Summary
| ASN | AS7922 Comcast Cable Communications, LLC |
| BGP | 172.244.0.0/16 |
| IPs with RDNS | 75 |
| Hosted Domains | 0 |
| Pingable IPs | 38 |
| Router IPs | 0 |
| 172.244.21.0 | — | 0 |  | |
| 172.244.21.1 | gi-0-0-0-14-3997-ssag02.ellicttcty.md.bad.comcast.net | 0 |  | |
| 172.244.21.2 | — | 0 | | |
| 172.244.21.3 | — | 0 | | |
| 172.244.21.4 | — | 0 | | |
| 172.244.21.5 | bv-1-1-32-3966-soag02.berlin.md.bad.comcast.net | 0 | | |
| 172.244.21.6 | e5439681f4d19.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.7 | — | 0 | | |
| 172.244.21.8 | — | 0 | | |
| 172.244.21.9 | gi-0-0-0-37-3800-ssag04.annapolis.md.bad.comcast.net | 0 | | |
| 172.244.21.10 | p00a0c8e449aa.fib.bct.comcast.net | 0 | | |
| 172.244.21.11 | — | 0 | | |
| 172.244.21.12 | — | 0 | | |
| 172.244.21.13 | — | 0 | | |
| 172.244.21.14 | — | 0 | | |
| 172.244.21.15 | — | 0 | | |
| 172.244.21.16 | — | 0 | | |
| 172.244.21.17 | bv-1-1-40-3991-soag02.rockville.md.bad.comcast.net | 0 | | |
| 172.244.21.18 | e54396802d24d.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.19 | — | 0 | | |
| 172.244.21.20 | — | 0 | | |
| 172.244.21.21 | — | 0 | | |
| 172.244.21.22 | — | 0 | | |
| 172.244.21.23 | — | 0 | | |
| 172.244.21.24 | — | 0 | | |
| 172.244.21.25 | — | 0 | | |
| 172.244.21.26 | — | 0 | | |
| 172.244.21.27 | — | 0 | | |
| 172.244.21.28 | — | 0 | | |
| 172.244.21.29 | — | 0 | | |
| 172.244.21.30 | — | 0 | | |
| 172.244.21.31 | — | 0 | | |
| 172.244.21.32 | — | 0 | | |
| 172.244.21.33 | — | 0 | | |
| 172.244.21.34 | — | 0 | | |
| 172.244.21.35 | — | 0 | | |
| 172.244.21.36 | — | 0 | | |
| 172.244.21.37 | eg-1-1-33-3976-soag14.capitolhghts.md.bad.comcast.net | 0 | | |
| 172.244.21.38 | p001992845484.fib.bct.comcast.net | 0 | | |
| 172.244.21.39 | — | 0 | | |
| 172.244.21.40 | — | 0 | | |
| 172.244.21.41 | te-0-0-0-0-3985-ssag11.elkridge.md.bad.comcast.net | 0 | | |
| 172.244.21.42 | p001992fe12c1.fib.bct.comcast.net | 0 | | |
| 172.244.21.43 | — | 0 | | |
| 172.244.21.44 | — | 0 | | |
| 172.244.21.45 | — | 0 | | |
| 172.244.21.46 | — | 0 | | |
| 172.244.21.47 | — | 0 | | |
| 172.244.21.48 | — | 0 | | |
| 172.244.21.49 | — | 0 | | |
| 172.244.21.50 | — | 0 | | |
| 172.244.21.51 | — | 0 | | |
| 172.244.21.52 | — | 0 | | |
| 172.244.21.53 | bv-1-1-37-3988-soag06.longhill.md.bad.comcast.net | 0 | | |
| 172.244.21.54 | e54396803063b.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.55 | — | 0 | | |
| 172.244.21.56 | — | 0 | | |
| 172.244.21.57 | eg-1-1-27-3965-soag05.lewes.de.bad.comcast.net | 0 | | |
| 172.244.21.58 | e5439680af670.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.59 | — | 0 | | |
| 172.244.21.60 | — | 0 | | |
| 172.244.21.61 | pr-1-1-35-3992-soag05.desoto.md.bad.comcast.net | 0 | | |
| 172.244.21.62 | p00a0c8c9676d.fib.bct.comcast.net | 0 | | |
| 172.244.21.63 | — | 0 | | |
| 172.244.21.64 | — | 0 | | |
| 172.244.21.65 | — | 0 | | |
