Area Code 12 – Vienna
The phone area code for Vienna is 12 (international format +4312). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 12
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Vienna
Overview of Austria's Area Code 12
Austria's area code 12 is a geographic prefix assigned to the capital city, Vienna (Wien). It is used for landline telephone numbers within the city and its immediate metropolitan area. The code is part of Austria's national numbering plan, which adheres to ITU-T E.164 standards. Vienna's telephone numbers are structured as +43 12 XXX XXXX when dialed from abroad, and 01 2 XXX XXXX when dialed domestically (the leading '0' is the national trunk prefix).
Geographic Coverage and Administration
Area code 12 covers the entire federal state of Vienna, which is both a city and a state. It includes all 23 municipal districts, from Innere Stadt (1st district) to Liesing (23rd district). The prefix is administered by the Austrian Regulatory Authority for Broadcasting and Telecommunications (RTR-GmbH), which oversees number allocation to local fixed-line operators such as A1 Telekom Austria, Magenta Telekom, and various alternative carriers.
Dialing Formats and Instructions
- Domestic calls (within Austria): Dial 01 2 XXX XXXX. The leading '0' is the trunk prefix used to access the national network.
- International calls (from abroad): Dial your country's exit code (e.g., 011 from the US, 00 from most European countries), then 43 1 2 XXX XXXX. Note that the national trunk prefix '0' is omitted.
- Local calls (within Vienna): Even for local calls, the full number including the area code is typically required, as Austria uses closed dialing plans. For example, to call a Vienna number from a Vienna landline, you must still dial 01 2 XXX XXXX.
Overlay and Numbering Considerations
Vienna does not have an overlay code; area code 12 is the sole geographic code for the city. However, due to the high demand for numbers, the RTR has implemented number pooling and portability. Subscribers can retain their Vienna numbers when switching operators, which means the prefix does not necessarily indicate the physical location of the line but rather the original assignment. This is particularly relevant for VoIP services, which may use geographic numbers without a fixed location.
Practical Examples
Suppose you are calling a Vienna-based business with the local number 2 345 678. To reach it from the United States, you would dial 011 43 1 2 345 678. From Germany, you would dial 00 43 1 2 345 678. Within Austria, you would dial 01 2 345 678. Always verify the number length, as Vienna numbers typically have 8 digits after the area code (including the leading '2' of the subscriber number).
Conclusion
Area code 12 is a vital part of Austria's telecommunications infrastructure, serving the political, economic, and cultural heart of the country. Understanding its dialing rules is essential for both domestic and international callers to ensure seamless connectivity with Vienna's millions of residents and businesses.