Area Code 2575 – Tokamachi, Niigata

Overview of Area Code 2575

Area code 2575 is a geographic National Destination Code (NDC) within the Japanese numbering plan, assigned to the city of Tokamachi and its surrounding areas in Niigata Prefecture. This code is part of the larger Niigata numbering area, which is subdivided into several smaller geographic codes to serve different municipalities. Specifically, 2575 covers the former city of Tokamachi and the adjacent towns of Matsunoyama, Matsudai, and Kawanishi, which were merged into the expanded city of Tokamachi in 2005. The region is located in the southern part of Niigata Prefecture, known for its heavy snowfall, hot springs, and rice production.

Geographic Coverage and Administrative Jurisdiction

The 2575 area code is administered by the Japanese Ministry of Internal Affairs and Communications (MIC) and is assigned to Nippon Telegraph and Telephone East (NTT East). It serves the city of Tokamachi and its administrative subdivisions, including the former towns of Matsunoyama, Matsudai, and Kawanishi. These areas are situated in the mountainous interior of Niigata, bordering Gunma and Fukushima prefectures. The principal city, Tokamachi, is the largest municipality in the region and serves as the commercial and administrative hub.

Dialing Formats and Instructions

For callers within Japan, the local dialing format is 025-75-XXXX (where XXXX is the subscriber number). When dialing from outside Japan, the international format is +81 25 75 XXXX (or +81 2575 XXXX when the area code is treated as a single block). It is important to note that the leading '0' is dropped when dialing from abroad, and the '+' sign represents the international access code (e.g., 011 from the US, 00 from most European countries).

For example, to call a number in Tokamachi with the local number 1234-5678:

• From within Japan: 025-75-1234-5678 (or 025-751-234-5678 if the subscriber number is 8 digits, but in this area subscriber numbers are typically 6 digits after the area code, so the format is 025-75-XXXXXX).
• From overseas: +81 25 75 1234 5678 (or +81 2575 1234 5678).

Overlay and Numbering Considerations

Currently, there is no overlay code for the 2575 area. The region uses a closed numbering plan within Japan, meaning that the area code is required for all calls, even local calls, when dialing from a different area code. However, within the same area code, callers may dial the subscriber number directly without the area code, but this is not recommended for clarity. The number length for local calls is 8 digits (area code + subscriber number), and for international calls, it is 10 digits (country code + area code without the leading zero + subscriber number).

Caller Instructions

For local callers within Tokamachi, simply dial the 6-digit subscriber number. For callers from other parts of Japan, dial 025-75-XXXXXX. For international callers, dial +81 25 75 XXXXXX. Always ensure you have the correct country code (+81) and omit the leading '0' when calling from abroad.