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Area Code 303

Browse available prefixes, locations, carriers, and quick path links into deeper phone number pages for this area code. Area-code research is one of the most important parts of reverse phone lookup because it gives visitors a geographic starting point before they inspect a full number.

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200Prefixes Listed
ColoradoLocation
United StatesCountry
303Area Code
Area Code Overview
Area Code303
Primary LocationColorado
CountryUnited States
Prefix Coverage200 listed prefixes
Prefixes in 303
303-200
Aurora
Teleport Communications America Llc - Co
Landline
303-201
Denver
Usa Mobility Wireless Inc.
Wireless
303-202
Denver
Qwest Corporation
Landline
303-203
Denver
American Messaging (am) Inc.
Landline
303-204
Englewood
Cellco Partnership Dba Verizon Wireless - Co
Wireless
303-205
Denver
Qwest Corporation
Landline
303-206
Denver
Usa Mobility Wireless Inc.
Wireless
303-207
Denver
Usa Mobility Wireless Inc.
Wireless
303-208
Denver
Usa Mobility Wireless Inc.
Wireless
303-209
Denver
Mcimetro Access Transmission Services Llc
Landline
303-210
Englewood
Sprint Spectrum L.p.
Wireless
303-212
Englewood
Contact Paging Of Colorado Inc.
Landline
303-213
Denver
Usa Mobility Wireless Inc.
Wireless
303-214
Denver
Mcimetro Access Transmission Services Llc
Landline
303-215
Golden
Qwest Corporation
Landline
303-216
Golden
Qwest Corporation
Landline
303-217
Denver
Mcimetro Access Transmission Services Llc
Landline
303-218
Denver
Mcimetro Access Transmission Services Llc
Landline
303-219
Englewood
Mcimetro Access Transmission Services Llc
Landline
303-220
Englewood
Qwest Corporation
Landline
303-221
Englewood
Qwest Corporation
Landline
303-222
Denver
Mcimetro Access Transmission Services Llc
Landline
303-223
Denver
Global Crossing Local Services Inc.-co
Landline
303-224
Englewood
Qwest Corporation
Landline
303-225
Denver
Global Crossing Local Services Inc.-co
Landline
303-226
Denver
Icg Telecom Group - Co
Landline
303-227
Commerce City
Qwest Corporation
Landline
303-228
Denver
Icg Telecom Group - Co
Landline
303-229
Englewood
Cellco Partnership Dba Verizon Wireless - Co
Wireless
303-230
Denver
Usa Mobility Wireless Inc.
Wireless
303-231
Denver
Qwest Corporation
Landline
303-232
Denver
Qwest Corporation
Landline
303-233
Denver
Qwest Corporation
Landline
303-234
Denver
Qwest Corporation
Landline
303-235
Denver
Qwest Corporation
Landline
303-236
Denver
Qwest Corporation
Landline
303-237
Denver
Qwest Corporation
Landline
303-238
Denver
Qwest Corporation
Landline
303-239
Denver
Qwest Corporation
Landline
303-240
Denver
Usa Mobility Wireless Inc.
Wireless
303-241
Westminster
Cellco Partnership Dba Verizon Wireless - Co
Wireless
303-242
Westminster
Mcimetro Access Transmission Services Llc
Landline
303-243
Fort Morgan
N.e. Colorado Cellular Inc.
Landline
303-244
Denver
Qwest Corporation
Landline
303-245
Boulder
Qwest Corporation
Landline
303-246
Englewood
Sprint Spectrum L.p.
Wireless
303-247
Boulder
Qwest Corporation
Landline
303-248
Aurora
Teleport Communications America Llc - Co
Landline
303-249
Denver
New Cingular Wireless Pcs Llc
Wireless
303-250
Denver
New Cingular Wireless Pcs Llc
Wireless
303-251
Denver
Usa Mobility Wireless Inc.
Wireless
303-252
Denver
Qwest Corporation
Landline
303-253
Aurora
Teleport Communications America Llc - Co
Landline
303-254
Denver
Qwest Corporation
Landline
303-255
Denver
Qwest Corporation
Landline
303-256
Aurora
Teleport Communications America Llc - Co
Landline
303-257
Englewood
Sprint Spectrum L.p.
Wireless
303-258
Nederland
Qwest Corporation
Landline
303-259
Denver
American Messaging (am) Inc.
Landline
303-260
Denver
Qwest Corporation
Landline
303-261
Aurora
Qwest Corporation
Landline
303-262
