Area Code +1-203-(2858000...2858999) 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 : 2858000 Subscriber Number To : 2858999 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 : LEVEL 3 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-(2857000...2857999) next › : +1-203-(2859000...2859999) Dialling Instructions For trunk calls: 0 203 2858000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 203 2858000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2858000 ~ 2858999 (Count: 1,000) Example: +1-203-2858000 / 0111-203-2858000 (1203-2858000 / 1-203-2858000) +1-203-2858001 / 0111-203-2858001 (1203-2858001 / 1-203-2858001) +1-203-2858002 / 0111-203-2858002 (1203-2858002 / 1-203-2858002) +1-203-2858003 / 0111-203-2858003 (1203-2858003 / 1-203-2858003) +1-203-2858004 / 0111-203-2858004 (1203-2858004 / 1-203-2858004) ...+1-203-xxxxxxx / 0111-203-xxxxxxx (1203-xxxxxxx / 1-203-xxxxxxx) ...+1-203-2858995 / 0111-203-2858995 (1203-2858995 / 1-203-2858995) +1-203-2858996 / 0111-203-2858996 (1203-2858996 / 1-203-2858996) +1-203-2858997 / 0111-203-2858997 (1203-2858997 / 1-203-2858997) +1-203-2858998 / 0111-203-2858998 (1203-2858998 / 1-203-2858998) +1-203-2858999 / 0111-203-2858999 (1203-2858999 / 1-203-2858999)