Area Code +1-203-(7750000...7759999) located in Danbury, 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 : 7750000 Subscriber Number To : 7759999 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 : Danbury Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 41.4000 Longitude : -73.4500 ‹ previous : +1-203-(7748000...7748999) next › : +1-203-(7760000...7769999) Dialling Instructions For trunk calls: 0 203 7750000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 7750000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 7750000 ~ 7759999 (Count: 10,000) Example: +1-203-7750000 / 0111-203-7750000 (1203-7750000 / 1-203-7750000) +1-203-7750001 / 0111-203-7750001 (1203-7750001 / 1-203-7750001) +1-203-7750002 / 0111-203-7750002 (1203-7750002 / 1-203-7750002) +1-203-7750003 / 0111-203-7750003 (1203-7750003 / 1-203-7750003) +1-203-7750004 / 0111-203-7750004 (1203-7750004 / 1-203-7750004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-7759995 / 0111-203-7759995 (1203-7759995 / 1-203-7759995) +1-203-7759996 / 0111-203-7759996 (1203-7759996 / 1-203-7759996) +1-203-7759997 / 0111-203-7759997 (1203-7759997 / 1-203-7759997) +1-203-7759998 / 0111-203-7759998 (1203-7759998 / 1-203-7759998) +1-203-7759999 / 0111-203-7759999 (1203-7759999 / 1-203-7759999)