Area Code +1-720-(2000000...2009999) located in Denver, Colorado (CO), more detail is as below. Place International Dialing Code : 1 International Prefix : 011 National Prefix : 1 National Destination Code : 720 Subscriber Number From : 2000000 Subscriber Number To : 2009999 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 : QWEST CORPORATION 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 : CO Region Name : Colorado City : Denver Timezone : America/Denver Coordinated Universal Time : -07:00 Daylight Saving Time : Yes National Significant Number Minimum Length : 10 Latitude : 39.7400 Longitude : -104.9800 ‹ previous : +1-719-(9999000...9999999) next › : +1-720-(2010000...2019999) Dialling Instructions For trunk calls: 0 720 2000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 011 1 720 2000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 2000000 ~ 2009999 (Count: 10,000) Example: +1-720-2000000 / 0111-720-2000000 (1720-2000000 / 1-720-2000000) +1-720-2000001 / 0111-720-2000001 (1720-2000001 / 1-720-2000001) +1-720-2000002 / 0111-720-2000002 (1720-2000002 / 1-720-2000002) +1-720-2000003 / 0111-720-2000003 (1720-2000003 / 1-720-2000003) +1-720-2000004 / 0111-720-2000004 (1720-2000004 / 1-720-2000004) ...+1-720-xxxxxxx / 0111-720-xxxxxxx (1720-xxxxxxx / 1-720-xxxxxxx) ...+1-720-2009995 / 0111-720-2009995 (1720-2009995 / 1-720-2009995) +1-720-2009996 / 0111-720-2009996 (1720-2009996 / 1-720-2009996) +1-720-2009997 / 0111-720-2009997 (1720-2009997 / 1-720-2009997) +1-720-2009998 / 0111-720-2009998 (1720-2009998 / 1-720-2009998) +1-720-2009999 / 0111-720-2009999 (1720-2009999 / 1-720-2009999)