Area Code 56 – Chiayi/Yunlin

Overview of Area Code +886 56

Area code 56 is a geographic National Destination Code (NDC) within the Taiwan telephone numbering plan, administered by the National Communications Commission (NCC). It serves the Chiayi and Yunlin regions of western Taiwan. This code is used for fixed-line (PSTN) services, including residential, business, and government lines. When dialing internationally, the full number format is +886 56 XXX XXX (or +886 56 XXXX XXX depending on local line density). The code is not portable to mobile numbers; mobile services in Taiwan use separate non-geographic prefixes (e.g., 09).

Geographic Coverage and Administrative Jurisdiction

The 56 code covers two administrative divisions: Chiayi County and Chiayi City (which together form the Chiayi–Yunlin region) and Yunlin County. Key cities and towns within this area include Chiayi City (the provincial municipality), Douliu (county seat of Yunlin), Dalin, Beigang, Xingang, and Huwei. The region is known for its agricultural production, scenic Alishan mountain area, and cultural heritage sites. The code is assigned to fixed-line operators such as Chunghwa Telecom and other licensed local exchange carriers.

Dialing Formats and Caller Instructions

For local callers within the Chiayi/Yunlin area, the area code is typically omitted when dialing another local number; you simply dial the 7- or 8-digit subscriber number. For example, to call a local number 1234567, you would dial 1234567 from a landline within the same area. However, when calling from a mobile phone or from outside the area code region, you must include the trunk prefix 0 and the area code: 05 6 XXX XXX (note: the area code is 56, but when dialed domestically it is preceded by the trunk prefix 0, resulting in 056). For international callers, the format is +886 56 XXX XXX (drop the leading 0). For example, a number in Chiayi City might be dialed as +886 5 6 1234567 from abroad.

Numbering Structure and Overlay Considerations

Taiwan uses an open dialing plan for fixed lines. The subscriber number length within the 56 area can vary from 6 to 8 digits, depending on the specific exchange and historical allocation. As of the latest NCC guidelines, there is no overlay code for this area; the 56 code remains exclusive to the Chiayi/Yunlin region. However, due to number exhaustion, some new lines may be assigned 8-digit subscriber numbers. Always verify the complete number with the called party to ensure correct dialing.

Practical Tips for Callers

When calling from overseas, ensure you have the correct country code (+886), area code (56), and the local number. Avoid omitting the area code when dialing from a mobile phone within Taiwan but outside the region. For VoIP or international calling services, always use the +886 format for reliable routing. If you encounter difficulties, check with your service provider for any specific dialing requirements.