Area Code 1554 – Obihiro, Hokkaido

Overview of Area Code 1554

Area code 1554 is a geographic National Destination Code (NDC) assigned to the city of Obihiro and its surrounding municipalities in the Tokachi subprefecture of Hokkaido, Japan. This code is part of the Japanese telephone numbering plan, which follows ITU-T E.164 recommendations. The full international dialing format for numbers in this region is +81 1554 X-XXXX, where the subscriber number typically consists of 5 to 6 digits, resulting in a total national significant number length of 10 digits (excluding the leading trunk prefix '0').

Geographic Coverage and Administrative Jurisdiction

The 1554 area code serves the city of Obihiro, the commercial and administrative center of the Tokachi region, as well as nearby towns such as Otofuke, Makubetsu, and Ikeda. The region is known for its agricultural production and hosts the Obihiro Airport (OBO), which connects the area to major Japanese cities. The numbering area is administered under the jurisdiction of the Japanese Ministry of Internal Affairs and Communications (MIC) and is serviced by NTT East (Nippon Telegraph and Telephone East Corporation) as the primary local exchange carrier, though alternative carriers may operate in the region.

Dialing Formats and Caller Instructions

For local callers within the 1554 area code, it is necessary to dial the full 10-digit national number, including the trunk prefix '0' and the area code, even for calls within the same city. For example, to call a local number in Obihiro, you would dial 01554 X-XXXX. This is because Japan uses a closed dialing plan for geographic numbers, and the area code is an integral part of the national number.

For international callers, the correct format is +81 1554 X-XXXX (or 011 81 1554 X-XXXX from North America). The leading '0' of the national prefix is omitted when dialing from abroad. For example, to call a business in Obihiro with a subscriber number 12345, an international caller would dial +81 1554 12345.

Overlay and Numbering Considerations

As of the latest data, no overlay area code has been introduced for the 1554 region; the area code remains unique to the Obihiro geographic area. However, with the increasing penetration of VoIP and mobile services, some numbers may be assigned to non-geographic services, but they retain the geographic appearance. Callers should be aware that calls to 1554 numbers are typically charged as domestic long-distance calls when dialed from outside the area, and rates vary by carrier. For emergency services, dial 110 (police) or 119 (fire/ambulance) regardless of the area code.