Area Code 770 – Fangchenggang, Guangxi
The phone area code for Fangchenggang, Guangxi is 770 (international format +86770). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 770
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Fangchenggang, Guangxi
Geographic Overview
The +86 770 area code is a geographic National Destination Code (NDC) assigned to Fangchenggang, a prefecture-level city in the Guangxi Zhuang Autonomous Region of southern China. Fangchenggang is a major port city and industrial hub, bordering Vietnam to the southwest. The area code covers the city's urban districts (Gangkou and Fangcheng) as well as its surrounding counties and townships, including Dongxing (a border city) and Shangsi County. As part of China's closed numbering plan, the area code is used for all fixed-line (PSTN) and fixed wireless services within this administrative region.
Dialing Formats
When calling a Fangchenggang fixed-line number from within China, you must dial the trunk prefix '0' followed by the area code and the subscriber number. For example, a local number such as 1234567 would be dialed as 0770 1234567 from other parts of China. From outside China, callers should use the international access prefix (e.g., 00 or +) followed by China's country code 86, then the area code without the leading '0', and the subscriber number: +86 770 1234567. Note that the subscriber number length is typically 7 digits, resulting in a total national significant number (NSN) of 11 digits when including the area code.
Local Call Instructions
Within Fangchenggang, local calls between fixed-line subscribers are made by dialing only the 7-digit subscriber number (without the area code). However, due to the implementation of an overlay system in some parts of Guangxi, certain areas may require 10-digit dialing (area code + subscriber number) even for local calls. As of the latest ITU-T recommendations, Fangchenggang does not have an overlay code, but users should verify with their service provider if any changes have been implemented. For callers from mobile phones, it is always safe to dial the full number with the area code, as mobile networks route calls based on the complete number.
Caller Guidance
For international callers, it is essential to omit the trunk prefix '0' when dialing from abroad. Always use the plus sign (+) when dialing from a mobile device to ensure proper international routing. For example, to call a business in Fangchenggang from the United States, you would dial: 011 86 770 1234567. If you are traveling within China and need to call a Fangchenggang number, simply dial 0770 1234567 from any phone, including mobiles. Remember that calls to this geographic area code are charged as domestic long-distance when dialed from outside Guangxi, and international rates apply when dialing from outside China.