Area Code +1-301-(3190000...3199999) 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 : 3190000 Subscriber Number To : 3199999 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-(3189000...3189999) next › : +1-301-(3200000...3209999) Dialling Instructions For trunk calls: 0 301 3190000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 3190000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3190000 ~ 3199999 (Count: 10,000) Example: +1-301-3190000 / 0111-301-3190000 (1301-3190000 / 1-301-3190000) +1-301-3190001 / 0111-301-3190001 (1301-3190001 / 1-301-3190001) +1-301-3190002 / 0111-301-3190002 (1301-3190002 / 1-301-3190002) +1-301-3190003 / 0111-301-3190003 (1301-3190003 / 1-301-3190003) +1-301-3190004 / 0111-301-3190004 (1301-3190004 / 1-301-3190004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-3199995 / 0111-301-3199995 (1301-3199995 / 1-301-3199995) +1-301-3199996 / 0111-301-3199996 (1301-3199996 / 1-301-3199996) +1-301-3199997 / 0111-301-3199997 (1301-3199997 / 1-301-3199997) +1-301-3199998 / 0111-301-3199998 (1301-3199998 / 1-301-3199998) +1-301-3199999 / 0111-301-3199999 (1301-3199999 / 1-301-3199999)