subnet.im

AS33363Charter Communications, Inc

United StatesRegistryARINTypeEyeball

As of 26th September 2026, AS33363 (Charter Communications, Inc), an access network registered in the United States with ARIN, originates 441 IPv4 prefixes covering 6.3M addresses and 61 IPv6 prefixes. By IPv4 address space that makes it the 116th-largest of the 79,516 networks we see originating IPv4, and the 35th-largest of 18,424 in the United States. It is seen behind 1 upstream network, most often AS7843 (Spectrum (Charter)), and in front of 69 downstream networks. 87% of its announcements have a valid RPKI ROA; 57 are RPKI-invalid. 89% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

441

IPv6 prefixes

61

IPv4 addresses

6.3M

IPv6 /64s

91.1B

Upstream graph

The networks AS33363 is seen behind, one and two hops out, drawn from real AS paths.

AS33363Toward the internet core
Upstream graph for AS33363: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS33363Charter Communica…This networkAS7843Spectrum (Charter)AS1299Arelion (fka. Tel…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS33363 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

140

adjacent networks

Upstreams
11%
Peers
7050%
Downstreams
6949%

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

Upstreams of AS33363
NetworkCountryRelationshipPathsVantage pts
AS7843Spectrum (Charter)USPeer45,671145

Prefixes

All 502

The largest blocks AS33363 originates, widest first.

Largest prefixes originated by AS33363
PrefixAddressesVisibility
35.136.0.0/13524k80/81
72.184.0.0/14262k81/81
97.100.0.0/14262k81/81
108.188.0.0/14262k81/81
173.168.0.0/14262k81/81
50.88.0.0/15131k81/81
65.32.0.0/15131k81/81
68.204.0.0/15131k81/81
70.126.0.0/15131k81/81
72.188.0.0/15131k81/81

Routing health

How AS33363'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

  • Valid87.1%437
  • Invalid11.4%57
  • No ROA1.6%8

Propagation

  • Globally propagated90% of full-feed peers or more88.6%445
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%11.4%57

Prefix sizes

IPv4 — 441 prefixes

IPv6 — 61 prefixes

  • /318.6B × /641.6%1
  • /324.3B × /6431.1%19
  • /36268M × /644.9%3
  • /4016.8M × /6411.5%7
  • /441M × /648.2%5
  • /4865.5k × /6442.6%26

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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