Autonomous system detail

AS52

Announced

Operated by UCLA - University of California, Los Angeles.

Summary

// analyst note
Live university network reached via CENIC; benign. Of historical note as the birthplace of the ARPANET.
// security note
NEUTRAL/DATED: no notable public abuse signal found as of 2026-06-08; benign academic network.
IPv4 prefixes
10
~329.0K addresses
IPv6 prefixes
1
announced
Peer networks
2
2 up · 0 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: High

AS52 is a legacy allocation registered under ARIN to the University of California, Los Angeles (OrgId UCLA), and it remains a live campus network. As of June 2026 it originates 14 prefixes (12 IPv4 and 2 IPv6; ~329,216 IPv4 addresses), including 128.97.0.0/16, 131.179.0.0/16, 149.142.0.0/16, 164.67.0.0/16, 169.232.0.0/16, and IPv6 2607:f010::/32, with peers/upstreams AS2152 and AS2153 (both CENIC, the California research-and-education backbone); its imports also reference AS11422. RPKI shows 0 valid and 0 invalid. The ARIN ASN RegDate is 1985-10-24 (autnum updated 1998-07-08). Of deep historical note, UCLA was the birthplace of the ARPANET — the first Interface Message Processor was installed in early September 1969, and the first ARPANET host-to-host message was sent at 10:30 p.m. PST on October 29, 1969, from Boelter Hall Room 3420 to SRI — though the AS number itself dates only to 1985. For triage this is a live university network reached via CENIC, carrying benign traffic. No notable public abuse signal was found as of June 2026.

Operator
University of California, Los Angeles (ARIN OrgId UCLA) [Confirmed] — ARIN RDAP
Country / RIR
US, ARIN [Confirmed]
Allocated
ARIN ASN RegDate 1985-10-24 (autnum updated 1998-07-08) [Confirmed]
Org status
active — ucla.edu

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-08; benign academic network — bgp.he.net

Network & routing

Network type
research / education [Confirmed]
Size
14 prefixes (12 IPv4, 2 IPv6; ~329,216 IPv4 addrs); incl. 128.97.0.0/16, 131.179.0.0/16, 149.142.0.0/16, 164.67.0.0/16, 169.232.0.0/16, 2607:f010::/32 — bgp.he.net (2026-06)
Routing/peering
actively announcing; peers/upstreams AS2152 + AS2153 (CENIC); imports reference AS11422 — bgp.he.net
RPKI
0 valid, 0 invalid [Confirmed] — bgp.he.net
Notable usage
UCLA campus network. [historical] birthplace of the ARPANET — first IMP Sept 1969; first host-to-host message 1969-10-29 from Boelter Hall 3420 to SRI (AS number itself dates only to 1985) — ucla.edu
Related ASNs
AS2152/AS2153 (CENIC — upstream) [Confirmed]
Analyst note
Live university network reached via CENIC; benign. Of historical note as the birthplace of the ARPANET.
[ 02 ] — Announced prefixes

What this network routes.

11 prefixes total · RIPEstat data · cached, not real-time
// IPv4 prefixes10
  1. 131.179.0.0/16/16
  2. 149.142.0.0/16/16
  3. 164.67.0.0/16/16
  4. 169.232.0.0/16/16
  5. 128.97.0.0/16/16
  6. 216.41.228.0/24/24
  7. 192.35.226.0/24/24
  8. 192.35.221.0/24/24
  9. 192.154.2.0/24/24
  10. 192.35.225.0/24/24
// IPv6 prefixes1
  1. 2607:f010::/32/32
[ 03 ] — Notable peers & upstreams

Who it talks to.

2 observed neighbours
// Notable connectionsTop 2 of 2
ASNOperatorRole
AS2152 CENIC-2152 - CENIC upstream
AS2153 CENIC-2153 - CENIC upstream
Neighbours observed via public BGP collectors; not a complete peering list.