Area Code +1-231-(3997000...3997999) located in Frankfort, 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 : 3997000 Subscriber Number To : 3997999 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 : ACD TELECOM INC 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 : Frankfort Timezone : America/Detroit Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 44.6300 Longitude : -86.2400 ‹ previous : +1-231-(3995000...3995999) next › : +1-231-(3998000...3998999) Dialling Instructions For trunk calls: 0 231 3997000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 231 3997000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3997000 ~ 3997999 (Count: 1,000) Example: +1-231-3997000 / 0111-231-3997000 (1231-3997000 / 1-231-3997000) +1-231-3997001 / 0111-231-3997001 (1231-3997001 / 1-231-3997001) +1-231-3997002 / 0111-231-3997002 (1231-3997002 / 1-231-3997002) +1-231-3997003 / 0111-231-3997003 (1231-3997003 / 1-231-3997003) +1-231-3997004 / 0111-231-3997004 (1231-3997004 / 1-231-3997004) ...+1-231-xxxxxxx / 0111-231-xxxxxxx (1231-xxxxxxx / 1-231-xxxxxxx) ...+1-231-3997995 / 0111-231-3997995 (1231-3997995 / 1-231-3997995) +1-231-3997996 / 0111-231-3997996 (1231-3997996 / 1-231-3997996) +1-231-3997997 / 0111-231-3997997 (1231-3997997 / 1-231-3997997) +1-231-3997998 / 0111-231-3997998 (1231-3997998 / 1-231-3997998) +1-231-3997999 / 0111-231-3997999 (1231-3997999 / 1-231-3997999)
