AS12436 — BERGON-AS

AS12436 announces 2 IPv4 prefixes covering 9,216 addresses and 0 IPv6 prefixes.

About this network

A Bulgarian provider with a second company's network living inside its DNS.

What it's used for

• Local internet access. 9,216 addresses in two IPv4 prefixes with three observed BGP neighbours and no IPv6 announced.

Notable

• 109.104.192.0/19 is netname BG-BERGON-20090908, registered to Bergon Internet Ltd.
• 45.83.216.0/22 is netname BG-OPTICNET-20190528, registered to OPTIC NET Ltd., a different company.
• Reverse DNS puts both under the same zone but keeps them apart: 255.207.104.109.static-ip.bergon.net against 255.217.83.45.opticnet.bergon.net.
• One of the registry contacts is named On all issues.

Interesting

• That opticnet.bergon.net label is an acquisition caught in the act. The second company's addresses are announced by the first, and rather than renumbering anything, somebody added a subdomain and pointed the reverse zone at it. The old network keeps its identity as a string inside the new one's.
• Both templates write the address backwards, in the order in-addr.arpa uses, which is a reliable sign the zone was generated from the reverse tree rather than typed. The two differ only in the label that follows, so one script produces both.

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

Announced prefixes

• 45.83.216.0/22
• 109.104.192.0/19

Upstream networks

• AS57344 Telehouse EAD
• AS41313 "NOVATEL" EOOD
• AS12615 Global Communication Net Plc

Adjacent networks

• AS57344 Telehouse EAD
• AS41313 "NOVATEL" EOOD
• AS12615 Global Communication Net Plc