Area Code 313 – Zhangjiakou, Hebei
The phone area code for Zhangjiakou, Hebei is 313 (international format +86313). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 313
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Zhangjiakou, Hebei
Geographic Coverage and Administrative Jurisdiction
The area code 313 is a geographic destination code within the Chinese national numbering plan, allocated to the prefecture-level city of Zhangjiakou in Hebei Province. Zhangjiakou is situated in the northwestern part of Hebei, bordering Beijing to the southeast. The code covers the entire administrative area of Zhangjiakou, including its urban districts (e.g., Qiaoxi, Qiaodong, and Chongli) and all subordinate counties and county-level cities (e.g., Zhuolu, Huailai, and Zhangbei).
Dialing Formats and Caller Instructions
For domestic callers within China, the local dialing format is 0313 followed by the 7-digit subscriber number, resulting in a total of 11 digits when including the trunk prefix '0'. For example, a local call to a Zhangjiakou landline would be dialed as 0313-XXXXXXX. However, when calling from outside China, the international format requires the country code +86, the area code without the leading '0', and the subscriber number. Thus, an international caller would dial +86 313 XXXXXXX. It is crucial to note that the leading '0' is a domestic trunk prefix and must be omitted for international calls.
Overlays and Numbering Considerations
Currently, there is no overlay code for Zhangjiakou; the 313 code is exclusive to the region. However, as the demand for telecommunication services grows, the local telecom regulator may introduce additional area codes or overlay plans. For now, all landline numbers in Zhangjiakou share the same 7-digit length, and no special dialing procedures are required for local calls beyond the standard 8-digit local number (area code + subscriber number) when calling from other cities in China.
Service Providers and Network Infrastructure
The code is used by all three major Chinese telecom operators—China Telecom, China Unicom, and China Mobile—for their fixed-line and PSTN services. In recent years, VoIP and IP-based services have also been integrated, but the geographic nature of the code remains unchanged, meaning that the number is tied to the physical location of the line. For emergency services and government hotlines, the code is also used, ensuring that calls are routed to the appropriate local call centers.
Practical Guidance for Callers
For domestic callers outside Zhangjiakou, dial 0313 plus the 7-digit number. For international callers, replace the leading '0' with the country code: +86 313 plus the 7-digit number. Always verify the subscriber number length, as it is fixed at 7 digits. If you are unsure about the number, contact your telecom provider for assistance.