303 Area Code Prefixes Directory

If you know the complete number you’re looking up, please use the Phone Number Search above. Or to explore prefixes in different coverage areas, please use the tables below.

Qwest Corporation
Carrier

Coverage Area
Counties: Denver, , Douglas, Boulder, Clear Creek, Adams, Larimer, Weld
Cities: Denver, Golden, Aurora, Littleton, Longmont, Hudson, Idaho Springs, Brighton, Sedalia, Keenesburg, Allenspark, Lyons, Fort Lupton

American Messaging (am)
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Contact Paging Of Colorado
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Global Crossing Local Services-co
Carrier

Coverage Area
Counties: Denver, , Adams
Cities: Denver, Aurora, Brighton

N.e. Colorado Cellular
Carrier

Coverage Area
Counties: Denver
Cities: Denver

AT&T; Local
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Convergent Communications
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Comcast Phone Of Colorado
Carrier

Coverage Area
Counties: Denver, Adams
Cities: Denver, Brighton

Xo Colorado
Carrier

Coverage Area
Counties: Denver,
Cities: Denver, Englewood

Elbert County Wireless
Carrier

Coverage Area
Counties: Denver
Cities: Denver

360networks (usa) Inc.
Carrier

Coverage Area
Counties: Denver,
Cities: Denver, Keenesburg

T-mobile Usa
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Cbeyond Communications
Carrier

Coverage Area
Counties: Denver, Weld
Cities: Denver, Fort Lupton

Mcleodusa Telecommunications Services- Co
Carrier

Coverage Area
Counties: Denver, Boulder
Cities: Denver, Longmont

Live Wire Networks
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Level 3 Communications
Carrier

Coverage Area
Counties: , Denver, Adams, Clear Creek
Cities: Hudson, Keenesburg, Aurora, Denver, Brighton, Idaho Springs

Eschelon Telecom Of Colorado
Carrier

Coverage Area
Counties: , Denver
Cities: Aurora, Denver

4dvision
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Strasburg Telephone Co.
Carrier

Coverage Area
Cities: Strasburg

Eastern Slope Rural Telephone Association
Carrier

Coverage Area
Cities: Bennett

Big River Telephone Company - MO
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Communications Unlimited
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Ymax Communications Corp.
Carrier

Coverage Area
Cities: Deer Trail

Bijou Telephone Cooperative Association
Carrier

Coverage Area
Cities: Deer Trail, Byers

Tw Telecom Of Colorado LLC
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Interlink Adv Svc D/b/a Forethought.net
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Roggen Telephone Cooperative Co.
Carrier

Coverage Area
Cities: Roggen

Iloka DBA Newcloud Networks
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Neutral Tandem-colorado
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Pac - West Telecomm
Carrier

Coverage Area
Counties: Denver
Cities: Denver

The 303 area code is located in Denver, Colorado including Aurora, Golden and was originally put into service on February 4th 1994. Find whose number this is.

Recently Reported Numbers

(303) 571-7511Neutral

Wanted Me To Pay Money Saying my Light Bill Would Be Disconnected

(303) 729-0603Unknown

Fake student loan, vacation, cruise, health insurance, hearing aid, Medicare, Social Security disability benefits, medical alert, energy consultant, solar, home security, car insurance or warranty extension, or employment scam call by madarchod criminals phoning from India This is a scam call by criminals phoning from India, trying to steal your credit card number, Social Security number, dat

(303) 576-5615Neutral

Received follow up email after rejecting call:Newcloud Networks.We are platinum partners with Veeam specializing in custom cloud solutions

(303) 800-8479Unknown

Keeps calling and I am on a do not call list

(303) 569-4657Neutral

They just called me from another number, (509) 253-1580.

(303) 648-7216Unknown

Called my unpublished home number.

(303) 731-1244Unknown

Picked up phone and there was silence on the other end.

(303) 656-2003Neutral

Sorry I missed your call.Other sites on the Internet says this is a scumbag scammer. Guess what Scumbag? I blocked your call.

(303) 466-2946Unknown

Wanted to know who owns this number.

(303) 835-8884Unknown

Did not leave a message.

Recently Searched Numbers

No additional information reported for these searched numbers. Received a call from any phone number listed below? Please consider helping the community by reporting your experience.

303-675-7781
Report
Qwest Corporation
303-135-8333
Report
UNKNOWN
303-888-3597
Report
New Cingular Wireless PCS
303-981-2717
Report
Cellco Partnership DBA Verizon Wireless
303-623-1446
Report
Qwest Corporation
303-689-4945
Report
Qwest Corporation
303-536-1413
Report
Qwest Corporation
303-772-4350
Report
Qwest Corporation
303-573-8290
Report
Qwest Corporation
303-723-9260
Report
Teleport Communications America
303-364-4342
Report
Qwest Corporation
303-571-7000
Report
Qwest Corporation
303-176-7657
Report
UNKNOWN
303-755-1039
Report
Qwest Corporation
303-189-6745
Report
UNKNOWN
303-865-2846
Report
Icg Telecom Group
303-155-1538
Report
UNKNOWN
303-104-4519
Report
UNKNOWN
303-732-7418
Report
Qwest Corporation

Most searched numbers

Cell
All TimeThis Month
303-567-6049First seen 2018-02-27303-320-3062First seen 2018-08-21
303-957-1815First seen 2015-04-16303-606-5556First seen 2012-06-21
303-801-8263First seen 2018-01-11303-356-6089First seen 2019-07-18
303-563-1844First seen 2016-02-12303-195-8895First seen 2016-09-13
303-216-6712First seen 2016-09-11303-522-9123First seen 2016-11-11
Landline
All TimeThis Month
303-648-2673First seen 2019-02-04303-299-9130First seen 2016-03-07
303-238-7202First seen 2015-09-28303-774-7910First seen 2011-03-18
303-949-6694First seen 2012-09-12303-429-9596First seen 2017-10-12
303-201-8961First seen 2018-02-23303-549-4951First seen 2020-03-18
303-633-1818First seen 2011-08-01303-128-4394First seen 2012-09-29

Cities With coverage

CITY LIST
Allenspark
Aurora
Bennett
Brighton
Byers
Deer Trail
Denver
Englewood
Fort Lupton
Golden
Hudson
Idaho Springs
Keenesburg
Littleton
Longmont
Louisville
Lyons
Roggen
Sedalia
Strasburg