Area Code 45 – Zvolen
The phone area code for Zvolen is 45 (international format +42145). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 45
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Zvolen
Geographic Overview
The +421 45 area code is a geographic National Destination Code (NDC) assigned to the Zvolen region in central Slovakia. This area encompasses the city of Zvolen and its surrounding districts, including Detva and Krupina. Zvolen, situated at the confluence of the Hron and Slatina rivers, is an important transport and industrial hub. The code serves both residential and business subscribers within this defined geographic area.
Dialing Formats
When calling a landline in the Zvolen region from within Slovakia, subscribers must dial the national trunk prefix 0, followed by the area code 45 and the subscriber's seven-digit local number. For example, a local number might be formatted as 045/XXX XXXX when written in the domestic style.
For international callers, the correct format is the international access prefix (typically +), the country code 421, the area code 45 (without the leading zero), and the seven-digit subscriber number. Thus, a complete international dialing sequence would appear as +421 45 XXX XXXX. It is crucial to omit the trunk prefix '0' when dialing from abroad.
Caller Instructions
Local callers within the Zvolen area can often dial just the seven-digit subscriber number for local calls, depending on the specific telecom operator's dialing plan. However, for calls from other regions in Slovakia, always use the full national format: 045 XXX XXXX.
International callers should replace the leading '0' with the country code and international prefix. For instance, to call a Zvolen number from the United States, one would dial 011 421 45 XXX XXXX (or +421 45 XXX XXXX from a mobile phone).
Overlay and Numbering Considerations
As of the latest ITU-T E.164 national numbering plan updates, there is no overlay code for the Zvolen geographic area. The 045 code remains exclusive to this region. Subscriber numbers within this code are seven digits long, and the total international number length is 12 digits (including the +421 country code).
Number portability allows subscribers to retain their geographic numbers when changing operators, but the number remains associated with the original geographic area. This means that a call to a 045 number will always be routed to the Zvolen region, regardless of the subscriber's current physical location.
Regulatory and Technical Notes
The assignment and management of the +421 45 area code are overseen by the Slovak Regulatory Authority for Electronic Communications and Postal Services (RU). This code is designated for fixed-line PSTN and VoIP services that are tied to a physical address within the Zvolen area. It is not used for mobile services, which are assigned separate non-geographic prefixes.