Area Code +1-203-(4045000...4045999) located in New Haven, 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 : 4045000 Subscriber Number To : 4045999 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 : BROADWING 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 : New Haven Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 41.3000 Longitude : -72.9300 ‹ previous : +1-203-(4044000...4044999) next › : +1-203-(4046000...4046999) Dialling Instructions For trunk calls: 0 203 4045000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 4045000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4045000 ~ 4045999 (Count: 1,000) Example: +1-203-4045000 / 0111-203-4045000 (1203-4045000 / 1-203-4045000) +1-203-4045001 / 0111-203-4045001 (1203-4045001 / 1-203-4045001) +1-203-4045002 / 0111-203-4045002 (1203-4045002 / 1-203-4045002) +1-203-4045003 / 0111-203-4045003 (1203-4045003 / 1-203-4045003) +1-203-4045004 / 0111-203-4045004 (1203-4045004 / 1-203-4045004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-4045995 / 0111-203-4045995 (1203-4045995 / 1-203-4045995) +1-203-4045996 / 0111-203-4045996 (1203-4045996 / 1-203-4045996) +1-203-4045997 / 0111-203-4045997 (1203-4045997 / 1-203-4045997) +1-203-4045998 / 0111-203-4045998 (1203-4045998 / 1-203-4045998) +1-203-4045999 / 0111-203-4045999 (1203-4045999 / 1-203-4045999)