Area Code 16 – Vienna
The phone area code for Vienna is 16 (international format +4316). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 16
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Vienna
Geographic Scope and Regulatory Framework
The Austrian country calling code +43 is governed under the national numbering plan administered by the Rundfunk und Telekom Regulierungs-GmbH (RTR), in alignment with ITU-T E.164 recommendations. The prefix 16 is a geographic National Destination Code (NDC) allocated to the capital city, Vienna (Wien). This code serves the entire federal state of Vienna, including the historical districts and surrounding urban agglomerations that form the Viennese metropolitan area. As a geographic code, +43 16 is tied to the PSTN (Public Switched Telephone Network) and is used for fixed-line services, though it may also be assigned to VoIP providers offering location-based numbers.
Dialing Formats and Usage
When dialing a Vienna number from within Austria, the national trunk prefix 0 is used, followed by the NDC and the subscriber number. The format is: 0 16 XXX XXXX (where X represents the local subscriber digits). For example, a typical Vienna fixed-line number might appear as 01 234 5678 in national format. From abroad, callers must replace the leading 0 with the Austrian country code +43, resulting in the international format: +43 1 234 5678 or +43 1 234 5678 (without spaces). It is crucial to omit the leading 0 when dialing internationally.
Vienna numbers are generally 9 to 10 digits long in international format (including the country code but excluding the +). The subscriber number length can vary, but the total length after the country code is typically 9 digits (e.g., +43 1 234 5678).
Overlay and Numbering Considerations
Vienna has not implemented an overlay code; the 01 area code remains exclusive to the city. However, due to number portability, a subscriber may retain a 01 number even if they move to a different region or switch to a VoIP provider. Conversely, numbers from other Austrian area codes can be ported into Vienna. Callers should be aware that the prefix 01 is not a mobile code; mobile numbers in Austria begin with 06xx (e.g., 0664, 0699) and are non-geographic.
Caller Instructions
- Local callers (within Austria): Dial 01 followed by the subscriber number. Example: 01 234 5678.
- International callers: Dial the international access prefix (e.g., 00 from most countries, or +), then 43, then 1, then the subscriber number. Example: +43 1 234 5678.
- VoIP users: Ensure that your service provider supports geographic numbering; you may need to include the area code even for local calls.
For businesses, having a Vienna number (01) can enhance local presence and trust. For tourists or expatriates, understanding this format is essential for reaching local services, hotels, and government offices.