Autonomous system
AS13036 TMOBILE-
Unclassified RIPE
Summary
T-Mobile Czech Republic
mobile telecom isp
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
930901,19941103,950808,20060511,20070322,20090929and20100924. - 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
193.86.0.0/16failed, 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.
RADIOMOBILon 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS6855 | Slovak Telekom, a.s. | 2,133 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 34 prefixes · 992K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 37 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS13036- Registry name
- TMOBILE-CZ
- Registrant
- AS13036-MNT
- Abuse contact
- abuse@t-mobile.cz
- Registered
- 1970-01-01
- Last changed
- 2021-11-19
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 37 valid, 0 with no ROA
- ROAs
- 37 authorising AS13036
- ASPA
- no ASPA record
- IRR
- 100% registered · 37 of 37 announcements
- Route objects
- 37 naming AS13036
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 436 networks and 1,771 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere