subnet.im

AS52University of California, Los Angeles

United StatesRegistryARIN

As of 24th October 2026, AS52 (University of California, Los Angeles), a network registered in the United States with ARIN, originates 10 IPv4 prefixes covering 329k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 922nd-largest of the 79,671 networks we see originating IPv4, and the 237th-largest of 18,487 in the United States. It is seen behind 2 upstream networks, most often AS2152 (CENIC - CalREN) and AS2153 (CENIC). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

10

IPv6 prefixes

1

IPv4 addresses

329k

IPv6 /64s

4.3B

Upstream graph

The networks AS52 is seen behind, one and two hops out, drawn from real AS paths.

AS52Toward the internet core
Upstream graph for AS52: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS52University of Cal…This networkAS2152CENIC - CalRENAS2153CENICAS3356Lumen (Level 3)AS6939Hurricane Electri…AS293ESnet

Networks observed one and two hops upstream of AS52 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 AS52
NetworkCountryRelationshipPathsVantage pts
AS2152CENIC - CalRENUSPeer812137
AS2153CENICUSPeer101

Prefixes

The largest blocks AS52 originates, widest first.

Largest prefixes originated by AS52
PrefixAddressesVisibility
128.97.0.0/1665.5k76/76
131.179.0.0/1665.5k76/76
149.142.0.0/1665.5k76/76
164.67.0.0/1665.5k76/76
169.232.0.0/1665.5k76/76
192.35.221.0/2425676/76
192.35.225.0/2425676/76
192.35.226.0/2425676/76
192.154.2.0/2425676/76
216.41.228.0/2425676/76

Routing health

How AS52'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%11

Propagation

  • Globally propagated90% of full-feed peers or more100.0%11
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 10 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 24th Sept 2026.

No announcement by AS52 started or stopped in this period.

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