subnet.im

AS5050Pittsburgh Supercomputing Center

United StatesRegistryARIN

As of 22nd October 2026, AS5050 (Pittsburgh Supercomputing Center), a network registered in the United States with ARIN, originates 17 IPv4 prefixes covering 81.2k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 2,743rd-largest of the 79,663 networks we see originating IPv4, and the 883rd-largest of 18,476 in the United States. It is seen behind 6 upstream networks, most often AS174 (Cogent Communications, LLC) and AS3356 (Lumen (Level 3)), and in front of 14 downstream networks. 68% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

17

IPv6 prefixes

2

IPv4 addresses

81.2k

IPv6 /64s

4.3B

Upstream graph

The networks AS5050 is seen behind, one and two hops out, drawn from real AS paths.

AS5050Toward the internet core
Upstream graph for AS5050: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS5050Pittsburgh Superc…This networkAS174Cogent Communicat…AS293ESnetAS3356Lumen (Level 3)AS6939Hurricane Electri…AS11164Internet2 I2PXAS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS20130Depaul UniversityAS2152CENIC - CalRENAS2497Internet Initiati…

Networks observed one and two hops upstream of AS5050 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

43

adjacent networks

Upstreams
614%
Peers
2353%
Downstreams
1433%

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

Upstreams of AS5050
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer1,46791
AS3356Lumen (Level 3)USPeer36379
AS11164Internet2 I2PXUSPeer33726
AS6939Hurricane Electric LLCUSPeer32132
AS293ESnetUSPeer551
AS11537Internet2USPeer472

Prefixes

The largest blocks AS5050 originates, widest first.

Largest prefixes originated by AS5050
PrefixAddressesVisibility
147.73.0.0/1665.5k76/77
104.128.208.0/204.1k76/77
147.73.16.0/204.1k77/77
167.88.240.0/204.1k76/77
147.72.249.0/2425676/77
147.73.0.0/2425676/77
147.73.3.0/2425676/77
147.73.4.0/2425676/77
147.73.5.0/242562/77
147.73.6.0/2425676/77

Routing health

How AS5050'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

  • Valid68.4%13
  • Invalid0.0%0
  • No ROA31.6%6

Propagation

  • Globally propagated90% of full-feed peers or more94.7%18
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%5.3%1

Prefix sizes

IPv4 — 17 prefixes

IPv6 — 2 prefixes

  • /324.3B × /6450.0%1
  • /4865.5k × /6450.0%1

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

No announcement by AS5050 started or stopped in this period.

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