Telephone country code +84 is Vietnam, and +84 168 is a Viettel mobile phone.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
The telephone country code for Vietnam is +84. The area code for Bac Giang is 0240, or +84 240 in international format.
The telephone country code for Vietnam is +84. The area code for Nghe An is 038, or +84 38 in international format.
The telephone country code for Vietnam is +84. The area code for An Giang is 076, or +84 76 in international format.
The telephone country code for Vietnam is +84. The area code for Ninh Thuan is 068, or +84 68 in international format.
The telephone country code for Vietnam is +84. The area code for Can Tho is 071, or +84 71 in international format.
The telephone country code for Vietnam is +84. The area code for Ben Tre is 075, or +84 75 in international format.
The telephone country code for Vietnam is +84. The area code for Ninh Binh is 030, or +84 30 in international format.
The telephone country code for Vietnam is +84. The area code for Quang Binh is 052, or +84 52 in international format.
The telephone country code for Vietnam is +84. The area code for Quang Ngai is 055, or +84 55 in international format.
The telephone country code for Vietnam is +84. The area code for Phu Yen is 057, or +84 57 in international format.
The telephone country code for Vietnam is +84. The area code for Bac Kan is 0281, or +84 281 in international format.
The telephone country code for Vietnam is +84. The area code for Binh Dinh is 056, or +84 56 in international format.