Area Code 7723 – Altheim
The phone area code for Altheim is 7723 (international format +437723). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 7723
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Altheim
Geographic Overview
Austria's country calling code +43 is followed by a National Destination Code (NDC) that routes calls to specific geographic areas. The prefix 7723 is assigned to the town of Altheim, located in the western part of Upper Austria (Oberösterreich), within the district of Braunau am Inn. This area lies near the border with Germany and is part of the Innviertel region. The geographic numbering area covered by 7723 includes Altheim itself and several surrounding municipalities, such as St. Johann am Walde, Moosbach, and parts of the Innviertel countryside.
Dialing Formats
When calling a landline in Altheim from within Austria, you must use the trunk prefix 0 followed by the area code and the subscriber number. The local subscriber numbers in this area typically consist of 6 to 7 digits, making the total national significant number (NSN) length 9 to 10 digits (including the leading 0). For example, a local number might be 7723 45678.
- National dialing (within Austria): Dial 0 7723 45678.
- International dialing (from abroad): Dial your country's exit code (e.g., 00 from most European countries, 011 from North America), then 43 7723 45678.
When dialing from a mobile phone within Austria, the same national format applies (0 7723 ...). If you are calling from outside Austria, remember to omit the leading '0' of the area code and use +43 instead.
Regulatory and Technical Notes
Austria's numbering plan is administered by the Rundfunk und Telekom Regulierungs-GmbH (RTR). Geographic area codes are assigned to fixed-line operators, but due to number portability, a number with the 7723 prefix may be routed to a VoIP service or a mobile network if the subscriber has ported their number. However, the tariff and routing generally remain based on the original geographic assignment. As of the latest updates, there are no overlay codes in this region, so the 7723 prefix is unique to Altheim and its vicinity.
For callers within Austria, calls to 7723 numbers are typically charged at standard fixed-line rates, depending on the operator and the time of day. International callers should check with their service provider for applicable international rates.