Area Code 2560 – Itoigawa, Niigata

Overview of Area Code 2560

Area code 2560 is a geographic National Destination Code (NDC) assigned to the city of Itoigawa, located in the southwestern part of Niigata Prefecture, Japan. This code is part of the Japanese telephone numbering plan, which follows the ITU-T E.164 standard. The full international dialing format for numbers in this region is +81 2560 XXX XXX, where +81 is the country calling code for Japan, 2560 is the NDC, and the subscriber number is typically 6 digits long, making the total national significant number (NSN) length 10 digits.

Geographic Coverage

The 2560 area code serves Itoigawa City and its surrounding areas, including the former municipalities of Nō and Kyōdo, which were merged into Itoigawa in 2005. Itoigawa is known for its geotourism, the Itoigawa Geopark, and its location along the Japan Sea coast, bordering Nagano Prefecture. The region is characterized by mountainous terrain and is part of the Chubu region.

Dialing Formats

• Local calls (within the same area code): Dial the 6-digit subscriber number directly. For example, if the subscriber number is 123456, dial 123456.
• National calls (from other areas in Japan): Dial 0 followed by the area code and subscriber number. For instance, to call a number in Itoigawa from Tokyo, dial 0256 0123456 (note: the leading 0 is part of the national trunk prefix).
• International calls (from outside Japan): Dial the international access prefix (e.g., 011 in the US, 00 in most countries), then Japan's country code 81, then the area code without the leading 0, and the subscriber number. For example, from the US, dial 011 81 2560 123456.

Overlay and Numbering Considerations

Currently, there is no overlay code for the 2560 area. The area code 2560 is one of several NDCs in Niigata Prefecture, each serving distinct geographic areas. The Japanese Numbering Plan is administered by the Ministry of Internal Affairs and Communications (MIC), and number portability is available for geographic numbers, allowing subscribers to retain their numbers when changing service providers within the same geographic area.

Caller Instructions

For callers within Japan, always include the trunk prefix 0 when dialing from a different area code. For international callers, omit the leading 0 and use the country code. Ensure you have the correct 6-digit subscriber number, as Japanese geographic numbers are fixed at 10 digits in total (including the area code).