Autonomous system
AS10880 YAHOO-AN2
Hosting ARIN
Summary
Yahoo Holdings
cdn hosting enterprise legacy
YAHOO-AN2 is one of Yahoo's autonomous systems, registered to Yahoo Holdings Inc. It is a small satellite AS rather than Yahoo's main backbone, and the routing shows it doing a specific job.
What it's used for
Serving Yahoo's own content and services from scattered edge locations. RIS shows 6 announced IPv4 prefixes totalling only 1,536 addresses, 6 announced IPv6 prefixes, and 1 observed neighbour.
The address count is tiny, but the geography of those addresses is the point. The v4 prefixes are six separate /24s pulled from wildly different registries: 68.180 and 209.191 are ARIN space, 202.165 and 203.84 are APNIC space. The six IPv6 /48s repeat the pattern, with blocks from 2406:: (Asia-Pacific), 2001:4998:: (Yahoo's own long-held allocation) and 2804:: (Latin America). A network that announces one /24 and one /48 per region, and nothing bigger anywhere, is a set of points of presence, not a datacentre footprint.
Every sampled address, in every region, answers to unknown.yahoo.com. That is Yahoo's generic default reverse record, and its uniformity across ARIN and APNIC space is strong confirmation that all six prefixes are first-party Yahoo infrastructure rather than customer or leased space wearing someone else's rDNS.
Notable
Yahoo runs several ASNs; this one behaves like a content edge, and the lone observed neighbour is consistent with it hanging off Yahoo's own backbone rather than buying transit independently.
Interesting
Yahoo's address space is a fossil record of the 1990s commercial internet: blocks from four continents, held continuously through the Yahoo, Altaba, Oath, Verizon Media and Apollo eras, still routed under a low-numbered ASN.
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
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.
| AS | Network | Paths seen |
|---|---|---|
| AS10310 | Yahoo Holdings Inc. | 578 |
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
IPv4 5 prefixes · 1.54K addresses IPv6 6 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 11 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10880- Registry name
- YAHOO-AN2
- Registrant
- Yahoo Holdings Inc.
- Abuse contact
- rir-abuse@yahooinc.com
- Registered
- 2006-05-05
- Last changed
- 2019-05-01
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 12 with no ROA
- ROAs
- 0 authorising AS10880
- ASPA
- no ASPA record
- IRR
- 92% registered · 11 of 12 announcements 1 other origin
- Route objects
- 15 naming AS10880
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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 1,771 prefixes, as published 2026-10-15. 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