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303 Area Code Prefixes Directory

Choose a prefix to view phone numbers and related information

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

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

Contact Paging Of Colorado
Carrier

Coverage Area
Counties: Denver
Cities: Denver

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

Comcast Phone Of Colorado
Carrier

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

Mcleodusa Telecommunications Services- Co
Carrier

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

Live Wire Networks
Carrier

Coverage Area
Counties: Denver
Cities: Denver

Xo Colorado
Carrier

Coverage Area
Counties: Denver,
Cities: Denver, Englewood

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) 219-8898Unknown

DON'T CALL IT. THEY ARE LOOKING FOR ACTIVE NUMBERS...

(303) 732-6425Dangerous

Police officer fund request

(303) 945-4461Unknown

Left a suspicious voicemail saying, "Oh, we must have a bad connection, let me call you right back." They've called multiple times over the last two weeks. 12-19-19.

(303) 921-3785Dangerous

VM robo insurance scam.

(303) 830-0577Neutral

Robocall about my car's extended warranty.

(303) 923-6888Unknown

East metro detox

(303) 434-4810Dangerous

Energy rebate SCAM.

(303) 921-3214Dangerous

VM: robo message credit card interest rate scam.

(303) 997-0821Unknown

I also got a call. No message.

(303) 636-2900Neutral

This was a call from the Kaiser Permanente Highlands Ranch offices about an appointment.

Recently Unidentified numbers

303 area code numbers that might be spam, scams or that people have reported as unidentified callers

303-772-8972Qwest Corporation
303-563-4821Icg Telecom Group
303-991-3925Xo Colorado
303-459-9029Qwest Corporation
303-784-7508Qwest Corporation
303-985-5949Qwest Corporation
303-478-6814New Cingular Wireless PCS
303-486-5989Qwest Corporation
303-185-8720UNKNOWN
303-673-2856Qwest Corporation
303-573-7768Qwest Corporation
303-265-7126Qwest Corporation
303-926-5817Qwest Corporation
303-326-4961Qwest Corporation
303-503-3485Cellco Partnership DBA Verizon Wireless
303-157-2338UNKNOWN
303-887-4940New Cingular Wireless PCS
303-290-4084Qwest Corporation
303-284-6672Comcast Phone Of Colorado

Most searched numbers

Cell
All TimeThis Month
303-175-6365First seen 2019-03-03303-446-7505First seen 2015-02-11
303-247-1515First seen 2015-04-16303-798-9006First seen 2016-07-13
303-881-4297First seen 2013-03-16303-789-1093First seen 2017-04-17
303-862-3491First seen 2010-10-28303-303-2194First seen 2012-10-26
303-340-2425First seen 2012-12-24303-204-8064First seen 2014-12-07
Landline
All TimeThis Month
303-877-5654First seen 2015-02-04303-793-1840First seen 2011-08-01
303-169-9345First seen 2013-11-18303-894-7716First seen 2011-10-15
303-937-6315First seen 2012-07-05303-273-4363First seen 2013-05-15
303-646-2870First seen 2016-08-24303-421-4173First seen 2016-03-22
303-736-9201First seen 2018-01-05303-191-8036First seen 2010-08-05

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