| 172.244.21.66 | p00a0c8c967bd.fib.bct.comcast.net | 0 | | |
| 172.244.21.67 | — | 0 | | |
| 172.244.21.68 | — | 0 | | |
| 172.244.21.69 | — | 0 | | |
| 172.244.21.70 | — | 0 | | |
| 172.244.21.71 | — | 0 | | |
| 172.244.21.72 | — | 0 | | |
| 172.244.21.73 | — | 0 | | |
| 172.244.21.74 | — | 0 | | |
| 172.244.21.75 | — | 0 | | |
| 172.244.21.76 | — | 0 | | |
| 172.244.21.77 | gi-0-0-0-36-3994-ssag05.gambrills.md.bad.comcast.net | 0 | | |
| 172.244.21.78 | — | 0 | | |
| 172.244.21.79 | — | 0 | | |
| 172.244.21.80 | — | 0 | | |
| 172.244.21.81 | eg-1-1-16-3990-soag03.lewes.de.bad.comcast.net | 0 | | |
| 172.244.21.82 | e54396820dcca.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.83 | — | 0 | | |
| 172.244.21.84 | — | 0 | | |
| 172.244.21.85 | bv-1-1-17-3994-soag07.aberdeen.md.bad.comcast.net | 0 | | |
| 172.244.21.86 | e5439682130ee.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.87 | — | 0 | | |
| 172.244.21.88 | — | 0 | | |
| 172.244.21.89 | — | 0 | | |
| 172.244.21.90 | — | 0 | | |
| 172.244.21.91 | — | 0 | | |
| 172.244.21.92 | — | 0 | | |
| 172.244.21.93 | — | 0 | | |
| 172.244.21.94 | — | 0 | | |
| 172.244.21.95 | — | 0 | | |
| 172.244.21.96 | — | 0 | | |
| 172.244.21.97 | gi-0-0-0-18-3983-ssag02.elkridge.md.bad.comcast.net | 0 | | |
| 172.244.21.98 | — | 0 | | |
| 172.244.21.99 | — | 0 | | |
| 172.244.21.100 | — | 0 | | |
| 172.244.21.101 | gi-0-0-0-28-4000-ssag02.lakeridge.va.bad.comcast.net | 0 | | |
| 172.244.21.102 | — | 0 | | |
| 172.244.21.103 | — | 0 | | |
| 172.244.21.104 | — | 0 | | |
| 172.244.21.105 | gi-0-0-0-25-3977-ssag02.catharpin.va.bad.comcast.net | 0 | | |
| 172.244.21.106 | — | 0 | | |
| 172.244.21.107 | — | 0 | | |
| 172.244.21.108 | — | 0 | | |
| 172.244.21.109 | gi-0-0-0-30-3991-ssag02.aberdeen.md.bad.comcast.net | 0 | | |
| 172.244.21.110 | p00a0c8b50b40.fib.bct.comcast.net | 0 | | |
| 172.244.21.111 | — | 0 | | |
| 172.244.21.112 | — | 0 | | |
| 172.244.21.113 | gi-0-0-0-29-3993-ssag07.metrodr.md.bad.comcast.net | 0 | | |
| 172.244.21.114 | p00a0c8c1ce9f.fib.bct.comcast.net | 0 | | |
| 172.244.21.115 | — | 0 | | |
| 172.244.21.116 | — | 0 | | |
| 172.244.21.117 | pr-1-1-9-3991-soag15.metrodr.md.bad.comcast.net | 0 | | |
| 172.244.21.118 | p00a0c8b520a8.fib.bct.comcast.net | 0 | | |
| 172.244.21.119 | — | 0 | | |
| 172.244.21.120 | — | 0 | | |
| 172.244.21.121 | eg-1-1-37-3994-soag20.rockville.md.bad.comcast.net | 0 | | |
| 172.244.21.122 | p00a0c8c9685d.fib.bct.comcast.net | 0 | | |
| 172.244.21.123 | — | 0 | | |
| 172.244.21.124 | — | 0 | | |
| 172.244.21.125 | gi-0-0-0-10-3997-ssag13.hyattsville.md.bad.comcast.net | 0 | | |
| 172.244.21.126 | — | 0 | | |
| 172.244.21.127 | — | 0 | | |
| 172.244.21.128 | — | 0 | | |
| 172.244.21.129 | — | 0 | | |
| 172.244.21.130 | p00a0c8c966b9.fib.bct.comcast.net | 0 | | |
| 172.244.21.131 | — | 0 | | |
| 172.244.21.132 | — | 0 | | |
| 172.244.21.133 | — | 0 | | |
