Area Code 50 – Groningen
The phone area code for Groningen is 50 (international format +3150). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 50
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Groningen
Geographic Coverage and Administrative Jurisdiction
The +31 50 country calling code prefix is the geographic National Destination Code (NDC) assigned to the province of Groningen in the northeastern Netherlands. This area encompasses the city of Groningen, the largest urban center in the northern part of the country, as well as surrounding municipalities such as Haren, Ten Boer, and parts of the wider Groningen metropolitan region. The code is administered under the Netherlands' national numbering plan, which follows ITU-T E.164 recommendations.
Dialing Formats and Caller Instructions
For international callers, the number must be dialed as +31 50 followed by the local subscriber number, which is typically seven digits long. For example, a landline in Groningen might be reached at +31 50 1234567. When dialing from within the Netherlands, callers must use the trunk prefix 0 before the NDC, resulting in 050 1234567. It is important to note that the leading 0 is only used for domestic calls and is omitted when dialing from abroad.
Local calls within the Groningen area can be made using the full national format (including the 0) or, in some cases, the local number alone if the call originates from within the same geographic area. However, due to the implementation of number portability and the convergence of fixed and mobile services, the distinction between local and national calls has become less relevant for billing purposes.
Overlay Considerations and Numbering Plan
Currently, the Groningen region does not have an overlay code, meaning that the 050 prefix is the sole geographic code for the area. The subscriber number length is seven digits, and the total number length for a complete international number is 11 digits (including the country code but excluding the international access prefix). The Netherlands' regulator, the Authority for Consumers and Markets (ACM), oversees the allocation of these numbers and ensures that the numbering plan remains efficient and future-proof.
Practical Usage and Services
The 050 prefix is used for fixed-line services, including PSTN and VoIP connections. Businesses and residents in Groningen rely on this code for their primary voice communications. When calling from a mobile phone within the Netherlands, the same national format (050) is used. For callers from other countries, the international format (+31 50) is essential. It is also worth noting that some services, such as fax and alarm systems, may use this prefix, and callers should always verify the complete number to avoid misdialing.