Area Code 347 – Vianen
The phone area code for Vianen is 347 (international format +31347). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 347
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Vianen
Geographic Coverage and Administrative Jurisdiction
The +31 347 area code is a geographic National Destination Code (NDC) assigned to the region of Vianen, a city and former municipality in the province of Utrecht, Netherlands. Vianen is situated along the Lek River, directly south of Utrecht, and forms part of the Utrechtse Heuvelrug region. The code covers the town of Vianen itself and the surrounding localities, including Hagestein, Everdingen, and Zijderveld. These areas are within the administrative jurisdiction of the municipality of Vijfheerenlanden, which was established in 2019 through a merger of Vianen, Leerdam, and Zederik. The +31 347 area code is part of the Dutch numbering plan administered by the Authority for Consumers and Markets (ACM) under the ITU-T E.164 recommendation.
Dialing Formats and Caller Instructions
For local callers within the Netherlands, the area code is dialed with a leading zero: 0347. The subscriber number consists of six digits, resulting in a total national significant number length of nine digits (0-347-xxxxxx). An example of a local number is 0347-123456.
For international callers, the leading zero is omitted, and the country code +31 is used. The international format is +31 347 123456. When calling from abroad, you must replace the '+' with your country's international access prefix (e.g., 00 from most European countries, 011 from the US/Canada).
When dialing within the same area code, it is possible to omit the area code and dial only the six-digit subscriber number, provided that the call is made from a fixed line within the 0347 area. However, for clarity and to avoid errors, it is recommended to always use the full national format.
Overlay and Numbering Considerations
As of the latest ACM data, the 0347 area code does not have an overlay code. This means that the area code is unique to the Vianen region, and no additional area codes have been assigned to the same geographic area. This simplifies dialing, as there is no need for ten-digit dialing within the region. However, the Netherlands is transitioning to all-IP networks, and number portability is fully implemented. This means that a subscriber may retain their 0347 number even if they move to a different geographic location, as long as the service provider supports portability. This can occasionally lead to a number being associated with a different physical location than the area code suggests.
Services and Usage
The 0347 area code is used for fixed-line telephony services, including PSTN and VoIP. It is also used for ISDN and xDSL services. Businesses in the region use these numbers for customer contact, and many local companies have adopted the area code as part of their identity. For callers, it is important to note that calls to 0347 numbers are charged according to the national fixed-line tariff, unless the call is made to a mobile number or a premium service. For international callers, charges vary depending on their carrier and the country of origin.