Area Code 37 – Nitra
The phone area code for Nitra is 37 (international format +42137). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 37
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Nitra
Geographic Coverage and Administrative Jurisdiction
The +421 37 area code is a geographic National Destination Code (NDC) assigned to the Nitra region in western Slovakia. It serves the city of Nitra, the administrative center of the Nitra Region, as well as surrounding districts including Šaľa, Zlaté Moravce, and parts of Levice and Topoľčany. The code covers a mix of urban and rural areas, with Nitra being the primary economic and cultural hub.
Dialing Formats and Usage
Within Slovakia, calls to numbers in the +421 37 area code require dialing the national trunk prefix 0 followed by the area code and the subscriber number. For example, a local call to a Nitra landline would be dialed as 037 123 4567. When calling from abroad, the international format is used: +421 37 123 4567 (or 00421 37 123 4567 from countries using the international prefix 00). The subscriber number length is typically 7 digits, making the total national significant number (NSN) 9 digits (including the leading 0 for domestic calls).
Overlay and Numbering Considerations
Currently, there is no overlay code for the Nitra area; the 37 code is exclusively used for geographic numbers in this region. However, number portability allows subscribers to retain their Nitra numbers when switching to a different operator, even if they move outside the geographic area. This means that a number with the 37 prefix may not always be physically located in Nitra, but it remains associated with the original rate center for billing and administrative purposes.
Caller Instructions
Local callers within the Nitra area can dial the subscriber number directly without the area code if they are in the same local calling area. However, for clarity and to avoid misdialing, it is recommended to always use the full national format. International callers should replace the leading zero with the country code +421 and dial the area code without the zero. For example, to call a Nitra number from the United States, dial 011 421 37 123 4567.
As with all geographic codes in Slovakia, calls to +421 37 numbers are typically charged at standard landline rates, which may vary depending on the caller's operator and subscription plan. VoIP and mobile users should ensure they have international calling enabled if dialing from abroad.