Area Code +1-240-(3392000...3392999) located in Upper Marlboro, Maryland (MD), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 240 Subscriber Number From : 3392000 Subscriber Number To : 3392999 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 : CBEYOND COMMS - MD 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 : MD Region Name : Maryland City : Upper Marlboro Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 38.8200 Longitude : -76.7500 ‹ previous : +1-240-(3391000...3391999) next › : +1-240-(3393000...3393999) Dialling Instructions For trunk calls: 0 240 3392000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 240 3392000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3392000 ~ 3392999 (Count: 1,000) Example: +1-240-3392000 / 0111-240-3392000 (1240-3392000 / 1-240-3392000) +1-240-3392001 / 0111-240-3392001 (1240-3392001 / 1-240-3392001) +1-240-3392002 / 0111-240-3392002 (1240-3392002 / 1-240-3392002) +1-240-3392003 / 0111-240-3392003 (1240-3392003 / 1-240-3392003) +1-240-3392004 / 0111-240-3392004 (1240-3392004 / 1-240-3392004) ...+1-240-xxxxxxx / 0111-240-xxxxxxx (1240-xxxxxxx / 1-240-xxxxxxx) ...+1-240-3392995 / 0111-240-3392995 (1240-3392995 / 1-240-3392995) +1-240-3392996 / 0111-240-3392996 (1240-3392996 / 1-240-3392996) +1-240-3392997 / 0111-240-3392997 (1240-3392997 / 1-240-3392997) +1-240-3392998 / 0111-240-3392998 (1240-3392998 / 1-240-3392998) +1-240-3392999 / 0111-240-3392999 (1240-3392999 / 1-240-3392999)