Area Code 2149 – Oslo
The phone area code for Oslo is 2149 (international format +472149). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 2149
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Oslo
Geographic Coverage and Administrative Jurisdiction
The +47 2149 prefix is a geographic National Destination Code (NDC) assigned to the central business district of Oslo, Norway's capital and largest city. This numbering block falls under the administrative jurisdiction of the Norwegian Communications Authority (Nkom), which oversees the national E.164 numbering plan. The 21xx range is specifically allocated to fixed-line services within the Oslo metropolitan area, serving both legacy PSTN and modern VoIP-based fixed connections. Subscribers within this range are typically located in the city center, including areas around the government quarter, financial institutions, and major commercial hubs.
Dialing Formats and Caller Instructions
For local callers within Norway, the prefix is dialed as 21 49 XX XX (8 digits total after the trunk prefix). When calling from abroad, the full international format is +47 21 49 XX XX or 0047 21 49 XX XX from most countries. It is important to note that Norway does not use trunk prefix '0' for domestic calls; instead, the NDC is dialed directly. For example, a typical number might be +47 21 49 12 34. Foreign callers should always replace the '+' with their country's international access code (e.g., '011' from North America).
Overlay and Numbering Plan Considerations
Oslo operates under a closed numbering plan with no overlay codes; the entire city shares the +47 country code and uses 8-digit subscriber numbers. The 21xx range is non-geographic in the sense that it is not tied to a specific telephone exchange, but it is geographically allocated to Oslo for regulatory and routing purposes. This means that while the number is associated with Oslo, it can be used by businesses that have a presence in the city, even if their physical switch is located elsewhere. Number portability allows subscribers to retain their 2149 numbers when changing service providers, but the geographic association remains with Oslo.
Practical Usage and Business Relevance
The 2149 prefix is commonly used by enterprises, government agencies, and professional services that require a prestigious Oslo central number. It supports standard fixed-line services, including ISDN and IP-based telephony, and is fully integrated with Norway's digital infrastructure. For businesses, having a 2149 number enhances local credibility and ensures clear identification as an Oslo-based entity. Callers from mobile networks within Norway dial the same 8-digit number without any additional prefix, ensuring seamless connectivity.