Autonomous system
AS201654 CEZNET-AS CEZNET s.r.o.
Unclassified RIPE
Summary
CEZNET s.r.o.
business czech corporate
The AS handle WEBSOFT is held by CEZNET s.r.o.
What it's used for
- The address space carries corporate infrastructure, evidenced by netnames
CZ-CEZNET21-20140819andHAKOregistered to CEZNET hostmaster. - The network announces 1792 IPv4 addresses across 3 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, indicating a small, self-contained corporate estate rather than a transit or access provider.
- Traffic from this AS consists of internal corporate endpoints and services for CEZNET s.r.o., a Czech telecommunications company.
Notable
- Registrants for all announced prefixes align with the announcer, consistently listing CEZNET hostmaster and CEZNET s.r.o.
- The inventory is finely subdivided into three distinct IPv4 blocks, reflecting site-by-site segmentation typical of an internal corporate 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.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS39791 | Telco Pro Services, a. s. | 148 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-06, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 1.79K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 4 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS201654- Registry name
- CEZNET-AS
- Registrant
- CEZNET-MNT
- Abuse contact
- dohled@ceznet.cz
- Registered
- 2014-08-21
- Last changed
- 2025-09-12
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 3 valid, 0 with no ROA
- ROAs
- 3 authorising AS201654
- ASPA
- no ASPA record
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 3 naming AS201654
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: 454 networks and 1,854 prefixes, as published 2026-11-06. 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