Area Code +1-301-(3470000...3479999) located in Bethesda, 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 : 3470000 Subscriber Number To : 3479999 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 : Bethesda Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 38.9800 Longitude : -77.1100 ‹ previous : +1-301-(3460000...3469999) next › : +1-301-(3480000...3480999) Dialling Instructions For trunk calls: 0 301 3470000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 3470000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3470000 ~ 3479999 (Count: 10,000) Example: +1-301-3470000 / 0111-301-3470000 (1301-3470000 / 1-301-3470000) +1-301-3470001 / 0111-301-3470001 (1301-3470001 / 1-301-3470001) +1-301-3470002 / 0111-301-3470002 (1301-3470002 / 1-301-3470002) +1-301-3470003 / 0111-301-3470003 (1301-3470003 / 1-301-3470003) +1-301-3470004 / 0111-301-3470004 (1301-3470004 / 1-301-3470004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-3479995 / 0111-301-3479995 (1301-3479995 / 1-301-3479995) +1-301-3479996 / 0111-301-3479996 (1301-3479996 / 1-301-3479996) +1-301-3479997 / 0111-301-3479997 (1301-3479997 / 1-301-3479997) +1-301-3479998 / 0111-301-3479998 (1301-3479998 / 1-301-3479998) +1-301-3479999 / 0111-301-3479999 (1301-3479999 / 1-301-3479999)