Area Code +1-301-(5230000...5239999) located in Silver Spring, 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 : 5230000 Subscriber Number To : 5239999 National Destination Code Length : 3 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : M (Mobile, Cellular) Carrier Name : SPRINT SPECTRUM LP 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 : Silver Spring Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 39.0100 Longitude : -77.0400 ‹ previous : +1-301-(5220000...5229999) next › : +1-301-(5240000...5249999) Dialling Instructions For trunk calls: 0 301 5230000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 5230000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 5230000 ~ 5239999 (Count: 10,000) Example: +1-301-5230000 / 0111-301-5230000 (1301-5230000 / 1-301-5230000) +1-301-5230001 / 0111-301-5230001 (1301-5230001 / 1-301-5230001) +1-301-5230002 / 0111-301-5230002 (1301-5230002 / 1-301-5230002) +1-301-5230003 / 0111-301-5230003 (1301-5230003 / 1-301-5230003) +1-301-5230004 / 0111-301-5230004 (1301-5230004 / 1-301-5230004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-5239995 / 0111-301-5239995 (1301-5239995 / 1-301-5239995) +1-301-5239996 / 0111-301-5239996 (1301-5239996 / 1-301-5239996) +1-301-5239997 / 0111-301-5239997 (1301-5239997 / 1-301-5239997) +1-301-5239998 / 0111-301-5239998 (1301-5239998 / 1-301-5239998) +1-301-5239999 / 0111-301-5239999 (1301-5239999 / 1-301-5239999)