Mobile operator · Czech Republic

T-Mobile Czech Republic ASN, MCC/MNC and IP prefixes

T-Mobile Czech Republic is a mobile network operator in the Czech Republic, part of Deutsche Telekom. It routes traffic through 8 autonomous systems (AS13036, AS2819, AS5588, AS12767, ...), which announced 65 prefixes at our last probe, and its SIMs carry MCC/MNC 230-01, 230-07.

ASNs
8
Prefixes
65
Reviewed
September 2026
Country
Czech Republic (CZ)
Parent group
Deutsche Telekom
ASNs
AS13036, AS2819, AS5588, AS12767, AS15485, AS21142, AS48574, AS50491
MCC / MNC
230-01, 230-07
Network generations
4G LTE, 5G
ASNs confirmed
8 of 8
Announced prefixes
65 at probe on 2026-09-06
Official site
www.t-mobile.cz

Autonomous systems

Holder names and prefix counts come from the RIPE NCC's RIPEstat Data API, fetched on 2026-09-06. Role and confidence come from the evidence linked in each row; "confirmed" means a PeeringDB or RIPEstat record, or the operator's own site, names the operator.
T-Mobile Czech Republic autonomous systems
ASNHolder (RIPEstat)RoleAnnouncedIPv4 prefixesIPv6 prefixesEvidence
AS13036TMOBILE-CZ T-Mobile Czech Republic a.s.PeeringDB: T-Mobile CZ AS13036 · NSPMobile networkconfirmedyes343source · RIPEstat · PeeringDB
AS2819GTSCZ T-Mobile Czech Republic a.s.Fixed-lineconfirmedno00source · RIPEstat
AS5588GTSCE T-Mobile Czech Republic a.s.Fixed-lineconfirmedyes232source · RIPEstat
AS12767PRAGONET-AS T-Mobile Czech Republic a.s.PeeringDB: T-Systems CZ · NSPFixed-lineconfirmedno00source · RIPEstat · PeeringDB
AS15485GTSNOVERA T-Mobile Czech Republic a.s.Fixed-lineconfirmedno00source · RIPEstat
AS21142PRAGONET-TRANSIT-AS T-Mobile Czech Republic a.s.PeeringDB: T-Mobile CZ AS21142Fixed-lineconfirmedno00source · RIPEstat · PeeringDB
AS48574ASN-CZ-PLANET-A-48574 T-Mobile Czech Republic a.s.Role not documentedconfirmedyes30source · RIPEstat
AS50491ASN-CZ-PLANET-A-50491 T-Mobile Czech Republic a.s.Role not documentedconfirmedno00source · RIPEstat

Mobile network codes

The MCC identifies the country and the MNC identifies the operator inside it. Together they appear in the IMSI of every SIM on the network and in device diagnostics; they are how a handset knows which network it is on.
T-Mobile Czech Republic MCC and MNC
MCC-MNCMCCMNCSource
230-0123001en.wikipedia.org/wiki/Mobile_Network_Codes_in_IT
230-0723007en.wikipedia.org/wiki/Mobile_Network_Codes_in_IT

About T-Mobile Czech Republic

T-Mobile Czech Republic is a mobile network operator in the Czech Republic and part of Deutsche Telekom. The registry records AS13036 as the ASN carrying its mobile network, with seven further ASNs held for fixed-line and undocumented roles. Its mobile country and network codes are 230-01 and 230-07. It runs 4G LTE and 5G.

The registry lists eight ASNs held by T-Mobile Czech Republic. AS13036 is the mobile-carrying ASN, and at the last probe it announced 34 IPv4 prefixes against 3 IPv6 prefixes; PeeringDB records it as T-Mobile CZ AS13036 with an NSP information type, and RIPE whois describes it as a fixed and mobile service provider. AS5588, a legacy GTS backbone ASN, announced 23 IPv4 and 2 IPv6 prefixes. AS48574 announced 3 IPv4 prefixes and no IPv6. AS2819, AS12767, AS15485, AS21142 and AS50491 announced nothing, though PeeringDB holds records for AS12767 as T-Systems CZ and AS21142 as T-Mobile CZ AS21142.

An address whose origin ASN is AS13036 is routed by T-Mobile Czech Republic on the ASN the registry marks as mobile, so mobile is the likely fit, though the same ASN also carries the operator's fixed customers and the origin ASN alone does not settle it. AS5588 is recorded as fixed-line, so an address there is more likely a wholesale or business circuit. AS48574 has no documented role, so an address originating from it could be mobile, fixed or enterprise. The five ASNs that announce no prefixes have no live addresses to classify.

