AS12271 Charter Communications Inc

United States Charter-Communications-TWC-12271-NYC ARIN 111 IPv4 prefixes 8 IPv6 prefixes

IPv4 addresses

2,864,640

IPv6 /48 networks

1,245,712

RPKI

111 valid8 no ROA

Peers and downstreams

Holder

AS name: Charter-Communications-TWC-12271-NYC
Description: Charter-Communications-TWC-12271-NYC
Organisation: Charter Communications Inc
Abuse contact: Not published
Assigned: 2000-06-08
Registered: 2000-06-09
Record last changed: 2018-11-27 16:40 UTC

108.176.0.0/18 108.176.128.0/18 142.105.0.0/17 142.255.0.0/17 149.89.0.0/16 150.221.96.0/19 150.224.177.0/24 158.222.128.0/17 168.148.128.0/19 172.254.0.0/16 184.152.0.0/16 184.153.0.0/17 184.74.128.0/17 184.75.0.0/17 192.131.40.0/22 192.61.128.0/19 198.151.199.0/24 198.151.200.0/24 198.151.201.0/24 198.151.202.0/24 198.151.203.0/24 198.179.64.0/19 204.210.128.0/19 207.251.238.0/23 208.105.0.0/18 208.105.64.0/19 208.125.0.0/19 23.246.64.0/18 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 24.213.160.0/19 24.29.128.0/19 24.29.96.0/19 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 47.230.0.0/16 50.74.0.0/16 50.75.192.0/18 65.86.104.0/21 66.108.0.0/16 66.110.97.0/24 66.65.0.0/17 66.65.128.0/18 66.93.136.0/21 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 69.193.128.0/18 69.193.192.0/19 69.193.224.0/19 69.200.224.0/19 69.200.240.0/21 69.200.64.0/19 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 72.225.128.0/17 72.225.64.0/18 72.226.0.0/17 72.227.128.0/17 72.229.0.0/16 72.231.0.0/17 72.43.128.0/18 72.43.96.0/19 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 98.0.128.0/17 98.12.0.0/16 98.13.128.0/17 98.14.0.0/15 98.7.0.0/17 98.7.192.0/18

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Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade C · 68/100

partly	Prefixes covered by valid ROAs 111 of 119 announced prefixes are RPKI valid, 8 have no ROA.	23/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 8 IPv6 prefixes.	15/15
partly	More than one upstream 1 upstream seen in BGP.	5/10
partly	Working abuse contact abuse@charter.net is published, but charter.net has no mail server (MX).	5/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
fail	Registry record maintained Last changed 2018-11-27.	0/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/12271"><img src="https://ip-fd.net/badge/asn/12271/health.svg" alt="AS12271 network health on IP-FD.net"></a>

Markdown

[![AS12271 network health](https://ip-fd.net/badge/asn/12271/health.svg)](https://ip-fd.net/asn/12271)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

2026-10-04 12:51 UTC	Neighbour gone	AS31869	downstream
2026-10-04 12:51 UTC	Neighbour gone	AS14460	downstream
2026-10-04 12:51 UTC	New neighbour	AS62566	downstream
2026-10-04 12:51 UTC	New neighbour	AS39943	downstream
2026-10-04 12:51 UTC	New neighbour	AS23010	downstream
2026-10-04 12:51 UTC	Relationship changed	AS6453	upstream to peer

WHOIS

aut-num:        AS12271
as-name:        TWC-12271-NYC
handle:         AS12271
registrant:     CC-3517 (Charter Communications Inc)
administrative,technical:IPADD1-ARIN (IPAddressing) <PublicIPAddressing@charter.com>
abuse:          ABUSE19-ARIN (Abuse) <abuse@charter.net>
last changed:   2018-11-27T11:40:17-05:00
registration:   2000-06-09T00:00:00-04:00
source:         ARIN (RDAP)

Routing data

Updated 19 h ago

Registry record

Fetched 19 h ago from ARIN RDAP

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/12271

const res = await fetch('https://ip-fd.net/api/v1/asn/12271', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/12271', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/12271');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/12271", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

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