| 172.244.21.134 | e543968116549.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.135 | — | 0 | | |
| 172.244.21.136 | — | 0 | | |
| 172.244.21.137 | — | 0 | | |
| 172.244.21.138 | — | 0 | | |
| 172.244.21.139 | — | 0 | | |
| 172.244.21.140 | — | 0 | | |
| 172.244.21.141 | bv-1-1-12-3879-soag08.kirkave.md.bad.comcast.net | 0 | | |
| 172.244.21.142 | e5439681ef7b7.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.143 | — | 0 | | |
| 172.244.21.144 | — | 0 | | |
| 172.244.21.145 | gi-0-0-0-24-3996-ssag03.elkridge.md.bad.comcast.net | 0 | | |
| 172.244.21.146 | e5439681f8702.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.147 | — | 0 | | |
| 172.244.21.148 | — | 0 | | |
| 172.244.21.149 | — | 0 | | |
| 172.244.21.150 | — | 0 | | |
| 172.244.21.151 | — | 0 | | |
| 172.244.21.152 | — | 0 | | |
| 172.244.21.153 | pr-1-1-43-3964-soag01.berlin.md.bad.comcast.net | 0 | | |
| 172.244.21.154 | p00a0c8ddbd12.fib.bct.comcast.net | 0 | | |
| 172.244.21.155 | — | 0 | | |
| 172.244.21.156 | — | 0 | | |
| 172.244.21.157 | gi-0-0-0-22-3943-ssag02.lakeridge.va.bad.comcast.net | 0 | | |
| 172.244.21.158 | p001992fe1990.fib.bct.comcast.net | 0 | | |
| 172.244.21.159 | — | 0 | | |
| 172.244.21.160 | — | 0 | | |
| 172.244.21.161 | gi-0-0-0-5-3986-ssag07.lanham.md.bad.comcast.net | 0 | | |
| 172.244.21.162 | — | 0 | | |
| 172.244.21.163 | — | 0 | | |
| 172.244.21.164 | — | 0 | | |
| 172.244.21.165 | gi-0-0-0-13-4000-ssag03.woodlawn.md.bad.comcast.net | 0 | | |
| 172.244.21.166 | — | 0 | | |
| 172.244.21.167 | — | 0 | | |
| 172.244.21.168 | — | 0 | | |
| 172.244.21.169 | gi-0-0-0-18-3997-ssag03.waldorf.md.bad.comcast.net | 0 | | |
| 172.244.21.170 | — | 0 | | |
| 172.244.21.171 | — | 0 | | |
| 172.244.21.172 | — | 0 | | |
| 172.244.21.173 | gi-0-0-0-21-3984-ssag03.howardcounty.md.bad.comcast.net | 0 | | |
| 172.244.21.174 | p00a0c8c966cb.fib.bct.comcast.net | 0 | | |
| 172.244.21.175 | — | 0 | | |
| 172.244.21.176 | — | 0 | | |
| 172.244.21.177 | gi-0-0-0-21-3983-ssag03.howardcounty.md.bad.comcast.net | 0 | | |
| 172.244.21.178 | — | 0 | | |
| 172.244.21.179 | — | 0 | | |
| 172.244.21.180 | — | 0 | | |
| 172.244.21.181 | te-0-0-0-8-3994-ssag01.cambridge.md.bad.comcast.net | 0 | | |
| 172.244.21.182 | — | 0 | | |
| 172.244.21.183 | — | 0 | | |
| 172.244.21.184 | — | 0 | | |
| 172.244.21.185 | — | 0 | | |
| 172.244.21.186 | — | 0 | | |
| 172.244.21.187 | — | 0 | | |
| 172.244.21.188 | — | 0 | | |
| 172.244.21.189 | xe-0-1-0-3987-sur01.ashburn.va.bad.comcast.net | 0 | | |
| 172.244.21.190 | p00a0c8ae17a2.fib.bct.comcast.net | 0 | | |
| 172.244.21.191 | — | 0 | | |
| 172.244.21.192 | — | 0 | | |
| 172.244.21.193 | gi-0-0-0-30-3858-ssag02.doverwd.de.bad.comcast.net | 0 | | |
| 172.244.21.194 | — | 0 | | |
| 172.244.21.195 | — | 0 | | |
| 172.244.21.196 | — | 0 | | |
| 172.244.21.197 | bv-1-1-47-3986-soag10.metrodr.md.bad.comcast.net | 0 | | |
