Area Code +856-21-(410000...419999) 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 : 410000 Subscriber Number To : 419999 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 : +856-21-(310000...319999) next › : +856-21-(510000...519999) Dialling Instructions For trunk calls: 0 21 410000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 856 21 410000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 410000 ~ 419999 (Count: 10,000) Example: +856-21-410000 / 00856-21-410000 (021-410000 / 0-21-410000) +856-21-410001 / 00856-21-410001 (021-410001 / 0-21-410001) +856-21-410002 / 00856-21-410002 (021-410002 / 0-21-410002) +856-21-410003 / 00856-21-410003 (021-410003 / 0-21-410003) +856-21-410004 / 00856-21-410004 (021-410004 / 0-21-410004) ...+856-21-xxxxxx / 00856-21-xxxxxx (021-xxxxxx / 0-21-xxxxxx) ...+856-21-419995 / 00856-21-419995 (021-419995 / 0-21-419995) +856-21-419996 / 00856-21-419996 (021-419996 / 0-21-419996) +856-21-419997 / 00856-21-419997 (021-419997 / 0-21-419997) +856-21-419998 / 00856-21-419998 (021-419998 / 0-21-419998) +856-21-419999 / 00856-21-419999 (021-419999 / 0-21-419999)