Area Code 2957 – Daigo, Ibaraki

Overview of Area Code 2957

Area code 2957 is a geographic National Destination Code (NDC) within the Japanese numbering plan, assigned to the town of Daigo in Ibaraki Prefecture. Daigo is located in the northern part of Ibaraki, bordering Fukushima and Tochigi prefectures. The code covers the town area and its administrative subdivisions, including the former villages of Satomi and Yamasa, which merged to form the current municipality. The region is known for its scenic mountains and the Kuji River, and it is a relatively rural area with a modest population.

Dialing Formats

When calling a landline in Daigo from within Japan, you must dial the trunk prefix 0 followed by the area code 2957 and the subscriber number. The local subscriber numbers are typically 4 to 5 digits long, making the total domestic number length 10 digits (including the leading 0). For example, a local number might appear as 0-2957-2-XXXX or 0-2957-XX-XXXX depending on the specific subscriber line.

For international callers, the format is +81 2957-XXXXXX (or +81 2957-XX-XXXX), where the leading 0 is omitted. For instance, if the domestic number is 0-2957-2-1234, the international format would be +81 2957-2-1234.

Geographic Coverage and Administration

Daigo is the only city or town served by this area code. It is part of the Kuji District in Ibaraki Prefecture. The area code is administered by the Ministry of Internal Affairs and Communications (MIC) and is allocated to Nippon Telegraph and Telephone East (NTT East) for fixed-line services. As of recent years, there have been no overlay plans announced for this code, meaning that the 10-digit dialing (including the trunk prefix) is mandatory for all local calls within the same area code. However, since the area is small, most calls are local and do not require additional prefixes.

Caller Instructions

For local callers within Daigo: If you are calling a number within the same area code, you must still dial the full number including the area code, as per Japanese dialing regulations. For example, to call a neighbor, you would dial 0-2957-2-XXXX.

For callers from other parts of Japan: Dial 0-2957-XXXXXX (including the trunk prefix 0). For example, from Tokyo, you would dial 0-2957-2-1234.

For international callers: Replace the leading 0 with the country code +81 and drop the trunk prefix. So, from the United States, you would dial 011 81 2957-2-1234 or +81 2957-2-1234.

Important Considerations

As with all Japanese geographic numbers, calls to 2957 numbers are typically charged at standard domestic rates when dialed from within Japan. When dialed from abroad, international rates apply. The area code is not portable to mobile numbers, and mobile numbers in the region use the 070, 080, or 090 prefixes, which are non-geographic. If you are trying to reach a business or resident in Daigo, ensure you have the correct 5-digit subscriber number, as some numbers may have been migrated to IP-based services but retain the same geographic code.