Area Code 1392 – Kikonai, Hokkaido

Overview of Area Code 1392

Area code 1392 is a geographic telephone code assigned to the town of Kikonai, located in the Oshima Subprefecture of Hokkaido, Japan. This code is part of the Japanese numbering plan administered by the Ministry of Internal Affairs and Communications (MIC) and follows the ITU-T E.164 standard. The region served by 1392 includes Kikonai town and its surrounding areas, which are situated at the southern tip of Hokkaido, near the Tsugaru Strait.

Geographic Coverage and Administration

Kikonai is a small town with a population of approximately 5,000 residents. The area code 1392 is one of several codes used in the Oshima region; neighboring codes include 1387 for Matsumae and 1388 for Fukushima. The administrative jurisdiction for this numbering area falls under the Hokkaido Prefectural Government, with local telecommunications services provided by NTT East.

Dialing Formats

When calling a landline number in the Kikonai area, the standard national dialing format is:

• National (within Japan): 0-1392-XX-XXXX
• International (from outside Japan): +81-1392-XX-XXXX

For example, a local number such as 45-6789 would be dialed as 01392-45-6789 within Japan, and as +81 1392 45 6789 from abroad. Note that the leading '0' is used for domestic calls and is dropped when dialing internationally, replaced by the country code +81.

Caller Instructions

Local callers within the same area code can dial the 5-digit subscriber number directly without the area code (e.g., 45-6789). However, for clarity and to avoid misdialing, it is common to include the area code even for local calls. Callers from other regions in Japan must dial the full number including the area code, starting with 0 (e.g., 01392-45-6789). International callers should dial the international access prefix (e.g., 011 from the US, 00 from most European countries) followed by Japan's country code 81, then the area code without the leading zero (1392), and the subscriber number.

Overlay and Numbering Considerations

As of the latest data, there is no overlay plan for area code 1392, meaning it serves a distinct geographic area without shared numbering. The number length for local calls is 5 digits for the subscriber number, making the total national significant number (NSN) 10 digits when including the area code (excluding the trunk prefix 0). This is consistent with Japan's standard landline numbering.

For businesses or residents in Kikonai, the area code is an integral part of their identity, and it is essential to use the correct format when receiving calls from abroad to ensure proper routing through the PSTN.