Area Code 22 – Oslo
The phone area code for Oslo is 22 (international format +4722). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 22
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 calling code +47 is followed by the geographic area code 22, which is exclusively assigned to the capital city, Oslo. This code covers the entire municipality of Oslo, including the city centre (Sentrum), the boroughs of Frogner, St. Hanshaugen, Grünerløkka, Gamle Oslo, and the surrounding urban districts. As a geographic prefix, 22 is tied to the PSTN (Public Switched Telephone Network) infrastructure of the Oslo region, and it is administered by the Norwegian Communications Authority (Nkom) under the national numbering plan.
Dialing Formats and Caller Instructions
For callers within Norway, the local dialing format requires the trunk prefix '0' before the area code. To reach a number in Oslo from another Norwegian city, you would dial: 0 22 XX XX XX. However, when calling from abroad, the trunk prefix is omitted, and you dial the international access code (e.g., 00 from most European countries, or + from mobile phones), followed by the country code and the area code without the leading zero: +47 22 XX XX XX. For example, a typical Oslo landline number might be formatted as +47 22 85 60 00.
Numbering Structure and Overlay Considerations
Norwegian geographic numbers consist of the country code (+47), the area code (2 digits for Oslo), and an eight-digit subscriber number. The total length of a complete international number is 11 digits, including the leading +47. Unlike some countries, Norway has not implemented area code overlays for Oslo; the 22 prefix remains exclusively for geographic fixed-line services. However, due to number portability, a subscriber may retain their 22 number even if they move outside the Oslo region, but this does not affect the geographic significance of the prefix.
Usage and Modern Relevance
While mobile telephony dominates in Norway, the 22 code is still widely used by businesses, government institutions, and residential landlines in the capital. Many corporate headquarters, embassies, and public offices in Oslo use numbers starting with 22. For international callers, it is essential to note that Norwegian numbers do not have a separate trunk prefix when dialing from abroad; the +47 is always followed directly by the area code and subscriber number. Additionally, VoIP services may use geographic numbers like 22, but the routing is location-independent, which can affect emergency services location identification.
Practical Tips for Callers
When calling an Oslo number from outside Norway, always replace the leading '0' of the area code with the international exit code and +47. For example, to call the Norwegian Parliament (Stortinget) at 22 31 95 00, you would dial +47 22 31 95 00 from abroad. Within Norway, dial 022 31 95 00. It is also advisable to check for any additional digits that may be required for extensions when calling corporate switchboards.