Area Code +1-203-(4380000...4389999) located in Ridgefield, 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 : 4380000 Subscriber Number To : 4389999 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 : FRONTIER COMM - CT 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 : Ridgefield Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 41.2800 Longitude : -73.5000 ‹ previous : +1-203-(4379000...4379999) next › : +1-203-(4390000...4390999) Dialling Instructions For trunk calls: 0 203 4380000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 4380000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4380000 ~ 4389999 (Count: 10,000) Example: +1-203-4380000 / 0111-203-4380000 (1203-4380000 / 1-203-4380000) +1-203-4380001 / 0111-203-4380001 (1203-4380001 / 1-203-4380001) +1-203-4380002 / 0111-203-4380002 (1203-4380002 / 1-203-4380002) +1-203-4380003 / 0111-203-4380003 (1203-4380003 / 1-203-4380003) +1-203-4380004 / 0111-203-4380004 (1203-4380004 / 1-203-4380004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-4389995 / 0111-203-4389995 (1203-4389995 / 1-203-4389995) +1-203-4389996 / 0111-203-4389996 (1203-4389996 / 1-203-4389996) +1-203-4389997 / 0111-203-4389997 (1203-4389997 / 1-203-4389997) +1-203-4389998 / 0111-203-4389998 (1203-4389998 / 1-203-4389998) +1-203-4389999 / 0111-203-4389999 (1203-4389999 / 1-203-4389999)