Area Code +1-301-(5251000...5251999) 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 : 5251000 Subscriber Number To : 5251999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : VERIZON WIRELESS-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 : 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-(5250000...5250999) next › : +1-301-(5252000...5252999) Dialling Instructions For trunk calls: 0 301 5251000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 5251000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5251000 ~ 5251999 (Count: 1,000) Example: +1-301-5251000 / 0111-301-5251000 (1301-5251000 / 1-301-5251000) +1-301-5251001 / 0111-301-5251001 (1301-5251001 / 1-301-5251001) +1-301-5251002 / 0111-301-5251002 (1301-5251002 / 1-301-5251002) +1-301-5251003 / 0111-301-5251003 (1301-5251003 / 1-301-5251003) +1-301-5251004 / 0111-301-5251004 (1301-5251004 / 1-301-5251004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-5251995 / 0111-301-5251995 (1301-5251995 / 1-301-5251995) +1-301-5251996 / 0111-301-5251996 (1301-5251996 / 1-301-5251996) +1-301-5251997 / 0111-301-5251997 (1301-5251997 / 1-301-5251997) +1-301-5251998 / 0111-301-5251998 (1301-5251998 / 1-301-5251998) +1-301-5251999 / 0111-301-5251999 (1301-5251999 / 1-301-5251999)