AS15912 — CL-AS

AS15912 announces 5 IPv4 prefixes covering 3,072 addresses and 0 IPv6 prefixes.

About this network

Three blocks are named after a company that no longer appears anywhere else in the record.

What it's used for

• A provider's network. Five IPv4 prefixes announced from Sweden, no IPv6, three thousand and seventy-two addresses, across two observed BGP neighbours.

Notable

• Three netnames spell out a former brand as a hyphenated phrase, ending in the country's own name for itself and the word for a network.
• A fourth is an organisation handle generated by the registry rather than a chosen name, and only the fifth uses the current brand.
• The registrant is the same company throughout, but written with a capital in the middle on three blocks and without on the other two.
• The abuse contact on those three is a role with a four-digit number attached, while the other two use a role named in words.
• Two of fifteen queried addresses answered. One is all four octets reversed, then a single letter, then a domain built from the former brand's phrase. The other is a mail host on a customer's own domain.

Interesting

• A single-letter DNS label between the address and the domain is a separator that costs almost nothing and keeps generated reverse names from colliding with real hostnames in the same zone.
• Finding a customer's mail server in a provider's reverse DNS means the provider set the name, which only happens when the provider also runs the mail.

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

Announced prefixes

• 193.138.102.0/24
• 193.180.184.0/22
• 193.234.78.0/23
• 194.0.64.0/22
• 194.132.28.0/24

Upstream networks

• AS1257 Tele2 Sverige AB
• AS29468 Infracom Managed Services AB

Adjacent networks

• AS1257 Tele2 Sverige AB
• AS29468 Infracom Managed Services AB