Area Code 72 – Alkmaar
The phone area code for Alkmaar is 72 (international format +3172). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 72
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Alkmaar
Geographic Coverage and Administrative Jurisdiction
The +31 72 area code is a geographic National Destination Code (NDC) assigned to the Alkmaar telephone exchange area in the Netherlands. This region falls under the administrative jurisdiction of the province of North Holland (Noord-Holland). The code serves the city of Alkmaar and its surrounding municipalities, including Heiloo, Castricum, Bergen, Langedijk, and parts of the broader Kennemerland region. Alkmaar is well-known for its historic cheese market and serves as a central hub for the northern part of the province. The area code covers both fixed-line PSTN and VoIP services, with numbers typically used by residents, businesses, and government institutions within this geographic footprint.
Dialing Formats and Caller Instructions
For callers within the Netherlands, the national trunk prefix '0' is used before the area code. Therefore, a local Alkmaar number is dialed as 072-XXXXXXX (where X represents the subscriber's seven-digit number). For international callers, the country code +31 is used, and the leading '0' is dropped, resulting in the format +31 72 XXXXXXX. For example, a local call to a business in Alkmaar might be dialed as 072-1234567 from within the Netherlands, while an international caller would dial +31 72 1234567. It is important to note that when dialing from a mobile phone within the Netherlands, the same national format applies, and the call is treated as a standard geographic call, potentially incurring charges depending on the caller's mobile plan.
Numbering Plan and Overlay Considerations
In the Dutch numbering plan, geographic area codes are assigned by the Authority for Consumers and Markets (ACM). The 072 area code is part of the E.164 numbering plan and is not subject to overlay codes; Alkmaar and its surrounding areas are exclusively served by this single NDC. Subscriber numbers within the 072 area code are seven digits long, allowing for a maximum of 10 million unique numbers, though not all are assigned. The area code has been in use since the introduction of the current Dutch numbering plan in 1995, when the former 0220 code for Alkmaar was changed to 072 as part of a nationwide restructuring. This change was implemented to accommodate the growing demand for telephone numbers and to standardize the length of all Dutch area codes to two or three digits.
Practical Usage and Routing
Geographic numbers in the 072 area code are used for both voice and fax services. Calls to these numbers are routed over the PSTN or via VoIP providers, depending on the subscriber's service. For businesses, having a local 072 number can enhance their presence in the Alkmaar region, as customers may perceive them as a local entity. When calling from abroad, international callers should be aware of time zone differences (Central European Time, UTC+1, with daylight saving time) and potential international calling charges. It is also worth noting that number portability allows subscribers to retain their 072 number when switching providers, but the number remains geographically tied to the Alkmaar area, meaning it cannot be ported to a different geographic region.