AS15791 — YELLOWGROUP-AS

AS15791 announces 1 IPv4 prefixes covering 1,024 addresses and 0 IPv6 prefixes.

About this network

A number from the earliest era that the routing archive did not see until fifteen years later.

What it's used for

• A mobile data company's network. One IPv4 /22 announced from the Netherlands, no IPv6, one thousand and twenty-four addresses, through a single observed BGP neighbour.

Notable

• The number sits among others first seen at the turn of the century, but this one is absent from the routing archive until the middle of the following decade.
• The block's allocation date is the year before it was first seen announced, so the addresses and the announcement arrived together, long after the number itself.
• The AS handle names a group by a colour, which matches neither the netname nor the holder.
• The netname is a country code, three letters of the holder's name and that allocation date.
• One contact is the company name with the registry's abbreviation and the word for an administrator appended.
• Three addresses were queried for reverse DNS and none returned a name.

Interesting

• A low number appearing this late is a number that was issued, never announced, and then reused. The gap is where a company that had a number but no network sat, or where a number waited between owners.
• A thousand addresses behind one upstream, with a group brand in the handle and an operating company in the holder field, is a small subsidiary given exactly as much network as it needs.

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

Announced prefixes

• 185.109.232.0/22

Upstream networks

• AS41696 Ram Mobile Data (Netherlands) B.V.

Adjacent networks

• AS41696 Ram Mobile Data (Netherlands) B.V.