asn.dev

Autonomous system

AS39736 ICTSUPPORT

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

ICT Support

Czechia · AI-generated

business telecom czech

ICTSUPPORT is operated by ICT Support, s.r.o.

What it's used for

  • The address space carries corporate and telecom infrastructure, evidenced by the netname CZ-ICTSUPPORT-20171027 and the registrant ICT Support, s.r.o.
  • The AS announces 1024 IPv4 addresses and 1 IPv6 prefix, with only 2 observed neighbours, indicating a small-scale internal or access network rather than a transit provider
  • Traffic consists of data for the company's own operations, including microwave links, structured cabling, and IP telephony services provided to its clients

Notable

  • The registrant ICT Support, s.r.o. matches the AS holder, confirming consistent ownership of the address space
  • The address inventory is compact, consisting of a single IPv4 block 185.228.164.0/22 and one IPv6 prefix 2a0d:2600::/29

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 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS16246O2 Czech Republic, a.s.74
AS209810Netcore services s.r.o.57

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, 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
AS39736
Registry name
ICTSUPPORT
Registrant
cz-ictsupport-1-mnt
Abuse contact
ict-ripencc-abuse@cdipraha.cz
Registered
2017-10-27
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 4 valid, 0 with no ROA
ROAs
2 authorising AS39736
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
4 naming AS39736

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 1,849 prefixes, as published 2026-10-29. 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