Area Code 5517 – Riezlern
The phone area code for Riezlern is 5517 (international format +435517). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 5517
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Riezlern
Overview of Area Code 5517
Austrian area code +43 5517 is a geographic destination code assigned to the westernmost part of the country. It serves the municipality of Riezlern, located in the Kleinwalsertal valley, which is part of the state of Vorarlberg. Although the valley is geographically accessible only from Germany, it remains sovereign Austrian territory and uses the Austrian national numbering plan. The code covers Riezlern and its immediate surroundings, including the hamlets of Hirschegg and Mittelberg (the latter is served by a separate code, 5518, but the local exchange area is closely interconnected).
Geographic Coverage and Administrative Jurisdiction
Riezlern is the principal settlement in the Kleinwalsertal, a popular alpine tourism region. The area code 5517 is administered under the Vorarlberg telecommunications region, which is part of the Austrian regulatory framework overseen by the Rundfunk und Telekom Regulierungs-GmbH (RTR). The code is used for fixed-line services, including PSTN and VoIP lines that are registered to a physical address within the Riezlern exchange area. Because of the valley's unique geographic position, calls to and from Germany are subject to special international tariffs, even though the distance may be short.
Dialing Formats
For callers within Austria, the national trunk prefix 0 must be dialed before the area code. Thus, a local number in Riezlern is dialed as:
- 0 5517 [subscriber number] (national format)
From abroad, callers must use the Austrian country code +43, omitting the leading zero of the area code. The international format is:
- +43 5517 [subscriber number]
Subscriber numbers in this area typically have 4 to 5 digits, making the total number length (excluding trunk prefix) between 8 and 9 digits. For example, a local number might be 5517 1234 (national) or +43 5517 1234 (international).
Caller Instructions
Local callers: If you are within the Riezlern exchange area, you may be able to dial the subscriber number directly without the area code, depending on your local service provider. However, for clarity and to avoid misdialing, it is recommended to always use the full national format.
International callers: When calling from outside Austria, replace the international access code (e.g., 00 from most of Europe, 011 from North America) with your country's exit code, then dial 43, then 5517, and then the subscriber number. Do not dial the leading zero.
Overlay and Numbering Considerations
As of the latest ITU-T E.164 national numbering plan updates, there is no overlay code for the Riezlern area. The code 5517 is exclusively assigned to the geographic area described. Number portability is available in Austria, meaning that a subscriber may retain their number when changing providers, but the geographic significance of the code remains tied to the original location.