Area Code +1-301-(2780000...2780999) located in Capitol Heights, 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 : 2780000 Subscriber Number To : 2780999 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 : Capitol Heights Timezone : America/New_York Coordinated Universal Time : -05:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 38.8800 Longitude : -76.9200 ‹ previous : +1-301-(2770000...2779999) next › : +1-301-(2781000...2781999) Dialling Instructions For trunk calls: 0 301 2780000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 301 2780000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2780000 ~ 2780999 (Count: 1,000) Example: +1-301-2780000 / 0111-301-2780000 (1301-2780000 / 1-301-2780000) +1-301-2780001 / 0111-301-2780001 (1301-2780001 / 1-301-2780001) +1-301-2780002 / 0111-301-2780002 (1301-2780002 / 1-301-2780002) +1-301-2780003 / 0111-301-2780003 (1301-2780003 / 1-301-2780003) +1-301-2780004 / 0111-301-2780004 (1301-2780004 / 1-301-2780004) ...+1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx) ...+1-301-2780995 / 0111-301-2780995 (1301-2780995 / 1-301-2780995) +1-301-2780996 / 0111-301-2780996 (1301-2780996 / 1-301-2780996) +1-301-2780997 / 0111-301-2780997 (1301-2780997 / 1-301-2780997) +1-301-2780998 / 0111-301-2780998 (1301-2780998 / 1-301-2780998) +1-301-2780999 / 0111-301-2780999 (1301-2780999 / 1-301-2780999)