Area Code 1553 – Obihiro, Hokkaido

Geographic Coverage and Administrative Jurisdiction

The area code 1553 is a geographic National Destination Code (NDC) within the Japanese numbering plan, assigned to the city of Obihiro and its surrounding areas in the Tokachi Subprefecture of Hokkaido. This code covers the central urban districts of Obihiro, including the main commercial and administrative zones, as well as adjacent municipalities such as Otofuke, Makubetsu, and portions of Ikeda and Honbetsu. The service area is administered under the jurisdiction of the Tokachi General Subprefecture Bureau, and the code is allocated for fixed-line PSTN services, though some VoIP providers may also offer numbers with this prefix.

Dialing Formats and Caller Instructions

For local callers within the Obihiro area, the number is dialed as an 8-digit local number, typically beginning with the subscriber number after the area code. However, for calls originating from outside the 1553 area but still within Japan, the full national format must be used: 01553-XXXXXX (where XXXXXX is the 6-digit subscriber number). For international callers, the format is +81 1553 XXXXXX (or +81-1553-XXXXXX).

When dialing from abroad, you must replace the leading zero of the area code with Japan's country code +81. For example, to call a number in Obihiro with the local number 45-6789, you would dial +81 1553 45-6789 from outside Japan. From within Japan but outside the 1553 area, dial 01553-45-6789. Note that the area code is not optional for calls from mobile phones or other regions; the full national number must be used.

Overlay and Numbering Considerations

Currently, there is no overlay code for the 1553 area; the code is exclusive to the Obihiro region. However, as with many Japanese geographic codes, the number of available subscriber lines is finite, and new allocations are managed by the Ministry of Internal Affairs and Communications (MIC). In recent years, some businesses have adopted VoIP services with numbers that may appear as 1553 but are not tied to a physical location; these numbers can be dialed identically but may route over IP networks. For emergency services, callers in the 1553 area should dial 110 (police) or 119 (fire/ambulance), which are universal across Japan and do not require an area code.

Practical Guidance for Callers

If you are a foreign caller, ensure you have the correct 6-digit subscriber number, as omitting the area code will result in a failed call. For travelers within Japan, using a mobile phone to call a 1553 number requires the full 01553 prefix, even if you are physically in the area, unless your mobile plan supports local dialing without the prefix (which is rare). For businesses, it is advisable to display numbers in international format (+81 1553 ...) on websites and marketing materials to facilitate calls from overseas clients.