Area Code 4 – Mobile Network
The phone area code for Mobile Network is 4 (international format +474). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 4
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Overview of Norwegian Mobile Prefix 4
In the Norwegian numbering plan, as administered by the Norwegian Communications Authority (Nkom) under the ITU-T E.164 standard, the country calling code +47 is shared by all telephony services. Within this national plan, numbers beginning with the digit 4 are designated as non-geographic mobile numbers. Unlike geographic area codes that correspond to specific regions such as Oslo (2) or Bergen (5), the prefix 4 is allocated to mobile network operators (MNOs) and mobile virtual network operators (MVNOs). This means that a number starting with 4 does not indicate the caller's or subscriber's physical location; it is solely associated with mobile services.
Number Structure and Formatting
Norwegian mobile numbers are eight digits long, including the leading 4. The general format is 4X XX XX XX, where the second digit often hints at the original operator (e.g., 40, 41, 42 for legacy Telenor; 45, 46, 47 for legacy Telia). However, due to mobile number portability (MNP), the prefix no longer guarantees the current operator. When dialing from abroad, the international format is +47 4X XX XX XX (or 0047 4X XX XX XX). For example, a typical mobile number might be +47 412 34 567.
Dialing Instructions
- Domestic calls: Within Norway, dial the eight-digit number directly, e.g., 412 34 567. No trunk prefix (like 0) is used.
- International calls to Norway: Dial your country's exit code (e.g., 00 from most of Europe, 011 from North America), then 47, followed by the eight-digit mobile number, omitting any leading zero (there is none). Example: 00 47 412 34 567.
- SMS and MMS: Use the same international format for sending text messages from abroad.
Regulatory and Technical Considerations
Mobile numbers in Norway are portable. Subscribers can switch operators while retaining their number, which is a right guaranteed by Nkom. This means that the prefix 4 does not identify the operator. For emergency services, calls to 112, 110, and 113 are free from any mobile phone. Additionally, premium-rate services and certain shortcodes are not part of the 4 prefix. The numbering resource is managed to ensure sufficient capacity for MNOs and MVNOs, and numbers are allocated in blocks to operators upon request.
For businesses and individuals, understanding that 4-prefixed numbers are mobile is crucial for cost management. Calls to these numbers from fixed lines may incur higher tariffs than calls to geographic numbers, and international callers should check with their service provider for applicable rates. VoIP services and apps can also reach these numbers, but termination charges may apply.