asn.dev

Autonomous system

AS34049 WOSACZ-AS wosa.cz

Unclassified RIPE

IPv4 addresses 2.05K 4 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly CZ
Exchanges 0 recorded by PCH
Upstreams 2 1 downstream
Flagged prefixes 0 none

Summary

H-data

Czechia · AI-generated

business czech static

WOSACZ-AS is operated by H-data, spol. s r.o.

What it's used for

  • The address space carries static router infrastructure, evidenced by reverse DNS entries such as 81.19.12.128.static.router.wosa.cz and netnames like CZ-HDATA-20160205 and WOSA-CZ.
  • The AS announces 2048 IPv4 addresses across 4 prefixes and 1 IPv6 prefix, while maintaining only 3 observed neighbours, a ratio indicative of a small-scale access or business network rather than a transit provider.

Notable

  • Registrants for the announced prefixes include both H-data, spol. s r.o. and FASTER CZ spol. s r.o., with the latter appearing as the technical contact for three of the four IPv4 blocks.
  • The inventory consists of four distinct IPv4 prefixes ranging from a /22 to /24s, alongside a single IPv6 /29, reflecting a modest and segmented 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

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, 1 downstream and 5 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS16019Vodafone Czech Republic a.s.170
AS24641FASTER CZ spol. s r.o.103

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, 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 4 prefixes · 2.05K addresses IPv6 1 prefixes

CountryNamePrefixes
CZCzechia5

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS34049
Registry name
WOSACZ-AS
Registrant
H-data, spol. s r.o.
Abuse contact
abuse@wosa.cz
Registered
2004-10-11
Last changed
2019-06-05
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 5 valid, 0 with no ROA
ROAs
6 authorising AS34049
ASPA
no ASPA record
IRR
100% registered · 5 of 5 announcements
Route objects
6 naming AS34049

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 1,781 prefixes, as published 2026-10-16. 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