The area code of Hong Kong is 852. Area code is a number used to identify a specific area or city in the telephone network. The area code of Hong Kong is 852. When you call other countries or regions from Hong Kong, you need to add the area code of that country or region before the phone number. Similarly, when other people call Hong Kong from their country or region, they also need to add the area code of Hong Kong, that is, 852, before the phone number.

The allocation of this area code is managed by the International Telecommunication Union (ITU). Each country or region is assigned one or more area codes to uniquely identify them in the global telephone network.

Generally speaking, when you need to call Hong Kong, whether from Hong Kong or other countries or regions, you need to use the area code 852. This enables the global telephone system to accurately route your phone to the correct destination.