Area Code +1-231-(4878000...4878999) located in Petoskey, 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 : 4878000 Subscriber Number To : 4878999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : NEW CINGULAR WRLS IL 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 : Petoskey Timezone : America/Detroit Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 45.3700 Longitude : -84.9500 ‹ previous : +1-231-(4877000...4877999) next › : +1-231-(4879000...4879999) Dialling Instructions For trunk calls: 0 231 4878000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 231 4878000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4878000 ~ 4878999 (Count: 1,000) Example: +1-231-4878000 / 0111-231-4878000 (1231-4878000 / 1-231-4878000) +1-231-4878001 / 0111-231-4878001 (1231-4878001 / 1-231-4878001) +1-231-4878002 / 0111-231-4878002 (1231-4878002 / 1-231-4878002) +1-231-4878003 / 0111-231-4878003 (1231-4878003 / 1-231-4878003) +1-231-4878004 / 0111-231-4878004 (1231-4878004 / 1-231-4878004) ...+1-231-xxxxxxx / 0111-231-xxxxxxx (1231-xxxxxxx / 1-231-xxxxxxx) ...+1-231-4878995 / 0111-231-4878995 (1231-4878995 / 1-231-4878995) +1-231-4878996 / 0111-231-4878996 (1231-4878996 / 1-231-4878996) +1-231-4878997 / 0111-231-4878997 (1231-4878997 / 1-231-4878997) +1-231-4878998 / 0111-231-4878998 (1231-4878998 / 1-231-4878998) +1-231-4878999 / 0111-231-4878999 (1231-4878999 / 1-231-4878999)