Area Code 1375 – Yakumo, Hokkaido

Overview of Area Code 1375

Area code 1375 is a geographic numbering plan area within the Japanese telephone numbering system, specifically assigned to the Yakumo region in southwestern Hokkaido. This area code corresponds to the National Destination Code (NDC) 01375 under the ITU-T E.164 international dialing standard. The region encompasses Yakumo Town and its surrounding administrative areas, including parts of the Futami and Otobe districts. The code is used for fixed-line (PSTN) services, including traditional analog lines, ISDN, and fiber-optic (FTTH) voice services.

Geographic Coverage and Administrative Jurisdiction

The 1375 area code serves the Yakumo subprefectural region, which falls under the Oshima Subprefecture of Hokkaido Prefecture. The primary city is Yakumo, a coastal town known for its fishing industry and scenic views of the Sea of Japan. The numbering area also covers smaller communities such as Kumaishi and the neighboring rural districts. The code is administered by the Ministry of Internal Affairs and Communications (MIC) and allocated to Nippon Telegraph and Telephone East (NTT East) for local exchange services.

Dialing Formats

For local callers within the Yakumo area, the area code is typically omitted when dialing a local number. The local number length is 6 digits, making the complete domestic dialing format 0-1375-XX-XXXX when calling from outside the area but within Japan. For example, to call a Yakumo landline from Tokyo, you would dial 01375-XX-XXXX. International callers must use the country code for Japan (+81) and drop the leading zero of the area code, resulting in the format +81-1375-XX-XXXX. For instance, a call from the United States to a Yakumo number would be dialed as 011 81 1375 XX XXXX.

Overlay and Numbering Considerations

As of the latest numbering plan updates, there are no overlay codes in the 1375 area. The region maintains a single area code, and 10-digit dialing (including the leading zero) is required for all calls made from outside the local calling area. Within the same area code, local calls can be made using only the 6-digit subscriber number. However, if you are calling from a mobile phone, you must always include the area code, as mobile networks do not recognize local abbreviated dialing.

Caller Instructions

For local callers: When dialing a number within Yakumo, simply dial the 6-digit subscriber number. For callers from other parts of Japan: Dial 01375 followed by the subscriber number. For international callers: Dial your country's exit code (e.g., 011 from the US, 00 from most European countries), then Japan's country code 81, then the area code 1375 (without the leading zero), and finally the 6-digit subscriber number. Ensure you have the correct number of digits; the total international number length should be 13 digits after the country code (including the area code and subscriber number).