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(303)
Enter 7-digit phone number for area code 303 or the complete 10-digit phone number

Phone Prefixes for Area Code 303

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Area code location Company / Service Provider
303-200 DENVER, CO TELEPORT COMMUNICATIONS AMERICA, LLC - CO
303-201 DENVER, CO USA MOBILITY WIRELESS, INC.
303-202 DENVER, CO QWEST CORPORATION
303-203 DENVER, CO AMERICAN MESSAGING SERVICES, LLC
303-204 DENVER, CO CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO
303-205 DENVER, CO QWEST CORPORATION
303-206 DENVER, CO USA MOBILITY WIRELESS, INC.
303-207 DENVER, CO USA MOBILITY WIRELESS, INC.
303-208 DENVER, CO USA MOBILITY WIRELESS, INC.
303-209 DENVER, CO MCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-210 DENVER, CO SPRINT SPECTRUM L.P.
303-212 DENVER, CO CONTACT PAGING OF COLORADO, INC.
303-213 DENVER, CO USA MOBILITY WIRELESS, INC.
303-214 DENVER, CO MCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-215 DENVER, CO QWEST CORPORATION
303-216 DENVER, CO QWEST CORPORATION
303-217 DENVER, CO MCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-218 DENVER, CO MCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-219 BRIGHTON, CO MCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-220 DENVER, CO QWEST CORPORATION
303-221 DENVER, CO QWEST CORPORATION
303-222 DENVER, CO MCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-223 DENVER, CO GLOBAL CROSSING LOCAL SERVICES, INC.-CO
303-224 DENVER, CO QWEST CORPORATION
303-225 DENVER, CO GLOBAL CROSSING LOCAL SERVICES, INC.-CO
303-226 DENVER, CO ICG TELECOM GROUP - CO
303-227 DENVER, CO QWEST CORPORATION
303-228 DENVER, CO ICG TELECOM GROUP - CO
303-229 DENVER, CO CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO
303-230 DENVER, CO USA MOBILITY WIRELESS, INC.
303-231 DENVER, CO QWEST CORPORATION
303-232 DENVER, CO QWEST CORPORATION
303-233 DENVER, CO QWEST CORPORATION
303-234 DENVER, CO QWEST CORPORATION
303-235 DENVER, CO QWEST CORPORATION
303-236 DENVER, CO QWEST CORPORATION
303-237 DENVER, CO QWEST CORPORATION
303-238 DENVER, CO QWEST CORPORATION
303-239 DENVER, CO QWEST CORPORATION
303-240 DENVER, CO USA MOBILITY WIRELESS, INC.
303-241 DENVER, CO CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO
303-242 DENVER, CO MCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-243 DENVER, CO N.E. COLORADO CELLULAR, INC.
303-244 DENVER, CO QWEST CORPORATION
303-245 DENVER, CO QWEST CORPORATION
303-246 DENVER, CO SPRINT SPECTRUM L.P.
303-247 DENVER, CO QWEST CORPORATION
303-248 DENVER, CO TELEPORT COMMUNICATIONS AMERICA, LLC - CO
303-249 DENVER, CO NEW CINGULAR WIRELESS PCS, LLC
303-250 DENVER, CO NEW CINGULAR WIRELESS PCS, LLC
303 Area Code Information
Type of code: General Purpose Code
location: CO - US
Time zone: M
Assigned for use: Yes
Code in service: Yes
Service date: January 01, 1947
In jeopardy: No
Relief in progress: No
NPA Relief status:
Code assignable: Yes
Geographic or
non-geographic:
G
Reserved for future use: No
Planning letter(s):
Overlay code: Yes
Overlay complex: 303/720
Dialing plan Standard Permissive
Home local calls: 10D 1+10D
Foreign local calls: 10D 1+10D
Home toll calls: 1+10D NA
Foreign toll calls: 1+10D -

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