asn.dev

Autonomous system

AS31239 VIENNAWEB-AS -- AZISTA

Unclassified RIPE

IPv4 addresses 3.33K 3 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly AT
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Viennaweb

Austria · AI-generated

isp residential austria small

VIENNAWEB-AS is operated by Viennaweb Service GmbH, a small Austrian internet service provider.

What it's used for

  • The address space carries static residential or business connections, evidenced by reverse DNS entries such as ip89-31-133-254.static.vie21.viennaweb.at and ip195-225-238-254.static.viennaweb.at.
  • The AS announces 3328 IPv4 addresses across 3 prefixes with only 1 observed neighbour, a ratio typical of a small access network rather than a transit provider.

Notable

  • Registrants include both Internet Viennaweb Service GmbH and AZISTA GmbH, with the latter holding the netname AZISTA-VIE23-NET for the 78.40.212.0/24 block.
  • The inventory consists of three distinct IPv4 prefixes: 89.31.128.0/21, 195.225.236.0/22, and 78.40.212.0/24, all located in Austria.

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

ASNetworkPaths seen
AS12971Internet Viennaweb Service GmbH177

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, 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 3 prefixes · 3.33K addresses IPv6 0 prefixes

CountryNamePrefixes
ATAustria3

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS31239
Registry name
VIENNAWEB-AS
Registrant
Johann Baldermann
Abuse contact
abuse@viennaweb.at
Registered
2004-03-29
Last changed
2024-04-30
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 3 valid, 0 with no ROA
ROAs
3 authorising AS31239
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
3 naming AS31239

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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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