subnet.im

AS12271Charter Communications Inc

United StatesRegistryARINTypeEyeball

As of 10th November 2026, AS12271 (Charter Communications Inc), an access network registered in the United States with ARIN, originates 111 IPv4 prefixes covering 2.9M addresses and 8 IPv6 prefixes. By IPv4 address space that makes it the 204th-largest of the 80,733 networks we see originating IPv4, and the 54th-largest of 18,751 in the United States. It is seen behind 2 upstream networks, most often AS7843 (Spectrum (Charter)) and AS6453 (TATA Communications (America) Inc), and in front of 52 downstream networks. 93% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

111

IPv6 prefixes

8

IPv4 addresses

2.9M

IPv6 /64s

81.6B

Upstream graph

The networks AS12271 is seen behind, one and two hops out, drawn from real AS paths.

AS12271Toward the internet core
Upstream graph for AS12271: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS12271Charter Communica…This networkAS6453TATA Communicatio…AS7843Spectrum (Charter)AS8220COLTAS35280F5 Networks SARLAS1299Arelion (fka. Tel…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS12271 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

109

adjacent networks

Upstreams
22%
Peers
5550%
Downstreams
5248%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS12271
NetworkCountryRelationshipPathsVantage pts
AS7843Spectrum (Charter)USPeer13,088139
AS6453TATA Communications (America) IncUSPeer3434

Prefixes

All 119

The largest blocks AS12271 originates, widest first.

Largest prefixes originated by AS12271
PrefixAddressesVisibility
74.72.0.0/15131k76/76
98.14.0.0/15131k76/76
24.90.0.0/1665.5k76/76
24.193.0.0/1665.5k76/76
47.230.0.0/1665.5k76/76
50.74.0.0/1665.5k76/76
66.108.0.0/1665.5k76/76
67.243.0.0/1665.5k76/76
67.245.0.0/1665.5k76/76
67.250.0.0/1665.5k76/76

Routing health

How AS12271's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid93.3%111
  • Invalid0.0%0
  • No ROA6.7%8

Propagation

  • Globally propagated90% of full-feed peers or more100.0%119
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 111 prefixes

IPv6 — 8 prefixes

  • /2868.7B × /6412.5%1
  • /324.3B × /6437.5%3
  • /4016.8M × /6425.0%2
  • /441M × /6425.0%2

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS12271 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.