Hong Kong Country Code
For data processing and communications and Hong Kong and it's dependent areas is represent by a Hong Kong Country code. Hong Kong country code is a short numeric geographical code (geocodes) developed by the ISO 3166-1 system. Hong Kong country code is freqently refered to as Hong Kong dialing codes or Hong Kong E.164 calling code.
Hong Kong Country Code is used when dialing to Hong Kong from outside Hong Kong. Hong Kong Country Code is however not used when dialing within Hong Kong.
To call Hong Kong from outside Hong Kong, you have to dial the your own country's International Direct Dialing prefix (IDD), Hong Kong Country Code, City/ Area Code, and then the subscriber telephone number as:
Your Countries International Direct Dialing Prefix (IDD) +852 (Hong Kong Country Code) + City Area Code + Number you wish to call.
When dialing from a mobile phone outside Hong Kong into Hong Kong, Dial '+' +852 (Hong Kong Country Code) + City Area Code + Number you wish to call. (The "+" can be reached by holding down the "0" key until it turns into a "+". The "+" is universal prefix for all international mobile telephone calls including Hong Kong)
Hong Kong International Direct Dialing prefix (or IDD) is used when dialing from the Hong Kong to outside the country (Refer to international dialing Hong Kong code or Hong Kong international access code). Do not use Hong Kong IDD when dialing within Hong Kong.
Hong Kong National Direct Dialing prefix (or NDD) is used when dialing to a destination within the Hong Kong (Refer to dialing Hong Kong code). Do not use Hong Kong National Direct Dialing prefix when dialing from outside Hong Kong into Hong Kong. Hong Kong NDD is only used as long distance dialing within the country.
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