Autonomous system
AS36229 YAHOO-YSM-SC8
Unclassified ARIN
Summary
Yahoo
business infrastructure corporate
YAHOO-YSM-SC8 is operated by Yahoo Holdings Inc.
What it's used for
- The address space carries internal corporate infrastructure, evidenced by reverse DNS entries such as
et18-1.bas3-1-edg.laa.yahoo.comandet51.rsw6-1-edg.laa.yahoo.com, which indicate edge and routing equipment within Yahoo's network. - The AS announces 768 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, indicating a small, self-contained corporate estate rather than a transit or access network.
Notable
- Registrants for both announced IPv4 prefixes are listed as Yahoo Holdings Inc., matching the AS holder and confirming direct ownership of the address space.
- The inventory consists of two IPv4 blocks (209.73.190.0/23 and 209.73.188.0/24) and a single IPv6 /48, reflecting a compact, internally managed network footprint.
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. | 215 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 768 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS36229- Registry name
- YAHOO-YSM-SC8
- Registrant
- Yahoo Holdings Inc.
- Abuse contact
- rir-abuse@yahooinc.com
- Registered
- 2005-10-25
- Last changed
- 2019-05-01
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS36229
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 6 naming AS36229
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 1,784 prefixes, as published 2026-10-19. 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