Area Code 37 – Kaunas
The phone area code for Kaunas is 37 (international format +37037). 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 Kaunas
Geographic Coverage and Administrative Jurisdiction
The +370 37 numbering block is the National Destination Code (NDC) for the city of Kaunas, Lithuania's second-largest municipality and the administrative center of Kaunas County. The geographic area served by this prefix encompasses the city proper and its immediate suburban districts, including residential neighborhoods such as Žaliakalnis, Šančiai, and Petrašiūnai, as well as the industrial zones along the Nemunas River. As a geographic code, +370 37 is assigned to fixed-line PSTN services, and its use is restricted to subscribers physically located within the defined exchange area. The code is administered by the Communications Regulatory Authority of the Republic of Lithuania (RRT) under the national numbering plan aligned with ITU-T E.164.
Dialing Formats and Caller Instructions
For domestic callers within Lithuania, the national significant number (NSN) for Kaunas numbers is eight digits long, beginning with the trunk prefix '0' followed by the NDC '37' and a five-digit subscriber number. For example, a local Kaunas number might be dialed as 0 37 12345 from elsewhere in Lithuania. When calling from abroad, the international format requires the country code '+370', the NDC '37', and the five-digit subscriber number, omitting the trunk prefix: +370 37 12345. Callers within the Kaunas area may often use seven-digit local dialing (the five-digit subscriber number preceded by the local exchange code) without the trunk prefix, depending on the incumbent operator's dialing plan. However, for clarity and to avoid misdialing, it is recommended to always use the full national or international format.
Overlay and Numbering Considerations
Currently, no overlay code has been introduced for Kaunas; the 37 NDC remains the sole geographic code for the city. The subscriber number portion within the 37 block is allocated to various fixed-line operators, including Telia Lietuva and alternative carriers. Number portability is available for fixed-line services, meaning a subscriber may retain their +370 37 number when switching providers, but the number remains associated with the geographic Kaunas area. It is important to note that while VoIP services can be assigned geographic numbers, the physical location of the caller may not correspond to the area code if the service is nomadic; however, for regulatory and emergency call routing, the address associated with the number is used.
Practical Usage and Business Implications
For businesses, having a +370 37 number establishes a local presence in Kaunas, which can enhance customer trust and local engagement. International callers should be aware that calling a Kaunas number from abroad will incur international tariffs, while domestic callers may be subject to standard fixed-line rates. When dialing from a mobile phone within Lithuania, it is common to use the national format with the trunk prefix. For any caller, ensuring the correct use of the plus sign (+) and country code is essential for successful international connectivity.