Area Code 2418 – Oslo
The phone area code for Oslo is 2418 (international format +472418). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 2418
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Oslo
Geographic Scope and Administrative Jurisdiction
The +47 2418 prefix is a geographic National Destination Code (NDC) assigned to the Oslo metropolitan area, Norway's capital and largest city. As part of the Norwegian numbering plan administered by the Norwegian Communications Authority (Nkom), this code falls within the 2x range reserved for geographic services in the capital region. The prefix serves the central business district and surrounding urban districts, including major commercial zones such as Bjørvika, Aker Brygge, and the historic Kvadraturen area. Subscribers under this code include enterprises, government institutions, and residential customers within Oslo's fixed-line network.
Dialing Formats and Caller Instructions
For local callers within Norway, the number is dialed as an 8-digit national significant number: 2418 XXXX. No trunk prefix '0' is used in Norway; instead, callers simply dial the NDC followed by the subscriber number. International callers must replace the leading '+' with their country's international access code (e.g., '00' in most European countries, '011' in North America) and then dial 47 2418 XXXX. For example, a caller from the United States would dial 011 47 2418 XXXX, while a caller from the UK would dial 00 47 2418 XXXX. When dialing from a mobile phone, the '+' sign can be used directly: +47 2418 XXXX.
Overlay and Numbering Considerations
Oslo does not use overlay codes; the entire city shares the country code +47 with all of Norway, which is a unique feature of the Norwegian numbering plan. Geographic numbers are not portable outside their designated exchange area, but fixed-line numbers can be ported between operators within Oslo. Since 1992, Norway has used closed dialing, meaning the full 8-digit number is always dialed locally, eliminating the need for area code distinctions. This simplifies routing but requires all numbers to be unique nationwide.
Usage and Routing
The 2418 prefix is primarily used for fixed-line PSTN and VoIP services. Many businesses choose geographic numbers to establish a local presence, and VoIP providers often offer such numbers with location-independent routing. Calls to +47 2418 numbers are routed via the public switched telephone network and are subject to standard national and international termination charges. For international callers, rates vary by carrier, but calls to geographic numbers are typically less expensive than to mobile or premium services. Emergency services (110, 112, 113) are always free and accessible regardless of the number called.