Area Code +1-231-(3780000...3789999) located in Copemish-Thompsonville, Michigan (MI), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 231 Subscriber Number From : 3780000 Subscriber Number To : 3789999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : ACE TEL CO OF MI Click here to buy United States Area Code Database Other Information Language Code : en (English) Country Number : 840 (United States) Country Code : US (United States) Region Code : MI Region Name : Michigan City : Copemish-Thompsonville Timezone : America/Detroit Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 44.4900 Longitude : -85.9400 ‹ previous : +1-231-(3779000...3779999) next › : +1-231-(3820000...3829999) Dialling Instructions For trunk calls: 0 231 3780000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 231 3780000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3780000 ~ 3789999 (Count: 10,000) Example: +1-231-3780000 / 0111-231-3780000 (1231-3780000 / 1-231-3780000) +1-231-3780001 / 0111-231-3780001 (1231-3780001 / 1-231-3780001) +1-231-3780002 / 0111-231-3780002 (1231-3780002 / 1-231-3780002) +1-231-3780003 / 0111-231-3780003 (1231-3780003 / 1-231-3780003) +1-231-3780004 / 0111-231-3780004 (1231-3780004 / 1-231-3780004) ...+1-231-xxxxxxx / 0111-231-xxxxxxx (1231-xxxxxxx / 1-231-xxxxxxx) ...+1-231-3789995 / 0111-231-3789995 (1231-3789995 / 1-231-3789995) +1-231-3789996 / 0111-231-3789996 (1231-3789996 / 1-231-3789996) +1-231-3789997 / 0111-231-3789997 (1231-3789997 / 1-231-3789997) +1-231-3789998 / 0111-231-3789998 (1231-3789998 / 1-231-3789998) +1-231-3789999 / 0111-231-3789999 (1231-3789999 / 1-231-3789999)