Area Code +1-203-(7100000...7109999) 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 : 7100000 Subscriber Number To : 7109999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : NEW CINGULAR WRLS DC 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-(7099000...7099999) next › : +1-203-(7120000...7120999) Dialling Instructions For trunk calls: 0 203 7100000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 7100000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7100000 ~ 7109999 (Count: 10,000) Example: +1-203-7100000 / 0111-203-7100000 (1203-7100000 / 1-203-7100000) +1-203-7100001 / 0111-203-7100001 (1203-7100001 / 1-203-7100001) +1-203-7100002 / 0111-203-7100002 (1203-7100002 / 1-203-7100002) +1-203-7100003 / 0111-203-7100003 (1203-7100003 / 1-203-7100003) +1-203-7100004 / 0111-203-7100004 (1203-7100004 / 1-203-7100004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-7109995 / 0111-203-7109995 (1203-7109995 / 1-203-7109995) +1-203-7109996 / 0111-203-7109996 (1203-7109996 / 1-203-7109996) +1-203-7109997 / 0111-203-7109997 (1203-7109997 / 1-203-7109997) +1-203-7109998 / 0111-203-7109998 (1203-7109998 / 1-203-7109998) +1-203-7109999 / 0111-203-7109999 (1203-7109999 / 1-203-7109999)