asn.dev

Autonomous system

AS35174 NFB-AS Network For Business Sp z o.o.

Unclassified RIPE

IPv4 addresses 7.42K 4 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly PL
Exchanges 1 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Network For Business

Poland · AI-generated

business telecom poland

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. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
TPIX - Internet ExchangeWarsaw, Poland195.149.232.145

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS9141P4 Sp. z o.o.140
AS42927S-NET Sp. z o.o.94

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-01, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 4 prefixes · 7.42K addresses IPv6 0 prefixes

CountryNamePrefixes
PLPoland4

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS35174
Registry name
NFB-AS
Registrant
DMTEC-MNT
Abuse contact
jaroslaw.swierad@nfb.pl
Registered
2005-06-16
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 4 with no ROA
ROAs
0 authorising AS35174
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
4 naming AS35174

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 447 networks and 1,843 prefixes, as published 2026-11-02. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check