Area Code 1367 – Suttsu, Hokkaido

Overview of Area Code 1367

Area code 1367 is a geographic numbering plan area within the Japanese telephone numbering system, specifically assigned to the Suttsu region in Hokkaido. This code is part of the national destination code (NDC) structure defined under ITU-T E.164, used for routing calls to fixed-line subscribers in this area. The region encompasses the town of Suttsu and its surrounding administrative districts, including parts of the Shiribeshi Subprefecture. As a geographic code, 1367 is tied to a physical location, and calls to this area are charged based on the distance from the caller's location.

Coverage and Administrative Jurisdiction

The 1367 area code serves the town of Suttsu, which is located on the western coast of Hokkaido, facing the Sea of Japan. The town is known for its fishing industry and scenic coastal landscapes. The code also covers neighboring communities within the Suttsu District, such as Kuromatsunai and Rankoshi, though some of these may share or overlap with other area codes. The administrative jurisdiction falls under the Shiribeshi General Subprefecture, which manages local services and infrastructure. For callers, this means that dialing 1367 connects to fixed-line services within this defined geographic area.

Dialing Formats

When calling a number in the Suttsu area from within Japan, the standard local dialing format is to dial the area code (including the leading zero) followed by the subscriber number. For example, to call a local number 123456, you would dial 01367-123456. From outside Japan, the international format requires the country code for Japan (+81), followed by the area code without the leading zero, and then the subscriber number. Thus, the same number would be dialed as +81 1367 123456. It is important to note that the area code is an integral part of the full national significant number (NSN), which in Japan is typically 10 digits in length, including the area code.

Overlay Considerations and Caller Instructions

Currently, there are no overlay codes for the 1367 area, meaning that the area code is unique to this region and no additional area codes share the same geographic area. For local callers within the same area code, it is possible to dial the subscriber number without the area code in some cases, but it is always safe to include the full area code to avoid misdialing. For callers from other parts of Japan, dial the area code with the leading zero. For international callers, use the +81 prefix and omit the leading zero. Ensure that you have the correct number of digits after the area code, as Japanese fixed-line numbers typically have 6 to 8 digits after the area code, depending on the specific exchange.

Technical Considerations

Like all geographic codes in Japan, the 1367 area code is allocated to Nippon Telegraph and Telephone (NTT) East, which provides local exchange services. The network supports traditional PSTN services, as well as ISDN and VoIP services that are tied to physical lines. When calling from a VoIP service, it is essential to include the area code to ensure proper routing. Mobile phone numbers in Japan are non-geographic and begin with 090, 080, or 070, so they are not affected by this area code. Number portability exists for fixed-line services, allowing subscribers to retain their numbers when changing providers within the same geographic area, but the area code remains associated with the physical location.