Area Code +1-301-(3374000...3374999) located in Gaithersburg, Maryland (MD), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 301 Subscriber Number From : 3374000 Subscriber Number To : 3374999 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 : TELEPORT COMM AM-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 : MD Region Name : Maryland City : Gaithersburg Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 39.1400 Longitude : -77.2000 ‹ previous : +1-301-(3373000...3373999) next › : +1-301-(3375000...3375999) Dialling Instructions For trunk calls: 0 301 3374000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 3374000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3374000 ~ 3374999 (Count: 1,000) Example: +1-301-3374000 / 0111-301-3374000 (1301-3374000 / 1-301-3374000) +1-301-3374001 / 0111-301-3374001 (1301-3374001 / 1-301-3374001) +1-301-3374002 / 0111-301-3374002 (1301-3374002 / 1-301-3374002) +1-301-3374003 / 0111-301-3374003 (1301-3374003 / 1-301-3374003) +1-301-3374004 / 0111-301-3374004 (1301-3374004 / 1-301-3374004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-3374995 / 0111-301-3374995 (1301-3374995 / 1-301-3374995) +1-301-3374996 / 0111-301-3374996 (1301-3374996 / 1-301-3374996) +1-301-3374997 / 0111-301-3374997 (1301-3374997 / 1-301-3374997) +1-301-3374998 / 0111-301-3374998 (1301-3374998 / 1-301-3374998) +1-301-3374999 / 0111-301-3374999 (1301-3374999 / 1-301-3374999)