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Area Code 303
Colorado area code 303 has been in service since 1947. It has 610 landlines and 162 wireless prefixes (exchanges) serviced by 42 carriers. It covers 14 counties, 678 ZIP codes, and 61 cities, including Denver, Aurora, Littleton, Arvada, Boulder, Englewood, Longmont, Broomfield, and Parker.
- State:
- Colorado
- Time Zone:
- Mountain (9:35 am)
Area Code (303) has 775 prefixes
| Prefix | County | City | Company/Carrier | Line Type |
|---|---|---|---|---|
| (303) 110- | Arapahoe | Aurora | Unknown | |
| (303) 123- | Otero | Fowler | Unknown | |
| (303) 200- | Jefferson | Denver | Teleport Communications Gro... | Landline |
| (303) 201- | Boulder | Boulder | Usa Mobility Wireless, Inc. | Cell Phone |
| (303) 202- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 203- | Washington | Akron | American Messaging (am), Inc. | Landline |
| (303) 204- | Jefferson | Littleton | Cellco Partnership Dba Veri... | Cell Phone |
| (303) 205- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 206- | Boulder | Longmont | Usa Mobility Wireless, Inc. | Cell Phone |
| (303) 207- | Jefferson | Littleton | Usa Mobility Wireless, Inc. | Cell Phone |
| (303) 209- | Denver | Denver | Mcimetro Access Transmissio... | Landline |
| (303) 210- | Denver | Denver | Nextel Communications, Inc. | Cell Phone |
| (303) 211- | Denver | Denver | Unknown | |
| (303) 212- | Clear Creek | Idaho Springs | Contact Paging Of Colorado,... | Landline |
| (303) 214- | Arapahoe | Aurora | Mcimetro Access Transmissio... | Landline |
| (303) 215- | Jefferson | Golden | Qwest Corporation | Landline |
| (303) 216- | Jefferson | Golden | Qwest Corporation | Landline |
| (303) 217- | Denver | