Area Code 2384 – Oslo
The phone area code for Oslo is 2384 (international format +472384). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 2384
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Oslo
Geographic Coverage and Administrative Jurisdiction
The +47 2384 prefix is a geographic National Destination Code (NDC) assigned to the Oslo metropolitan area, Norway's capital and largest city. As part of the Oslo numbering zone, this code serves subscribers within the city's administrative boundaries, including central districts such as Sentrum, Grünerløkka, and Majorstuen, as well as adjacent suburban areas that fall under the Oslo municipality. The code is managed by the Norwegian Communications Authority (Nkom) and allocated to fixed-line operators providing PSTN and VoIP services in the region.
Dialing Formats and Caller Instructions
For local callers within Norway, the number is dialed in its national format as 23 84 XX XX (8 digits after the trunk prefix). When calling from abroad, the international format must be used: +47 23 84 XX XX. The leading '0' is not used in Norwegian numbering, so the country code +47 is followed directly by the NDC and subscriber number. For example, a typical Oslo number might be +47 23 84 12 34.
Overlay and Numbering Plan Considerations
Oslo does not have an overlay code; the entire city uses the 2-digit NDC '23' followed by a 6-digit subscriber number. However, the 2384 prefix is part of a larger block of numbers allocated to fixed-line services, and number portability allows subscribers to retain their number when switching operators, even if they move outside the geographic area. This means that a number with the 2384 prefix may not necessarily be physically located in Oslo, though it was originally assigned there.
Service and Usage Notes
Numbers under 2384 are primarily used for residential and business fixed lines, including ISDN and VoIP services. Calls to these numbers are typically charged at standard national rates, depending on the caller's operator and subscription plan. For international callers, charges vary based on their home country's roaming and international calling rates. It is important to note that while VoIP services may allow location-independent use, the number remains tied to the Oslo numbering plan for regulatory and routing purposes.
Practical Tips for Callers
When dialing from a mobile phone in Norway, the same national format applies. If you are unsure whether a number is still active, you can use online number validation tools. For businesses, having an Oslo number like +47 2384 can enhance local presence and customer trust. Always verify the full number before dialing, as misdialing can lead to unintended destinations.