AS13002 ISIX-AS

A UK partnership whose reverse names place every answering address in St Petersburg.

What it's used for

• A network operator registered in the United Kingdom. 8,704 addresses across eight IPv4 prefixes, 19 IPv6 prefixes, and 192 observed BGP neighbours.

Notable

• Four blocks share the netname UK-ISIX-20021010; a later one is UK-ISIX-20180511.
• Three carry other holders' names: Kenai, registered to Kenai Global Services, and LINKEY-NET twice, registered to the Linkey Network Team.
• Eleven of eighteen sampled addresses answered, all of the form ip-213-159-100-0.spb.as13002.net.
• First seen in the routing archive in August 2010, well after the archive's 2000 floor.

Interesting

• The reverse domain is the AS number itself, as13002.net. Operators almost always name infrastructure after the company; naming it after the routing identifier makes the network self-describing in a traceroute, and survives any rebrand the company goes through.
• Every answering name carries the label spb, the usual abbreviation for St Petersburg, inside a registration held by a UK limited liability partnership. Where a company is incorporated and where its addresses are used are separate facts, and reverse DNS is one of the few places the second one is visible at all.
• Two other companies' netnames sit inside this AS. Blocks assigned to customers keep the customer's own registry record, so netnames count relationships the AS number alone would hide.
• The first-seen date is a real observation rather than the archive floor most packs carry.