Area Code +1-301-(3420000...3429999) located in Lexington Park-Great Mills, 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 : 3420000 Subscriber Number To : 3429999 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 : VERIZON MARYLAND INC 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 : Lexington Park-Great Mills Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 38.2400 Longitude : -76.4900 ‹ previous : +1-301-(3410000...3419999) next › : +1-301-(3430000...3439999) Dialling Instructions For trunk calls: 0 301 3420000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 3420000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3420000 ~ 3429999 (Count: 10,000) Example: +1-301-3420000 / 0111-301-3420000 (1301-3420000 / 1-301-3420000) +1-301-3420001 / 0111-301-3420001 (1301-3420001 / 1-301-3420001) +1-301-3420002 / 0111-301-3420002 (1301-3420002 / 1-301-3420002) +1-301-3420003 / 0111-301-3420003 (1301-3420003 / 1-301-3420003) +1-301-3420004 / 0111-301-3420004 (1301-3420004 / 1-301-3420004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-3429995 / 0111-301-3429995 (1301-3429995 / 1-301-3429995) +1-301-3429996 / 0111-301-3429996 (1301-3429996 / 1-301-3429996) +1-301-3429997 / 0111-301-3429997 (1301-3429997 / 1-301-3429997) +1-301-3429998 / 0111-301-3429998 (1301-3429998 / 1-301-3429998) +1-301-3429999 / 0111-301-3429999 (1301-3429999 / 1-301-3429999)