Area Code 304 – Orust-Tjörn

Geographic Coverage and Administrative Jurisdiction

The Swedish area code 0304 is a geographic National Destination Code (NDC) allocated to the Orust-Tjörn region, situated on the western coast of Sweden in Västra Götaland County. This code serves the municipalities of Orust and Tjörn, which are connected to the mainland via bridges. Key localities include Henån, Ellös, Svanesund (on Orust), and Kållekärr, Skärhamn, Käringön (on Tjörn). The area is known for its archipelago, maritime industries, and tourism.

Dialing Formats and Number Structure

When calling a landline in this region from within Sweden, the national trunk prefix 0 is used, followed by the area code and the subscriber number. The complete national format is 0 304 XX XX XX. For international callers, the country code +46 replaces the leading zero, resulting in +46 304 XX XX XX. Subscriber numbers in the 0304 area typically consist of 6 digits, making the total number length 9 digits (including the leading zero) in national format.

Overlay and Numbering Plan Considerations

As of the latest ITU-T E.164 national numbering plan, the 0304 area code does not have an overlay code. The region is served exclusively by this code, and local calls within the same area code can be made using the 6-digit subscriber number without dialing the area code. However, for calls from other Swedish regions or from abroad, the full national or international format is required.

Caller Instructions

Local callers within Orust-Tjörn can dial the 6-digit subscriber number directly for local calls. National callers from other parts of Sweden must dial 0304 followed by the subscriber number. International callers should dial the international access prefix (e.g., 00 from most countries) followed by 46, then 304 and the subscriber number, omitting the leading zero.

Example

To call a number in Henån, Sweden, from the United States, you would dial: 011 46 304 12 34 56. From within Sweden (outside the area), dial 0304 12 34 56.