Area Code +1-203-(7540000...7549999) 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 : 7540000 Subscriber Number To : 7549999 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-(7530000...7539999) next › : +1-203-(7550000...7559999) Dialling Instructions For trunk calls: 0 203 7540000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 7540000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7540000 ~ 7549999 (Count: 10,000) Example: +1-203-7540000 / 0111-203-7540000 (1203-7540000 / 1-203-7540000) +1-203-7540001 / 0111-203-7540001 (1203-7540001 / 1-203-7540001) +1-203-7540002 / 0111-203-7540002 (1203-7540002 / 1-203-7540002) +1-203-7540003 / 0111-203-7540003 (1203-7540003 / 1-203-7540003) +1-203-7540004 / 0111-203-7540004 (1203-7540004 / 1-203-7540004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-7549995 / 0111-203-7549995 (1203-7549995 / 1-203-7549995) +1-203-7549996 / 0111-203-7549996 (1203-7549996 / 1-203-7549996) +1-203-7549997 / 0111-203-7549997 (1203-7549997 / 1-203-7549997) +1-203-7549998 / 0111-203-7549998 (1203-7549998 / 1-203-7549998) +1-203-7549999 / 0111-203-7549999 (1203-7549999 / 1-203-7549999)