Area Code +1-203-(7550000...7559999) 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 : 7550000 Subscriber Number To : 7559999 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-(7540000...7549999) next › : +1-203-(7560000...7569999) Dialling Instructions For trunk calls: 0 203 7550000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 7550000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7550000 ~ 7559999 (Count: 10,000) Example: +1-203-7550000 / 0111-203-7550000 (1203-7550000 / 1-203-7550000) +1-203-7550001 / 0111-203-7550001 (1203-7550001 / 1-203-7550001) +1-203-7550002 / 0111-203-7550002 (1203-7550002 / 1-203-7550002) +1-203-7550003 / 0111-203-7550003 (1203-7550003 / 1-203-7550003) +1-203-7550004 / 0111-203-7550004 (1203-7550004 / 1-203-7550004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-7559995 / 0111-203-7559995 (1203-7559995 / 1-203-7559995) +1-203-7559996 / 0111-203-7559996 (1203-7559996 / 1-203-7559996) +1-203-7559997 / 0111-203-7559997 (1203-7559997 / 1-203-7559997) +1-203-7559998 / 0111-203-7559998 (1203-7559998 / 1-203-7559998) +1-203-7559999 / 0111-203-7559999 (1203-7559999 / 1-203-7559999)