Area Code 317 – Cangzhou, Hebei

Overview of Area Code 317 in China

Area code 317 is a geographic National Destination Code (NDC) assigned to the city of Cangzhou, located in Hebei Province, People's Republic of China. Under the ITU-T E.164 international numbering plan, the full country calling code for China is +86, and when dialing a Cangzhou landline from abroad, the international format is +86 317 XXX XXXX. Domestically, within China, the trunk prefix '0' is used before the area code, so callers dial 0317 XXX XXXX. This prefix is exclusively for fixed-line (PSTN) services, including traditional copper lines and some fixed wireless terminals. It is not used for mobile numbers, which in China are assigned non-geographic 11-digit numbers beginning with 1 (e.g., 13X, 15X, 18X).

Geographic Coverage and Administrative Jurisdiction

Cangzhou is a prefecture-level city in the eastern part of Hebei Province, bordering the Bohai Sea. The area code 317 covers the entire administrative jurisdiction of Cangzhou, including its urban districts (Yunhe, Xinhua), and all subordinate counties and county-level cities, such as Botou, Renqiu, Huanghua, Hejian, Cang County, Qing County, Dongguang, Haixing, Yanshan, Suning, and Nanpi. The city is an important industrial and port hub, with the Huanghua Port serving as a major maritime gateway. The numbering area is contiguous, meaning that all landline subscribers within these administrative boundaries share the same area code.

Dialing Formats and Caller Instructions

• Local calls within Cangzhou: If you are calling from another fixed-line or mobile phone within the same area code (0317), you typically dial only the 7-digit local subscriber number (XXX XXXX). However, some areas may require the full 8-digit number including the area code for calls between different districts or when using certain VoIP services.
• Domestic long-distance calls from other parts of China: Dial the trunk prefix 0 followed by the area code and the subscriber number: 0 317 XXX XXXX. For example, to call a Cangzhou landline from Beijing, you would dial 0317 123 4567.
• International calls from outside China: Dial the international access prefix (e.g., 00 from most countries, or + from mobile phones), then China's country code 86, then the area code without the leading 0, and the subscriber number: +86 317 XXX XXXX. For instance, from the United States, you would dial 011 86 317 123 4567.

Overlays and Numbering Changes

As of the current ITU-T national numbering plan, area code 317 has not been overlaid with another area code. The number length for landlines in Cangzhou is 7 digits (subscriber number) plus the 3-digit area code, resulting in a total of 10 digits for domestic calls (including the trunk prefix 0). No recent changes to the dialing procedure have been implemented, but users should always check with their service provider for any local dialing variations, especially when using VoIP or enterprise telephony systems that may require the full national number.