Area Code +66-52-(000000...999999) located in Chiang Mai, Lamphun, Mae Hong Son and Chiang Rai, Northern Region, more detail is as below. Place International Dialing Code : 66 International Prefix : 001 National Prefix : 0 National Destination Code : 52 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 : Chiang Mai, Lamphun, Mae Hong Son and Chiang Rai Timezone : Asia/Bangkok Coordinated Universal Time : +07:00 Daylight Saving Time : No National Significant Number Minimum Length : 8 Latitude : 18.8000 Longitude : 98.6600 ‹ previous : +66-45-(000000...999999) next › : +66-53-(000000...999999) Dialling Instructions For trunk calls: 0 52 000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 001 66 52 000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 000000 ~ 999999 (Count: 1,000,000) Example: +66-52-000000 / 00166-52-000000 (052-000000 / 0-52-000000) +66-52-000001 / 00166-52-000001 (052-000001 / 0-52-000001) +66-52-000002 / 00166-52-000002 (052-000002 / 0-52-000002) +66-52-000003 / 00166-52-000003 (052-000003 / 0-52-000003) +66-52-000004 / 00166-52-000004 (052-000004 / 0-52-000004) ...+66-52-xxxxxx / 00166-52-xxxxxx (052-xxxxxx / 0-52-xxxxxx) ...+66-52-999995 / 00166-52-999995 (052-999995 / 0-52-999995) +66-52-999996 / 00166-52-999996 (052-999996 / 0-52-999996) +66-52-999997 / 00166-52-999997 (052-999997 / 0-52-999997) +66-52-999998 / 00166-52-999998 (052-999998 / 0-52-999998) +66-52-999999 / 00166-52-999999 (052-999999 / 0-52-999999)