Area Code +1-301-(3712000...3712999) located in Middletown, 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 : 3712000 Subscriber Number To : 3712999 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 : BANDWIDTH.COM - 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 : Middletown Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 39.4400 Longitude : -77.5400 ‹ previous : +1-301-(3711000...3711999) next › : +1-301-(3713000...3713999) Dialling Instructions For trunk calls: 0 301 3712000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 3712000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 3712000 ~ 3712999 (Count: 1,000) Example: +1-301-3712000 / 0111-301-3712000 (1301-3712000 / 1-301-3712000) +1-301-3712001 / 0111-301-3712001 (1301-3712001 / 1-301-3712001) +1-301-3712002 / 0111-301-3712002 (1301-3712002 / 1-301-3712002) +1-301-3712003 / 0111-301-3712003 (1301-3712003 / 1-301-3712003) +1-301-3712004 / 0111-301-3712004 (1301-3712004 / 1-301-3712004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-3712995 / 0111-301-3712995 (1301-3712995 / 1-301-3712995) +1-301-3712996 / 0111-301-3712996 (1301-3712996 / 1-301-3712996) +1-301-3712997 / 0111-301-3712997 (1301-3712997 / 1-301-3712997) +1-301-3712998 / 0111-301-3712998 (1301-3712998 / 1-301-3712998) +1-301-3712999 / 0111-301-3712999 (1301-3712999 / 1-301-3712999)