AS7233 — YAHOO-

AS7233 announces 2 IPv4 prefixes covering 1,024 addresses and 1 IPv6 prefixes.

About this network

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.

Announced prefixes

• 98.136.0.0/23
• 209.131.48.0/23
• 2001:4998:ef60::/47

Upstream networks

• AS10310 Yahoo Holdings Inc.

Adjacent networks

• AS10310 Yahoo Holdings Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 4 not-found announcements; 1 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 13 route objects.
• Listed in as-sets: AS-YAHOO.