Area Code +1-203-(7710000...7719999) 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 : 7710000 Subscriber Number To : 7719999 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 : 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-(7700000...7709999) next › : +1-203-(7720000...7720999) Dialling Instructions For trunk calls: 0 203 7710000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 7710000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7710000 ~ 7719999 (Count: 10,000) Example: +1-203-7710000 / 0111-203-7710000 (1203-7710000 / 1-203-7710000) +1-203-7710001 / 0111-203-7710001 (1203-7710001 / 1-203-7710001) +1-203-7710002 / 0111-203-7710002 (1203-7710002 / 1-203-7710002) +1-203-7710003 / 0111-203-7710003 (1203-7710003 / 1-203-7710003) +1-203-7710004 / 0111-203-7710004 (1203-7710004 / 1-203-7710004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-7719995 / 0111-203-7719995 (1203-7719995 / 1-203-7719995) +1-203-7719996 / 0111-203-7719996 (1203-7719996 / 1-203-7719996) +1-203-7719997 / 0111-203-7719997 (1203-7719997 / 1-203-7719997) +1-203-7719998 / 0111-203-7719998 (1203-7719998 / 1-203-7719998) +1-203-7719999 / 0111-203-7719999 (1203-7719999 / 1-203-7719999)