asn.dev

Autonomous system

AS21039 E-STEIERMARK-ASN

Unclassified RIPE

IPv4 addresses 6.14K 8 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly AT
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Energie Steiermark

Austria · AI-generated

utility business corporate austria

The AS handle E-STEIERMARK-ASN is held by Energie Steiermark AG.

What it's used for

  • The space carries corporate infrastructure for the energy utility, evidenced by netnames like AT-E-STEIERMARK and reverse DNS entries such as lan-234.net.esn.at and brc-235.net.esn.at.
  • With 6144 IPv4 addresses across 8 prefixes and only 2 observed neighbours, the ratio indicates an internal corporate estate rather than a transit or access network.

Notable

  • All registrants for the announced prefixes are listed as hostmaster; Energie Steiermark AG; Abuse-C Role, fully agreeing with the AS holder.
  • The address inventory consists of contiguous blocks within the 193.186.216.0/22 range, subdivided into /21, /22, /23, and /24 prefixes, reflecting site-by-site segmentation for internal use.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS8447A1 Telekom Austria AG164
AS8437Hutchison Drei Austria GmbH75

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 8 prefixes · 6.14K addresses IPv6 0 prefixes

CountryNamePrefixes
ATAustria8

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS21039
Registry name
E-STEIERMARK-ASN
Registrant
E-STEIERMARK-MNT
Abuse contact
hostmaster@esn.at
Registered
1970-01-01
Last changed
2024-06-26
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 4 with no ROA
ROAs
0 authorising AS21039
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
3 naming AS21039

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 1,773 prefixes, as published 2026-10-13. 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