AS12924 VIAES-AS Sevilla

Three blocks, three former company names, and reverse names that count in a made-up numbering scheme.

What it's used for

• The network of a Spanish provider of hosted telephony and communications services. 1,024 addresses across three IPv4 prefixes, one IPv6 prefix, and three observed BGP neighbours.

Notable

• The blocks are 185.42.120.0/23, 185.42.122.0/24 and 213.236.1.0/24.
• Their netnames are ES-INTERBOOK-20131209, SOYTIC and VIAES-NET, all registered to the same current holder.
• The AS handle is VIAES-AS, matching only the third.
• Three of nine sampled addresses returned names: via-addr1064.vianetworks.es, via-addr1127.vianetworks.es and via-addr1190.vianetworks.es.

Interesting

• Four company names appear in one small record: the netnames give three, the reverse zone gives a fourth. Each acquisition renamed the company but only ever relabelled the piece that was convenient to relabel, and the result is that the shortest path to a firm's corporate history runs through its address registrations.
• The reverse names encode the last octet with a 1 in front and zero padding, so address .64 becomes 1064 and .190 becomes 1190. Somebody needed hostnames that sort predictably and never begin with a digit alone, and invented a scheme that works while explaining itself to nobody.
• The domain in those names belongs to an internet provider that no longer trades under it, yet the zone is still served and still answering. Reverse DNS keeps working long after the brand behind it stops, because nothing forces a rename and something usually breaks if you attempt one.