AS197480 — SerczerNET SerczerNET Malgorzata Nienaltowska

AS197480 announces 2 IPv4 prefixes covering 3,072 addresses and 0 IPv6 prefixes.

About this network

The AS handle is SERCZERNET and the holder is SerczerNET Malgorzata Nienaltowska.

What it's used for

• The address space carries residential subscriber traffic, evidenced by reverse DNS entries such as static-user-178-21-141-254.serczer.pl and static-user-185-3-226-254.serczer.pl.
• The network announces 3072 IPv4 addresses across 2 prefixes and maintains 11 observed neighbours, a ratio consistent with a local access provider rather than a transit carrier.
• Traffic from this AS consists of cable and DSL subscriber eyeballs, as indicated by the operator's classification as a Cable/DSL/ISP and the static-user naming convention in the reverse DNS.

Notable

• Both announced prefixes, 178.21.136.0/21 and 185.3.224.0/22, list SerczerNET Malgorzata Nienaltowska as the registrant, matching the AS holder.
• The address inventory is composed of two distinct IPv4 blocks, with no IPv6 prefixes currently announced.

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

Announced prefixes

• 178.21.136.0/21
• 185.3.224.0/22

Upstream networks

• AS29414 Politechnika Bialostocka
• AS6939 Hurricane Electric LLC
• AS24482 SG.GS
• AS33891 Core-Backbone GmbH

Adjacent networks

• AS29414 Politechnika Bialostocka
• AS6939 Hurricane Electric LLC
• AS24482 SG.GS
• AS33891 Core-Backbone GmbH

Routing security

• RPKI: 2 valid, 0 invalid and 0 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 3 route objects.
• Listed in as-sets: AS-FONE-ALL, AS-PLIX, AS-PLIX-CONNECTED, AS-TPIX, AS29414:AS-BIALYSTOK-COM-AMSIX, AS29414:AS-BIALYSTOK-COM-PCWS, AS29414:AS-BIALYSTOK-COM-PIONIER-TP, AS29535:AS-TPIX, AS5617:AS-PL, AS5617:AS-WORLD-TRANSIT, AS8865:AS-BIALYSTOK, AS8865:AS-BIALYSTOK-1014, AS8865:AS-PEERS, AS9112:AS-POZMAN-1014.

Internet exchanges

• TPIX - Internet Exchange — Warsaw, Poland
• Equinix Internet Exchange Warsaw — Warsaw, Poland