asn.dev

Autonomous system

AS12234 UUNET-INT

Unclassified ARIN

IPv4 addresses 3.07K 5 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

UUNET-INT (Verizon Business)

United States · AI-generated

backbone legacy

An operational network of Verizon Business, still carrying the UUNET name in its AS handle and its reverse DNS.

What it's used for

  • Carrier infrastructure rather than customer access. Sampled addresses answer as CMA128.ash.ops.us.uu.net and nat-apac-203-108-235-64.ap.verizonbusiness.com.

Notable

  • 4,096 addresses across seven prefixes and only two observed BGP neighbours. No IPv6 announced.
  • The blocks come from two continents. Four are registered to Verizon Australia Pty Limited under VzB-AU-NETBLOCK, and one /23 is UUNET63, registered to Verizon Business with a second contact still recorded as UUnet Technologies, Inc.
  • One 203.108.235.0/24 is registered as OZEMAIL-AU.

Interesting

  • Every layer of the company's history is legible here at once. UUNET was one of the first commercial internet providers, sold to MFS, then MCI WorldCom, then absorbed into Verizon — and uu.net still resolves, with ash in the hostname for Ashburn, Virginia, the town UUNET helped turn into the densest concentration of internet infrastructure on earth.
  • OzEmail was Australia's large consumer provider of the dial-up era, bought by MCI WorldCom in 1999 and long since passed on again. Its netname is still on a /24 announced from this AS. Registry netnames are effectively write-once: nothing breaks if they go stale, so they become the most reliable record of who owned what, long after every other trace is gone.

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
AS703Verizon Business290

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 5 prefixes · 3.07K addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America5

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS12234
Registry name
UUNET-INT
Registrant
Verizon Business
Abuse contact
abuse@verizon.com
Registered
1999-04-28
Last changed
2022-05-31
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 5 with no ROA
ROAs
0 authorising AS12234
ASPA
no ASPA record
IRR
100% registered · 5 of 5 announcements
Route objects
5 naming AS12234

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