Area Code 86 – Oulu
The phone area code for Oulu is 86 (international format +35886). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 86
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Oulu
Overview of Finland's Area Code 86
Area code 86 is a geographic National Destination Code (NDC) assigned to the city of Oulu and its surrounding region in Finland. Under the ITU-T E.164 international numbering plan, the full international dialing format for numbers in this area is +358 86 XXX XXXX (where each X represents a digit of the subscriber number). Domestically, callers within Finland dial 086 XXX XXXX when calling from a different area code, and 86 XXX XXXX when calling from within the Oulu region itself.
Geographic Coverage and Administration
The 86 area code covers the North Ostrobothnia region, with Oulu as the principal city. Oulu is a major technology and education hub in Finland, known for its university and high-tech industries. The code also serves nearby municipalities and towns, including but not limited to Ylivieska, Raahe, and Kuusamo, depending on the specific exchange. The Finnish Transport and Communications Agency (Traficom) administers the national numbering plan, and the 86 code is allocated for fixed-line (PSTN) services, though some VoIP providers may also assign numbers with this prefix.
Dialing Instructions
- Local calls (within Oulu): Dial the 7-digit subscriber number directly, omitting the trunk prefix '0' and the area code. For example, to reach a local number, dial XXX XXXX.
- National calls (from other Finnish regions): Dial 0 followed by the area code and subscriber number: 086 XXX XXXX.
- International calls from abroad: Dial the international access prefix (e.g., 00 from most countries, or +), then 358 (Finland's country code), then 86 (without the leading 0), followed by the subscriber number: +358 86 XXX XXXX.
Numbering and Overlay Considerations
Finnish geographic numbers are typically 5 to 7 digits long after the area code. The 86 code does not currently have an overlay, meaning the area code is not shared with another code in the same region. However, number portability allows subscribers to retain their 86 numbers when switching to a different operator or technology, including mobile or VoIP, which may result in a number that is no longer geographically tied to Oulu. Callers should be aware that the geographic association of a number may not always reflect the actual location of the called party.
Practical Examples
To illustrate, a typical Oulu fixed-line number might be +358 86 123 4567. A caller from Helsinki would dial 086 123 4567, while a caller from the United States would dial 011 358 86 123 4567 (or use the + notation on mobile devices). For international callers, it is essential to drop the leading '0' of the area code when dialing from abroad.