Area Code 17 – Vienna
The phone area code for Vienna is 17 (international format +4317). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 17
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Vienna
Geographic Overview
Austrian area code 17 is a geographic National Destination Code (NDC) assigned to the capital city, Vienna (Wien). It serves the entire federal state of Vienna, including all 23 municipal districts (Bezirke) and surrounding suburban areas that fall within the city's administrative boundaries. As the country's political, economic, and cultural hub, Vienna hosts numerous government institutions, corporate headquarters, and international organizations, making this code highly relevant for both business and residential communications.
Dialing Formats
When calling a Vienna landline from within Austria, you must include the trunk prefix 0 followed by the area code and the subscriber number. The national format is:
0 17 [subscriber number]
For example, a local Vienna number might be dialed as 01 234 5678 (where 2345678 is the local number). Note that the leading 0 is dropped when calling from abroad. The international format becomes:
+43 1 [subscriber number]
Thus, the same number would be dialed as +43 1 234 5678 from any other country.
Local vs. International Calls
Within Vienna, callers can often dial just the subscriber number without the area code for local calls, depending on their telephone service provider. However, for clarity and to avoid misdials, it is recommended to always use the full national format. For callers outside Austria, the international access code of their country (e.g., 00 from most European countries, 011 from the United States) must be used before the country code 43, followed by 1 and the subscriber number.
Overlay and Numbering Considerations
Vienna does not currently have an overlay area code; the 1 code is exclusively used for the capital. Subscriber numbers in Vienna can vary in length, typically ranging from 7 to 8 digits, depending on the historical allocation and the operator. The total length of a national significant number (NSN) for Austrian geographic numbers is usually 9 to 10 digits, including the leading 0.
Important Notes for Callers
- Always replace the leading 0 with +43 when dialing from a mobile phone abroad.
- Some VoIP and mobile providers may require the full national number even for local calls; check your service provider's guidelines.
- Numbers beginning with 01 are geographic landlines; they are not mobile or premium-rate services.