Area Code 58 – Chiayi/Yunlin
The phone area code for Chiayi/Yunlin is 58 (international format +88658). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Chiayi/Yunlin
Geographic Coverage and Administrative Jurisdiction
The +886 58 country-code prefix is the ITU-T E.164 National Destination Code (NDC) assigned to the geographic area encompassing Chiayi City, Chiayi County, and Yunlin County in western Taiwan. This region is part of the Chianan Plain, a major agricultural and industrial zone. The prefix covers both urban centers and rural townships, including the provincial cities of Chiayi and Douliu (the county seat of Yunlin).
Dialing Formats and Number Structure
Within Taiwan, calls to landlines in the Chiayi/Yunlin area require dialing the trunk prefix 0 followed by the area code 58 and the subscriber number. The complete national significant number (NSN) is 9 digits, excluding the leading 0. Thus, a typical local number appears as 0-58-XXXXXXX when dialed domestically. For international callers, the format is +886 58 XXXXXXX (or 886-58-XXXXXXX), where the leading 0 is omitted.
It is important to note that the subscriber number length may vary, but the total NSN length remains fixed at 9 digits. For example, a call from the United States to a Chiayi landline would be dialed as 011 886 58 1234567 (using a placeholder subscriber number).
Overlay and Numbering Considerations
As of the latest ITU-T recommendations and Taiwan's National Communications Commission (NCC) regulations, the 58 area code is not subject to an overlay. The numbering plan is closed, and all geographic area codes in Taiwan are assigned to specific administrative regions. No changes are anticipated in the near term, but users should verify with their service provider for any routing updates.
Caller Instructions
Local callers within the 58 area must dial the area code even for calls within the same city, as Taiwan uses a closed dialing plan. Domestic callers from other regions in Taiwan must dial 0-58-XXXXXXX. International callers should replace the trunk prefix 0 with the country code +886, resulting in +886 58 XXXXXXX. Ensure that you drop any leading zeros from the area code when dialing from abroad.
Practical Examples
- Calling a Chiayi landline from Taipei: 0-58-XXXXXXX
- Calling a Yunlin landline from Japan: +886 58 XXXXXXX
- Calling a Chiayi landline from the UK: 00 886 58 XXXXXXX
These formats ensure proper routing through the PSTN and VoIP networks. For VoIP users, the same international format applies, and the call will be terminated as a geographic call, subject to the destination's local tariffs.