AS12512 — CBXNET

AS12512 announces 2 IPv4 prefixes covering 16,384 addresses and 1 IPv6 prefixes.

About this network

A Berlin provider whose registry records still name the company it used to be, and which has two machines both called gateway.

What it's used for

• Business internet access and hosting in Berlin. 16,384 addresses in two IPv4 /19s, one IPv6 /32, and 14 observed BGP neighbours.

Notable

• Both blocks are netnamed for a different company: DE-COMBOX-990624 and DE-COMBOX-20010209, while the registrant reads CBXNET GmbH.
• The registry contact is COMBOX POP BERLIN, and the operational one CBXNET POP BERLIN — the same role recorded twice under both names.
• Two separate addresses in the sample answer to the identical name, gateway.cbxnet.de.
• The netnames are dated 1999 and 2001, the first in YYMMDD and the second in YYYYMMDD.

Interesting

• CBX is what COMBOX contracts to, so the rename kept the sound and dropped the middle. The registry preserved the long form because a netname is fixed when the block is issued; the shortened version only appears in the fields that get updated.
• Two addresses sharing one reverse name is legal and routine — a PTR is a property of an address, not a claim to be unique — but it means the name identifies a role rather than a machine. Whichever box is the gateway answers to it.
• POP is a point of presence, and putting BERLIN in the contact name for both blocks says this is a provider with one city and no ambition to pretend otherwise.

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

Announced prefixes

• 212.87.32.0/19
• 213.191.32.0/19
• 2a00:d980::/32

Upstream networks

• AS1299 Arelion Sweden AB
• AS8220 COLT Technology Services Group Limited
• AS6939 Hurricane Electric LLC
• AS9002 RETN Limited
• AS24482 SG.GS
• AS33891 Core-Backbone GmbH
• AS8218 Zayo Infrastructure France SA

Adjacent networks

• AS1299 Arelion Sweden AB
• AS8220 COLT Technology Services Group Limited
• AS6939 Hurricane Electric LLC
• AS9002 RETN Limited
• AS24482 SG.GS
• AS8218 Zayo Infrastructure France SA
• AS33891 Core-Backbone GmbH

Internet exchanges

• Berlin Commercial Internet Exchange — Berlin, Germany