Area Code 4255 – Arnoldstein

Overview of Area Code 4255

Austria's area code 4255 is a geographic National Destination Code (NDC) assigned to the municipality of Arnoldstein and its surrounding communities in the state of Carinthia (Kärnten). This code is part of the Austrian telephone numbering plan, which adheres to ITU-T E.164 recommendations. The region is situated in the southern part of Austria, near the borders with Italy and Slovenia, and is known for its scenic landscape along the Gail River.

Geographic Coverage and Jurisdiction

The 4255 area code covers the political district of Villach-Land, specifically the market town of Arnoldstein and its cadastral communities, including Pöckau, Seltschach, and St. Leonhard bei Siebenbrünn. The code is administered by the Austrian Regulatory Authority for Broadcasting and Telecommunications (RTR-GmbH), which oversees the national numbering plan. Calls to this area are routed via the public switched telephone network (PSTN) and are considered local calls within the Carinthian region, though they may be subject to different tariffs depending on the caller's location and service provider.

Dialing Formats and Instructions

For callers within Austria, the national trunk prefix 0 is used before the area code. Thus, a local number in Arnoldstein is dialed as:

• 0 4255 xxxxx (national format)

For international callers, the Austrian country code +43 replaces the leading zero. The international format is:

• +43 4255 xxxxx

Local numbers within the 4255 area code typically have 5 to 7 digits after the area code, depending on the specific line and historical allocation. When dialing from a mobile phone, the same international or national format applies, but callers should note that mobile numbers in Austria do not use geographic area codes.

Overlay and Numbering Considerations

As of the latest numbering plan updates, there is no overlay code for 4255; the area code is exclusively used for Arnoldstein and its immediate surroundings. However, number portability allows subscribers to retain their 4255 numbers when switching between fixed-line operators, which may result in calls being routed to different networks. For businesses and residents, it is essential to include the area code when dialing from outside the local area, even if the call originates from a nearby town with a different code.

Practical Tips for Callers

When placing a call to Arnoldstein from abroad, always use the international prefix of your country (e.g., 00 from most European countries, 011 from the United States) followed by 43 and the area code without the leading zero. For example, a call from the UK to a number 12345 in Arnoldstein would be dialed as 00 43 4255 12345. If you are within Austria but outside the 4255 area, dial 0 4255 12345. Always verify the number length, as some older lines may have fewer digits. For emergency services, use the national emergency numbers (112 or 133/144), which are independent of area codes.