Area Code 513 – Nantong, Jiangsu
The phone area code for Nantong, Jiangsu is 513 (international format +86513). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 513
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Nantong, Jiangsu
Overview
The +86 513 area code is a geographic National Destination Code (NDC) assigned to Nantong, a major prefecture-level city in Jiangsu Province, China. Nantong is a key industrial and port city located on the northern bank of the Yangtze River estuary, opposite Shanghai. The area code covers the entire administrative region of Nantong, including its urban districts (Chongchuan, Gangzha, Tongzhou, Haimen) and surrounding counties and county-level cities (Rudong, Qidong, Rugao, Hai'an).
Dialing Formats
For local callers within Nantong, the area code is omitted, and the 8-digit local subscriber number is dialed directly. For example, to call a Nantong landline from within the city, dial the 8-digit number only. For callers outside Nantong but within China, the national trunk prefix 0 must be used before the area code: 0 513 XXXX XXXX. International callers should use the country code +86, followed by the area code without the leading zero: +86 513 XXXX XXXX.
Number Structure
Nantong local numbers are 8 digits long, making the total length of a domestic number (including trunk prefix and area code) 12 digits, and an international number 13 digits (including country code). The numbering plan is closed, meaning the area code is mandatory for all calls outside the local area.
Overlay and Regulatory Notes
Currently, there are no overlay codes in Nantong; the 513 code is the sole geographic code for the region. However, with the increasing demand for telecommunication services, the MIIT (Ministry of Industry and Information Technology) may introduce additional codes in the future. It is important to note that mobile numbers in China always begin with 1 (e.g., 13X, 15X, 18X) and are not tied to geographic area codes; thus, +86 513 is exclusively for fixed-line and some VoIP services.
Caller Instructions
For local callers within Nantong, dial the 8-digit subscriber number directly. For domestic callers from other cities in China, dial 0-513-XXXX XXXX. For international callers, dial +86-513-XXXX XXXX (or 011-86-513-XXXX XXXX from North America). Always ensure the correct number of digits is used; omitting the area code when calling from outside Nantong will result in a failed call.