Area Code +1-203-(7478000...7478999) 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 : 7478000 Subscriber Number To : 7478999 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 : BANDWIDTH.COM - 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-(7477000...7477999) next › : +1-203-(7479000...7479999) Dialling Instructions For trunk calls: 0 203 7478000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 7478000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7478000 ~ 7478999 (Count: 1,000) Example: +1-203-7478000 / 0111-203-7478000 (1203-7478000 / 1-203-7478000) +1-203-7478001 / 0111-203-7478001 (1203-7478001 / 1-203-7478001) +1-203-7478002 / 0111-203-7478002 (1203-7478002 / 1-203-7478002) +1-203-7478003 / 0111-203-7478003 (1203-7478003 / 1-203-7478003) +1-203-7478004 / 0111-203-7478004 (1203-7478004 / 1-203-7478004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-7478995 / 0111-203-7478995 (1203-7478995 / 1-203-7478995) +1-203-7478996 / 0111-203-7478996 (1203-7478996 / 1-203-7478996) +1-203-7478997 / 0111-203-7478997 (1203-7478997 / 1-203-7478997) +1-203-7478998 / 0111-203-7478998 (1203-7478998 / 1-203-7478998) +1-203-7478999 / 0111-203-7478999 (1203-7478999 / 1-203-7478999)