The area codes of Henan are as follows: Zhengzhou 037 1, Anyang 0372, Xinyang 0373, Luoyang 0379, Jiyuan 0380, Jiaozuo 039 1, Hebi 0392, Puyang 0393, Sanmenxia 0398, Shangqiu 0370, Xuchang 0376, Pingdingshan 0375 and Nanyang 037.
If you need to access the customer service in your hometown in a different place, you can dial the area code of your hometown first, and then dial 100 10.