Area Code 33 – Vestfold
The phone area code for Vestfold is 33 (international format +4733). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 33
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Vestfold
Overview of +47 33
The +47 33 prefix is a geographic area code within the Norwegian national numbering plan, serving the Vestfold region. It is assigned to the traditional county of Vestfold, located on the western shore of the Oslofjord. The area code covers the administrative center Tønsberg, as well as other key municipalities such as Sandefjord, Larvik, Horten, Holmestrand, and Færder. These localities are part of the larger Vestfold og Telemark county since the 2020 administrative reform, but the numbering area remains distinctly identified by the 33 prefix.
Geographic Coverage and Dialing Formats
Within Norway, calls to numbers beginning with 33 are dialed using the national format: 33 XX XX XX (8 digits total, including the area code). The prefix is a National Destination Code (NDC) under the ITU-T E.164 standard. When dialing from abroad, callers must use the international format: +47 33 XX XX XX or 0047 33 XX XX XX (the latter using the international prefix from most countries). The country code for Norway is +47, and the trunk prefix '0' is not used in Norwegian dialing; the area code is always included in the national number.
Local and International Caller Instructions
For local callers within the 33 area, it is still necessary to dial the full 8-digit number, including the area code, because Norway uses closed dialing plan. There are no separate local dialing formats; all national calls require the area code. For international callers, the process is straightforward: dial the international access code (e.g., 00 from most European countries, 011 from North America), followed by 47, then the 8-digit subscriber number beginning with 33. No additional prefixes are required.
Numbering and Overlay Considerations
As of the latest ITU-T national numbering plan, there are no overlay codes in this region; the 33 prefix is exclusively used for geographic numbers in Vestfold. Subscriber numbers within this area are 8 digits long, including the area code. The prefix is allocated to both fixed-line PSTN services and VoIP services that are registered to the geographic area. However, with number portability, a number beginning with 33 may be routed to a mobile or VoIP service, but the geographic association remains for administrative purposes.
Practical Examples
- Calling a Tønsberg business from abroad: +47 33 12 34 56
- Calling a Sandefjord resident from Oslo: 33 98 76 54
- International call from the UK: 00 47 33 55 44 33
Understanding the +47 33 prefix is essential for anyone needing to reach contacts in the Vestfold region, ensuring accurate dialing and efficient communication.