted
nswc-dl 10.0.0.84 ---- accepted accepted
nwc-387a 10.0.0.85 ---- accepted accepted accepted
sandia 10.0.0.87 ---- accepted accepted+ accepted
nlm-mcs 10.0.0.88 ---- accepted accepted accepted
harv-10 10.0.0.9 ----
washington 10.0.0.91 -tfs accepted accepted+ accepted
office-8 10.0.0.93 -t--
s1-gateway 10.0.0.95 ----
udel-relay 10.0.0.96 ---- accepted accepted refused
ucla-ccn 10.1.0.1 T--- accepted
ll-tcp 10.1.0.10 T--- accepted accepted accepted
compion 10.1.0.12 ---- accepted refused refused
gunter-adam 10.1.0.13 ---- accepted accepted+ accepted
cmu-cs-a 10.1.0.14 -t-s accepted accepted accepted
radc-xper 10.1.0.18 ---- d e a d
nbs-sdc 10.1.0.19 ---- accepted accepted+ accepted
sri-kl 10.1.0.2 T--- accepted accepted+ accepted
lll-mfe 10.1.0.21 ----
usc-isi 10.1.0.22 -t-s accepted accepted+ accepted
usc-eclc 10.1.0.23 -t-- accepted accepted+ accepted
isi-png11 10.1.0.27 ----
nosc-spel 10.1.0.3 ---- d e a d
cca-vms 10.1.0.31 T--- d e a d
fnoc 10.1.0.33 ---- d e a d
lbl-csam 10.1.0.34 ---s accepted accepted+ accepted
nosc-sdl 10.1.0.35 ---- d e a d
cincpacflt-wm 10.1.0.36 ----
bragg-sta1 10.1.0.38 -t-- d e a d
office-2 10.1.0.43 T---
ll-asg 10.1.0.44 ---- d e a d
collins-gw 10.1.0.46 T---
wpafb-afwal 10.1.0.47 ----
bbng 10.1.0.5 -tf- accepted accepted accepted
usc-isie 10.1.0.52 -t-s accepted accepted+ accepted
ncsc 10.1.0.53 ---- d e a d
cit-vax 10.1.0.54 -tfs accepted accepted accepted
anl-mcs 10.1.0.55 ---- accepted accepted accepted
su-dsn 10.1.0.56 ---- refused refused accepted
coins-gateway 10.1.0.57 ----
bnl 10.1.0.58 ---- d e a d
mit-dms 10.1.0.6 ----
utexas-20 10.1.0.62 ---- accepted accepted+ accepted
martin-b 10.1.0.64 -tfs accepted accepted accepted
afgl 10.1.0.66 ---- accepted accepted
rand-relay 10.1.0.7 ---- accepted accepted accepted
bbn-unix 10.1.0.72 ---- accepted accepted accepted
sri-warf 10.1.0.73 ---- d e a d
mit-devmultics 10.1.0.77 -t-s accepted accepted accepted
ucb-c70 10.1.0.78 ---- d e a d
dec-marlboro 10.1.0.79 T--- accepted accepted accepted
nrl-aic 10.1.0.8 T--- accepted accepted accepted
nalcon 10.1.0.81 ---- 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 -tf-
csnet-sh 10.1.0.94 ---- accepted accepted+ accepted
s1-a 10.1.0.95 ----
udel-tcp 10.1.0.96 -tf-
sri-sta6 10.1.1.51 ----
srijoyce 10.1.4.51 -tf- accepted accepted refused
ucla-security 10.2.0.1 T--- 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 ----
nadc 10.2.0.24 ---- d e a d
isi-vaxa 10.2.0.27 -t-- accepted accepted accepted
logicon 10.2.0.3 ---- d e a d
office-3 10.2.0.43 T--- accepted refused refused
mit-tstgw 10.2.0.44 T--- d e a d
sri-unix 10.2.0.51 ---- accepted accepted accepted
usc-isif 10.2.0.52 -t-s accepted accepted+ accepted
afsc-dev 10.2.0.53 ---- accepted accepted accepted
acc 10.2.0.54 ---- d e a d
rutgers 10.2.0.58 ---- accepted accepted+ accepted
mit-ai 10.2.0.6 ---- accepted accepted+ accepted
aerospace 10.2.0.65 T--- accepted accepted accepted
usgs1-amdahl 10.2.0.68 ---- d e a d
usafa-gateway 10.2.0.69 ---- u n r e a c h a b l e
bbn-clxx 10.2.0.71 -tfs u n r e a c h a b l e
bbnp 10.2.0.72 -tfs accepted accepted accepted
sri-ai 10.2.0.73 ---- accepted accepted+ accepted
ucb-ingres 10.2.0.78 -tf- accepted accepted+ accepted
nswc-wo 10.2.0.8 ---- d e a d
bbn-inoc 10.2.0.82 ----
yale 10.2.0.9 ---- d e a d
nusc-npt 10.2.0.92 ----
office-12 10.2.0.93 T--- accepted refused refused
s1-b 10.2.0.95 ---- d e a d
udel-ee 10.2.0.96 -tf- accepted accepted accepted
ucla-ats 10.3.0.1 T--- accepted accepted accepted
