Autonomous system
AS20609 KAZACZSRO
Unclassified RIPE
Summary
KAZA.cz s.r.o.
business czech ipv4 ipv6
The AS handle KAZACZSRO is operated by KAZA.cz s.r.o.
What it's used for
- The address space carries corporate infrastructure, evidenced by reverse DNS entries such as
ip-91-202-53-255.kaza.czandip-185-108-121-255.kaza.cz. - The network announces 2048 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with only 3 observed neighbours, indicating a small-scale internal or business network rather than a transit provider.
Notable
- Registrants for both IPv4 prefixes (
KAZA-CZ-2andCZ-KAZACZ-20150709) align with the announcer, KAZA.cz s.r.o. - The inventory consists of two /22 IPv4 blocks and a single /32 IPv6 block, representing a compact and self-contained address estate.
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 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 2.05K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS20609- Registry name
- kazaczsro
- Registrant
- cz-kazacz-1-mnt
- Abuse contact
- abuse@kaza.cz
- Registered
- 2015-08-07
- Last changed
- 2021-05-24
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 3 valid, 0 with no ROA
- ROAs
- 3 authorising AS20609
- ASPA
- no ASPA record
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 10 naming AS20609
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: 442 networks and 1,784 prefixes, as published 2026-10-19. 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