| 172.244.21.198 | e543968031ba7.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.199 | — | 0 | | |
| 172.244.21.200 | — | 0 | | |
| 172.244.21.201 | te-0-0-0-13-3984-ssag10.hyattsville.md.bad.comcast.net | 0 | | |
| 172.244.21.202 | — | 0 | | |
| 172.244.21.203 | — | 0 | | |
| 172.244.21.204 | — | 0 | | |
| 172.244.21.205 | gi-0-0-0-17-3988-ssag10.frederick.md.bad.comcast.net | 0 | | |
| 172.244.21.206 | p00a0c8ddb682.fib.bct.comcast.net | 0 | | |
| 172.244.21.207 | — | 0 | | |
| 172.244.21.208 | — | 0 | | |
| 172.244.21.209 | gi-0-0-0-9-3973-ssag03.elkridge.md.bad.comcast.net | 0 | | |
| 172.244.21.210 | p00a0c8ca3511.fib.bct.comcast.net | 0 | | |
| 172.244.21.211 | — | 0 | | |
| 172.244.21.212 | — | 0 | | |
| 172.244.21.213 | bv-1-1-2-3990-soag05.westminster.md.bad.comcast.net | 0 | | |
| 172.244.21.214 | e54396802f7b9.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.215 | — | 0 | | |
| 172.244.21.216 | — | 0 | | |
| 172.244.21.217 | si-1-1-36-3858-soag05.ebaltimorest.md.bad.comcast.net | 0 | | |
| 172.244.21.218 | s002445933e32.fib.bct.comcast.net | 0 | | |
| 172.244.21.219 | — | 0 | | |
| 172.244.21.220 | — | 0 | | |
| 172.244.21.221 | — | 0 | | |
| 172.244.21.222 | — | 0 | | |
| 172.244.21.223 | — | 0 | | |
| 172.244.21.224 | — | 0 | | |
| 172.244.21.225 | bv-1-1-16-3947-soag01.kirkave.md.bad.comcast.net | 0 | | |
| 172.244.21.226 | — | 0 | | |
| 172.244.21.227 | — | 0 | | |
| 172.244.21.228 | — | 0 | | |
| 172.244.21.229 | — | 0 | | |
| 172.244.21.230 | — | 0 | | |
| 172.244.21.231 | — | 0 | | |
| 172.244.21.232 | — | 0 | | |
| 172.244.21.233 | pr-1-1-22-3990-soag09.michiganave.dc.bad.comcast.net | 0 | | |
| 172.244.21.234 | p001992b5ba28.fib.bct.comcast.net | 0 | | |
| 172.244.21.235 | — | 0 | | |
| 172.244.21.236 | — | 0 | | |
| 172.244.21.237 | bv-1-1-28-3982-soag01.benning.dc.bad.comcast.net | 0 | | |
| 172.244.21.238 | e5439681fc629.bcdv-eme.natl.comcast.net | 0 | | |
| 172.244.21.239 | — | 0 | | |
| 172.244.21.240 | — | 0 | | |
| 172.244.21.241 | — | 0 | | |
| 172.244.21.242 | — | 0 | | |
| 172.244.21.243 | — | 0 | | |
| 172.244.21.244 | — | 0 | | |
| 172.244.21.245 | gi-0-0-0-29-3790-ssag07.elkridge.md.bad.comcast.net | 0 | | |
| 172.244.21.246 | p002445588a37.fib.bct.comcast.net | 0 | | |
| 172.244.21.247 | — | 0 | | |
| 172.244.21.248 | — | 0 | | |
| 172.244.21.249 | eg-1-1-40-3985-soag06.gaithersburg.md.bad.comcast.net | 0 | | |
| 172.244.21.250 | p00a0c8c1d1e9.fib.bct.comcast.net | 0 | | |
| 172.244.21.251 | — | 0 | | |
| 172.244.21.252 | — | 0 | | |
| 172.244.21.253 | — | 0 | | |
| 172.244.21.254 | — | 0 | | |
| 172.244.21.255 | — | 0 | | |
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
$
traceroute -a -n -q1 -f4 172.244.21.81
traceroute to 172.244.21.81 (172.244.21.81): 64 hops max, 52 byte packets
Measurement taken from 
IPinfo ProbeNet in Dallas, US
IPinfo ProbeNet in Dallas, USOn