Area Code 184 – Sliedrecht

Geographic Overview

The +31 184 area code is a geographic National Destination Code (NDC) assigned to the region of Sliedrecht, a municipality in the province of South Holland, Netherlands. This code covers the town of Sliedrecht itself and, depending on the specific allocation, may also serve nearby localities within the same administrative area. Sliedrecht is situated along the Merwede River and is known for its historical connection to the dredging and maritime industries. The area code is used for fixed-line services (PSTN) and is administered under the Dutch numbering plan, which follows ITU-T E.164 recommendations.

Dialing Formats

When dialing a number within the Sliedrecht area, the local format is 0184-XXXXXX (where X represents the subscriber number). For international callers, the country code for the Netherlands is +31, so the full international format becomes +31 184 XXXXXX. It is important to note that the leading '0' of the NDC is dropped when dialing from abroad. For example, a local number such as 0184-123456 would be dialed as +31 184 123456 from outside the Netherlands.

Caller Instructions

• Local callers (within the Netherlands): Dial the full national number including the trunk prefix '0', e.g., 0184-123456.
• International callers: Dial the international access code (e.g., 00 from most countries, or +), followed by 31, then the area code without the leading zero, and the subscriber number: +31 184 123456.
• Within the same area code: In most cases, you can dial the 6-digit subscriber number directly, but for clarity and to avoid issues with number portability, it is recommended to always dial the full national number.

Overlay and Numbering Considerations

As of the current numbering plan, there is no overlay code for the 184 area. The code is exclusively assigned to the Sliedrecht region. However, due to number portability, a fixed-line number with the 184 prefix may be routed to a different geographic location or even to a VoIP service. Therefore, the area code does not guarantee the physical location of the line, but it remains associated with the original geographic allocation for administrative and routing purposes.

Regulatory and Technical Notes

The Dutch regulatory authority, the Authority for Consumers and Markets (ACM), oversees the allocation of numbering resources. The 184 code is part of the geographic numbering ranges used for fixed telephony services. For businesses and residents in Sliedrecht, this code is essential for local communication and is widely recognized in the region. When integrating such numbers into communication systems, it is crucial to store numbers in E.164 format (+31184XXXXXX) to ensure proper international routing and compatibility with VoIP and mobile networks.