Area Code 31 – Gyeonggi

Overview of Area Code +82 31

Area code 31 is the National Destination Code (NDC) for the Gyeonggi Province of South Korea, assigned under the country's calling code +82. This geographic code covers a vast and economically significant region that surrounds the capital city of Seoul, including major cities such as Suwon, Seongnam, Anyang, Bucheon, and Goyang. The area is home to numerous corporate headquarters, industrial complexes, and residential districts, making it one of the most densely populated and dynamic telecommunications zones in the country.

Dialing Formats

When calling a landline in Gyeonggi Province from within South Korea, subscribers must dial the trunk prefix 0 followed by the area code 31 and the local subscriber number, which typically consists of 7 to 8 digits. The complete domestic format is: 0-31-XXX-XXXX (or 0-31-XXXX-XXXX for 8-digit numbers). For international callers, the format is: +82-31-XXX-XXXX (or +82-31-XXXX-XXXX). It is important to omit the leading '0' of the area code when dialing from abroad.

Geographic Coverage and Administrative Jurisdiction

The Gyeonggi Province code is allocated to the entire administrative region, which is divided into cities (si) and counties (gun). Some of the key cities covered include:

• Suwon – the provincial capital, known for Hwaseong Fortress.
• Seongnam – a major tech hub, including the Pangyo Techno Valley.
• Anyang – a commercial and transportation hub.
• Bucheon – a densely populated city with strong cultural industries.
• Goyang – host of the Korea International Exhibition Center (KINTEX).

Because the region is adjacent to Seoul, some areas may experience overlapping mobile coverage, but landline numbers remain strictly assigned to the Gyeonggi geographic area.

Overlay and Numbering Considerations

Currently, there is no overlay code for the Gyeonggi area; the 31 code is exclusive to this province. However, due to the high demand for numbers, local subscriber numbers have expanded to 8 digits in many areas. When dialing locally within the same area code, callers may omit the area code and simply dial the local number, but for clarity and to avoid misdialing, it is recommended to always use the full national format.

Caller Instructions

For local callers (within Gyeonggi): Dial the local number directly without the area code if you are in the same city, or dial 031-XXX-XXXX if calling from a different city within the province. For domestic callers from other regions: Dial 031-XXX-XXXX. For international callers: Dial your country's exit code (e.g., 011 from the US), then 82, then 31, followed by the local number. Example: +82-31-1234-5678.

Understanding the correct dialing format ensures seamless connectivity to businesses and residents in this vital economic region.