asn.dev

Autonomous system

AS12311 IAEA PO-Box 100 A-1400 Vienna

Unclassified APNIC

IPv4 addresses 65.54K 9 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

International Atomic Energy Agency

Austria · AI-generated

government research legacy

The network of the International Atomic Energy Agency, the United Nations body responsible for nuclear safeguards and safety, based at the Vienna International Centre.

What it's used for

  • The agency's own operations. Every sampled address answers in reverse DNS as iaea.org, and the blocks are registered to IT-Department IAEA under the netname IAEA-OR-AT.

Notable

  • Eight of the nine announced prefixes come out of 161.5.0.0/16, a legacy class B, and they descend in a neat binary ladder: a /17, then a /18, /19, /20, /21, /22, /23 and /24, each exactly half the size of the one before, together covering almost all of the /16.
  • The ninth block is 130.0.70.0/24, registered as NEXTLAYER-CUSTOMER-NET — space taken from a Vienna provider rather than held by the agency itself.
  • One observed BGP neighbour against 65,536 addresses. A large end site with a single way in.

Interesting

  • The AS handle records the address as PO Box 100, A-1400 Vienna, which is the Vienna International Centre — the extraterritorial UN campus the IAEA shares with several other organisations. The agency was set up in 1957 under the "Atoms for Peace" framing, and its inspectorate is the body that actually visits nuclear facilities and reports on them.
  • Every one of the sampled addresses returns the bare domain iaea.org rather than a per-host name, which is what a single wildcard PTR record produces across a whole range. Most networks this size hand out individual hostnames instead.

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
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH120

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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 9 prefixes · 65.54K addresses IPv6 0 prefixes

CountryNamePrefixes
ATAustria9

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS12311
Registry name
IAEA
Registrant
AS12311-MNT
Abuse contact
internet-ripe.alerts@iaea.org
Registered
1970-01-01
Last changed
2025-01-30
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
50% valid · 1 valid, 1 with no ROA
ROAs
1 authorising AS12311
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS12311

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: 447 networks and 1,845 prefixes, as published 2026-10-31. 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