AS14779 — YAHOO

AS14779 announces 2 IPv4 prefixes covering 768 addresses and 1 IPv6 prefixes.

About this network

Every sampled address answered, and three of the names describe exactly what the box is.

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 69.147.82.0/23 and 69.147.85.0/24 carry the netname A-YAHOO-US5, one entry in a numbered series.
• All six sampled addresses returned a name, which is rare in this range.
• Two are router interfaces, et18-1.bas3-1-edg.nya.yahoo.com and et51.rsw6-1-edg.nya.yahoo.com.
• One is e37.ycpi.nya.yahoo.com, a serving name rather than a network one.

Interesting

• The three-letter code in the middle of every name is the site, and it is the only part that changes between this number and its neighbours in the run. The same interface on the same class of box carries the same name at every location, which makes a traceroute readable to anyone who has learned the site codes and opaque to everyone else.
• The router names encode the port before the box: an interface identifier, then a device role, then a position in the rack row. That ordering puts the most specific detail first, which is backwards from how domain names usually narrow, and it is what you get when the name is assembled by the system that configures the port.
• A serving name sitting in the same block as the routers shows this site does both jobs from one range: the machines answering requests and the equipment carrying them to the door.
• One upstream, a numbered netname, and full reverse coverage describes infrastructure built to a plan rather than accumulated.

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

Announced prefixes

• 69.147.82.0/23
• 69.147.85.0/24
• 2001:4998:1c::/48

Upstream networks

• AS10310 Yahoo Holdings Inc.

Adjacent networks

• AS10310 Yahoo Holdings Inc.