Area Code 1584 – Engaru, Hokkaido

Overview of Area Code 1584 (Engaru, Hokkaido)

Area code 1584 is a geographic National Destination Code (NDC) within the Japanese numbering plan, assigned to the Engaru area in the Okhotsk subprefecture of Hokkaido. This code covers the town of Engaru and its surrounding administrative districts, including the former villages of Ikutahara and Maruseppu, which were merged into Engaru in 2005. The region is known for its agricultural production, particularly dairy farming and potato cultivation, as well as its scenic landscapes along the Yūbetsu River.

Dialing Formats

When calling a landline in the Engaru area from within Japan, subscribers dial the 0 trunk prefix followed by the area code and the subscriber number. The full national format is 0-1584-X-XXXX, where the subscriber number typically consists of 5 to 6 digits. For example, a local number might be 0-1584-5-1234. From overseas, callers must use the international access code (e.g., 011 from the US, 00 from most European countries), followed by Japan's country code +81, and then the area code without the leading zero. Thus, the international format becomes +81-1584-X-XXXX. For instance, if the local number is 0-1584-5-6789, the international dialing format would be +81-1584-5-6789.

Geographic Coverage and Administration

The 1584 area code is administered by NTT East (Nippon Telegraph and Telephone East Corporation), which provides fixed-line services in the Hokkaido region. The Engaru exchange area is part of the larger Kitami MA (Municipal Area) and is served by the Okhotsk general bureau. While Engaru is a relatively small town, the area code also covers the nearby communities of Ikutahara and Maruseppu, ensuring that all landlines within these boundaries share the same dialing prefix.

Overlay and Numbering Considerations

Currently, there is no overlay code for the 1584 area, meaning that local calls within the Engaru area do not require an area code if dialed from the same exchange. However, calls from other parts of Japan must include the trunk prefix 0 and the area code. For callers from mobile phones, it is essential to include the area code even when dialing a landline in the same region, as mobile networks do not automatically route based on location.

Practical Tips for Callers

For international callers, it is important to note that Japanese area codes are not separated by a space when dialing; the entire number is a continuous sequence. Also, when storing numbers in a phone book, it is customary to write the area code in parentheses, e.g., (01584) 5-1234. However, for international dialing, the parentheses are omitted. Always verify the subscriber number length, as it may vary, and be aware that some numbers may have been migrated to VoIP services, which can affect routing but not the dialing format.