Area Code +975-4-(640000...641999) located in Mongar, more detail is as below. Place International Dialing Code : 975 International Prefix : 00 National Destination Code : 4 Subscriber Number From : 640000 Subscriber Number To : 641999 National Destination Code Length : 1 Uses National Destination Code : Yes National Significant Number Length : 7 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : Bhutan Telecom Click here to buy Bhutan Area Code Database Other Information Language Code : dz (Bhutani) Country Number : 64 (Bhutan) Country Code : BT (Bhutan) City : Mongar Timezone : Asia/Thimphu Coordinated Universal Time : +06:00 Daylight Saving Time : No National Significant Number Minimum Length : 7 Latitude : 27.2800 Longitude : 91.2400 ‹ previous : +975-4-(580000...581999) next › : +975-4-(670400...670499) Dialling Instructions For trunk calls: - 4 640000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 975 4 640000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 640000 ~ 641999 (Count: 2,000) Example: +975-4-640000 / 00975-4-640000 (4-640000 / -4-640000) +975-4-640001 / 00975-4-640001 (4-640001 / -4-640001) +975-4-640002 / 00975-4-640002 (4-640002 / -4-640002) +975-4-640003 / 00975-4-640003 (4-640003 / -4-640003) +975-4-640004 / 00975-4-640004 (4-640004 / -4-640004) ...+975-4-xxxxxx / 00975-4-xxxxxx (4-xxxxxx / -4-xxxxxx) ...+975-4-641995 / 00975-4-641995 (4-641995 / -4-641995) +975-4-641996 / 00975-4-641996 (4-641996 / -4-641996) +975-4-641997 / 00975-4-641997 (4-641997 / -4-641997) +975-4-641998 / 00975-4-641998 (4-641998 / -4-641998) +975-4-641999 / 00975-4-641999 (4-641999 / -4-641999)