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Japan ☎️ Landline / Geographic

Area Code 243 – Nihonmatsu, Fukushima

The phone area code for Nihonmatsu, Fukushima is 243 (international format +81243). Browse local exchange codes (NXX) and carrier assignments below.

Current Local Time
13:30:17
Asia/Tokyo • UTC +09:00
Full Dialing Format
+81243
Population 294,237
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Admin Region Fukushima
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Elevation 77m
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GPS Coordinates 37.7500, 140.4667
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📍 Geographic Location of Nihonmatsu, Fukushima

Overview of Area Code 243

Area code 243 is a geographic dialing code assigned to the Nihonmatsu area in Fukushima Prefecture, Japan. It covers the city of Nihonmatsu and its surrounding regions, including parts of the former Adachi District. This code is part of the Japanese numbering plan administered by the Ministry of Internal Affairs and Communications (MIC) and follows the ITU-T E.164 standard.

Geographic Coverage and Administrative Jurisdiction

The 243 area code serves the northern part of Fukushima Prefecture, specifically the Nihonmatsu region. Nihonmatsu is a city known for its historical castle ruins and samurai residences. The area code also encompasses nearby towns and villages within the administrative boundaries of Nihonmatsu, such as the former towns of Adachi and Iwashiro. The region is characterized by a mix of urban and rural areas, with the city center being the primary hub for business and government services.

Dialing Formats

When calling a landline number in the Nihonmatsu area from within Japan, you must dial the trunk prefix 0, followed by the area code 243, and then the subscriber number. The subscriber number typically consists of 6 digits, making the total national significant number length 9 digits (excluding the trunk prefix). For example, a local number might be 0-243-XX-XXXX.

For international callers, the format is +81 243 XX XXXX, where +81 is the country code for Japan, and the leading 0 of the trunk prefix is omitted. So, a call from the United States to Nihonmatsu would be dialed as 011 81 243 XX XXXX.

Local calls within the same area code do not require the area code; you can dial the 6-digit subscriber number directly. However, calls from outside the area code, even from neighboring regions, must include the area code.

Overlay and Numbering Considerations

As of the latest updates, there is no overlay code for the 243 area. The numbering capacity is sufficient for the region's population and business needs. However, if you are dialing from a mobile phone, you must always include the area code, as mobile numbers are not geographically tied.

Caller Instructions

For local callers within Nihonmatsu, simply dial the 6-digit number. For callers from other parts of Japan, dial 0-243-XX-XXXX. For international callers, use +81 243 XX XXXX. Ensure you check the correct time zone difference, as Japan Standard Time (JST, UTC+9) does not observe daylight saving time.

❓ Frequently Asked Questions

What area does the 243 area code cover in Japan?
The 243 area code covers Nihonmatsu city and its surrounding areas in Fukushima Prefecture, Japan.
How do I call a Nihonmatsu number from abroad?
Dial your country's international access code, then 81 (Japan's country code), then 243, followed by the local 6-digit subscriber number. For example, from the US, dial 011 81 243 XXX XXX.
Do I need to dial the area code for local calls within Nihonmatsu?
No, for local calls within the same area code, you can dial the 6-digit subscriber number directly without the area code.
Is the 243 area code subject to number portability?
Yes, landline numbers in Japan, including those in the 243 area, are subject to number portability, allowing users to keep their numbers when switching service providers.
What is the time zone for Nihonmatsu?
Nihonmatsu is in Japan Standard Time (JST, UTC+9) and does not observe daylight saving time.