AS35174 — NFB-AS

AS35174 announces 4 IPv4 prefixes covering 7,424 addresses and 0 IPv6 prefixes.

About this network

The AS handle NFB-AS is held by Network For Business Sp z o.o.

What it's used for

• The address space carries a mix of corporate and institutional netnames, including CITYNET-NET for CityNet sp. z o.o., NFB-KRAKOW-PL for the holder, WIRTUALE-UTI for UTI.PL S.A., and WBP-KRK for the Wojewodzka Biblioteka Publiczna w Krakowie.
• With 7424 IPv4 addresses across 4 prefixes and only 2 observed neighbours, the ratio suggests an access or internal corporate network rather than a transit provider.

Notable

• Registrants vary across the announced prefixes, listing CityNet sp. z o.o., Network For Business Sp z o.o., UTI.PL S.A., and Wojewodzka Biblioteka Publiczna w Krakowie, indicating the AS aggregates space for multiple distinct entities.
• The inventory consists of four distinct IPv4 blocks with no IPv6 prefixes, showing a fragmented address estate typical of acquired or leased ranges.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 81.186.224.0/20
• 83.143.128.0/21
• 91.198.177.0/24
• 91.229.68.0/22

Upstream networks

• AS9141 P4 Sp. z o.o.
• AS42927 S-NET Sp. z o.o.

Adjacent networks

• AS9141 P4 Sp. z o.o.
• AS42927 S-NET Sp. z o.o.

Internet exchanges

• TPIX - Internet Exchange — Warsaw, Poland