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AS39603

AS39603 is P4 Sp. z o.o..

Last updated 3 Nov 2026 from DB-IP ASN Lite (2026-11-01) and RIR statistics (4 Nov 2026)

Short answer

AS39603 belongs to P4 Sp. z o.o.. DB-IP Lite attributes 565,248 IPv4 addresses in 7 ranges and 1 IPv6 ranges to it, all or nearly all of the IPv4 space in Poland. The number is registered with RIPE NCC in Poland on 24 Mar 2006.

Facts for AS39603
Operator (DB-IP)P4 Sp. z o.o.
IPv4 addresses565,248
IPv4 ranges7
IPv6 ranges1
RegistryRIPE NCC
Registered24 Mar 2006
Registry countryPoland (PL)

Does it publish a geofeed?

We haven’t checked this network’s registry records for a geofeed yet. The Truth Check looks for one live for any address you test.

Shared addresses (CGNAT)

P4 Sp. z o.o. hasn’t been documented as using carrier-grade NAT in a source we could check. To see whether your own connection is behind it, compare your router’s address on the CGNAT check.

IPv6

DB-IP lists 1 IPv6 ranges for AS39603, so customers can get IPv6 addresses, which databases place separately from IPv4.

Where its IPv4 space is used, according to DB-IP

PL100%

Share of the network’s IPv4 addresses by DB-IP Country Lite. IP Geolocation by DB-IP.

IP ranges

RangeAs CIDRAddresses
5.173.0.0 – 5.173.223.2555.173.0.0/17, 5.173.128.0/18 …57,344
31.174.0.0 – 31.175.255.25531.174.0.0/15131,072
46.112.0.0 – 46.113.255.25546.112.0.0/15131,072
89.108.192.0 – 89.108.255.25589.108.192.0/1816,384
94.254.128.0 – 94.254.255.25594.254.128.0/1732,768
109.243.0.0 – 109.243.255.255109.243.0.0/1665,536
164.126.0.0 – 164.127.255.255164.126.0.0/15131,072
2a00:1981:: – 2a00:1981:ffff:ffff:ffff:ffff:ffff:ffff2a00:1981::/32IPv6
Showing 7 of 7 IPv4 and 1 of 1 IPv6 ranges All ranges (CSV)

IP Geolocation by DB-IP, ASN Lite, CC BY 4.0.

Using an address from this network? See which sources agree on where it is.

Sources

  1. DB-IP IP to ASN Lite (CC BY 4.0) · checked 3 Nov 2026
  2. NRO RIR delegated-extended statistics · checked 5 Nov 2026