Area Code 33 – Trnava
The phone area code for Trnava is 33 (international format +42133). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 33
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Trnava
Geographic Overview
The +421 33 country code and area code combination designates the Trnava geographic numbering area within the Slovak Republic. Trnava is a regional capital located in western Slovakia, approximately 45 kilometers northeast of Bratislava. The area code covers the city of Trnava and its surrounding administrative district (Okres Trnava), which includes municipalities such as Hlohovec, Leopoldov, and Šúrovce. The region is an important industrial and agricultural hub, with a growing population and significant transportation infrastructure.
Dialing Formats
For callers within Slovakia, the national trunk prefix '0' is used before the area code. The complete national dialing format is 0 33 XXX XXXX, where '0' is the trunk prefix, '33' is the area code, and the subscriber number is seven digits long. For example, a local number in Trnava might be dialed as 033 123 4567 from within the country.
For international callers, the format is +421 33 XXX XXXX (or 00421 33 XXX XXXX when using the international access prefix from many countries). The leading '0' is omitted when dialing from abroad. For instance, to call a Trnava number from the United States, you would dial 011 421 33 123 4567.
Geographic Allocation and Numbering
This is a geographic area code, meaning the number is tied to a physical location and is typically used for fixed-line (PSTN) services. The Slovak Telecommunication Office (Úrad pre reguláciu elektronických komunikácií a poštových služieb) administers the national numbering plan, and numbers with the 33 prefix are allocated to fixed network operators serving the Trnava region. However, due to number portability, a number with this prefix may be routed to a different operator or even a VoIP service, but the geographic association remains for administrative purposes.
Overlays and Numbering Plan Considerations
Currently, there is no overlay area code for Trnava; the 33 code is the sole geographic code for the region. The subscriber number length is seven digits, which is standard for Slovak fixed-line numbers. When dialing locally within the same area code, callers may sometimes omit the area code and trunk prefix, but it is recommended to always use the full national format to avoid confusion, especially with mobile numbers.
Caller Instructions
- Local callers (within Trnava): Dial the seven-digit subscriber number directly (e.g., 123 4567).
- National callers (from other Slovak regions): Dial 0, then the area code 33, then the subscriber number (e.g., 033 123 4567).
- International callers: Dial your country's exit code (e.g., 00 or 011), then Slovakia's country code 421, then the area code 33 (without the leading 0), then the subscriber number (e.g., +421 33 123 4567).
When dialing from a mobile phone, it is advisable to use the international format (+421 33 ...) to ensure proper routing, especially when roaming.
This area code is not associated with premium-rate or special services; it is strictly for geographic fixed-line communications. For emergency services, always dial the national emergency numbers (112 or 150/155) regardless of the area code.