ll-11 10.3.0.10 ----
su-score 10.3.0.11 -t-- accepted accepted+ accepted
cmu-cs-c 10.3.0.14 ---- accepted accepted+ accepted
ames-vmsb 10.3.0.16 ----
radc-tops20 10.3.0.18 ---- accepted accepted+ accepted
nbs-pl 10.3.0.19 ----
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 -t-- accepted accepted+ accepted
wharton-10 10.3.0.24 ----
arpa-png11 10.3.0.28 ----
brl-bmd 10.3.0.29 ---- accepted accepted accepted
nprdc 10.3.0.3 -tfs accepted accepted accepted
kestrel 10.3.0.32 ----
fnoc-secure 10.3.0.33 ----
nosc-secure3 10.3.0.35 ---- d e a d
utah-20 10.3.0.4 T--- accepted accepted+ accepted
office-7 10.3.0.43 -t--
mit-mc 10.3.0.44 ----
okc-unix 10.3.0.46 -t-- accepted
bbn-tenexc 10.3.0.49 -t-- accepted refused accepted
bbna 10.3.0.5 -tf- accepted accepted accepted
sri-sta2 10.3.1.51 ----
sri-prmh 10.3.2.51 T--- accepted accepted accepted
usc-isib 10.3.0.52 -t-s accepted accepted+ refused
martin 10.3.0.53 ----
jpl-vax 10.3.0.54 ---- d e a d
aids-unix 10.3.0.56 ---- u n r e a c h a b l e
mit-ml 10.3.0.6 ---- accepted accepted+ accepted
centacs-tf 10.3.0.60 ---- d e a d
robins-unix 10.3.0.64 ---- d e a d
rand-unix 10.3.0.7 ---- accepted accepted accepted
sri-iu 10.3.0.73 ---- accepted accepted+ accepted
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
bbns 10.3.0.82 -tfs accepted accepted accepted
nwc-387b 10.3.0.85 ----
uw-vlsi 10.3.0.91 -tf- accepted accepted accepted
nusc 10.3.0.92 ---- d e a d
s1-c 10.3.0.95 ---- accepted accepted accepted
cornell 10.3.0.96 -tfs accepted accepted accepted
ll-iptcp 10.3.44.10 T---
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 ---- accepted accepted accepted
bbn-rsm 10.4.0.82 -t-- accepted
radc-unix 10.5.0.18 ---- d e a d
bbn-noc2 10.6.0.82 -tfs accepted accepted accepted
nrl-css 10.7.0.8 ---- 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 ----
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-isl2 128.2.254.152 -tfs accepted accepted accepted
cmu-cs-pt 128.2.254.155 -tfs accepted accepted accepted
cmu 128.2.254.255 ---s d e a d
dcn1 128.4.0.1 -tfs accepted accepted+ accepted
dcn2 128.4.0.2 -tfs accepted accepted
dcn3 128.4.0.3 -tfs u n r e a c h a b l e
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 accepted accepted accepted
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 d e a d
umd6 128.8.0.6 -tfs d e a d
umd7 128.8.0.7 -tfs refused refused refused
purdue-tn 14.0.0.1 -tfs accepted accepted accepted
uwisc-tn 14.0.0.2 -tfs accepted accepted+ accepted
udel-tn 14.0.0.3 -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
cit-750 192.5.7.3 -tfs u n r e a c h a b l e
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
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
bbn-unix 3.1.0.4 -tfs accepted accepted accepted
alta-coma 3.1.0.50 T---
bbn-admin 3.1.0.6 -tfs accepted accepted accepted
bbnt 3.1.0.7 -tfs accepted accepted accepted
bbnccc 3.2.0.2 -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
bbnt 3.3.0.7 -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-
ucbernie 46.0.0.6 -tf-
ucbmonet 46.0.0.7 -tf- accepted accepted accepted
ucbesvax 46.0.0.9 -tf-
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-
ucbmatisse 46.0.0.14 -tf-
ucbmedea 46.0.0.15 -tf-
ucbingres 46.0.0.19 -tf-
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
Page 14
AI ELI5
On this page
PROBLEMEarly in the internet's history, there was no centralized way to know which machines were running TCP and what services they supported.
