Area Code 720-300 : Area Code 720-399

VerifyPhone.com is your one-stop site for area code lookup, phone number lookup, and free phone number reviews. Following is reverse lookup detail & reviews for area code 720 3xx including 720 area code location map. Major cities such as Denver, Centennial, Englewood, Westminster, Aurora covered within area code 720 3xx are also listed on this page. More area codes, including those outside of Colorado, United States of America, are on the VerifyPhone.com homepage.

Reverse Lookup Detail for Area Code 720 3xx

Area code 720 covers part of Coloradostate, covering most of Denver, Arapahoe, Boulder, Weld, Clear Creek counties. It was started on Jan 01, 2000. This region follows US/Mountain + Daylight Savings timezone. Other popular area codes that belong to Colorado state include 303, 719, 970.

Verified changes in Area Code 720 3XX

Date ChangedChange Details
Jun 13, 2014Area code 303 subscribers are now overlayed with area code 720. Subscriber area code 720-328 was assigned on Oct 20, 2009 and is operational from Jun 13, 2014.
Jun 13, 2014Area code 303 subscribers are now overlayed with area code 720. Subscriber area code 720-324 is operational from Jun 13, 2014.
Jun 13, 2014Area code 303 subscribers are now overlayed with area code 720. Subscriber area code 720-353 was assigned on Feb 20, 2008 and is operational from Jun 13, 2014.
Jun 13, 2014Area code 303 subscribers are now overlayed with area code 720. Subscriber area code 720-350 was assigned on Feb 20, 2008 and is operational from Jun 13, 2014.
Jun 13, 2014Area code 303 subscribers are now overlayed with area code 720. Subscriber area code 720-340 was assigned on Mar 22, 2010 and is operational from Jun 13, 2014.
Jun 13, 2014Area code 303 subscribers are now overlayed with area code 720. Subscriber area code 720-379 was assigned on Nov 30, 2006 and is operational from Jun 13, 2014.

Area Code 720-300 - Area Code 720-399 (Covers 720 3xx xxxx phone numbers)

