Area Code 521 – Steenwijk
The phone area code for Steenwijk is 521 (international format +31521). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 521
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Steenwijk
Geographic Overview
The +31 521 country code and area code combination corresponds to the geographic numbering area of Steenwijk, a city and municipality located in the province of Overijssel in the northeastern Netherlands. This area code is part of the national destination code (NDC) framework under the ITU-T E.164 standard, specifically assigned to the traditional PSTN (Public Switched Telephone Network) and VoIP (Voice over Internet Protocol) services that are physically or administratively associated with the Steenwijk exchange area.
The Steenwijk numbering area encompasses the city itself and several surrounding towns and villages, including but not limited to Oldemarkt, Willemsoord, and Paasloo. The administrative jurisdiction falls under the municipality of Steenwijkerland, which was formed in 2001 through the merger of Steenwijk, Brederwiede, and IJsselham. This area is known for its historical fortifications and the nearby Weerribben-Wieden National Park, a significant wetland reserve.
Dialing Formats
For callers within the Netherlands, the national trunk prefix is 0, so local numbers are dialed as 0521-XXXXXXX (where X represents the subscriber number). The subscriber number length within this area code is typically seven digits, making the complete national significant number (NSN) nine digits when including the leading 0. For international callers, the format is +31 521 XXXXXXX or +31521XXXXXXX when dialed without spaces. The leading 0 is omitted in international dialing, as it is only used for domestic trunk calls.
It is important to note that the Netherlands implemented number portability, so a number with the 0521 prefix may have been ported to a different geographic location or even to a mobile or VoIP provider. However, the prefix remains associated with the original geographic area for routing purposes. There are no overlay codes in this region; the 0521 code is exclusively used for the Steenwijk area.
Caller Instructions
For local callers within the Steenwijk area, dialing the full 10-digit number (including the 0) is required, as the Netherlands uses closed dialing plan. For international callers, always replace the leading 0 with the +31 country code. For example, a local number 0521 1234567 would be dialed internationally as +31 521 1234567. Ensure that you use the correct exit code from your country when dialing internationally.