Autonomous system
AS42763 CZAJEN
Residential RIPE
Summary
Czajen
isp residential regional cable
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-CZAJENacross 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Warsaw | Warsaw, Poland | 195.182.219.46 |
| Thinx IX | Warsaw, Poland | 212.91.0.129 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 3.58K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS42763- Registry name
- CZAJEN
- Registrant
- AP-MEDIA-MNT
- Abuse contact
- abuse@czajen.pl
- Registered
- 2007-04-12
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 17 valid, 0 with no ROA
- ROAs
- 3 authorising AS42763
- ASPA
- no ASPA record
- IRR
- 100% registered · 17 of 17 announcements
- Route objects
- 17 naming AS42763
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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