Area Code 303-800 : Area Code 303-899 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 303 8xx including 303 area code location map. Major cities such as Denver, Aurora, Englewood, Longmont, Lyons covered within area code 303 8xx are also listed on this page. More area codes, including those outside of Colorado, are on the homepage.

Reverse Lookup Detail for Area Code 303 8xx

Area code 303 covers part of Coloradostate, covering most of Jefferson, Denver, Arapahoe, Boulder, Weld counties. It was started on Feb 04, 1994. This region follows (UTC-07:00) timezone. Other popular area codes that belong to Colorado state include 719, 720, 970.

Area Code 303-800 - Area Code 303-899 (Covers 303 8xx xxxx phone numbers)

Area CodeCityCountyPopulationNetwork Operator
303-800DenverJefferson527 802Apollo Communications, Llc - Co
303-801DenverDenver555 803Mcimetro, Ats, Inc.
303-802DenverDenver555 804Mcimetro, Ats, Inc.
303-803DenverJefferson527 805Time Warner Telecom Of Colorado Llc-co
303-804DenverDenver555 806Qwest Corporation
303-805DenverJefferson527 807Qwest Corporation
303-806DenverDenver555 808Qwest Corporation
303-807DenverJefferson527 809At&t Wireless Services, Inc.
303-808DenverJefferson527 810At&t Wireless Services, Inc.
303-809DenverJefferson527 811At&t Wireless Services, Inc.
303-810DenverJefferson527 812At&t Wireless Services, Inc.
303-812DenverDenver555 814Qwest Corporation
303-813DenverDenver555 815Qwest Corporation
303-814DenverJefferson527 816Qwest Corporation
303-816DenverJefferson527 818Qwest Corporation
303-817DenverJefferson527 819Cellco Partnership Dba Verizon Wireless - Co
303-818DenverJefferson527 820Cellco Partnership Dba Verizon Wireless - Co
303-819DenverJefferson527 821Cellco Partnership Dba Verizon Wireless - Co
303-820DenverDenver555 822Qwest Corporation
303-821DenverJefferson527 823Arch Wireless Holdings, Inc.
303-822ByersArapahoe488 824Bijou Telephone Cooperative Association, Inc.
303-823LyonsBoulder291 825Qwest Corporation
303-824DenverArapahoe488 826Teleport Communications Group - Co
303-825DenverDenver555 827Qwest Corporation
303-826DenverJefferson527 828Metrocall
303-827LongmontBoulder291 829Icg Telecom Group - Co
303-828DenverJefferson527 830Qwest Corporation
303-829DenverJefferson527 831Cellco Partnership Dba Verizon Wireless - Co
303-830DenverDenver555 832Qwest Corporation
303-831DenverDenver555 833Qwest Corporation
303-832DenverDenver555 834Qwest Corporation
303-833DenverJefferson527 835Qwest Corporation
303-834AuroraArapahoe488 836Voice Networks, Inc.
303-835BrightonAdams364 837Level 3 Communications, Llc - Co
303-836DenverJefferson527 838Communications Unlimited
303-837DenverDenver555 839Qwest Corporation
303-838DenverJefferson527 840Qwest Corporation
303-839DenverDenver555 841Qwest Corporation
303-840DenverJefferson527 842Qwest Corporation
303-841DenverJefferson527 843Qwest Corporation
303-842DenverDenver555 844Cellco Partnership Dba Verizon Wireless - Co
303-843DenverDenver555 845Qwest Corporation
303-844DenverDenver555 846Qwest Corporation
303-845LongmontBoulder291 847Teleport Communications Group - Co
303-846DenverDenver555 848Qwest Corporation
303-847DenverDenver555 849Level 3 Communications, Llc - Co
303-848LongmontBoulder291 850Icg Telecom Group - Co
303-849RoggenWeld181 851Roggen Telephone Cooperative Co.
303-850DenverDenver555 852Qwest Corporation
303-851DenverJefferson527 853Metrocall
303-852DenverJefferson527 854Arch Wireless Holdings, Inc.
303-853DenverDenver555 855Qwest Corporation
303-854DenverDenver555 856Icg Telecom Group - Co
303-855DenverJefferson527 857Metrocall
303-856EnglewoodArapahoe488 858Icg Telecom Group - Co
303-857Fort LuptonWeld181 859At&t Wireless Services, Inc.
303-858DenverJefferson527 860Qwest Corporation
303-859DenverJefferson527 861Cellco Partnership Dba Verizon Wireless - Co
303-860DenverDenver555 862Qwest Corporation
303-861DenverDenver555 863Qwest Corporation
303-863DenverDenver555 865Qwest Corporation
303-864DenverDenver555 866Qwest Corporation
303-865DenverDenver555 867Icg Telecom Group - Co
303-866DenverDenver555 868Qwest Corporation
303-868DenverJefferson527 870Cellco Partnership Dba Verizon Wireless - Co
303-869DenverDenver555 871Qwest Corporation
303-870DenverJefferson527 872Cellco Partnership Dba Verizon Wireless - Co
303-871DenverDenver555 873Qwest Corporation
303-872DenverDenver555 874Level 3 Communications, Llc - Co
303-873AuroraArapahoe488 875Qwest Corporation
303-874EnglewoodArapahoe488 876Icg Telecom Group - Co
303-875DenverJefferson527 877T-mobile Usa, Inc.
303-876DenverDenver555 878Mcimetro, Ats, Inc.
303-877DenverJefferson527 879Cellco Partnership Dba Verizon Wireless - Co
303-878DenverJefferson527 880Arch Wireless Holdings, Inc.
303-879DenverJefferson527 881Arch Wireless Holdings, Inc.
303-880DenverJefferson527 882Cellco Partnership Dba Verizon Wireless - Co
303-881DenverJefferson527 883At&t Wireless Services, Inc.
303-882DenverJefferson527 884At&t Wireless Services, Inc.
303-883DenverJefferson527 885At&t Wireless Services, Inc.
303-884DenverJefferson527 886At&t Wireless Services, Inc.
303-885DenverJefferson527 887At&t Wireless Services, Inc.
303-886DenverJefferson527 888At&t Wireless Services, Inc.
303-887DenverJefferson527 889At&t Wireless Services, Inc.
303-888DenverJefferson527 890At&t Wireless Services, Inc.
303-889DenverDenver555 891Qwest Corporation
303-890DenverJefferson527 892Metrocall
303-891DenverJefferson527 893Metrocall
303-892DenverDenver555 894Qwest Corporation
303-893DenverDenver555 895Qwest Corporation
303-894DenverDenver555 896Qwest Corporation
303-895DenverDenver555 897Cellco Partnership Dba Verizon Wireless - Co
303-896DenverDenver555 898Qwest Corporation
303-897DenverJefferson527 899Metrocall
303-898DenverJefferson527 900At&t Wireless Services, Inc.
303-899DenverDenver555 901Qwest Corporation


