Instructions for the use of Hangzhou area code: The domestic long-distance area code of Hangzhou, Zhejiang Province is 0571, and it is also written as 0571, 0571-, (0571) and (0571). Of course, the 0 in front of Hangzhou area code can be ignored, and the area code is also written as 571, 571-, (571) and (571), and the international added in front of Hangzhou area code is written according to international standards.