Area Code +1-203-(4390000...4390999) located in Cheshire, Connecticut (CT), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 203 Subscriber Number From : 4390000 Subscriber Number To : 4390999 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 : COX CT TELCOM 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 : CT Region Name : Connecticut City : Cheshire Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 41.5100 Longitude : -72.9000 ‹ previous : +1-203-(4380000...4389999) next › : +1-203-(4391000...4391999) Dialling Instructions For trunk calls: 0 203 4390000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 4390000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4390000 ~ 4390999 (Count: 1,000) Example: +1-203-4390000 / 0111-203-4390000 (1203-4390000 / 1-203-4390000) +1-203-4390001 / 0111-203-4390001 (1203-4390001 / 1-203-4390001) +1-203-4390002 / 0111-203-4390002 (1203-4390002 / 1-203-4390002) +1-203-4390003 / 0111-203-4390003 (1203-4390003 / 1-203-4390003) +1-203-4390004 / 0111-203-4390004 (1203-4390004 / 1-203-4390004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-4390995 / 0111-203-4390995 (1203-4390995 / 1-203-4390995) +1-203-4390996 / 0111-203-4390996 (1203-4390996 / 1-203-4390996) +1-203-4390997 / 0111-203-4390997 (1203-4390997 / 1-203-4390997) +1-203-4390998 / 0111-203-4390998 (1203-4390998 / 1-203-4390998) +1-203-4390999 / 0111-203-4390999 (1203-4390999 / 1-203-4390999)