Area Code +1-203-(7580000...7580999) 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 : 7580000 Subscriber Number To : 7580999 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-(7570000...7579999) next › : +1-203-(7581000...7581999) Dialling Instructions For trunk calls: 0 203 7580000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 7580000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7580000 ~ 7580999 (Count: 1,000) Example: +1-203-7580000 / 0111-203-7580000 (1203-7580000 / 1-203-7580000) +1-203-7580001 / 0111-203-7580001 (1203-7580001 / 1-203-7580001) +1-203-7580002 / 0111-203-7580002 (1203-7580002 / 1-203-7580002) +1-203-7580003 / 0111-203-7580003 (1203-7580003 / 1-203-7580003) +1-203-7580004 / 0111-203-7580004 (1203-7580004 / 1-203-7580004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-7580995 / 0111-203-7580995 (1203-7580995 / 1-203-7580995) +1-203-7580996 / 0111-203-7580996 (1203-7580996 / 1-203-7580996) +1-203-7580997 / 0111-203-7580997 (1203-7580997 / 1-203-7580997) +1-203-7580998 / 0111-203-7580998 (1203-7580998 / 1-203-7580998) +1-203-7580999 / 0111-203-7580999 (1203-7580999 / 1-203-7580999)