Area Code +1-301-(3487000...3487999) located in Kensington, 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 : 3487000 Subscriber Number To : 3487999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : X (X) Carrier Name : MCI WORLDCOM COMM 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 : Kensington Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 39.0200 Longitude : -77.0800 ‹ previous : +1-301-(3486000...3486999) next › : +1-301-(3489000...3489999) Dialling Instructions For trunk calls: 0 301 3487000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 3487000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3487000 ~ 3487999 (Count: 1,000) Example: +1-301-3487000 / 0111-301-3487000 (1301-3487000 / 1-301-3487000) +1-301-3487001 / 0111-301-3487001 (1301-3487001 / 1-301-3487001) +1-301-3487002 / 0111-301-3487002 (1301-3487002 / 1-301-3487002) +1-301-3487003 / 0111-301-3487003 (1301-3487003 / 1-301-3487003) +1-301-3487004 / 0111-301-3487004 (1301-3487004 / 1-301-3487004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-3487995 / 0111-301-3487995 (1301-3487995 / 1-301-3487995) +1-301-3487996 / 0111-301-3487996 (1301-3487996 / 1-301-3487996) +1-301-3487997 / 0111-301-3487997 (1301-3487997 / 1-301-3487997) +1-301-3487998 / 0111-301-3487998 (1301-3487998 / 1-301-3487998) +1-301-3487999 / 0111-301-3487999 (1301-3487999 / 1-301-3487999)