Area Code 605 – Mobile Network
The phone area code for Mobile Network is 605 (international format +420605). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 605
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Overview of +420 605
The +420 605 prefix is a non-geographic mobile network code assigned within the Czech Republic's national numbering plan. Unlike geographic area codes, it does not correspond to any specific city or region. Instead, it is allocated to mobile network operators (MNOs) and mobile virtual network operators (MVNOs) providing cellular services across the entire country. As part of the E.164 numbering plan, the full international number format is +420 605 XXX XXX, where the leading '0' used in domestic dialing is omitted when calling from abroad.
Dialing and Number Format
When dialing a number with the 605 prefix from within the Czech Republic, subscribers use the national trunk prefix '0' followed by the nine-digit subscriber number: 0 605 XXX XXX. From outside the country, callers must use the Czech country code +420, followed directly by the nine-digit number: +420 605 XXX XXX. The total length of a Czech mobile number is always nine digits after the country code, regardless of the operator. This uniform length simplifies international dialing and ensures compatibility across all networks.
Mobile Network Characteristics
Numbers with the 605 prefix are fully portable. This means that a subscriber can retain their number when switching from one mobile operator to another. Consequently, the prefix does not necessarily indicate the current serving network; it only reflects the original allocation. For this reason, routing a call or SMS to a 605 number is handled centrally by the Czech national database, ensuring seamless connectivity even after porting.
Mobile numbers in the Czech Republic support full international voice and SMS services. When sending an SMS to a 605 number from abroad, the message should be addressed to +420 605 XXX XXX. Multimedia messaging (MMS) and mobile data services are also available, but data connectivity is not dependent on the number prefix but rather on the subscriber's plan and network technology (4G/5G).
Caller Instructions
For local callers within the Czech Republic, dialing a 605 number requires the national trunk prefix '0' unless the call is made from a mobile phone, where the '0' is often optional. However, to avoid confusion, it is recommended to always dial the full national number: 605 XXX XXX from any Czech phone. For international callers, the correct format is +420 605 XXX XXX. This applies to both voice calls and SMS. There are no special access codes or additional digits required when calling from abroad.
Regulatory and Cost Considerations
The Czech Telecommunication Office (ČTÚ) oversees the allocation and management of the national numbering plan. Mobile numbers are considered non-geographic, meaning they are not tied to a physical location. This allows users to keep their numbers when moving within the country. Call charges to 605 numbers are typically determined by the caller's own tariff plan; calls from landlines to mobiles are usually charged at a higher rate than calls to geographic numbers. However, many mobile plans include unlimited calls to all Czech mobile networks, making the distinction less relevant for most users.