Area Code 9979 – Tokunoshima, Kagoshima

Overview of Area Code 9979

Area code 9979 is a geographic numbering plan area within the Japanese telecommunications network, specifically assigned to Tokunoshima, an island located in the Amami Islands chain of Kagoshima Prefecture. This code is part of the Kagoshima Prefecture numbering group and is used for fixed-line (PSTN) services on the island. Tokunoshima is known for its subtropical climate, sugar cane production, and traditional bullfighting festivals, and it serves as a residential and agricultural hub for the surrounding islands.

Geographic Coverage and Administrative Jurisdiction

The 9979 area code covers the entire island of Tokunoshima, which is administratively divided into three towns: Tokunoshima Town, Isen Town, and Amagi Town. All fixed-line numbers on the island fall under this code, and there are no overlay codes or alternative geographic codes assigned to the island. The code is managed by the Ministry of Internal Affairs and Communications (MIC) and allocated to Nippon Telegraph and Telephone (NTT) East and other local carriers for fixed-line services.

Dialing Formats

When calling a fixed-line number on Tokunoshima from within Japan, you must dial the trunk prefix 0, followed by the area code 9979 and the subscriber number. The subscriber number typically consists of 5 to 6 digits, making the total national significant number length 10 digits (including the leading 0). For example, a local number might be 0-9979-2-XXXX or 0-9979-XX-XXXX depending on the specific exchange.

For international callers, the format is: +81 9979 XXXX (drop the leading 0). For instance, if the national number is 0-9979-2-1234, the international dialing format would be +81 9979 2 1234.

Caller Instructions

Local callers within Tokunoshima can often dial just the subscriber number without the area code, but this depends on the local exchange configuration. For calls from outside the area code but within Japan, dial 0-9979-XXXXXX. International callers should replace the leading 0 with +81 and omit any international access codes. It is important to note that while mobile phones are widely used on the island, mobile numbers use different prefixes (e.g., 090, 080, 070) and are not part of the 9979 geographic code.

Additional Considerations

As with all Japanese geographic area codes, numbers under 9979 are subject to number portability within the same geographic area, allowing subscribers to switch carriers while retaining their numbers. However, they cannot be ported to non-geographic services. The code is exclusively for fixed-line services; VoIP services may use the same code but are typically identified by their service provider. For emergency services, dial 110 (police) or 119 (fire/ambulance) regardless of the area code.