AS42763 — CZAJEN FPUH Czajen Krzysztof Czaja

Network type: residential

AS42763 announces 3 IPv4 prefixes covering 3,584 addresses and 0 IPv6 prefixes.

About this network

The AS handle CZAJEN is held by FPUH Czajen Krzysztof Czaja.

What it's used for

• The address space carries residential and business internet access, evidenced by the netname PL-CZAJEN across all announced prefixes.
• The network announces 3584 IPv4 addresses across 3 prefixes and maintains 11 observed neighbours, a ratio consistent with a regional access provider rather than a transit carrier.
• Traffic from this AS consists of subscriber eyeballs for cable and DSL users in the regional market served by the operator.

Notable

• All registrants for the announced prefixes are FPUH Czajen Krzysztof Czaja, matching the AS holder and confirming direct ownership of the address space.
• The inventory consists of three distinct IPv4 blocks: 77.87.0.0/21, 91.193.120.0/22, and 193.33.174.0/23, all located in Poland.

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

Announced prefixes

• 77.87.0.0/21
• 91.193.120.0/22
• 193.33.174.0/23

Upstream networks

• AS12912 T-Mobile Polska S.A.
• AS6939 Hurricane Electric LLC
• AS202520 SkyPass Solutions Sp. z o.o.
• AS198424 HLG Internet Sp. z o.o.
• AS24482 SG.GS

Downstream networks

• AS43326 Fundacja Nasza Wizja

Adjacent networks

• AS12912 T-Mobile Polska S.A.
• AS6939 Hurricane Electric LLC
• AS202520 SkyPass Solutions Sp. z o.o.
• AS43326 Fundacja Nasza Wizja
• AS198424 HLG Internet Sp. z o.o.
• AS24482 SG.GS

Routing security

• RPKI: 17 valid, 0 invalid and 0 not-found announcements; 3 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 17 route objects.
• Listed in as-sets: AS-ACCKRK, AS-CPOP, AS-GHNET, AS-HLG, AS-IPARTNERS, AS-KIKE-LOCAL, AS-MULTIMEDIA, AS-PLIX-CONNECTED, AS-RETN-ACTUAL-V4, AS-SET-52195, AS-TPIX, AS202520:AS-CLIENTS, AS21021:AS-MULTIMEDIA-D-CIX, AS21021:AS-MULTIMEDIA-LEVEL3, AS21021:AS-MULTIMEDIA-TPSA-WA-WA, AS24748:AS-IX, AS24748:AS-THINX, AS29535:AS-MIX2, AS29535:AS-TPIX, AS30778:AS-CUSTOMERS, AS42763:AS-CZAJEN-TRANSIT, AS43326:AS-AEGIS, AS5617:AS-WORLD-TRANSIT, AS8246:AS-TPNET, AS8308:AS-CUST-TRANSIT.

Internet exchanges

• Equinix Internet Exchange Warsaw — Warsaw, Poland
• Thinx IX — Warsaw, Poland