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AS12271 Charter Communications Inc

TWC-12271-NYC - Charter Communications Inc · registered in the United States

IPv4 addresses2,859,008170 prefixes · 0.091% of announced IPv4
Rank in United States#50largest network in US by IPv4 space, of 18,338 · 0.21% of US
Rank worldwide#152of 79,396 networks with IPv4
IPv619 x /32 (1,245,711 x /48)25 prefixes
CountryUnited States18,679 ASNs registered there
Open AS12271 in ASN lookup Look up an IP in this network (23.246.64.1) All networks in United States

IPv4 prefixes

All 170 prefixes, in address order.

  • 23.246.64.0/18
  • 24.29.96.0/19
  • 24.29.128.0/19
  • 24.30.224.0/20
  • 24.39.104.0/21
  • 24.39.112.0/20
  • 24.39.128.0/19
  • 24.90.0.0/16
  • 24.97.123.0/24
  • 24.97.124.0/22
  • 24.97.184.0/23
  • 24.97.200.0/21
  • 24.102.64.0/18
  • 24.103.0.0/17
  • 24.103.224.0/19
  • 24.104.192.0/18
  • 24.105.128.0/19
  • 24.136.96.0/19
  • 24.161.0.0/17
  • 24.164.128.0/18
  • 24.168.0.0/17
  • 24.168.128.0/19
  • 24.193.0.0/16
  • 24.213.160.0/20
  • 24.213.176.0/21
  • 47.230.0.0/16
  • 50.74.0.0/18
  • 50.74.64.0/20
  • 50.74.80.0/23
  • 50.74.82.0/24
  • 50.74.84.0/22
  • 50.74.88.0/21
  • 50.74.96.0/19
  • 50.74.128.0/17
  • 50.75.192.0/18
  • 65.86.104.0/21
  • 66.65.0.0/17
  • 66.65.128.0/18
  • 66.93.136.0/21
  • 66.108.0.0/16
  • 66.110.97.0/24
  • 67.243.0.0/16
  • 67.244.0.0/19
  • 67.244.64.0/18
  • 67.245.0.0/16
  • 67.247.0.0/18
  • 67.247.96.0/19
  • 67.250.0.0/16
  • 67.251.128.0/19
  • 67.251.192.0/18
  • 67.254.0.0/16
  • 68.165.184.0/21
  • 68.172.208.0/20
  • 68.172.224.0/19
  • 68.173.0.0/16
  • 68.174.0.0/16
  • 68.175.0.0/17
  • 69.193.128.0/17
  • 69.200.64.0/19
  • 69.200.224.0/20
  • 69.200.240.0/21
  • 69.200.248.0/21
  • 69.201.128.0/17
  • 69.202.128.0/17
  • 69.203.0.0/17
  • 69.203.128.0/19
  • 69.203.192.0/18
  • 69.204.224.0/19
  • 69.206.0.0/16
  • 72.43.96.0/20
  • 72.43.112.0/21
  • 72.43.120.0/22
  • 72.43.125.0/24
  • 72.43.126.0/23
  • 72.43.128.0/18
  • 72.225.64.0/18
  • 72.225.128.0/17
  • 72.226.0.0/17
  • 72.227.128.0/17
  • 72.229.0.0/16
  • 72.231.0.0/17
  • 74.0.136.0/21
  • 74.64.0.0/16
  • 74.65.192.0/18
  • 74.66.0.0/16
  • 74.68.0.0/16
  • 74.71.0.0/16
  • 74.72.0.0/15
  • 76.58.52.0/23
  • 98.0.128.0/20
  • 98.0.144.0/21
  • 98.0.152.0/23
  • 98.0.155.0/24
  • 98.0.156.0/22
  • 98.0.160.0/19
  • 98.0.192.0/19
  • 98.0.224.0/21
  • 98.0.232.0/22
  • 98.0.237.0/24
  • 98.0.238.0/23
  • 98.0.240.0/20
  • 98.7.0.0/17
  • 98.7.192.0/18
  • 98.12.0.0/16
  • 98.13.128.0/17
  • 98.14.0.0/15
  • 108.176.0.0/18
  • 108.176.128.0/18
  • 142.105.0.0/18
  • 142.105.64.0/24
  • 142.105.66.0/24
  • 142.105.68.0/22
  • 142.105.72.0/23
  • 142.105.74.0/24
  • 142.105.76.0/22
  • 142.105.80.0/20
  • 142.105.96.0/19
  • 142.255.0.0/17
  • 149.89.0.0/16
  • 150.221.96.0/19
  • 150.224.177.0/24
  • 158.222.128.0/17
  • 168.148.128.0/19
  • 172.254.0.0/24
  • 172.254.2.0/23
  • 172.254.4.0/22
  • 172.254.8.0/21
  • 172.254.16.0/21
  • 172.254.24.0/22
  • 172.254.28.0/24
  • 172.254.30.0/24
  • 172.254.32.0/19
  • 172.254.64.0/20
  • 172.254.80.0/21
  • 172.254.88.0/22
  • 172.254.92.0/24
  • 172.254.94.0/23
  • 172.254.96.0/19
  • 172.254.128.0/22
  • 172.254.132.0/24
  • 172.254.134.0/23
  • 172.254.136.0/21
  • 172.254.144.0/20
  • 172.254.160.0/19
  • 172.254.192.0/18
  • 184.74.128.0/18
  • 184.74.192.0/19
  • 184.74.224.0/20
  • 184.74.240.0/21
  • 184.74.248.0/23
  • 184.74.250.0/24
  • 184.74.252.0/22
  • 184.75.0.0/17
  • 184.152.0.0/16
  • 184.153.0.0/17
  • 192.61.128.0/19
  • 192.131.40.0/22
  • 198.151.199.0/24
  • 198.151.200.0/22
  • 198.179.64.0/19
  • 204.210.128.0/19
  • 207.251.238.0/23
  • 208.105.0.0/19
  • 208.105.32.0/20
  • 208.105.48.0/21
  • 208.105.56.0/22
  • 208.105.60.0/24
  • 208.105.62.0/23
  • 208.105.64.0/19
  • 208.125.0.0/19

