Area Code +856-21-(210000...219999) located in Vientiane, more detail is as below. Place International Dialing Code : 856 International Prefix : 00 National Prefix : 0 National Destination Code : 21 Subscriber Number From : 210000 Subscriber Number To : 219999 National Destination Code Length : 2 Uses National Destination Code : Yes National Significant Number Length : 8 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : Laotel Click here to buy Laos Area Code Database Other Information Language Code : lo (Laothian) Country Number : 418 (Laos) Country Code : LA (Laos) City : Vientiane Timezone : Asia/Vientiane Coordinated Universal Time : +07:00 Daylight Saving Time : No National Significant Number Minimum Length : 8 Latitude : 17.9600 Longitude : 102.6100 ‹ previous : +856-20-(99000000...99999999) next › : +856-21-(310000...319999) Dialling Instructions For trunk calls: 0 21 210000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 856 21 210000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 210000 ~ 219999 (Count: 10,000) Example: +856-21-210000 / 00856-21-210000 (021-210000 / 0-21-210000) +856-21-210001 / 00856-21-210001 (021-210001 / 0-21-210001) +856-21-210002 / 00856-21-210002 (021-210002 / 0-21-210002) +856-21-210003 / 00856-21-210003 (021-210003 / 0-21-210003) +856-21-210004 / 00856-21-210004 (021-210004 / 0-21-210004) ...+856-21-xxxxxx / 00856-21-xxxxxx (021-xxxxxx / 0-21-xxxxxx) ...+856-21-219995 / 00856-21-219995 (021-219995 / 0-21-219995) +856-21-219996 / 00856-21-219996 (021-219996 / 0-21-219996) +856-21-219997 / 00856-21-219997 (021-219997 / 0-21-219997) +856-21-219998 / 00856-21-219998 (021-219998 / 0-21-219998) +856-21-219999 / 00856-21-219999 (021-219999 / 0-21-219999)