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AS2153CENIC

United StatesRegistryARIN

As of 10th November 2026, AS2153 (CENIC), a network registered in the United States with ARIN, originates 12 IPv4 prefixes covering 3.6k addresses. By IPv4 address space that makes it the 19,320th-largest of the 80,733 networks we see originating IPv4, and the 5,306th-largest of 18,751 in the United States. It is seen behind 4 upstream networks, most often AS2152 (CENIC - CalREN) and AS293 (ESnet), and in front of 40 downstream networks. 58% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 0% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

12

IPv6 prefixes

0

IPv4 addresses

3.6k

IPv6 /64s

0

Upstream graph

The networks AS2153 is seen behind, one and two hops out, drawn from real AS paths.

AS2153Toward the internet core
Upstream graph for AS2153: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS2153CENICThis networkAS195San Diego Superco…AS293ESnetAS2152CENIC - CalRENAS7575Australian Academ…AS22773Cox Communication…AS6939Hurricane Electri…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS2153 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

87

adjacent networks

Upstreams
45%
Peers
4349%
Downstreams
4046%

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

Upstreams of AS2153
NetworkCountryRelationshipPathsVantage pts
AS2152CENIC - CalRENUSPeer16,95063
AS293ESnetUSPeer1,4651
AS7575Australian Academic and Research Network (AARNet)AUPeer7211
AS195San Diego Supercomputer CenterUSPeer3939

Prefixes

The largest blocks AS2153 originates, widest first.

Largest prefixes originated by AS2153
PrefixAddressesVisibility
130.150.12.0/235121/76
137.164.26.0/235121/76
132.241.61.0/242561/76
136.168.238.0/242562/76
137.150.137.0/242562/76
137.164.17.0/242561/76
137.164.25.0/242561/76
137.164.28.0/242561/76
139.182.103.0/242562/76
205.154.51.0/242561/76

Routing health

How AS2153'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

  • Valid58.3%7
  • Invalid0.0%0
  • No ROA41.7%5

Propagation

  • Globally propagated90% of full-feed peers or more0.0%0
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%100.0%12

Prefix sizes

IPv4 — 12 prefixes

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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