AS12796 — TCV-AS

Network type: residential

AS12796 announces 4 IPv4 prefixes covering 13,056 addresses and 0 IPv6 prefixes.

About this network

A cable operator's four blocks, one of them registered to a company with a different name.

What it's used for

• A Bulgarian cable and internet operator. 13,056 addresses across four IPv4 prefixes, three observed BGP neighbours, and no IPv6 announced.

Notable

• Everything sits in 94.190: a /19, a /20, a /23 and a /24.
• Netnames vary by block: TCV, BG-CCC-20080826, and INTERBILD registered to Telecommunication Company Varna EAD.
• The RDAP lookup for 94.190.192.0/23 failed.
• Reverse names put the last octet first: 94.190.183.254 answers as ip-254-183.tcv.bg.

Interesting

• The reverse names are built backwards, last octet then third, which is the order in-addr.arpa uses rather than the order humans write. A zone generated straight from the delegation comes out this way; one written from a list of addresses does not. It is a reliable tell for how the DNS was produced.
• Three names for what is evidently one operator — the AS handle, the cable corporation, and a telecom company named for the city of Varna — is the residue of a regional cable business assembled from smaller ones. The registry keeps whichever entity signed for each block.
• 13,056 addresses against three neighbours is an access network, and the mixture of block sizes says it grew in uneven steps: a /19 when subscribers arrived in bulk, then a /23 and a /24 topping it up.

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

Announced prefixes

• 94.190.128.0/20
• 94.190.160.0/19
• 94.190.192.0/23
• 94.190.194.0/24

Upstream networks

• AS51582 Cifrova Kabelna Korporacia EOOD

Adjacent networks

• AS51582 Cifrova Kabelna Korporacia EOOD

Internet exchanges

• T-CIX — Sofia, Bulgaria