asn.dev

Autonomous system

AS204383 CZ-SPCOM-AS

Unclassified APNIC

IPv4 addresses 11.26K 19 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly CZ
Exchanges 0 recorded by PCH
Upstreams 1 1 downstream
Flagged prefixes 0 none

Summary

SPCom s.r.o.

Czechia · AI-generated

business czech smart-building

The AS handle CZ-SPCOM-AS is held by SPCom s.r.o.

What it's used for

  • The address space carries corporate infrastructure, with netnames such as SPCOM-CASA and CZ-SPCOM-20180321 indicating internal segmentation.
  • The AS announces 11,264 IPv4 addresses across 19 prefixes and 1 IPv6 prefix, while maintaining only 2 observed neighbours, a ratio consistent with a small, self-contained business network rather than a transit or access provider.
  • As a smart building specialist in Hradec Králové, the traffic consists of office workers, building management systems, and internal IT endpoints.

Notable

  • Registrants include SPCom s.r.o. and Casablanca INT a.s., with the latter managing several prefixes under the netname SPCOM-CASA, suggesting a historical relationship or acquisition.
  • The inventory is finely subdivided into /22, /23, and /24 blocks, reflecting site-by-site segmentation typical of a corporate 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

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

1 upstream, 1 downstream and 4 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS16019Vodafone Czech Republic a.s.1,173

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, 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 19 prefixes · 11.26K addresses IPv6 1 prefixes

CountryNamePrefixes
CZCzechia20

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS204383
Registry name
CZ-SPCOM-AS
Registrant
cz-spcom-1-mnt
Abuse contact
abuse@spcom.cz
Registered
2018-03-21
Last changed
2024-03-09
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 20 valid, 0 with no ROA
ROAs
20 authorising AS204383
ASPA
no ASPA record
IRR
100% registered · 20 of 20 announcements
Route objects
20 naming AS204383

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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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