Area Code +1-203-(4099000...4099999) located in Old Greenwich, 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 : 4099000 Subscriber Number To : 4099999 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 : GLOBAL CROSSING-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 : Old Greenwich Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 41.0200 Longitude : -73.5600 ‹ previous : +1-203-(4098000...4098999) next › : +1-203-(4100000...4109999) Dialling Instructions For trunk calls: 0 203 4099000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 4099000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 4099000 ~ 4099999 (Count: 1,000) Example: +1-203-4099000 / 0111-203-4099000 (1203-4099000 / 1-203-4099000) +1-203-4099001 / 0111-203-4099001 (1203-4099001 / 1-203-4099001) +1-203-4099002 / 0111-203-4099002 (1203-4099002 / 1-203-4099002) +1-203-4099003 / 0111-203-4099003 (1203-4099003 / 1-203-4099003) +1-203-4099004 / 0111-203-4099004 (1203-4099004 / 1-203-4099004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-4099995 / 0111-203-4099995 (1203-4099995 / 1-203-4099995) +1-203-4099996 / 0111-203-4099996 (1203-4099996 / 1-203-4099996) +1-203-4099997 / 0111-203-4099997 (1203-4099997 / 1-203-4099997) +1-203-4099998 / 0111-203-4099998 (1203-4099998 / 1-203-4099998) +1-203-4099999 / 0111-203-4099999 (1203-4099999 / 1-203-4099999)