AS12829 — ANGELSOFT Bulgaria

AS12829 announces 5 IPv4 prefixes covering 27,136 addresses and 0 IPv6 prefixes.

About this network

A halving ladder out of one block, three prefixes sharing one date, and reverse names written backwards.

What it's used for

• A Bulgarian internet provider. 27,136 addresses across ten IPv4 prefixes, one observed BGP neighbour, and no IPv6 announced.

Notable

• The largest blocks are 87.252.160.0/19 and 95.168.224.0/19.
• Four prefixes descend from one neighbourhood: 80.80.128.0/20, 80.80.144.0/21, 80.80.152.0/22 and 80.80.156.0/23.
• Netnames are dated BG-ANGELSOFT-20010717 (three blocks), 20050923, 20071022 and 20090107.
• Six of eighteen sampled addresses returned names, all of the form 254-183-252-87.filibe.net.

Interesting

• The reverse names run the address backwards. 87.252.183.254 answers as 254-183-252-87.filibe.net, last octet first. Both orderings are used in the wild, and the choice is made once, in a script, by whoever set the zone up. It never gets revisited.
• The 80.80 blocks form a ladder: a /20, then a /21 beginning where it ends, then a /22, then a /23. Three of them share a single 2001 date, so this is not gradual growth but one application filled in four separate requests, or one clerk recording four assignments on one afternoon.
• One neighbour carrying 27,136 addresses means this network reaches the internet through a single upstream. That is unusually simple for a provider of this size, and also a single point of failure.
• filibe.net is the old name for the city of Plovdiv rather than anything resembling the company name. Reverse zones get whatever domain the operator already owned.

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

Announced prefixes

• 79.134.160.0/21
• 79.134.168.0/23
• 80.80.128.0/19
• 87.252.160.0/19
• 95.168.224.0/19

Upstream networks

• AS8262 Evolink EAD

Adjacent networks

• AS8262 Evolink EAD