Area Code 43 – Chungbuk

Overview of Area Code +82 43

Area code 43 is the National Destination Code (NDC) for the Chungcheongbuk-do province, commonly known as Chungbuk, in South Korea. This geographic code is assigned under the country calling code +82 and is used for fixed-line (PSTN) services within the province. The region is administratively divided into the capital city Cheongju, along with other major cities and counties such as Chungju, Jecheon, and Yeongdong.

Geographic Coverage and Dialing Formats

The +82 43 area code covers all landline numbers in Chungbuk, including the cities of Cheongju (including Heungdeok, Sangdang, Seowon, and Cheongwon districts), Chungju, Jecheon, and the counties of Boeun, Okcheon, Yeongdong, Jincheon, Goesan, Eumseong, Danyang, and Jeungpyeong. Subscriber numbers within this area code are typically 7 to 8 digits long, depending on the specific local exchange and the number of subscribers served.

For local calls within the same area code, callers can dial the subscriber number directly without the area code. However, for calls from outside the area code but within South Korea, the national trunk prefix 0 must be dialed, followed by the area code and subscriber number. The international format for dialing from abroad is +82 43 XXXX YYYY (or +82 43 XXX YYYY for shorter numbers), where the leading '0' of the national prefix is omitted.

Caller Instructions and Number Portability

When calling a Chungbuk landline from overseas, dial the international access code (e.g., 011 from the US, 00 from most countries), then South Korea's country code 82, followed by the area code 43 without the leading zero, and the local subscriber number. For example, to call a number in Cheongju with the local number 123-4567, you would dial +82 43 123 4567 from any international location.

South Korea has implemented local number portability, allowing subscribers to retain their numbers when switching between fixed-line operators. However, the geographic area code remains tied to the physical location of the line, as it is used for routing calls based on the subscriber's registered address. Overlay codes have not been introduced in Chungbuk, so the 43 area code remains the sole geographic code for the province.

For callers within Chungbuk, local calls are typically charged at a lower rate, while calls from other regions may incur long-distance charges. VoIP and mobile calls to +82 43 numbers are routed through the PSTN and may be subject to different tariff structures depending on the service provider.