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AS195San Diego Supercomputer Center

United StatesRegistryARIN

As of 26th September 2026, AS195 (San Diego Supercomputer Center), a network registered in the United States with ARIN, originates 32 IPv4 prefixes covering 188k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 1,424th-largest of the 79,516 networks we see originating IPv4, and the 407th-largest of 18,424 in the United States. It is seen behind 4 upstream networks, most often AS2152 (CENIC - CalREN) and AS22773 (Cox Communications Inc.), and in front of 6 downstream networks. None of its announcements have a valid RPKI ROA. 65% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

32

IPv6 prefixes

2

IPv4 addresses

188k

IPv6 /64s

4.8B

Upstream graph

The networks AS195 is seen behind, one and two hops out, drawn from real AS paths.

AS195Toward the internet core
Upstream graph for AS195: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS195San Diego Superco…This networkAS293ESnetAS2152CENIC - CalRENAS2153CENICAS22773Cox Communication…AS6453TATA Communicatio…AS6939Hurricane Electri…AS3356Lumen (Level 3)AS1299Arelion (fka. Tel…AS3257GTT Communication…

Networks observed one and two hops upstream of AS195 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

21

adjacent networks

Upstreams
419%
Peers
1152%
Downstreams
629%

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

Upstreams of AS195
NetworkCountryRelationshipPathsVantage pts
AS2152CENIC - CalRENUSPeer2,690144
AS22773Cox Communications Inc.USPeer54581
AS293ESnetUSPeer371
AS2153CENICUSPeer252

Prefixes

All 34

The largest blocks AS195 originates, widest first.

Largest prefixes originated by AS195
PrefixAddressesVisibility
132.249.0.0/1665.5k81/81
153.105.0.0/1665.5k81/81
198.202.64.0/1816.4k2/81
198.202.96.0/198.2k2/81
198.202.64.0/204.1k81/81
198.202.80.0/204.1k81/81
198.202.96.0/204.1k81/81
198.202.112.0/204.1k81/81
199.165.16.0/204.1k81/81
67.58.56.0/212k2/81

Routing health

How AS195'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%34

Propagation

  • Globally propagated90% of full-feed peers or more64.7%22
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%35.3%12

Prefix sizes

IPv4 — 32 prefixes

IPv6 — 2 prefixes

  • /324.3B × /6450.0%1
  • /35537M × /6450.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS195 started or stopped in this period.

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