Area Code +1-203-(7583000...7583999) located in Waterbury, 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 : 7583000 Subscriber Number To : 7583999 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 : Waterbury Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 41.5600 Longitude : -73.0500 ‹ previous : +1-203-(7582000...7582999) next › : +1-203-(7584000...7584999) Dialling Instructions For trunk calls: 0 203 7583000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 7583000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7583000 ~ 7583999 (Count: 1,000) Example: +1-203-7583000 / 0111-203-7583000 (1203-7583000 / 1-203-7583000) +1-203-7583001 / 0111-203-7583001 (1203-7583001 / 1-203-7583001) +1-203-7583002 / 0111-203-7583002 (1203-7583002 / 1-203-7583002) +1-203-7583003 / 0111-203-7583003 (1203-7583003 / 1-203-7583003) +1-203-7583004 / 0111-203-7583004 (1203-7583004 / 1-203-7583004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-7583995 / 0111-203-7583995 (1203-7583995 / 1-203-7583995) +1-203-7583996 / 0111-203-7583996 (1203-7583996 / 1-203-7583996) +1-203-7583997 / 0111-203-7583997 (1203-7583997 / 1-203-7583997) +1-203-7583998 / 0111-203-7583998 (1203-7583998 / 1-203-7583998) +1-203-7583999 / 0111-203-7583999 (1203-7583999 / 1-203-7583999)