AS8508 SILWEB-AS-EDU SILWEB Autonomous System - Academic

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](https://asn.ipinfo.app/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.