Area Code 276 – Ota, Gunma

Geographic Coverage and Administrative Jurisdiction

The area code 276 is a geographic National Destination Code (NDC) assigned to the city of Ota and its surrounding areas within Gunma Prefecture, Japan. Ota is a major industrial and commercial hub located in the southeastern part of Gunma, bordering Saitama Prefecture. The jurisdiction includes the city of Ota itself, along with adjacent towns such as Oizumi, Chiyoda, and parts of Tatebayashi. The region is known for its manufacturing base, particularly in the automotive and precision machinery sectors, and is home to a significant population of Brazilian and Peruvian residents due to historical industrial ties.

Dialing Formats and Caller Instructions

When dialing a landline number in Ota from within Japan, the trunk prefix 0 is used, followed by the area code 276 and the subscriber number. The complete national format is 0-276-XX-XXXX, where the subscriber number consists of seven digits. For example, a typical local number might be 0-276-45-6789.

For international callers, the country code for Japan is +81, and the leading zero of the area code is dropped. Thus, the international format becomes +81-276-XX-XXXX. For instance, to call the same number from abroad, you would dial +81 276 45 6789.

Local callers within the Ota area can often dial the subscriber number directly without the area code, depending on the specific telephone exchange configuration. However, for clarity and to avoid misdialing, it is recommended to use the full national format when calling from mobile phones or other regions.

Overlay and Numbering Considerations

As of the latest ITU-T and Japanese Ministry of Internal Affairs and Communications (MIC) records, there is no overlay code for the 276 area. The numbering plan remains a single NDC for this geographic region, meaning that all landline numbers within the Ota area share the 276 prefix. This simplifies dialing procedures and reduces the risk of number exhaustion in the near term.

Practical Information for Callers

For domestic callers outside the Ota area, always include the trunk prefix and area code: 0-276-XX-XXXX. For international callers, ensure you have the correct country code and drop the leading zero: +81-276-XX-XXXX. Calls to this geographic number are typically charged at standard domestic rates when dialed from within Japan, and international rates when dialed from abroad. It is also important to note that some businesses in Ota may use VoIP services, which can affect call quality and routing, but the dialing format remains unchanged.

For any assistance with dialing or to verify the correct number, consult your telecom provider or refer to the official numbering resources provided by the Japanese government.