Area Code 57 – Zlín Region

Geographic Overview

The +420 57 area code is a geographic National Destination Code (NDC) assigned to the Zlín Region (Zlínský kraj) in the eastern part of the Czech Republic. This administrative region is known for its industrial heritage, particularly in the footwear and machinery sectors, and includes the city of Zlín, the regional capital, along with other significant towns such as Kroměříž, Uherské Hradiště, Vsetín, and Valašské Meziříčí. The code covers a substantial portion of the historical region of Moravia.

Dialing Formats

When dialing a number within the Czech Republic, the national trunk prefix '0' is not used; instead, callers dial the full 9-digit national significant number (NSN), which begins with the area code '57'. For example, a local number in Zlín might be formatted as +420 57 123 4567 from abroad, or 57 123 4567 when dialed domestically. The area code is an integral part of the subscriber number, and there is no separate local dialing format; all calls within the country require the full NSN.

Geographic Coverage and Numbering

The 57 NDC encompasses several telephone exchanges that serve both urban and rural communities across the Zlín Region. Subscriber numbers within this code typically have 7 digits after the country code, resulting in a total length of 9 digits for the NSN. The numbering plan follows the ITU-T E.164 recommendation, and the Czech Telecommunication Office (ČTÚ) administers the allocation of numbers to operators.

Calling Instructions

• Local callers (within the Czech Republic): Dial the 9-digit NSN directly, e.g., 57 123 4567. No trunk prefix is required.
• International callers (from outside the Czech Republic): Dial the international access prefix (00 or +), then the Czech country code 420, followed by the NSN without any leading zero, e.g., +420 57 123 4567.

Overlays and Number Portability

As of the current numbering plan, there is no overlay code for the Zlín Region; the 57 code is the sole geographic code for the area. However, number portability is fully implemented in the Czech Republic, meaning that a subscriber may retain their 57 number even if they move to a different geographic region or switch to a VoIP or mobile service. This can occasionally lead to a number no longer being strictly tied to a physical location, but for the most part, 57 numbers remain associated with the Zlín Region.

Practical Considerations

For businesses and residents in the Zlín Region, having a 57 number reinforces a local presence and can be important for customer trust. For callers, it is essential to use the correct international format when dialing from abroad to avoid misrouting. The Czech Republic uses a closed numbering plan, so all national numbers, including mobile and non-geographic services, are dialed with the same 9-digit NSN format.