AS8508 SILWEB-AS-EDU Silesian University of Technology, Computer Centre

SILWEB-AS-EDU Silesian University of Technology, Computer Centre · registered in Poland

IPv4 addresses160,00015 prefixes · 0.005% of announced IPv4

Rank in Poland#13largest network in PL by IPv4 space, of 2,091 · 0.85% of PL

Rank worldwide#1,264of 79,396 networks with IPv4

IPv63 x /32 (196,608 x /48)2 prefixes

CountryPoland2,145 ASNs registered there

Open AS8508 in ASN lookup Look up an IP in this network (83.230.64.1) All networks in Poland

IPv4 prefixes

All 15 prefixes, in address order.

83.230.64.0/20
83.230.96.0/22
83.230.100.0/22
83.230.104.0/22
83.230.108.0/23
83.230.110.0/24
83.230.111.0/24
83.230.112.0/21
83.230.120.0/21
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

IPv6 prefixes

All 2 prefixes.

2a01:1dc::/31
2a01:1de::/32

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AS31242#16 TKPSA-AS P4 Sp. z o.o.113,664

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources