AS8508 — SILWEB-AS-EDU SILWEB Autonomous System - Academic

Network type: education

AS8508 announces 8 IPv4 prefixes covering 160,000 addresses and 1 IPv6 prefixes.

About this network

SILWEB-AS-EDU is run by the Computer Centre of the Silesian University of Technology in Gliwice, which operates SILWEB — the academic metropolitan network serving the Upper Silesian conurbation. It is one of the regional MANs that connect into Poland's national research network, AS8501.

What it's used for

• Campus and inter-campus connectivity for the universities and cultural institutions of the Katowice–Gliwice agglomeration.
• About 160,000 addresses across fifteen prefixes, including two legacy /16s (155.158.0.0/16 and 157.158.0.0/16), plus three IPv6 /32s.

Notable

• rDNS is a roll-call of Silesian institutions rather than a single university: us.edu.pl (University of Silesia), ue.katowice.pl (University of Economics in Katowice), ath.bielsko.pl (University of Bielsko-Biała, behind NAT pools), asp.katowice.pl (Academy of Fine Arts) and bs.katowice.pl (the Silesian Library). That mix is the signature of an academic MAN operator, not of one campus.
• The addresses are institutional: servers, NAT gateways and campus hosts. There are no consumer subscriber pools, so despite the size this is not an eyeball network.

Interesting

• The two /16s are early-1990s allocations from 155/8 and 157/8, blocks widely handed to universities before RIR-era CIDR assignments — a hint of how early Polish academia got onto the internet.

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

Announced prefixes

• 83.230.64.0/20
• 83.230.96.0/19
• 91.220.103.0/24
• 155.158.0.0/16
• 157.158.0.0/16
• 212.106.176.0/20
• 213.227.80.0/20
• 213.227.96.0/19
• 2a01:1dc::/30

Upstream networks

• AS8501 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS6939 Hurricane Electric LLC
• AS15744 Silesian University of Technology, Computer Centre
• AS196844 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS3303 Swisscom (Schweiz) AG
• AS24482 SG.GS
• AS201054 Stowarzyszenie e-Poludnie

Adjacent networks

• AS8501 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS6939 Hurricane Electric LLC
• AS15744 Silesian University of Technology, Computer Centre
• AS196844 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS3303 Swisscom (Schweiz) AG
• AS24482 SG.GS
• AS201054 Stowarzyszenie e-Poludnie

Internet exchanges

• TPIX - Internet Exchange — Warsaw, Poland
• Thinx IX — Warsaw, Poland