Area Code +1-231-(2430000...2439999) located in Alanson, 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 : 2430000 Subscriber Number To : 2439999 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 : TELNET WORLDWIDE INC 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 : Alanson Timezone : America/Detroit Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 45.4400 Longitude : -84.7900 ‹ previous : +1-231-(2429000...2429999) next › : +1-231-(2450000...2450999) Dialling Instructions For trunk calls: 0 231 2430000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 231 2430000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2430000 ~ 2439999 (Count: 10,000) Example: +1-231-2430000 / 0111-231-2430000 (1231-2430000 / 1-231-2430000) +1-231-2430001 / 0111-231-2430001 (1231-2430001 / 1-231-2430001) +1-231-2430002 / 0111-231-2430002 (1231-2430002 / 1-231-2430002) +1-231-2430003 / 0111-231-2430003 (1231-2430003 / 1-231-2430003) +1-231-2430004 / 0111-231-2430004 (1231-2430004 / 1-231-2430004) ...+1-231-xxxxxxx / 0111-231-xxxxxxx (1231-xxxxxxx / 1-231-xxxxxxx) ...+1-231-2439995 / 0111-231-2439995 (1231-2439995 / 1-231-2439995) +1-231-2439996 / 0111-231-2439996 (1231-2439996 / 1-231-2439996) +1-231-2439997 / 0111-231-2439997 (1231-2439997 / 1-231-2439997) +1-231-2439998 / 0111-231-2439998 (1231-2439998 / 1-231-2439998) +1-231-2439999 / 0111-231-2439999 (1231-2439999 / 1-231-2439999)