Recent Free Phone Number Reviews in Area Code 303 8xx

Kathy ( commented on 303-829-3729
This review was created at 2014-03-18T23:52
This is a prank caller. Changes his/her voice and says "This is Morgan Freeman" repeatedly. When asked how I can help him/her, the reply is "hoping my voice will make you fall asleep". It wasn"t even funny!
Recent reviews for Area Code 303-829-3
Rkymrr888 ( commented on 303-872-7272
This review was created at 2012-07-18T21:24
This number repeatedly rings me, and if I answer they hang up.  Then when I ring back, I"m given an option to opt out, yet for weeks they continue to call every few hours.  
Recent reviews for Area Code 303-872-7

Map for area code 303 8xx

Loading Map

303 Area Code

At, you'll find current information on 303area code, including 303 area code location & map. Other phone area code may be searched using's area code locator service on the homepage. Use the phone number search function above to instant verify area code lookup & phone number lookup.

Colorado Area Codes Directory provides a free area codes directory with detailed information on the various USA area codes, area codes listing, and other area codes phone details. also lists international area codes within the North American Numbering Plan. And you can verify owners of phone numbers using the reverse number lookup service by entering a 10 digit phone number in the top most text box.

303 Area Code Finder

Find area codes by using's area code finder. provides an area codes location map service for area codes of USA. When using these maps, please note that area zip codes are different than phone number area codes used for calling.

Colorado Area Code Lookup is an excellent resource for area code lookup and reverse number lookup. Here you'll find area codes, city, county, population & operator list table of area codes within the United States. Also, you can verify owners of phone numbers with full name & address information for background check. For a full list of area codes, visit home page. It provides drilldown for USA area codes and area code location maps.

Reverse Phone Number Verification

Find owner information using the reverse phone number search function on With phone number search function, you can find owner information & detailed area codes information in the United States.

Telephone/Landline Area Codes is a resource of North American telephone area codes. Beyond area code listings, relevant information about each area code is detailed. For example, this page details area code 303-8. You can also search area codes by state, and within the NANP, find country area codes.

Free Area Codes Locator for Colorado

The area codes locator shows the coverage area for each phone number area code. Area code locations are also listed by city next to the area code maps on this page. Also, read reviews within an area code.

303 Area Code Reviews provides local reviews for phone numbers and aggregates results per area code. It shows you the area code location covered by each area code; for example, the LA area code reveiws covers local business phone numbers area in Los Angeles. This page details area code 303-8. All USA states area codes may be found using

Telephone Area Codes in Colorado

The telephone area code prefixes local phone numbers & is not required to be dialed. For area codes by city, search Area codes telephone differ from region to region, and in some places the area code must be dialed even when calling locally within that region. Find out more with area code decoder.

External links & resources for area code 303 in Colorado

  • CitySites Pages for Colorado (Source: Official CitySites)
  • Wikipedia Article on Area Code 303 (Source: Wikipedia)
  • State Information Resources for Colorado (Source: State Information)