IPv6 prefixes

All 25 prefixes.

  • 2600:6000::/33
  • 2600:6000:8000::/34
  • 2600:6000:c000::/35
  • 2600:6000:e000::/36
  • 2600:6000:f000::/37
  • 2600:6000:f800::/39
  • 2600:6000:fa00::/40
  • 2600:6000:fb00::/43
  • 2600:6000:fb20::/44
  • 2600:6000:fb30::/46
  • 2600:6000:fb35::/48
  • 2600:6000:fb36::/47
  • 2600:6000:fb38::/45
  • 2600:6000:fb40::/42
  • 2600:6000:fb80::/41
  • 2600:6000:fc00::/38
  • 2600:6c7f:9360::/44
  • 2602:107:6300::/43
  • 2602:107:6320::/43
  • 2602:107:6340::/42
  • 2602:107:6380::/41
  • 2602:107:e400::/40
  • 2603:7000::/28
  • 2603:90be::/32
  • 2604:2000::/32

Other ASNs named Charter Communications Inc

15 other networks use the same organisation name; together with AS12271 they announce 38,531,840 IPv4 addresses.

ASNNameIPv4 addresses
AS10796TWC-10796-MIDWEST - Charter Communications Inc US7,405,568
AS20001TWC-20001-PACWEST - Charter Communications Inc US7,210,752
AS11427TWC-11427-TEXAS - Charter Communications Inc US5,789,696
AS33363BHN-33363 - Charter Communications, Inc US5,679,360
AS11426TWC-11426-CAROLINAS - Charter Communications Inc US4,389,888
AS11351TWC-11351-NORTHEAST - Charter Communications Inc US4,317,440
AS7843TWC-7843-BB - Charter Communications Inc US438,784
AS10838OCEANIC-INTERNET-RR - Charter Communications Inc US165,120
AS3456TWC-3456-IT - Charter Communications Inc US142,336
AS11955TWC-11955-ATLANTA - Charter Communications Inc US60,160
AS20231TWC-20231-NE-KS-C3 - Charter Communications Inc US22,016
AS14065TWC-14065-COUDERSPORT - Charter Communications Inc US18,432
AS13343TWC-13343-CHARLOTTE - Charter Communications Inc US17,408
AS8052TWC-8052-PEAKVIEW - Charter Communications Inc US14,592
AS6534OCEANIC-CABLE - Charter Communications Inc US1,280

Similar-sized networks in United States

ASNNameIPv4 addresses
AS4155#47 USDA-1 - USDA3,147,776
AS33491#48 COMCAST-33491 - Comcast Cable Communications, LLC3,142,144
AS19901#49 BRIGHTSPEED - Brightspeed3,011,840
AS19108#51 SUDDENLINK-COMMUNICATIONS - Optimum2,839,808
AS1761#52 TDIR-CAPNET - General Services Commission2,753,024
AS668#53 DNIC-AS-00668 - United States Department of Defense (DoD)2,549,504

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources