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AS1207Pittsburgh Supercomputing Center

United StatesRegistryARIN

As of 23rd October 2026, AS1207 (Pittsburgh Supercomputing Center), a network registered in the United States with ARIN, originates 3 IPv4 prefixes covering 33k addresses. By IPv4 address space that makes it the 5,394th-largest of the 79,663 networks we see originating IPv4, and the 1,849th-largest of 18,476 in the United States. It is seen behind 1 upstream network, most often AS5050 (Pittsburgh Supercomputing Center). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

3

IPv6 prefixes

0

IPv4 addresses

33k

IPv6 /64s

0

Upstream graph

The networks AS1207 is seen behind, one and two hops out, drawn from real AS paths.

AS1207Toward the internet core
Upstream graph for AS1207: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1207Pittsburgh Superc…This networkAS5050Pittsburgh Superc…AS174Cogent Communicat…AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS1207 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS1207
NetworkCountryRelationshipPathsVantage pts
AS5050Pittsburgh Supercomputing CenterUSPeer22876

Prefixes

The largest blocks AS1207 originates, widest first.

Largest prefixes originated by AS1207
PrefixAddressesVisibility
128.182.64.0/1816.4k76/77
147.73.192.0/1816.4k76/77
192.231.243.0/2425676/77

Routing health

How AS1207'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

  • Valid100.0%3
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS1207 started or stopped in this period.

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