Area code 69. 69 is the special area code dedicated for the Ministry of Defence (Vietnam) and the Ministry of Public Security (Vietnam).. Mobile telephone numbers . In Vietnam, mobile phone numbers follow the format 09x-xxxxxxx or new prefixes: 03x, 05x, 07x, 08x.. The first 0 is the trunk code.; The next 2 digits (3x, 5x, 7x, 8x or 9y) specify the mobile phone operator.

Telephone numbers in Hong Kong are mostly eight-digit. Fixed land line numbers start with 2 or 3, mobile (cellular) phone numbers with 5, 6, 7 or 9, pager numbers with 7 and forwarding service with 8. Since the end of 1989, there have been no area codes within Hong Kong.. The telephone number for emergency services – Police, Fire Service and Ambulance – is 999 for all telephone …