Area Code +66-54-(000000...999999) located in Lampang, Payao, Phrae and Nan, Northern Region, more detail is as below. Place International Dialing Code : 66 International Prefix : 001 National Prefix : 0 National Destination Code : 54 Subscriber Number From : 000000 Subscriber Number To : 999999 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 : Telephone Organization of Thailand (TOT) Click here to buy Thailand Area Code Database Other Information Language Code : th (Thai) Country Number : 764 (Thailand) Country Code : TH (Thailand) Region Name : Northern Region City : Lampang, Payao, Phrae and Nan Timezone : Asia/Bangkok Coordinated Universal Time : +07:00 Daylight Saving Time : No National Significant Number Minimum Length : 8 Latitude : 18.7400 Longitude : 99.7200 ‹ previous : +66-53-(000000...999999) next › : +66-55-(000000...999999) Dialling Instructions For trunk calls: 0 54 000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 001 66 54 000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 000000 ~ 999999 (Count: 1,000,000) Example: +66-54-000000 / 00166-54-000000 (054-000000 / 0-54-000000) +66-54-000001 / 00166-54-000001 (054-000001 / 0-54-000001) +66-54-000002 / 00166-54-000002 (054-000002 / 0-54-000002) +66-54-000003 / 00166-54-000003 (054-000003 / 0-54-000003) +66-54-000004 / 00166-54-000004 (054-000004 / 0-54-000004) ...+66-54-xxxxxx / 00166-54-xxxxxx (054-xxxxxx / 0-54-xxxxxx) ...+66-54-999995 / 00166-54-999995 (054-999995 / 0-54-999995) +66-54-999996 / 00166-54-999996 (054-999996 / 0-54-999996) +66-54-999997 / 00166-54-999997 (054-999997 / 0-54-999997) +66-54-999998 / 00166-54-999998 (054-999998 / 0-54-999998) +66-54-999999 / 00166-54-999999 (054-999999 / 0-54-999999)