Area Code 43 – Maastricht
The phone area code for Maastricht is 43 (international format +3143). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 43
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Maastricht
Geographic Overview
The +31 43 area code is a geographic National Destination Code (NDC) assigned to the city of Maastricht, the capital of the province of Limburg in the southeastern Netherlands. This code serves the municipality of Maastricht and its immediate surrounding areas, including parts of the neighboring municipalities of Meerssen, Valkenburg aan de Geul, and Eijsden-Margraten. Maastricht is one of the oldest cities in the Netherlands and a key economic and cultural hub, hosting the Maastricht University and the headquarters of the European Centre for Parliamentary Research and Documentation.
Dialing Formats
When calling a Maastricht landline from within the Netherlands, subscribers must dial the full national number, which includes the trunk prefix 0, the area code 43, and the seven-digit subscriber number. For example, a local Maastricht number might be formatted as 043 123 4567 for domestic calls. From abroad, callers must replace the leading zero with the international access code and the Dutch country code +31, resulting in +31 43 123 4567. The total length of a complete international number is 12 digits, including the country code but excluding the international prefix.
Caller Instructions
Local callers within the Maastricht area can often dial just the seven-digit subscriber number for calls within the same rate area, but for clarity and to accommodate mobile and VoIP users, it is recommended to always dial the full national format. Foreign callers should use the international format, ensuring they drop the leading zero of the area code. For example, a call from the United States would be made by dialing 011 31 43 123 4567.
Overlay and Numbering Considerations
As of 2025, there is no overlay code for the 43 area; it remains the sole geographic code for Maastricht. However, number portability allows subscribers to retain their 043 numbers when moving to other operators, including VoIP providers, which may result in calls terminating outside the traditional geographic area. This is a common practice across the Netherlands, regulated by the Authority for Consumers and Markets (ACM).
For businesses, having a 043 number reinforces a local presence in the Maastricht region, which can be beneficial for customer trust and local SEO. When dialing from abroad, always verify the correct international prefix for your country, as it varies (e.g., 00 from most European countries, 011 from North America).