Area Code 505 – Karlsborg

Overview of Area Code 505 (Karlsborg, Sweden)

Area code 505 is a geographic National Destination Code (NDC) assigned to the town of Karlsborg and its surrounding administrative area in Västra Götaland County, Sweden. Under the Swedish national numbering plan, geographic area codes are allocated by the Swedish Post and Telecom Authority (PTS) according to ITU-T E.164 recommendations. The code 505 serves the Karlsborg Municipality, which includes the central locality of Karlsborg, as well as smaller communities and rural areas around Lake Vättern, notably near the Karlsborg Fortress and the Vättern shoreline.

Karlsborg is part of the Skaraborg region, and its local telephone network is integrated into the Swedish PSTN/ISDN infrastructure. The geographic area code indicates that the subscriber lines are physically connected to local exchanges within the Karlsborg rate center, although modern VoIP and fixed wireless services may also use this code without a strict physical location.

Dialing Formats

When calling a Karlsborg number from within Sweden, the national trunk prefix 0 is used before the area code, followed by the subscriber number. The complete national format is:

• 0 505 XX XX XX (where XX XX XX is the 6-digit local subscriber number)

For international callers, the Swedish country code +46 replaces the leading 0, and the area code is written without the trunk prefix. The international dialing format is:

• +46 505 XX XX XX

For example, a local number in Karlsborg might be dialed as 0505-123 456 domestically, or +46 505 123 456 from abroad. Note that the area code and subscriber number are often separated by a hyphen or space for readability, but the actual dialing sequence is continuous.

Geographic Coverage and Administration

The 505 area code serves the entire Karlsborg Municipality, which is part of Västra Götaland County. The main urban center is Karlsborg, located on the western shore of Lake Vättern. The municipality is known for the Karlsborg Fortress, a major historical landmark, and the area includes the smaller localities of Forsvik and Mölltorp. The code is administered by the incumbent operator Telia, but due to local loop unbundling, other operators may also provide services using this code.

Dialing Instructions

For local callers within Sweden: To call a Karlsborg number from another Swedish region, dial the trunk prefix 0, then the area code 505, followed by the 6-digit subscriber number. For example, 0505-123 456.

For international callers: Dial your country's international access code (e.g., 00 from most European countries, 011 from North America), then Sweden's country code 46, then the area code 505 (without the leading 0), and finally the subscriber number. For example, from the US, dial 011 46 505 123 456.

There are no known overlay codes or area code changes affecting 505, and the numbering area remains stable under the Swedish numbering plan.