Autonomous system
AS39761 ABAK
Unclassified RIPE
Summary
ABAK
isp residential czech
The AS handle ABAK is held by ABAK, Co.Ltd.
What it's used for
- The address space carries residential broadband traffic, evidenced by reverse DNS entries pointing to
ujezd.net(e.g.,unassigned-81-90-247-255.ujezd.net). - The network announces 10,240 IPv4 addresses across 6 prefixes and 2 IPv6 prefixes, with only 3 observed neighbours, indicating a local access provider rather than a transit hub.
- Traffic consists of subscriber eyeballs for residential internet access in the Czech Republic.
Notable
- All registrants for the announced prefixes are listed as
ABAK, Co.Ltd., matching the AS holder. - The address inventory includes blocks allocated in 2006, 2009, and 2019, showing gradual expansion of the network.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 6 prefixes · 10.24K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 8 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS39761- Registry name
- ABAK
- Registrant
- MNT-ABAK
- Abuse contact
- jan.pilny@abak.cz
- Registered
- 2006-04-21
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 8 valid, 0 with no ROA
- ROAs
- 8 authorising AS39761
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 49 naming AS39761
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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