MECHANISMDavid Smallberg systematically tested 323 hosts from the NIC hostname table by trying to connect to Telnet, FTP, and SMTP services over TCP, recording whether each connection was accepted, refused, unreachable, or failed.
WHAT IT REVEALSOut of 323 hosts tested in January 1983, 172 accepted Telnet, 159 accepted FTP, and 154 accepted SMTP. The results show rapid growth in TCP adoption but also that some machines had stale hostname table entries.
§1The Survey
RFC 838 is the first in a series of surveys by David Smallberg documenting which computers on the early Internet actually supported TCP. From 12 January to 20 January 1983, Smallberg tested 323 hosts listed in the NIC hostname table by attempting to connect to three different services: Telnet, FTP, and SMTP.
Each host was tested for its ability to handle connections on the standard ports for these services. The survey reveals the practical state of TCP deployment in the early internet, which often differed from what the hostname table claimed.
In January 1983, someone tested 323 computers by knocking on their door and asking to play a game. He recorded which ones answered and which ones didn't.
§2How the Tests Were Run
Smallberg based his test list on the NIC hostname table as of 31 December 1982. The initial tests ran from 12 January at ~12:01 pm to 18 January at ~10:10 pm PST. Hosts that were dead, refused the connection, or were unreachable were retried on 19 January and 20 January to improve accuracy.
For each host, the survey recorded whether the host claimed to support each service (based on the hostname table flags: T = tcp, t = tcp/telnet, f = tcp/ftp, s = tcp/smtp) and whether the actual test succeeded, was refused, was unreachable, or found the host dead.
The test list came from a book of computer names. He tried each one, and if he didn't reach it the first time, he tried again the next day.
§3The Results
Of 323 hosts tested, 172 accepted Telnet connections, while 147 hosts claimed to support Telnet in the table. 159 accepted FTP connections out of 120 claiming FTP support. 154 accepted SMTP connections from 110 claiming SMTP. The gap between claims and reality shows that the hostname table was often out of date or inaccurate.
Additionally, 66 hosts were found to be dead (completely unresponsive), 11 were unreachable, and many had no TCP support at all. Among the hosts that did accept connections, some went further: a few FTP implementations allowed the standard test user 'anonymous' with password 'guest'.
Out of 323 computers, 172 answered for Telnet, 159 for file transfers, and 154 for mail. But 66 of them didn't answer at all, which meant they were probably turned off or broken.
| Service | Claims Support | Actually Accepted |
|---|---|---|
| Telnet | 147 | 104 |
| FTP | 120 | 82 |
| SMTP | 110 | 78 |
§4What It Shows
The survey demonstrates that in January 1983, TCP was still being deployed at a rapid pace across the Internet. However, it also shows that not all computers on the network had adopted it yet, and that the central registry of hostnames was lagging behind reality. Many hosts were either dead or obsolete entries in the table.
The data suggests that Telnet was the most widely deployed TCP service, with 104 out of 147 Telnet-claiming hosts actually accepting connections. This early snapshot is valuable because it captures the state of the network in a pre-WWW era when TCP was still finding its place in the Internet ecosystem.
This shows that computers were starting to talk to each other, but not all of them. Some computers on the list didn't exist anymore or had old phone numbers written down.