asn.dev

Autonomous system

AS12344 CZECHITC CZECH IT CLUSTER, druzstvo

Unclassified RIPE

IPv4 addresses 1.02K 1 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly CZ
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Czech IT Cluster

Czechia · AI-generated

hosting datacenter legacy

A Czech cooperative of IT companies, running shared datacentre space for its members.

What it's used for

  • Datacentre hosting. One /22 of 1,024 addresses, one IPv6 /31, two observed BGP neighbours.

Notable

  • Every sampled reverse name begins datacenter-, under czech-itc.cz, and the broadcast address of one subnet answers as datacenter-broadcast.czech-itc.cz.
  • The IPv4 block is registered as CZ-CZECHITC-20150930, and the AS was first seen in the routing data five weeks later.
  • The IPv6 allocation is a /31 — larger than the /32 a provider is normally issued, and an odd size to hold.

Interesting

  • "Družstvo" in the registered name is the Czech legal form for a cooperative, and it changes how this network should be read. The members are competitors who agreed to share infrastructure, so the address space belongs to all of them and to none of them individually, and the AS is a piece of joint plant rather than one company's network.
  • A /31 is 2^97 addresses. Nothing about the IPv4 side of this network — a single /22, two neighbours, one datacentre — suggests a need on that scale, which is a fair summary of how IPv6 allocation works: the smallest useful unit is already far past sufficient.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 4 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS6855Slovak Telekom, a.s.88
AS16019Vodafone Czech Republic a.s.5

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-02, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 1.02K addresses IPv6 1 prefixes

CountryNamePrefixes
CZCzechia2

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS12344
Registry name
CZECHITC
Registrant
cz-czechitc-1-mnt
Abuse contact
info@czech-itc.cz
Registered
2015-09-30
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 2 valid, 0 with no ROA
ROAs
2 authorising AS12344
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS12344

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: 448 networks and 1,851 prefixes, as published 2026-11-03. 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

Cross-check