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AS3456Charter Communications Inc

United StatesRegistryARIN

As of 26th September 2026, AS3456 (Charter Communications Inc), a network registered in the United States with ARIN, originates 9 IPv4 prefixes covering 143k addresses and 7 IPv6 prefixes. By IPv4 address space that makes it the 1,716th-largest of the 79,516 networks we see originating IPv4, and the 490th-largest of 18,424 in the United States. It is seen behind 2 upstream networks, most often AS7843 (Spectrum (Charter)) and AS20001 (Charter Communications Inc). Every one of its announcements has 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

9

IPv6 prefixes

7

IPv4 addresses

143k

IPv6 /64s

537M

Upstream graph

The networks AS3456 is seen behind, one and two hops out, drawn from real AS paths.

AS3456Toward the internet core
Upstream graph for AS3456: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS3456Charter Communica…This networkAS7843Spectrum (Charter)AS20001Charter Communica…AS1299Arelion (fka. Tel…AS6939Hurricane Electri…AS20115Spectrum (Charter)

Networks observed one and two hops upstream of AS3456 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS3456
NetworkCountryRelationshipPathsVantage pts
AS7843Spectrum (Charter)USPeer857145
AS20001Charter Communications IncUSPeer32064

Prefixes

The largest blocks AS3456 originates, widest first.

Largest prefixes originated by AS3456
PrefixAddressesVisibility
142.136.0.0/1665.5k81/81
165.237.0.0/1665.5k81/81
67.48.224.0/198.2k81/81
204.235.112.0/212k81/81
204.235.120.0/2351281/81
165.237.14.0/2425681/81
165.237.15.0/2425681/81
192.219.231.0/2425681/81
204.29.131.0/2425681/81
2001:1998:2000::/36268M × /6464/64

Routing health

How AS3456'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

  • Valid100.0%16
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%16
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 9 prefixes

IPv6 — 7 prefixes

  • /36268M × /6428.6%2
  • /4865.5k × /6471.4%5

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS3456 started or stopped in this period.

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