Area Code 2363 – Oslo
The phone area code for Oslo is 2363 (international format +472363). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 2363
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Oslo
Overview of Area Code 2363
Area code 2363 is a geographic prefix within the Norwegian public switched telephone network (PSTN), allocated to the capital region of Oslo. As part of the national numbering plan administered by the Norwegian Communications Authority (Nkom), this code falls under the broader Oslo numbering area, which historically used the two-digit code 2 before the introduction of more granular prefixes. The 2363 prefix serves a specific central office (exchange) area within the city, enabling local loop connections for fixed-line subscribers.
Coverage and Administrative Jurisdiction
The 2363 area code covers a defined zone in Oslo, the administrative capital of Norway. Oslo is both a county and a municipality, and the code is used for landline services within this jurisdiction. While the prefix is not tied to a single district, it is commonly associated with the central and eastern parts of the city, including neighborhoods such as Grünerløkka, Gamle Oslo, and parts of the city center. For precise coverage, telecom operators and directory services can provide exchange-level details.
Dialing Formats and Caller Instructions
For local callers within Norway, dialing a number with the 2363 prefix requires the full national number: 23 63 XX XX (8 digits after the trunk prefix). The national trunk prefix is 0, but when dialing from a Norwegian fixed or mobile line, you typically dial 23 63 XX XX directly, as the trunk prefix is not used for geographic numbers in Norway. For international callers, the country code for Norway is +47, so the full international format is +47 23 63 XX XX. Note that the leading '0' is not used when dialing from abroad.
Overlay and Numbering Considerations
Oslo does not have overlay codes; instead, the city uses a range of prefixes under the 2 code, and 2363 is one of them. This means that subscribers in the 2363 area have numbers that are unique within the national numbering plan, and there is no need for area code changes. However, with the growth of VoIP and mobile services, geographic numbers like those in 2363 can be ported to non-geographic networks, allowing users to retain their numbers when moving to VoIP providers. This portability does not change the dialing format.
Practical Usage and Examples
Businesses and residents in the 2363 area use these numbers for fixed-line services, including voice and fax. A typical example of a local number is 23 63 45 67. When calling from a foreign country, you would dial +47 23 63 45 67. For callers within Norway, simply dial 23 63 45 67. It is important to note that calls to geographic numbers in Norway are typically charged at standard national rates, which may vary depending on the caller's operator and subscription plan.