Area Code 2368 – Oslo
The phone area code for Oslo is 2368 (international format +472368). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 2368
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Oslo
Geographic Coverage and Administrative Jurisdiction
The +47 2368 prefix is a geographic National Destination Code (NDC) assigned to the Oslo metropolitan area, Norway's capital and largest city. This code falls within the 23xx range, which is specifically allocated for fixed-line services in Oslo and the surrounding county (Oslo kommune). The coverage area includes the central business district, residential neighborhoods, and key administrative institutions, encompassing both the historic city center and modern urban developments. As part of the Norwegian numbering plan, this prefix is used exclusively for PSTN (Public Switched Telephone Network) and fixed VoIP services that are registered to physical addresses within this jurisdiction.
Dialing Formats and Caller Instructions
For international callers, the correct format is +47 2368 XXXX (or 0047 2368 XXXX from most countries). Within Norway, callers must dial the full national number: 23 68 XX XX. The prefix is not an overlay code; it is a unique geographic code, so no additional area code is required when dialing locally. When calling from a mobile phone within Norway, the same 8-digit national number (2368 XXXX) is used. For callers outside Norway, the leading zero (if any) is omitted; Norway uses the international prefix +47, and there is no trunk prefix '0' in the Norwegian numbering plan.
Numbering and Routing Details
Numbers under this prefix have a total length of 8 digits (including the NDC), which is standard for Norwegian fixed-line numbers. The prefix is administered by the Norwegian Communications Authority (Nkom) and is allocated to specific operators providing fixed-line services. Number portability is available, meaning that a subscriber may retain their 2368 number when switching providers, but the geographic association remains tied to the original exchange area. This prefix is not used for mobile services, which are identified by other NDCs such as 4, 9, and certain 5-series numbers.
Practical Usage and Examples
Businesses and residents in Oslo use this prefix for landlines, fax lines, and VoIP services that require a local presence. For example, a company headquartered in Oslo might list its customer service number as +47 23 68 12 34. When dialing from abroad, a caller in the United States would dial 011 47 23 68 12 34. From the United Kingdom, it would be 00 47 23 68 12 34. This prefix is also used for government offices and corporate headquarters, ensuring a recognizable local identity for callers.