Area CodeCityCountyPopulationNetwork Operator
720-300-0CentennialDenver600,158Sprint Spectrum LP
720-300-8DenverDenver600,158T-Mobile USA Inc
720-301CentennialDenver600,158Sprint Spectrum LP
720-302-0AuroraDenver600,158Teleport Communications America LLC - CO
720-302-3DenverDenver600,158New Cingular Wireless PCS LLC
720-304-0BoulderDenver600,158Qwest Corporation
720-304-5DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-305-0AuroraDenver600,158tw telecom of colorado llc - CO
720-305-5DenverDenver600,158McLeodUSA Telecommunication Services Inc - CO
720-305-3DenverDenver600,158T-Mobile USA Inc
720-305-9HendersonDenver600,158360networks (USA) Inc - CO
720-305-8WestminsterDenver600,158Cellco Partnership dba Verizon Wireless - CO
720-306-9DenverArapahoe572,003Bandwidth.com CLEC LLC - CO
720-306-0DenverArapahoe572,003Eschelon Telecom of Colorado Inc - CO
720-306-8DenverArapahoe572,003Level 3 Communications LLC - CO
720-306-5EnglewoodArapahoe572,003XO Colorado LLC
720-306-7HendersonArapahoe572,003360networks (USA) Inc - CO
720-307-3CentennialBoulder294,567Broadvox-CLEC LLC - CO
720-307-0DenverBoulder294,567AT&T Local
720-307-5DenverBoulder294,567Bandwidth.com CLEC LLC - CO
720-307-2HendersonBoulder294,567360networks (USA) Inc - CO
720-308DenverDenver600,158New Cingular Wireless PCS LLC
720-309DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-310-0AuroraBoulder294,567Teleport Communications America LLC - CO
720-310-8DenverBoulder294,567Bandwidth.com CLEC LLC - CO
720-310-9DenverBoulder294,567Global Crossing Local Services Inc - CO
720-310-2DenverBoulder294,567Level 3 Communications LLC - CO
720-310-1DenverBoulder294,567Pac-West Telecomm Inc - CO
720-310-7HendersonBoulder294,567360networks (USA) Inc - CO
720-311815,313Non Emergency Police And Other Governmental Services
720-312CentennialDenver600,158Sprint Spectrum LP
720-313CentennialDenver600,158Sprint Spectrum LP
720-314-0CentennialDenver600,158Sprint Spectrum LP
720-314-8DenverDenver600,158Bandwidth.com CLEC LLC - CO
720-315-9EnglewoodDenver600,158Cellco Partnership dba Verizon Wireless - CO
720-315-0HendersonDenver600,158360networks (USA) Inc - CO
720-316-0DenverDenver600,158Bandwidth.com CLEC LLC - CO
720-317-0CentennialDenver600,158Sprint Spectrum LP
720-317-2DenverDenver600,158Eschelon Telecom of Colorado Inc - CO
720-317-8DenverDenver600,158T-Mobile USA Inc
720-318-0CentennialDenver600,158Sprint Spectrum LP
720-318-0DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-318-3DenverDenver600,158T-Mobile USA Inc
720-319-0CentennialDenver600,158Sprint Spectrum LP
720-319-8DenverDenver600,158Bandwidth.com CLEC LLC - CO
720-320DenverDenver600,158New Cingular Wireless PCS LLC
720-321-0LakewoodDenver600,158Qwest Corporation
720-322-0Commerce CityDenver600,158Qwest Corporation
720-322-6DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-323DenverDenver600,158T-Mobile USA Inc
720-324-0DenverArapahoe572,003Comcast Phone of Colorado LLC - CO
720-324-7DenverArapahoe572,003Level 3 Communications LLC - CO
720-324-2DenverArapahoe572,003McLeodUSA Telecommunication Services Inc - CO
720-324-6DenverArapahoe572,003T-Mobile USA Inc
720-324-5EnglewoodArapahoe572,003XO Colorado LLC
720-324-9WestminsterArapahoe572,003Cellco Partnership dba Verizon Wireless - CO
720-325-5DenverArapahoe572,003Bandwidth.com CLEC LLC - CO
720-325-2DenverArapahoe572,003Level 3 Communications LLC - CO
720-325-0DenverArapahoe572,003T-Mobile USA Inc
720-325-4WestminsterArapahoe572,003Cellco Partnership dba Verizon Wireless - CO
720-326-0DenverDenver600,158New Cingular Wireless PCS LLC
720-326-3WestminsterDenver600,158Cellco Partnership dba Verizon Wireless - CO
720-327DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-328-0DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-328-7HendersonDenver600,158360networks (USA) Inc - CO
720-329DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-330-9DenverDenver600,158Level 3 Communications LLC - CO
720-330-7EnglewoodDenver600,158XO Colorado LLC
720-330-0Greenwood VillageDenver600,158ICG Telecom Group Inc - CO
720-331CentennialDenver600,158Sprint Spectrum LP
720-332DenverDenver600,158MCImetro Access Transmission Services LLC
720-333CentennialDenver600,158Sprint Spectrum LP
720-334-0CentennialDenver600,158Sprint Spectrum LP
720-334-8DenverDenver600,158Bandwidth.com CLEC LLC - CO
720-335-0CentennialDenver600,158Sprint Spectrum LP
720-335-5DenverDenver600,158Bandwidth.com CLEC LLC - CO
720-335-6DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-335-8DenverDenver600,158T-Mobile USA Inc
720-336-0DenverWeld252,825Bandwidth.com CLEC LLC - CO
720-336-6DenverWeld252,825Global Crossing Local Services Inc - CO
720-336-7DenverWeld252,825Level 3 Communications LLC - CO
720-337-0DenverDenver600,158Qwest Corporation
720-338DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-339-0CentennialDenver600,158Sprint Spectrum LP
720-339-2EnglewoodDenver600,158YMax Communications Corporation - CO
720-340-8DenverBoulder294,567Bandwidth.com CLEC LLC - CO
720-340-4DenverBoulder294,567Comcast Phone of Colorado LLC - CO
720-340-0WestminsterBoulder294,567Cellco Partnership dba Verizon Wireless - CO
720-341DenverDenver600,158T-Mobile USA Inc
