AS13036 — TMOBILE-

AS13036 announces 34 IPv4 prefixes covering 992,256 addresses and 3 IPv6 prefixes.

About this network

Six-digit and eight-digit netname dates alternating inside one holder's own records.

What it's used for

• A Czech mobile carrier. 992,256 addresses across 34 IPv4 prefixes, three IPv6 prefixes, and one observed BGP neighbour.

Notable

• Every netname is CZ-RADIOMOBIL-, a company name the operator no longer trades under.
• Their dates run 930901, 19941103, 950808, 20060511, 20070322, 20090929 and 20100924.
• Eight of the announced blocks are /16s.
• Seven of eighteen sampled addresses answered, all as 46-13-64-0.customers.tmcz.cz.
• The lookup for 193.86.0.0/16 failed, so nothing is known about that block's registration either way.

Interesting

• This one holder settles a question the rest of the corpus only hints at. A six-digit 1993 date, an eight-digit 1994 date, and a six-digit 1995 date sit in the same records in that order. The long form did not replace the short one; the two alternated for years inside a single organisation, so the length of a netname's date dates nothing on its own. Read the digits.
• RADIOMOBIL on every block is the carrier's earlier name, kept through a rebrand that touched everything customers see and nothing the registry serves.
• Eight /16s is a mobile network from the era when a carrier could ask for address space by the class-B and receive it. Nearly a million addresses now sit behind one observed neighbour, the familiar eyeball-network shape: enormous subscriber space, transit bought rather than peered.

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

Announced prefixes

• 37.48.0.0/18
• 46.13.0.0/16
• 62.77.64.0/18
• 62.84.128.0/19
• 62.141.0.0/19
• 62.168.0.0/18
• 62.209.192.0/18
• 78.80.0.0/16
• 80.95.240.0/20
• 89.24.0.0/16
• 89.233.128.0/18
• 91.139.0.0/17
• 93.153.0.0/17
• 109.75.144.0/20
• 109.183.0.0/16
• 185.14.188.0/22
• 193.85.0.0/16
• 193.86.0.0/16
• 193.179.0.0/16
• 194.108.0.0/16
• 194.149.96.0/19
• 194.212.0.0/16
• 194.213.32.0/19
• 194.213.192.0/19
• 195.22.32.0/19
• 195.39.0.0/17
• 195.47.0.0/17
• 195.70.128.0/19
• 195.144.96.0/19
• 212.47.0.0/19
• 212.65.192.0/18
• 212.67.64.0/19
• 213.29.0.0/16
• 213.210.128.0/18
• 2001:af0::/32
• 2001:b80::/29
• 2001:1ae8::/29

Upstream networks

• AS6855 Slovak Telekom, a.s.

Adjacent networks

• AS6855 Slovak Telekom, a.s.