Area Code 7764 – Riedau
The phone area code for Riedau is 7764 (international format +437764). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 7764
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Riedau
Geographic Overview
The Austrian area code +43 7764 is a geographic National Destination Code (NDC) assigned to the Riedau telephone exchange area, located in the western part of Upper Austria (Oberösterreich). This numbering area covers the market town of Riedau and its surrounding communities, including parts of the Sauwald region and the Innviertel. The administrative jurisdiction falls under the district of Schärding, and the code serves both residential and business subscribers within this rural catchment.
Dialing Formats
When calling a landline in the Riedau area from within Austria, the trunk prefix 0 is dialed before the area code, followed by the subscriber number. The local number length varies, typically between 5 and 7 digits, resulting in a total national significant number (NSN) length of 9 to 11 digits (including the leading 0). For example, a local number might be formatted as 07764 12345.
From outside Austria, callers must use the international prefix (e.g., 00 or +) followed by the country code 43, then the area code 7764 without the leading zero, and finally the subscriber number. An international call would be dialed as +43 7764 12345.
Caller Instructions
- Local callers (within Austria): Dial 07764 followed by the subscriber number. If you are calling from a mobile phone, the same format applies.
- International callers: Dial your country's exit code (e.g., 011 from North America), then 43, then 7764, and the subscriber number. Omit the leading zero of the area code.
Overlay and Numbering Considerations
As of the latest ITU-T E.164 national numbering plan updates, there is no overlay code for the Riedau area. The geographic code 7764 is exclusively assigned to this exchange, and number portability allows subscribers to retain their numbers when changing providers within Austria, but the geographic significance remains tied to the original location.
Businesses in the region often use this code to establish a local presence, and callers should be aware that rates for calling this number depend on their telecom provider and whether the call is made from a fixed line or mobile network.