Czechia Phone Carrier Lookup
Find which network a Czechia number is on today, its line type and whether it has been ported. Free, private, no sign-up.
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Czechia phone numbers at a glance
Czechia numbers use the country code +420, and mobile numbers usually start with +420 6 or +420 7. The networks with the most number ranges are T-Mobile, Vodafone, O2 and Tesco Mobile CR. Because numbers can move between networks, the lookup above checks live carrier records to show the network a number is on today. It also shows the line type, whether the number was ported and whether it is a VoIP line - free, with no sign-up.
Updated October 2026
- Country code
- +420
- Mobile number length
- 9 digits after +420
- Mobiles start with
- +420 6 or +420 7
How Czechia numbers are written
Official example numbers for each line type, written the international way and the way they are dialled inside Czechia.
| Line type | International | Inside Czechia |
|---|---|---|
| Mobile | +420 601 123 456 |
601 123 456 |
| Landline | +420 212 345 678 |
212 345 678 |
| Toll-free | +420 800 123 456 |
800 123 456 |
Networks and number ranges in Czechia
Which network each block of Czechia numbers was first issued to, from the official numbering data. Numbers can move between networks, so run a lookup to see where one is today.
T-Mobile
+420 603
+420 604
+420 605
+420 7030
+420 7031
+420 7032
+55 more
Vodafone
+420 608
+420 73044
+420 73045
+420 73046
+420 73047
+420 73048
+40 more
O2
+420 601
+420 602
+420 606
+420 607
+420 702
+420 71
+21 more
Tesco Mobile CR
+420 79234
+420 79235
+420 79238
+420 79240
+420 79241
+420 79242
+6 more
SAZKA sazkova kancelar, a.s
+420 7040
+420 7041
+420 7042
+420 7043
+420 7044
+420 7045
+1 more
CEZ Group
+420 7050
+420 7051
+420 7052
+420 7053
+420 7054
TERMS
+420 79950
+420 79951
+420 79952
+420 79953
TT Quality s.r.o.
+420 77100
+420 77200
+420 77900
+420 77977
3ton s.r.o.
+420 77051
+420 77052
+420 79192
GoMobil
+420 79955
+420 79956
+420 79958
Cesky bezdrat
+420 77071
+420 77072
Compatel
+420 73040
+420 77050
Show 22 more networks
IPEX
+420 77272
+420 77273
SMART Comp
+420 73041
+420 73042
Vectone Distribution Czech Republic s.r.o(Mundio)
+420 7950
+420 7951
YATECO
+420 70301
+420 77078
ha-vel internet
+420 77880
+420 77990
miniTEL
+420 77111
+420 79979
Axfone
+420 73033
BSG
+420 70376
COMA
+420 70373
DataCell
+420 706
Dial Telecom
+420 79750
Dragon Internet
+420 77277
FAYN Telecommunications
+420 70370
GOPE Systems a.s.
+420 79193
MATERNA Communications
+420 73035
METRONET
+420 79920
MONTYHO TECHNOLOGY s.r.o. (CANISTEC)
+420 77177
Nordic Telecom s.r.o.(Air Telecom - MobilKom)
+420 79000
PODA a.s. (SkyNet)
+420 73043
Plus4U Mobile s.r.o.
+420 77997
SIA Net Balt
+420 79260
TRAVEL TELEKOMMUNIKATION
+420 7910
Ranges are written in international format; inside Czechia drop the +420. Source: Google libphonenumber numbering data.
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How to check a Czechia number
Three steps, no sign-up - pick a country, paste the number, read the result.
-
1
Pick the country
Czechia is already selected - or type the full number with its
+420code. -
2
Enter the number
Paste any phone number. We clean up spaces, dashes and brackets automatically.
-
3
Get the details
Instantly see the country, line type, carrier and whether it's a real mobile or a VoIP line.
Carrier lookup in other countries
Networks, number ranges and number formats for 89 countries.
United States
+1
United Kingdom
+44
Canada
+1
India
+91
Australia
+61
Germany
+49
France
+33
Spain
+34
Italy
+39
Netherlands
+31
Sweden
+46
Brazil
+55
Show all 88 countries
Afghanistan
+93
Azerbaijan
+994
Bahrain
+973
Bangladesh
+880
Barbados
+1
Belgium
+32
Bermuda
+1
Cambodia
+855
Caribbean Netherlands
+599
Cayman Islands
+1
Chile
+56
Colombia
+57
Congo - Brazzaville
+242
Congo - Kinshasa
+243
Croatia
+385
Cyprus
+357
Denmark
+45
El Salvador
+503
Finland
+358
Georgia
+995
Ghana
+233
Greece
+30
Guadeloupe
+590
Guinea
+224
Hong Kong SAR China
+852
Hungary
+36
Iceland
+354
Indonesia
+62
Iran
+98
Iraq
+964
Ireland
+353
Israel
+972
Japan
+81
Kazakhstan
+7
Kenya
+254
Kyrgyzstan
+996
Laos
+856
Latvia
+371
Liberia
+231
Liechtenstein
+423
Malaysia
+60
Mongolia
+976
Nepal
+977
New Zealand
+64
Nigeria
+234
North Macedonia
+389
Norway
+47
Pakistan
+92
Panama
+507
Peru
+51
Poland
+48
Portugal
+351
Romania
+40
Russia
+7
Saudi Arabia
+966
Senegal
+221
Serbia
+381
Sierra Leone
+232
Singapore
+65
Slovakia
+421
Slovenia
+386
Somalia
+252
South Africa
+27
South Sudan
+211
Sri Lanka
+94
St. Pierre & Miquelon
+508
Switzerland
+41
Taiwan
+886
Tajikistan
+992
Tanzania
+255
Thailand
+66
Türkiye
+90
Uganda
+256
Ukraine
+380
Uzbekistan
+998
Vietnam
+84
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Czechia carrier lookup questions
Short, straight answers about what the lookup can and can't tell you.
How do I find out which network a Czechia number is on?
Run it through the lookup above: it checks live carrier and porting records and shows the network the number is on today. The prefix alone tells you which network a number range was first issued to - the table on this page lists them - but a Czechia number can move to another network and keep its digits.
How can I tell if a Czechia number is a mobile?
Mobile numbers in Czechia usually start with +420 6 or +420 7 (6 or 7 when dialled inside Czechia). The lookup confirms it for any number: it shows the line type - mobile, landline or VoIP.
What is the country code for Czechia?
Czechia uses the country code +420. Numbers are dialled the same way inside Czechia, just without the +420.
How do you write a Czechia phone number?
In international format a Czechia mobile number looks like +420 601 123 456, and inside Czechia like 601 123 456. Mobile numbers have 9 digits after the +420. The lookup also gives you the clean E.164 form (no spaces) that apps and SMS systems expect.
Which mobile networks are there in Czechia?
The official numbering data names 34 networks with Czechia number ranges. The ones with the most ranges are T-Mobile, Vodafone, O2 and Tesco Mobile CR. Smaller networks often run on one of those, so a number can show a different carrier name in the live check.
Is the phone carrier lookup really free?
Yes. The lookup is completely free and needs no sign-up or credit card. We cover the cost of the live carrier check, so there are no hidden per-search fees.
Does the person know I looked up their number?
No. The lookup is completely passive - we never call, text or otherwise contact the number, and the carrier check reads routing records rather than reaching the phone, so its owner gets no notification of any kind.