AS2153CENIC
United StatesRegistryARINAs of 26th September 2026, AS2153 (CENIC), a network registered in the United States with ARIN, originates 11 IPv4 prefixes covering 3.3k addresses. By IPv4 address space that makes it the 19,533rd-largest of the 79,516 networks we see originating IPv4, and the 5,366th-largest of 18,424 in the United States. It is seen behind 5 upstream networks, most often AS2152 (CENIC - CalREN) and AS293 (ESnet), and in front of 42 downstream networks. 64% 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
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS2153 is seen behind, one and two hops out, drawn from real AS paths.
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
91
adjacent networks
- Upstreams
- 55%
- Peers
- 4448%
- Downstreams
- 4246%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS2152CENIC - CalREN | US | Peer | 16,889 | 64 |
| AS293ESnet | US | Peer | 1,291 | 1 |
| AS7575Australian Academic and Research Network (AARNet) |  AU | Peer | 695 | 1 |
| AS195San Diego Supercomputer Center | US | Peer | 39 | 39 |
| AS2907Science Information Network |  JP | Peer | 2 | 1 |
Prefixes
The largest blocks AS2153 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 130.150.12.0/23 | 512 | 1/81 |
| 137.164.26.0/23 | 512 | 1/81 |
| 132.241.61.0/24 | 256 | 1/81 |
| 136.168.238.0/24 | 256 | 2/81 |
| 137.150.137.0/24 | 256 | 2/81 |
| 137.164.17.0/24 | 256 | 1/81 |
| 137.164.25.0/24 | 256 | 1/81 |
| 137.164.28.0/24 | 256 | 1/81 |
| 205.154.51.0/24 | 256 | 1/81 |
| 209.129.60.0/24 | 256 | 1/81 |
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
- Valid63.6%7
- Invalid0.0%0
- No ROA36.4%4
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%11
Prefix sizes
IPv4 — 11 prefixes
Recent changes
Announcements that started or stopped since 27th Aug 2026.
No announcement by AS2153 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.