National Phone Number Registry NPNR

Area Code 303 Location

Area code 303 is currently assigned for use in Colorado since Jan 01, 1947. View all phone prefixes used in area code 303 or other area codes in Colorado.

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

Phone Prefixes for Area Code 303

Page 1 of 16 — Previous   Next
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 -

Home   ·   Area Codes   ·   News & Info
Some useful links:
National Do Not Call Registry FTC - Cell Phones and the Do Not Call Registry FCC - Do Not Call List FTC Complaint Assistant 1.3.86