Area Code 35 – Telemark

Overview of Area Code 35 (Telemark, Norway)

Area code 35 is a geographic National Destination Code (NDC) assigned to the Telemark region in southern Norway. It covers the traditional county of Telemark, including the administrative center Skien, as well as the municipalities of Porsgrunn, Bamble, Notodden, Rjukan, and surrounding areas. The code is used for fixed-line (PSTN) and some VoIP-based local telephony services. Telemark is known for its industrial heritage and scenic landscapes, and the area code serves a mix of urban and rural communities.

Dialing Formats

• National dialing (within Norway): Dial 35 followed by the 6-digit subscriber number. For example, to call a fixed line in Skien, dial 35 00 00 00.
• International dialing (from abroad): Dial the international access prefix (e.g., 00 or +), then Norway's country code 47, then the area code and subscriber number without the leading 0. For example, from the US, dial 011 47 35 00 00 00 or +47 35 00 00 00.

Geographic Coverage and Administration

The 35 code is administered by the Norwegian Communications Authority (Nkom) and is allocated to geographic numbering. It covers the former Telemark county, which is now part of the larger Vestfold og Telemark county (administrative reorganization in 2020). Key cities and towns within this area code include Skien (the county seat), Porsgrunn, Bamble, Notodden, Rjukan, Kragerø, and Langesund. The region is served by several local exchange areas, and the code is used for both residential and business fixed-line services.

Overlay and Numbering Considerations

Norway does not use area code overlays for fixed-line services; each geographic region has a unique NDC. The number length for fixed lines in Norway is 8 digits total (including the area code), so a local number in the 35 area is 8 digits long. When dialing within the same area code, it is possible to omit the area code in some local calling scenarios, but the recommended format is to always include the full national number (8 digits) for clarity, especially for VoIP and mobile users.

Caller Instructions

• Local callers (within Telemark): Dial the 8-digit number directly (e.g., 35 00 00 00).
• National callers (from other parts of Norway): Dial 35 followed by the 6-digit subscriber number (e.g., 35 00 00 00).
• International callers: Use the country code +47 and then the 8-digit national number (e.g., +47 35 00 00 00).

It is important to note that Norway's country code +47 is shared by all fixed and mobile numbers, and there is no trunk prefix (like 0) used in international dialing. When calling from abroad, you must include the area code and subscriber number directly after the country code.