Denver
At&t Local
Landline
303-263
Westminster
Cellco Partnership Dba Verizon Wireless - Co
Wireless
303-264
Aurora
Teleport Communications America Llc - Co
Landline
303-265
Englewood
Qwest Corporation
Landline
303-266
Denver
Usa Mobility Wireless Inc.
Wireless
303-267
Englewood
Qwest Corporation
Landline
303-268
Englewood
Icg Telecom Group - Co
Landline
303-269
Aurora
Qwest Corporation
Landline
303-270
Denver
Qwest Corporation
Landline
303-271
Golden
Qwest Corporation
Landline
303-272
Broomfield
Qwest Corporation
Landline
303-273
Golden
Qwest Corporation
Landline
303-274
Denver
Qwest Corporation
Landline
303-275
Denver
Qwest Corporation
Landline
303-276
Englewood
Convergent Communications Inc. - Co
Landline
303-277
Golden
Qwest Corporation
Landline
303-278
Golden
Qwest Corporation
Landline
303-279
Golden
Qwest Corporation
Landline
303-280
Denver
Qwest Corporation
Landline
303-281
Denver
Qwest Corporation
Landline
303-282
Denver
Qwest Corporation
Landline
303-283
Aurora
Qwest Corporation
Landline
303-284
Denver
Comcast Phone Of Colorado Llc - Co
Landline
303-285
Denver
Icg Telecom Group - Co
Landline
303-286
Commerce City
Qwest Corporation
Landline
303-287
Commerce City
Qwest Corporation
Landline
303-288
Commerce City
Qwest Corporation
Landline
303-289
Commerce City
Qwest Corporation
Landline
303-290
Englewood
Qwest Corporation
Landline
303-291
Denver
Qwest Corporation
Landline
303-292
Denver
Qwest Corporation
Landline
303-293
Denver
Qwest Corporation
Landline
303-294
Denver
Qwest Corporation
Landline
303-295
Denver
Qwest Corporation
Landline
303-296
Denver
Qwest Corporation
Landline
303-297
Denver
Qwest Corporation
Landline
303-298
Denver
Qwest Corporation
Landline
303-299
Denver
Qwest Corporation
Landline
303-300
Denver
Qwest Corporation
Landline
303-301
Denver
Icg Telecom Group - Co
Landline
303-302
Englewood
Xo Colorado Llc
Landline
303-304
Denver
New Cingular Wireless Pcs Llc
Wireless
303-305
Denver
Mcimetro Access Transmission Services Llc
Landline
303-306
Aurora
Qwest Corporation
Landline
303-307
Denver
Qwest Corporation
Landline
303-308
Denver
Qwest Corporation
Landline
303-309
Denver
Global Crossing Local Services Inc.-co
Landline
303-310
Englewood
Contact Paging Of Colorado Inc.
Landline
303-312
Denver
Qwest Corporation
Landline
303-313
Denver
Qwest Corporation
Landline
303-314
Denver
Qwest Corporation
Landline
303-315
Denver
Qwest Corporation
Landline
303-316
Denver
Qwest Corporation
Landline
303-317
Englewood
Qwest Corporation
Landline
303-318
Denver
Qwest Corporation
Landline
303-319
Denver
Elbert County Wireless Llc
Wireless
303-320
Denver
Qwest Corporation
Landline
303-321
Denver
Qwest Corporation
Landline
303-322
Denver
Qwest Corporation
Landline
303-323
Denver
Mcimetro Access Transmission Services Llc
Landline
303-324
Denver
New Cingular Wireless Pcs Llc
Wireless
303-325
Englewood
Icg Telecom Group - Co
Landline
303-326
Aurora
Qwest Corporation
Landline
303-327
Denver
Icg Telecom Group - Co
Landline
303-328
Denver
Mcimetro Access Transmission Services Llc
Landline
303-329
Denver
Qwest Corporation
Landline
303-330
Denver
360networks (usa) Inc. - Co
Landline
303-331
Denver
Qwest Corporation
Landline
303-332
Denver
T-mobile Usa Inc.
Wireless
303-333
Denver
Qwest Corporation
Landline
303-334
Denver
Mcimetro Access Transmission Services Llc
Landline
303-335
Westminster
Cellco Partnership Dba Verizon Wireless - Co
Wireless
303-336
Denver
Qwest Corporation
Landline
303-337
Aurora
Qwest Corporation
Landline
303-338
Aurora
Qwest Corporation
Landline
303-339
Denver
Cbeyond Communications Llc - Co
Landline
303-340
Aurora
Qwest Corporation
Landline
303-341
Aurora
Qwest Corporation
Landline
303-342
Denver
Qwest Corporation
Landline
303-343
Aurora
Qwest Corporation
Landline
303-344
Aurora
Qwest Corporation
Landline
