AS5050 — PSC-EXT

Network type: education

AS5050 announces 9 IPv4 prefixes covering 58,880 addresses and 2 IPv6 prefixes.

About this network

PSC-EXT — the external-facing network of the Pittsburgh Supercomputing Center (PSC), a high-performance computing and networking center founded in 1986 as a joint effort of Carnegie Mellon University and the University of Pittsburgh.

What it's used for

• Connecting PSC's supercomputing systems and their research users to the wider internet.
• Serving 3ROX, the Three Rivers Optical Exchange — the regional aggregation point PSC operates for research and education sites across western and central Pennsylvania and West Virginia. Members include Carnegie Mellon, Penn State, the University of Pittsburgh, West Virginia University, and WVNet.

Notable

• Research-and-education address space: about 59,000 addresses supporting scientific computing and a regional REN, not commercial customers.
• 3ROX carries both commodity internet and research paths, including a 100 Gbps connection to Internet2.
• Its parent institution Carnegie Mellon holds the single-digit AS9.

Interesting

• PSC was one of the original five NSF supercomputing centers, the program that seeded NSFNET and, with it, much of the early commodity internet. ARIN registered AS5050 in 1995.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 104.128.208.0/20
• 147.72.249.0/24
• 147.73.0.0/17
• 147.73.128.0/18
• 167.88.240.0/20
• 192.70.222.0/24
• 192.88.114.0/23
• 192.112.102.0/24
• 192.231.244.0/24
• 2001:5e8::/32
• 2620:72:4000::/48

Upstream networks

• AS174 Cogent Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS6939 Hurricane Electric LLC
• AS11164 Internet2
• AS11537 Internet2
• AS293 ESnet

Downstream networks

• AS7925 West Virginia Network for Educational Telecomputing
• AS1207 Pittsburgh Supercomputing Center
• AS1206 Pittsburgh Supercomputing Center
• AS23102 Robert Morris University
• AS36407 Software Engineering Institute
• AS3783 Allegheny Intermediate Unit
• AS19281 Quad9
• AS4130 University of Pittsburgh
• AS9 Carnegie Mellon University
• AS12118 West Virginia University
• AS18572 Beaver Valley Intermediate Unit #27
• AS63472 eiNetwork
• AS11009 Carlow University
• AS27604 Seton Hill University

Adjacent networks

• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS11537 Internet2
• AS7925 West Virginia Network for Educational Telecomputing
• AS11164 Internet2
• AS1207 Pittsburgh Supercomputing Center
• AS1206 Pittsburgh Supercomputing Center
• AS23102 Robert Morris University
• AS3783 Allegheny Intermediate Unit
• AS36407 Software Engineering Institute
• AS19281 Quad9
• AS293 ESnet
• AS4130 University of Pittsburgh
• AS9 Carnegie Mellon University
• AS12118 West Virginia University
• AS18572 Beaver Valley Intermediate Unit #27
• AS63472 eiNetwork
• AS11009 Carlow University
• AS27604 Seton Hill University

Internet exchanges

• Pittsburgh Internet Exchange — Pittsburgh, United States