asn.dev

Autonomous system

AS7233 YAHOO-

Unclassified ARIN

IPv4 addresses 1.02K 2 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Yahoo

United States · AI-generated

hosting legacy

One of Yahoo's smaller autonomous systems, registered under the handle YAHOO-US to the company's Sunnyvale, California address. Yahoo's main production traffic rides other ASNs; AS7233 announces only a few narrow prefixes.

What it's used for

  • Yahoo's own service and network infrastructure. Reverse DNS in the space resolves to unknown.yahoo.com hosts behind Yahoo-operated edge routers (fy94.net naming), so this is company-run datacentre and network address space, not third-party hosting or consumer access.

Notable

  • Only two IPv4 /23s and two IPv6 /48s are announced, out of 98.136.0.0 and 209.131.48.0 — a deliberately small slice of Yahoo's overall address holdings.
  • The ASN is a 1996 ARIN registration, from the period when Yahoo was still a young search and directory company.

Interesting

  • The router names embed site codes such as sjc and sva, the airport-style shorthand for Yahoo's San Jose and Sunnyvale facilities.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS10310Yahoo Holdings Inc.190

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-30, 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 2 prefixes · 1.02K addresses IPv6 1 prefixes

CountryNamePrefixes
USUnited States of America3

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS7233
Registry name
YAHOO-US
Registrant
Yahoo
Abuse contact
rir-abuse@yahooinc.com
Registered
1996-10-15
Last changed
2005-08-23
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 4 with no ROA
ROAs
1 authorising AS7233
ASPA
no ASPA record
IRR
25% registered · 1 of 4 announcements
Route objects
13 naming AS7233

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 1,849 prefixes, as published 2026-10-30. 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