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AS4

University of Southern California
Announced prefixes
28
Upstreams
8
Peers
4
Downstreams
3

Adjacent ASNs

UpstreamDownstreamAS174AS174AS226AS226AS567AS567AS10886AS10886AS30844AS30844AS52493AS52493AS266306AS266306AS266674AS266674AS2635AS2635AS139451AS139451AS274709AS2747094 peer ASNs (exchange traffic as equals, not a hierarchy)Peers ×4AS4

Neighbor nodes aren't clickable. To look up an ASN, use the ASN lookup page

All Neighbor ASNs

Upstream8

Buys transit from them

  • AS174
  • AS226
  • AS567
  • AS10886
  • AS30844
  • AS52493
  • AS266306
  • AS266674

Peer4

Settlement-free traffic exchange

  • AS52562
  • AS58821
  • AS133296
  • AS400215

Downstream3

Buys transit from this AS

  • AS2635
  • AS139451
  • AS274709

Recent Prefix Changes

latest 12

IP prefixes this ASN started or stopped announcing (derived by diffing successive data syncs).

  • Withdrawn193.7.185.0/242026-08-15
  • Announced193.7.185.0/242026-08-14
  • Announced170.79.218.0/232026-08-14
  • Withdrawn170.79.218.0/232026-08-13
  • Withdrawn45.228.73.0/242026-08-11
  • Withdrawn45.228.74.0/232026-08-11
  • Announced45.228.73.0/242026-08-11
  • Announced45.228.74.0/232026-08-11
  • Withdrawn45.228.73.0/242026-08-10
  • Withdrawn45.228.74.0/232026-08-10
  • Announced45.228.75.0/242026-07-21
  • Withdrawn45.228.75.0/242026-07-20

Data: local · Updated 2026-09-04 09:53:00