AS39603 P4NET P4 Sp. z o.o.

P4NET P4 Sp. z o.o. · registered in Poland

IPv4 addresses565,2489 prefixes · 0.018% of announced IPv4

Rank in Poland#7largest network in PL by IPv4 space, of 2,091 · 2.99% of PL

Rank worldwide#527of 79,396 networks with IPv4

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

CountryPoland2,145 ASNs registered there

Open AS39603 in ASN lookup Look up an IP in this network (5.173.0.1) All networks in Poland

IPv4 prefixes

All 9 prefixes, in address order.

5.173.0.0/17
5.173.128.0/18
5.173.192.0/19
31.174.0.0/15
46.112.0.0/15
89.108.192.0/18
94.254.128.0/17
109.243.0.0/16
164.126.0.0/15

IPv6 prefixes

All 1 prefix.

2a00:1981::/32

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ASNNameIPv4 addresses

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AS8374#8 PLUSNET Polkomtel Sp. z o.o.422,400

AS8308#9 NASK-COMMERCIAL NAUKOWA I AKADEMICKA SIEC KOMPUTEROWA - PANSTWOWY INSTYTUT BADAWCZY260,352

AS20960#10 TKTELEKOM-AS TK Telekom sp. z o.o.233,216

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