Area Code 1587 – Nakayubetsu, Hokkaido

Overview of Area Code 1587

Area code 1587 is a geographic National Destination Code (NDC) assigned to the town of Nakayubetsu in the Hokkaido prefecture of Japan. This code is part of the Japanese telephone numbering plan, which follows the ITU-T E.164 standard. When dialing from abroad, the full international format is +81 1587 XXXXX, where the leading zero of the domestic area code is omitted.

Geographic Coverage and Administrative Jurisdiction

Nakayubetsu is a town located in the Tokachi Subprefecture of Hokkaido. The area code 1587 serves the town center and its surrounding rural districts. It is important to note that in Japan, area codes are not strictly aligned with municipal boundaries; however, 1587 is specifically allocated to the Nakayubetsu exchange area. The town is known for its agricultural activities, particularly dairy farming and potato cultivation.

Dialing Formats and Instructions

For local callers within the same area code, the subscriber number is typically 5 digits long, and the full number is dialed as 01587 XXXXX. When calling from another area code within Japan, dial 0 followed by the area code and subscriber number: 01587 XXXXX. For international callers, the format is +81 1587 XXXXX (drop the leading zero).

For example, if a local number is 12345, a domestic call from Tokyo would be dialed as 01587 12345, while an international call from the United States would be dialed as 011 81 1587 12345 (or +81 1587 12345 from a mobile phone).

Numbering and Overlay Considerations

As of the latest data, there are no overlay codes or 10-digit dialing requirements in the Nakayubetsu area. The area code 1587 is a closed numbering plan segment, meaning that local calls do not require the area code. However, with the gradual migration toward IP-based telephony, some VoIP services may require the area code even for local calls, so users are advised to check with their service provider.

Caller Instructions

For callers within Japan: If you are in the Nakayubetsu area, simply dial the 5-digit subscriber number. If you are outside the area code but still in Japan, dial 01587 followed by the subscriber number. For callers from overseas, always use the international prefix of your country, then 81 (Japan's country code), then 1587 (without the leading zero), and then the subscriber number. Ensure you omit the initial '0' of the area code when dialing internationally.

This area code is managed by the Ministry of Internal Affairs and Communications (MIC) and is assigned to Nippon Telegraph and Telephone East (NTT East) for fixed-line services. Mobile and VoIP numbers are not typically assigned to this geographic code, as they use non-geographic prefixes starting with 070, 080, or 090.