Research note. AS13036 (TMOBILE-CZ): PeeringDB name 'T-Mobile CZ AS13036', website t-mobile.cz, info_type NSP; RIPE whois remarks 'Fix/Mobile Service provider'; RIPEstat announced. AS5588 (GTSCE, ex-GTS Central Europe): PeeringDB 'T-Mobile CZ AS5588', NSP, notes 'closed'; RIPEstat announced; legacy GTS fixed/wholesale backbone. AS2819 (GTSCZ), 15485 (GTSNOVERA), 12767/21142 (PRAGONET) are ex-GTS/Pragonet fixed-line ASNs held by T-Mobile CZ per RIPEstat, all not announced. AS48574 announced and AS50491 not announced (ex-Planet A cable ISP, role unknown). MNC 230-01 is the consumer network (GSM 900, LTE 800/1800/2100/2600, 5G 700/1800/2100); 230-07 is former ASTELNET LTE 800 held by T-Mobile. Parent: t-mobile.cz contact page states 'Jsme součástí mezinárodního koncernu Deutsche Telekom'. 5G page: coverage expanded to more than a quarter of population; LTE-compatible SIM required.

Check whether an IP belongs to T-Mobile Czech Republic

Look up the origin ASN of the address and compare it with the table above. RIPEstat answers for any address, and the RADB whois mirror lists the routes registered under an ASN.
Origin ASN of an address
curl -s "https://stat.ripe.net/data/prefix-overview/data.json?resource=203.0.113.9" | jq '.data.asns'
Routes registered under AS13036
whois -h whois.radb.net -- '-i origin AS13036' | grep ^route

Questions

What is T-Mobile Czech Republic's ASN?
AS13036 is the ASN the registry records as carrying T-Mobile Czech Republic's mobile network. The operator holds seven more ASNs, most of them legacy GTS and Pragonet fixed-line numbers, and only AS5588 and AS48574 announce prefixes alongside AS13036.
What is the MCC/MNC of T-Mobile Czech Republic?
The registry lists two rows under mobile country code 230, with MNCs 01 and 07. MNC 01 is the consumer network, running GSM 900, LTE on 800, 1800, 2100 and 2600, and 5G on 700, 1800 and 2100. MNC 07 is a former ASTELNET LTE 800 code held by T-Mobile.
Is an IP from AS13036 a mobile IP?
It is routed by T-Mobile Czech Republic, and the registry marks AS13036 as the mobile-carrying ASN, so a handset address is a reasonable reading. RIPE whois describes the ASN as a fixed and mobile service provider, so the same number also carries fixed connections and the ASN alone does not prove access type.

Where T-Mobile Czech Republic meets other networks

PeeringDB records no public exchange presence for T-Mobile Czech Republic, which says nothing about how it reaches other networks privately. These are the Czech Republic cities where the registry does record exchange and facility capacity.

Network cities in the Czech Republic: Prague, Brno.

Sources

Operator and registry pages used for this entry, followed by the RIPEstat Data API (holder, announced prefixes) and the PeeringDB API (network records).

  1. [1]https://www.peeringdb.com/api/net?asn=13036
  2. [2]https://stat.ripe.net/data/as-overview/data.json?resource=AS13036
  3. [3]https://stat.ripe.net/data/whois/data.json?resource=AS13036
  4. [4]https://www.peeringdb.com/api/net?asn=5588
  5. [5]https://stat.ripe.net/data/as-overview/data.json?resource=AS5588
  6. [6]https://stat.ripe.net/data/whois/data.json?resource=AS5588
  7. [7]https://stat.ripe.net/data/as-overview/data.json?resource=AS2819
  8. [8]https://stat.ripe.net/data/as-overview/data.json?resource=AS15485
  9. [9]https://stat.ripe.net/data/as-overview/data.json?resource=AS12767
  10. [10]https://stat.ripe.net/data/as-overview/data.json?resource=AS21142
  11. [11]https://stat.ripe.net/data/as-overview/data.json?resource=AS48574
  12. [12]https://stat.ripe.net/data/as-overview/data.json?resource=AS50491
  13. [13]https://www.t-mobile.cz/podnikatele-firmy/kontaktni-informace/
  14. [14]https://en.wikipedia.org/wiki/T-Mobile_Czech_Republic
  15. [15]https://eshop.t-mobile.cz/5g
  16. [16]https://en.wikipedia.org/wiki/Mobile_Network_Codes_in_ITU_region_2xx_(Europe)
  17. [17]https://stat.ripe.net/docs/02.data-api/
  18. [18]https://www.peeringdb.com/apidocs/

ASN and prefix data describe how the operator's networks are registered and announced. They do not identify an individual subscriber or where a device is, since carriers route traffic from many areas through shared gateways.