AS14777 — YAHOO

AS14777 announces 2 IPv4 prefixes covering 1,280 addresses and 1 IPv6 prefixes.

About this network

Router interface names in public DNS, down to the port number.

What it's used for

• Edge network space for a large internet company. 1,280 addresses across two IPv4 prefixes, one IPv6 prefix, and one observed BGP neighbour.

Notable

• All six sampled addresses answered. Three returned the wildcard unknown.yahoo.com.
• Two are network equipment: et18-1.bas3-1-edg.dca.yahoo.com and et51.rsw6-1-edg.dca.yahoo.com.
• One is e9.ycpi.dca.yahoo.com, and all three share the same three-letter site code.
• 209.73.184.0/24 carries the netname INTERNET-BLK-1-AV, an early style of registry record.

Interesting

• Those two names describe the hardware precisely. Each begins with a physical port, then the device and its number, then the role it plays at the edge, then the site. Anyone collecting them can map the shape of a site's switching layer without ever sending a packet at it, which is why many operators now keep this naming inside their own resolvers.
• Against that, the wildcard on the ordinary addresses gives nothing away, so the same network is both careful and talkative depending on which part answers.
• The two-letter suffix on the older netname is not the current holder's initials. Address blocks outlive the companies that first registered them, and the registry keeps the original label through every acquisition unless somebody asks for a change.
• One observed neighbour for an edge network means what is visible here is a single upstream relationship rather than the company's full connectivity.

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

Announced prefixes

• 69.147.92.0/22
• 209.73.184.0/24
• 2001:4998:14::/48

Upstream networks

• AS10310 Yahoo Holdings Inc.

Adjacent networks

• AS10310 Yahoo Holdings Inc.