AS15139 — PANASONIC

AS15139 announces 6 IPv4 prefixes covering 7,680 addresses and 0 IPv6 prefixes.

About this network

Six pieces of one range, two of which the registry would not answer for.

What it's used for

• An electronics manufacturer's regional network. Six IPv4 prefixes announced from the United States, no IPv6, and three observed BGP neighbours.

Notable

• All six prefixes come out of 140.212, at three different lengths, with gaps between them that this network does not announce.
• Two of the six registry lookups failed, so those blocks' ownership is unknown rather than absent.
• The four that resolved carry the same netname and the same registrant, written entirely in capitals with the corporate form abbreviated, while the holder record spells it out.
• Eighteen addresses were queried for reverse DNS and none returned a name.
• The routing history begins in 2001.

Interesting

• A single netname across every block means the registry records that this company holds space and nothing about how it is used. The routing shows six separate announcements out of one range, which is structure the registry has no field for.
• Abbreviating the corporate form in one field and spelling it out in another is the most common way a company's name fails to match itself. Neither form is canonical and both are current.
• Three upstreams, no IPv6, and nothing in reverse: a regional subsidiary's network built to connect offices and reach suppliers, with no public-facing surface announced from this AS number.

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

Announced prefixes

• 140.212.24.0/21
• 140.212.40.0/24
• 140.212.44.0/24
• 140.212.96.0/22
• 140.212.160.0/21
• 140.212.176.0/21

Upstream networks

• AS7018 AT&T Enterprises, LLC
• AS400684 Zoom Fiber
• AS23222 Charter Communications LLC

Adjacent networks

• AS7018 AT&T Enterprises, LLC
• AS400684 Zoom Fiber
• AS23222 Charter Communications LLC