720-342-0DenverDenver600,158AT&T Local
720-343-5DenverArapahoe572,003Cbeyond Communications LLC - CO
720-343-0DenverArapahoe572,003Level 3 Communications LLC - CO
720-343-9DenverArapahoe572,003T-Mobile USA Inc
720-344LittletonDenver600,158Qwest Corporation
720-345-9DenverDenver600,158T-Mobile USA Inc
720-345-0DenverDenver600,158ZippyTech Incorporated
720-345-6EnglewoodDenver600,158Qwest Corporation
720-346-8DenverDenver600,158New Cingular Wireless PCS LLC
720-346-9EnglewoodDenver600,158YMax Communications Corporation - CO
720-346-0WestminsterDenver600,158Cellco Partnership dba Verizon Wireless - CO
720-347-0AuroraDenver600,158tw telecom of colorado llc - CO
720-348DenverDenver600,158Qwest Corporation
720-349-0DenverDenver600,158AT&T Local
720-350-0CentennialDenver600,158Sprint Spectrum LP
720-351-0CentennialDenver600,158Sprint Spectrum LP
720-352DenverDenver600,158T-Mobile USA Inc
720-353-0CentennialDenver600,158Sprint Spectrum LP
720-354-0AuroraDenver600,158tw telecom of colorado llc - CO
720-354-7EnglewoodDenver600,158Cellco Partnership dba Verizon Wireless - CO
720-355-9CentennialDenver600,158Sprint Spectrum LP
720-356-0DenverDenver600,158AT&T Local
720-356-2DenverDenver600,158T-Mobile USA Inc
720-357-8CentennialDenver600,158Sprint Spectrum LP
720-358-1DenverWeld252,825Bandwidth.com CLEC LLC - CO
720-358-8DenverWeld252,825Pac-West Telecomm Inc - CO
720-359DenverDenver600,158Qwest Corporation
720-360-1CentennialDenver600,158Broadvox-CLEC LLC - CO
720-360-3DenverDenver600,158McLeodUSA Telecommunication Services Inc - CO
720-361-2DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-361-9DenverDenver600,158New Cingular Wireless PCS LLC
720-362-0DenverDenver600,158New Cingular Wireless PCS LLC
720-362-9DenverDenver600,158T-Mobile USA Inc
720-363-0CentennialDenver600,158Sprint Spectrum LP
720-364DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-365DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-366DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-367-0EnglewoodArapahoe572,003XO Colorado LLC
720-368-0EnglewoodArapahoe572,003XO Colorado LLC
720-369-0DenverDenver600,158New Cingular Wireless PCS LLC
720-370-0DenverDenver600,158Bandwidth.com CLEC LLC - CO
720-371CentennialDenver600,158Sprint Spectrum LP
720-372-5AuroraArapahoe572,003tw telecom of colorado llc - CO
720-372-7DenverArapahoe572,003Comcast Phone of Colorado LLC - CO
720-373CentennialDenver600,158Sprint Spectrum LP
720-374DenverDenver600,158Qwest Corporation
720-375-0Castle RockDenver600,158Commnet Wireless LLC
720-375-6DenverDenver600,158New Cingular Wireless PCS LLC
720-376-0DenverDenver600,158Eschelon Telecom of Colorado Inc - CO
720-377-1CentennialDenver600,158Allegiance Telecom of Colorado Inc
720-377-0EnglewoodDenver600,158XO Colorado LLC
720-378-8DenverBoulder294,567Bandwidth.com CLEC LLC - CO
720-378-9EnglewoodBoulder294,567XO Colorado LLC
720-379-8DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-379-9DenverDenver600,158Level 3 Communications LLC - CO
720-380-0CentennialDenver600,158Sprint Spectrum LP
720-381-0DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-381-9DenverDenver600,158T-Mobile USA Inc
720-382-0DenverDenver600,158Eschelon Telecom of Colorado Inc - CO
720-383-7DenverWeld252,825Bandwidth.com CLEC LLC - CO
720-383-8DenverWeld252,825New Cingular Wireless PCS LLC
720-384-9DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-384-7WestminsterDenver600,158Cellco Partnership dba Verizon Wireless - CO
720-385-9DenverDenver600,158Leap Wireless International Inc dba Cricket Communications Inc
720-386-4CentennialClear Creek9,088Broadvox-CLEC LLC - CO
720-386-9DenverClear Creek9,088Peerless Network of Colorado LLC - CO
720-387-0AuroraDenver600,158tw telecom of colorado llc - CO
720-387-8DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-388-8DenverArapahoe572,003Bandwidth.com CLEC LLC - CO
720-388-7HendersonArapahoe572,003360networks (USA) Inc - CO
720-389-9DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-390-7DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-390-9WestminsterDenver600,158Cellco Partnership dba Verizon Wireless - CO
720-391-9DenverDenver600,158New Cingular Wireless PCS LLC
720-392-0EnglewoodArapahoe572,003YMax Communications Corporation - CO
720-393-0AuroraDenver600,158tw telecom of colorado llc - CO
720-394DenverDenver600,158T-Mobile USA Inc
720-395-0DenverDenver600,158AT&T Local
720-396-0DenverDenver600,158AT&T Local
720-397-0DenverDenver600,158AT&T Local
720-398-9DenverDenver600,158Comcast Phone of Colorado LLC - CO
720-398-6DenverDenver600,158Level 3 Communications LLC - CO
720-399-9DenverDenver600,158Bandwidth.com CLEC LLC - CO
 

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720 Area Code

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720 Area Code Reviews

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Telephone Area Codes in Colorado

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External links & resources for area code 720 in Colorado

  • CitySites Pages for Colorado (Source: Official CitySites)
  • Wikipedia Article on Area Code 720 (Source: Wikipedia)
  • State Information Resources for Colorado (Source: State Information)