AS12579 — Internet-Service-Provider

AS12579 announces 1 IPv4 prefixes covering 8,192 addresses and 1 IPv6 prefixes.

About this network

An AS whose name field says what it is rather than who it is: Internet-Service-Provider.

What it's used for

• Internet access in Germany. 8,192 addresses in a single IPv4 prefix, one IPv6 prefix, and three observed BGP neighbours.

Notable

• The AS handle is the generic string Internet-Service-Provider.
• The whole IPv4 inventory is 212.44.160.0/19, netname DE-XNCNET-990325.
• The IPv6 announcement is 2a00:1978::/32.
• The registry entry carries the short handle XNC alongside the full company name, Xenologics Networks & Communications GmbH.
• Three sampled addresses were queried and none returned a reverse name.

Interesting

• Every other entry in a routing table's name column is a company, a brand or an acronym. This one is a job description. Somebody filling in the form read the field as asking what the network does, and nobody has corrected it in the quarter century since, because nothing downstream of BGP reads that field for meaning.
• The netname takes the opposite approach and compresses the three-word company name to four letters. The same organisation described itself in the most generic and the most cryptic terms available, in two fields of the same registry.
• A /19 with three upstreams, where none of the sampled addresses answered with a name, is a provider that sells connectivity rather than hosting. The addresses go out to customers, and naming them is the customer's problem.

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

Announced prefixes

• 212.44.160.0/19
• 2a00:1978::/32

Upstream networks

• AS8422 NetCologne Gesellschaft fur Telekommunikation mbH
• AS3320 Deutsche Telekom AG
• AS20676 Plusnet GmbH

Adjacent networks

• AS8422 NetCologne Gesellschaft fur Telekommunikation mbH
• AS3320 Deutsche Telekom AG
• AS20676 Plusnet GmbH