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IETF RFC 839
Who talks TCP?
Last modified on Wednesday, September 23rd, 1992
 Permanent link to RFC 839
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Network Working Group D. Smallberg
Request for Comments: 839 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 25-Jan-83 from ~10:00 am to ~6:30 pm PST.
Dead, refused, and unreachable hosts were retried 26-Jan-83 from ~8:00 am
to ~6:10 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 | 9 | 6 | 2 | 20 | 110 | 147
l +-----------+-------------+---------+------+------------+
a tcp | 7 | 1 | 0 | 3 | 16 | 27
i +-----------+-------------+---------+------+------------+
m Nothing | 58 | 4 | 1 | 30 | 56 | 149
+-----------+-------------+---------+------+------------+----
74 11 3 53 182 | 323
FTP Result
accepted or
no tcp/ftp unreachable refused dead accepted+
+-----------+-------------+---------+------+------------+
C tcp/ftp | 10 | 6 | 2 | 18 | 84 | 120
l +-----------+-------------+---------+------+------------+
a tcp | 8 | 1 | 2 | 3 | 13 | 27
i +-----------+-------------+---------+------+------------+
m Nothing | 64 | 4 | 8 | 32 | 68 | 176
+-----------+-------------+---------+------+------------+----
82 11 12 53 165 | 323
Page 1
SMTP Result
no tcp/smtp unreachable refused dead accepted
+-----------+-------------+---------+------+------------+
C tcp/smtp | 2 | 6 | 1 | 19 | 82 | 110
l +-----------+-------------+---------+------+------------+
a tcp | 9 | 1 | 2 | 3 | 12 | 27
i +-----------+-------------+---------+------+------------+
m Nothing | 76 | 4 | 10 | 31 | 65 | 186
+-----------+-------------+---------+------+------------+----
87 11 13 53 159 | 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
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 ---- accepted accepted accepted
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 ---- d e a d
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
Page 2
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 refused
cca-unix 10.0.0.31 ---- u n r e a c h a b l e
cca-vms 10.1.0.31 T--- u n r e a c h a b l e
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 ----
clarksburg-monitor 8.0.0.44 ---- d e a d
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---
Page 3
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+ accepted
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 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 ----
Page 4
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 ----
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 ---- accepted accepted+
mit-mc 10.3.0.44 ---- accepted accepted+ accepted
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 ---- u n r e a c h a b l e
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 ----
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
Page 5
nprdc 10.3.0.3 -tfs accepted accepted accepted
nps 10.0.0.33 T---
nrl 10.0.0.8 ---- accepted accepted accepted
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
nswc-wo 10.2.0.8 ---- accepted accepted accepted
nusc 10.3.0.92 ---- d e a d
nusc-npt 10.2.0.92 ----
nwc-387a 10.0.0.85 ---- d e a d
nwc-387b 10.3.0.85 ---- accepted accepted accepted
nyu 10.0.0.58 ---- accepted accepted accepted
office-1 10.0.0.43 T---
office-10 10.1.0.93 -tf- accepted refused refused
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-- accepted refused refused
office-8 10.0.0.93 -t-- accepted refused refused
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 ----
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 refused
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---
sri-sta2 10.3.1.51 ----
Page 6
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 ----
srijoyce 10.1.4.51 -tf- accepted accepted refused
st-nic 10.0.0.51 -t-- accepted refused refused
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
ucl-ucl2 11.3.2.42 ----
ucl-ucl3 11.3.3.42 ----
ucl-ucl4 11.3.4.42 ----
ucl-ucl5 11.3.5.42 ----
ucl-ucl6 11.3.6.42 ----
ucl-ucl7 11.3.7.42 ----
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 accepted
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 accepted accepted+ accepted
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
Page 7
usc-isi 10.1.0.22 -t-s accepted accepted+ accepted
usc-isib 10.3.0.52 -t-s accepted accepted+ accepted
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 ---- accepted
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 ---- accepted accepted accepted
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 ----
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 ---- d e a d
brl 10.0.0.29 ---- accepted accepted accepted
nosc-cc 10.0.0.3 -tfs accepted accepted accepted
cca-unix 10.0.0.31 ---- u n r e a c h a b l e
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
Page 8
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-- accepted refused refused
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 ---- accepted accepted accepted
hi-multics 10.0.0.80 ---- accepted accepted accepted
bbnt 10.0.0.82 ---- accepted accepted accepted
dtnsrdc 10.0.0 .81 ---- accepted accepted accepted
nswc-dl 10.0.0.84 ---- accepted accepted
nwc-387a 10.0.0.85 ---- d e a d
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-- accepted refused refused
s1-gateway 10.0.0.95 ----
udel-relay 10.0.0.96 ---- accepted accepted accepted
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 ----
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
Page 9
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--- u n r e a c h a b l e
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 ----
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 ---- accepted
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 ---- accepted accepted+
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 ----
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- accepted refused refused
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 ---- u n r e a c h a b l e
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
acc 10.2.0.54 ---- d e a d
Page 10
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 ---- accepted accepted accepted
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 refused
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-- accepted refused refused
mit-mc 10.3.0.44 ---- accepted accepted+ accepted
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---
usc-isib 10.3.0.52 -t-s accepted accepted+ accepted
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
Page 11
nwc-387b 10.3.0.85 ---- accepted accepted accepted
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 refused
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
ucl-ucl2 11.3.2.42 ----
ucl-ucl3 11.3.3.42 ----
ucl-ucl4 11.3.4.42 ----
ucl-ucl5 11.3.5.42 ----
ucl-ucl6 11.3.6.42 ----
ucl-ucl7 11.3.7.42 ----
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 ted accepted+ accepted
dcn2 128.4.0.2 -tfs accepted accepted+ accepted
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
Page 12
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 accepted accepted+ accepted
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 ----
Page 13
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 ----
clarksburg-monitor 8.0.0.44 ---- d e a d
Page 14
Who talks TCP?
RFC TOTAL SIZE: 45175 bytes
PUBLICATION DATE: Wednesday, September 23rd, 1992
LEGAL RIGHTS: The IETF Trust (see BCP 78)
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