Area Code 247 – Oslo
The phone area code for Oslo is 247 (international format +47247). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 247
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Oslo
Geographic Coverage and Administrative Jurisdiction
The Norwegian country code +47 is followed by the area code 247 for the capital city of Oslo. This code serves the central and eastern districts of Oslo Municipality, including the city centre, Grünerløkka, Gamle Oslo, and surrounding urban neighbourhoods. As a geographic prefix, 247 is tied to the PSTN network infrastructure of Oslo, managed under the jurisdiction of the Norwegian Communications Authority (Nkom). It is used for fixed-line services, including traditional copper lines, fibre-based VoIP, and ISDN, all of which are assigned to subscribers within the Oslo exchange area.
Dialing Formats and Caller Instructions
For local callers within Norway, the number is dialed in the national format: 247 XX XXX (eight digits in total, including the area code). When calling from abroad, the international format is +47 247 XX XXX. Note that the leading '0' is not used in Norwegian numbers; the country code +47 is followed directly by the area code. For example, a local Oslo number might be 247 12 345, which becomes +47 247 12 345 internationally.
Callers from other countries should replace the '+' with their international access code (e.g., 00 from most European countries, 011 from North America). Calls to this geographic prefix are charged according to the caller's national tariff for fixed-line calls to Norway.
Overlay and Numbering Plan Considerations
Oslo is served by several geographic area codes, including 21, 22, 23, 24, and 247. These codes are not overlays in the traditional sense; rather, they are distinct prefixes within the Oslo numbering area. This means that local calls between different Oslo prefixes may require the full national number, depending on the operator's dialing plan. However, within the same prefix, shorter local dialing may be possible if the network supports it. Subscribers can keep their numbers when switching operators (number portability), which is a regulatory right in Norway.
Technical and Regulatory Notes
The 247 prefix is allocated for geographic fixed-line services, but due to number portability, a number with this prefix may be routed to a VoIP or mobile service if the subscriber has moved. This is transparent to the caller. For emergency services, always dial 110 (fire), 113 (medical), or 112 (police) regardless of the prefix. For international callers, it is essential to use the correct country code +47 and to omit any leading '0' that might appear in local directories.