Area Code 51 – South Moravian Region
The phone area code for South Moravian Region is 51 (international format +42051). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 51
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of South Moravian Region
Overview of Czechia Area Code +420 51
Area code 51 is a geographic National Destination Code (NDC) within the Czech public switched telephone network (PSTN), assigned under the international country calling code +420. It serves the South Moravian Region (Jihomoravský kraj) in the southeastern part of the Czech Republic. The region is administratively centered in Brno, the country’s second-largest city, and includes districts such as Blansko, Břeclav, Hodonín, Vyškov, and Znojmo.
Geographic numbers with the 51 prefix are used for fixed-line services, including PSTN and VoIP-based fixed telephony. They are allocated to local operators and are subject to number portability within the Czech Republic. The prefix is not tied to a specific operator; subscribers may retain their number when switching providers.
Dialing Formats
When dialing from within the Czech Republic, the national trunk prefix 0 is not used. The full national number consists of the NDC (51) followed by a subscriber number, resulting in a total of 9 digits (excluding the international +420). For example, a typical Brno landline might be formatted as 51 234 5678.
For international callers, the number must be dialed in international format: +420 51 234 5678. The leading plus sign indicates the international access code; alternatively, callers can use the international prefix of their country (e.g., 00 from most European countries) followed by 420 and the number.
Geographic Coverage and Local Significance
The 51 area code covers the entire South Moravian Region, including the city of Brno and its surrounding metropolitan area. Brno is a major industrial, judicial, and educational hub, hosting numerous multinational corporations and universities. The region is also known for its wine-producing areas, particularly around Mikulov and Znojmo.
Because the code is geographic, it is used for fixed-line services. Mobile numbers in the Czech Republic use separate non-geographic prefixes (e.g., 601–608, 73–79) and are not affected by this area code. However, VoIP providers may offer numbers with the 51 prefix to businesses or residents who wish to have a local presence in the region, regardless of their physical location.
Overlay and Numbering Plan Considerations
The Czech numbering plan is closed, with no trunk prefix. The 51 prefix is part of a larger numbering range; adjacent geographic codes include 49 (Zlín Region) and 53 (Pardubice Region). There are no overlay codes for Brno; the 51 prefix is the sole geographic code for the region. Subscriber numbers within the 51 range vary in length, but the total national number length is always 9 digits.
For callers, it is important to note that when dialing from abroad, the leading zero (if any) is omitted. Also, when receiving calls from outside the Czech Republic, the caller ID will display the number in international format (+420 51...).
Practical Guidance for Callers
- Local calls within the South Moravian Region: Dial the 9-digit national number directly (e.g., 51 234 5678).
- Calls from other Czech regions: Dial the same 9-digit number; no trunk prefix is required.
- International calls to the region: Dial your country’s international access code (e.g., 00, 011) or the plus sign, then 420, followed by the 9-digit number.
- When saving contacts: Always store the number in international format (+420 51 234 5678) to ensure proper dialing from any location.