303-345
Westminster
Icg Telecom Group - Co
Landline
303-346
Littleton
Qwest Corporation
Landline
303-347
Littleton
Qwest Corporation
Landline
303-348
Denver
Qwest Corporation
Landline
303-349
Englewood
Cellco Partnership Dba Verizon Wireless - Co
Wireless
303-350
Denver
New Cingular Wireless Pcs Llc
Wireless
303-351
Englewood
360networks (usa) Inc. - Co
Landline
303-352
Denver
Qwest Corporation
Landline
303-353
Denver
Comcast Phone Of Colorado Llc - Co
Landline
303-354
Denver
Teleport Communications America Llc - Co
Landline
303-355
Denver
Qwest Corporation
Landline
303-356
Englewood
Sprint Spectrum L.p.
Wireless
303-357
Denver
Mcimetro Access Transmission Services Llc
Landline
303-358
Englewood
Cellco Partnership Dba Verizon Wireless - Co
Wireless
303-359
Denver
T-mobile Usa Inc.
Wireless
303-360
Aurora
Qwest Corporation
Landline
303-361
Aurora
Qwest Corporation
Landline
303-362
Aurora
Teleport Communications America Llc - Co
Landline
303-363
Aurora
Qwest Corporation
Landline
303-364
Aurora
Qwest Corporation
Landline
303-365
Aurora
Qwest Corporation
Landline
303-366
Aurora
Qwest Corporation
Landline
303-367
Aurora
Qwest Corporation
Landline
303-368
Aurora
Qwest Corporation
Landline
303-369
Aurora
Qwest Corporation
Landline
303-370
Denver
Qwest Corporation
Landline
303-371
Denver
Qwest Corporation
Landline
303-372
Denver
Qwest Corporation
Landline
303-373
Denver
Qwest Corporation
Landline
303-374
Aurora
Teleport Communications America Llc - Co
Landline
303-375
Denver
Qwest Corporation
Landline
303-376
Denver
Icg Telecom Group - Co
Landline
303-377
Denver
Qwest Corporation
Landline
303-378
Denver
New Cingular Wireless Pcs Llc
Wireless
303-379
Aurora
Teleport Communications America Llc - Co
Landline
303-380
Denver
Qwest Corporation
Landline
303-381
Denver
Icg Telecom Group - Co
Landline
303-382
Denver
Qwest Corporation
Landline
303-383
Denver
Qwest Corporation
Landline
303-384
Golden
Qwest Corporation
Landline
303-385
Denver
Icg Telecom Group - Co
Landline
303-386
Denver
Icg Telecom Group - Co
Landline
303-387
Denver
Mcleodusa Telecommunications Services Inc.- Co
Landline
303-388
Denver
Qwest Corporation
Landline
303-389
Denver
Qwest Corporation
Landline
303-390
Denver
Mcimetro Access Transmission Services Llc
Landline
303-391
Denver
Qwest Corporation
Landline
303-392
Englewood
Contact Paging Of Colorado Inc.
Landline
303-393
Denver
Qwest Corporation
Landline
303-394
Denver
Qwest Corporation
Landline
303-395
Denver
Global Crossing Local Services Inc.-co
Landline
303-396
Denver
Live Wire Networks Inc. - Co
Landline
303-397
Englewood
Qwest Corporation
Landline
303-398
Denver
Qwest Corporation
Landline
303-399
Denver
Qwest Corporation
Landline
303-400
Aurora
Qwest Corporation
Landline
303-401
Boulder
Qwest Corporation
Landline
303-402
Boulder
Qwest Corporation
Landline

Top prefixes in this area code

303-200→303-201→303-202→303-203→303-204→303-205→303-206→303-207→
Why area code pages matter in reverse phone lookup

Area code pages help visitors understand the wider calling region connected to a number. While a full reverse phone lookup page focuses on one specific caller, an area code page shows the bigger picture by grouping prefixes, cities, and carrier patterns under the same first three digits. This makes it easier to spot whether a number appears local, regional, or part of a service area the visitor already recognizes.

For phone directory websites, area code pages also improve browsing. A user can start with a missed call, discover the number's first three digits, and then move into the related area code to see supporting location data and a list of active prefixes. That layered navigation creates a better research experience and gives visitors more confidence when they continue into a specific number page.