AS15744 SILWEB-AS-COM Silesian University of Technology, Computer Centre

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

IPv4 addresses20,22415 prefixes · <0.001% of announced IPv4

Rank in Poland#78largest network in PL by IPv4 space, of 2,091 · 0.11% of PL

Rank worldwide#6,114of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryPoland2,145 ASNs registered there

Open AS15744 in ASN lookup Look up an IP in this network (83.230.52.1) All networks in Poland

IPv4 prefixes

All 15 prefixes, in address order.

83.230.52.0/22
83.230.56.0/21
83.230.80.0/21
83.230.88.0/22
83.230.92.0/23
83.230.95.0/24
195.82.174.0/23
195.82.184.0/22
212.106.128.0/21
212.106.136.0/23
212.106.140.0/22
212.106.144.0/20
212.106.168.0/21
213.227.64.0/22
213.227.76.0/22

IPv6 prefixes

All 1 prefix.

2a01:1df::/32

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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