AS14776 — YAHOO

AS14776 announces 2 IPv4 prefixes covering 768 addresses and 1 IPv6 prefixes.

About this network

The same netname as another number in the run, but a different site code in every hostname.

What it's used for

• One of a run of numbers a large web company uses for its edge sites. 768 IPv4 addresses across two prefixes, one IPv6 prefix, and one observed BGP neighbour.

Notable

• Both 69.147.86.0/23 and 69.147.66.0/24 carry the netname A-YAHOO-US5, which also appears under a different AS in the same run.
• All six sampled addresses returned a name, three of them router interfaces.
• Those are et18-1.bas3-1-edg.daa.yahoo.com, et51.rsw6-1-edg.daa.yahoo.com and et16-1.bas4-1-edg.daa.yahoo.com.
• One is a serving name, e7.ycpi.daa.yahoo.com.

Interesting

• Two of those interface names appear under other numbers in this run with only the site code changed, and the third adds a fourth device to the pattern. The template is fixed and the site is the variable, so knowing one site's names is close to knowing every site's.
• A netname shared across two separate autonomous systems means the registry sees one allocation where routing sees two independent networks. The address paperwork was done once, centrally; the routing was arranged site by site.
• The serving name is numbered differently at each location too, and it sits in a block announced alongside the routers. The machines answering requests and the equipment carrying them share the same small range.
• One upstream is the point rather than a weakness: an edge site is meant to be reached from nearby, and a second path would defeat the arrangement.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 69.147.66.0/24
• 69.147.86.0/23
• 2001:4998:20::/48

Upstream networks

• AS10310 Yahoo Holdings Inc.

Adjacent networks

• AS10310 Yahoo Holdings Inc.