Area Code 346 – Maarssen

Overview of Area Code +31 346

Area code +31 346 is a geographic National Destination Code (NDC) assigned to the region of Maarssen and its surrounding municipalities in the central Netherlands. This code falls within the Utrecht province and serves a mix of residential, commercial, and administrative numbers. The numbering area is part of the Dutch PSTN (Public Switched Telephone Network) and is administered by the Authority for Consumers and Markets (ACM) under the national numbering plan, which adheres to ITU-T E.164 recommendations.

Geographic Coverage and Administrative Jurisdiction

The +31 346 area code primarily covers the town of Maarssen, which is part of the municipality of Stichtse Vecht. This municipality also includes other localities such as Breukelen, Kockengen, and Nieuwer Ter Aa. The region lies just northwest of the city of Utrecht, and its proximity to the capital has led to a growing number of businesses and commuters. The area code is also used in parts of the neighboring village of Oud-Zuilen, which is administratively part of Stichtse Vecht but historically linked to Maarssen.

Dialing Formats and Caller Instructions

When calling a landline within the Netherlands, the national trunk prefix 0 is used before the area code, followed by the subscriber number. For example, a local number in Maarssen might be dialed as 0346-123456 from within the country. Internationally, callers must replace the leading zero with the country code +31, resulting in the format +31 346 123456.

Local callers within the 346 area code can often dial the subscriber number without the area code, depending on the specific local exchange configuration. However, for clarity and to avoid misdialing, it is recommended to always include the full national number when dialing from a mobile phone or from a different region. Overlay considerations: currently, there is no overlay code for this area, so the 346 code remains the sole geographic code for the region.

Numbering and Routing Details

Subscriber numbers within the +31 346 area code typically consist of six to seven digits, resulting in a total national significant number (NSN) length of nine or ten digits (excluding the trunk prefix). The numbers are allocated to fixed-line operators, including KPN, Ziggo, and various alternative carriers. Since the liberalization of the Dutch telecom market, number portability allows subscribers to retain their 346 numbers even when switching providers, which can sometimes lead to numbers being served by VoIP or other non-traditional networks.

For international callers, it is essential to note that the plus sign (+) indicates the international access code, which varies by country (e.g., 00 in most European countries, 011 in the US). Thus, a caller from the United States would dial 011 31 346 123456 to reach a Maarssen landline.