Area Code 606 – Mobile Network
The phone area code for Mobile Network is 606 (international format +420606). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 606
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Overview of the +420 606 Prefix
The +420 606 prefix is a non-geographic mobile network code assigned within the Czech Republic's national numbering plan. It is used exclusively for mobile services, meaning the number is not tied to any specific region or city. The prefix is part of the +420 country calling code, which is used for all calls to Czech landlines and mobiles. The 606 prefix is operated by a mobile network operator (MNO) or mobile virtual network operator (MVNO) and is used for voice, SMS, and data services.
Number Format and Dialing
Czech mobile numbers are nine digits long, including the leading '6' that identifies mobile services. The format is: +420 606 XXX XXX. When dialing from abroad, you must use the international format: +420 606 XXX XXX. When dialing from within the Czech Republic, you can dial the number in national format: 606 XXX XXX (the leading '0' is not used because the Czech Republic uses the European Union's international dialing prefix '00' for international calls, and the national trunk prefix '0' is not used for mobile numbers). The 606 prefix is not geographic, so there is no local dialing format; the number is always dialed in full.
Mobile Network Operator and Porting
The 606 prefix is allocated to a specific mobile operator, but due to mobile number portability (MNP), the prefix does not guarantee that the subscriber is still with the original operator. If you call a 606 number, the call will be routed to the current network of the subscriber. This is important for both local and international callers to understand, as the prefix may not reflect the actual service provider.
International Calling
For international callers, the dialing sequence is: international access code (e.g., 011 from the US, 00 from most European countries) + 420 (Czech country code) + 606 + the subscriber's seven-digit number. For example, to call a number like +420 606 123 456, you would dial 011 420 606 123 456 from the US. Calls to Czech mobile numbers are typically charged at higher rates than landline calls, depending on your carrier's international tariff.
Usage and Services
The 606 prefix is used for standard mobile services, including voice calls, SMS, MMS, and mobile internet. It is also used for IoT (Internet of Things) devices and machine-to-machine (M2M) communications, as many MNOs allocate specific ranges for such services. The prefix is not used for toll-free or premium-rate services, which have their own dedicated codes in the Czech numbering plan.
Regulatory Context
The Czech Telecommunication Office (ČTÚ) manages the national numbering plan in accordance with ITU-T E.164 recommendations. The 606 prefix is part of the mobile number range starting with '6', which is reserved for mobile services. The allocation of prefixes is done in blocks, and operators must comply with strict regulations to ensure efficient use of numbering resources.