AS204961 ON4-AS ON4 sp. z o.o.

ON4-AS ON4 sp. z o.o. · registered in Poland

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Poland#1,376largest network in PL by IPv4 space, of 2,091 · <0.01% of PL

Rank worldwide#62,168of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryPoland2,145 ASNs registered there

Open AS204961 in ASN lookup Look up an IP in this network (193.228.174.1) All networks in Poland

IPv4 prefixes

All 1 prefix, in address order.

193.228.174.0/24

IPv6 prefixes

All 1 prefix.

2001:678:1170::/48

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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