Area Code +84-121-(0000000...9999999) located in Mobile Telephony GSM, more detail is as below. Place International Dialing Code : 84 International Prefix : 00 National Prefix : 0 National Destination Code : 121 Subscriber Number From : 0000000 Subscriber Number To : 9999999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : VNPT Group Click here to buy Vietnam Area Code Database Other Information Language Code : vi (Vietnamese) Country Number : 704 (Vietnam) Country Code : VN (Vietnam) City : Mobile Telephony GSM Timezone : Asia/Ho_Chi_Minh Coordinated Universal Time : +07:00 Daylight Saving Time : No National Significant Number Minimum Length : 10 Latitude : 10.7500 Longitude : 106.6600 next › : +84-122-(0000000...9999999) Dialling Instructions For trunk calls: 0 121 0000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 84 121 0000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 0000000 ~ 9999999 (Count: 10,000,000) Example: +84-121-0000000 / 0084-121-0000000 (0121-0000000 / 0-121-0000000) +84-121-0000001 / 0084-121-0000001 (0121-0000001 / 0-121-0000001) +84-121-0000002 / 0084-121-0000002 (0121-0000002 / 0-121-0000002) +84-121-0000003 / 0084-121-0000003 (0121-0000003 / 0-121-0000003) +84-121-0000004 / 0084-121-0000004 (0121-0000004 / 0-121-0000004) ...+84-121-xxxxxxx / 0084-121-xxxxxxx (0121-xxxxxxx / 0-121-xxxxxxx) ...+84-121-9999995 / 0084-121-9999995 (0121-9999995 / 0-121-9999995) +84-121-9999996 / 0084-121-9999996 (0121-9999996 / 0-121-9999996) +84-121-9999997 / 0084-121-9999997 (0121-9999997 / 0-121-9999997) +84-121-9999998 / 0084-121-9999998 (0121-9999998 / 0-121-9999998) +84-121-9999999 / 0084-121-9999999 (0121-9999999 / 0-121-9999999)