Area Code +1-301-(5250000...5250999) 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 : 5250000 Subscriber Number To : 5250999 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 : QUANTUM TELECOM 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-(5240000...5249999) next › : +1-301-(5251000...5251999) Dialling Instructions For trunk calls: 0 301 5250000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 5250000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5250000 ~ 5250999 (Count: 1,000) Example: +1-301-5250000 / 0111-301-5250000 (1301-5250000 / 1-301-5250000) +1-301-5250001 / 0111-301-5250001 (1301-5250001 / 1-301-5250001) +1-301-5250002 / 0111-301-5250002 (1301-5250002 / 1-301-5250002) +1-301-5250003 / 0111-301-5250003 (1301-5250003 / 1-301-5250003) +1-301-5250004 / 0111-301-5250004 (1301-5250004 / 1-301-5250004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-5250995 / 0111-301-5250995 (1301-5250995 / 1-301-5250995) +1-301-5250996 / 0111-301-5250996 (1301-5250996 / 1-301-5250996) +1-301-5250997 / 0111-301-5250997 (1301-5250997 / 1-301-5250997) +1-301-5250998 / 0111-301-5250998 (1301-5250998 / 1-301-5250998) +1-301-5250999 / 0111-301-5250999 (1301-5250999 / 1-301-5250999)