Area Code 977 – Beppu, Oita

Overview of Area Code 977

Area code 977 is a geographic numbering plan area within the Japanese telephone numbering system, specifically assigned to the city of Beppu and its surrounding areas in Oita Prefecture, located on the island of Kyushu. This code is part of the national numbering plan administered by the Ministry of Internal Affairs and Communications (MIC) and follows the ITU-T E.164 standard for international dialing. Beppu is renowned for its hot springs (onsen) and is a major tourist destination, which influences the demand for telecommunications services in the region.

Geographic Coverage and Administrative Jurisdiction

The 977 area code covers the city of Beppu and, depending on the specific numbering plan, may also include parts of neighboring municipalities such as Hiji Town and Kitsuki City. Administratively, these areas fall under Oita Prefecture. The code is classified as a geographic code, meaning that the number is tied to a physical location, and calls are routed based on the destination's central office. The region is served by Nippon Telegraph and Telephone (NTT) and other licensed telecommunications carriers, which provide both fixed-line and VoIP services.

Dialing Formats and Instructions

For local callers within the 977 area code, the national significant number (NSN) is 8 digits long, consisting of the area code (977) followed by a 5-digit subscriber number. For example, a local number might be 977-XX-XXXX. When dialing from another area code within Japan, callers must prefix the NSN with the trunk prefix '0', resulting in 0-977-XX-XXXX. For international callers, the country code for Japan is +81, and the leading '0' is dropped. Thus, an international caller would dial +81-977-XX-XXXX. It is important to note that the area code is required for all calls, even local ones, as Japan uses a closed numbering plan for fixed-line calls.

Overlay and Numbering Considerations

As of the latest information, there is no overlay code for the 977 area, meaning that the area code is unique to this region. However, with the increasing adoption of VoIP and the potential for number portability, subscribers may retain their numbers when switching carriers, but the geographic association remains. For businesses and residents, understanding the correct dialing format is crucial to avoid misdialing, especially for international tourists who may need to contact local services.

Caller Instructions

For local callers: simply dial the 8-digit number (977-XX-XXXX). For callers from other parts of Japan: dial 0-977-XX-XXXX. For international callers: dial your country's exit code, then 81, then 977-XX-XXXX. Always verify the subscriber number length, as some numbers may be shorter due to legacy assignments, but the standard length is 5 digits after the area code.