Area Code 2675 – Saku, Nagano

Overview of Area Code 2675

Area code 2675 is a geographic National Destination Code (NDC) within the Japanese numbering plan, assigned to the city of Saku (佐久市) and its surrounding areas in Nagano Prefecture. This code is part of the larger Saku region, which includes the cities of Saku, Komoro, and the towns of Tateshina and Nagawa. The area is located in the eastern part of Nagano Prefecture, at the foot of the Yatsugatake mountains, and is known for its agricultural production and scenic beauty.

Dialing Formats

When calling a landline number in Saku from within Japan, you must dial the area code followed by the subscriber number. The area code 2675 is typically used with a 5-digit subscriber number, resulting in a total of 9 digits after the national trunk prefix. For example, a local number might be 2675-12-3456. From overseas, callers must use the international prefix, followed by Japan's country code (+81), then the area code without the leading zero, and the subscriber number. Thus, the same number would be dialed as +81 2675 12 3456.

It is important to note that Japan uses a closed numbering plan for landlines, meaning that the area code and subscriber number are always dialed together, even for local calls. This ensures that calls are routed correctly across the PSTN.

Geographic Coverage and Administration

The 2675 area code is administered by NTT East (Nippon Telegraph and Telephone East) and serves the Saku region, which is part of the Nagano Prefecture. The primary city, Saku, is the administrative center and has a population of approximately 100,000. The area code covers a mix of urban and rural areas, including the Saku Plain, which is a major agricultural area producing rice, vegetables, and fruits. The region is also home to several historical sites and is a popular destination for outdoor activities.

Calling Instructions

For local callers within the Saku area, simply dial the 5-digit subscriber number after the area code. For long-distance callers within Japan, dial the trunk prefix '0', then the area code 2675, followed by the subscriber number. For example, a call from Tokyo to Saku would be dialed as 0-2675-12-3456. International callers should use their 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 without the leading zero (2675), and the subscriber number. For instance, from the US, you would dial 011 81 2675 12 3456.

Overlay and Numbering Considerations

Currently, there is no overlay code for the Saku area; 2675 is the sole area code for this region. However, as with all Japanese geographic codes, the number of available subscriber numbers is finite. If the demand for new numbers increases, an overlay code could be introduced in the future, but as of now, no such plans have been announced. It is also worth noting that number portability allows users to retain their landline numbers when switching service providers, but the geographic area code remains tied to the physical location of the line.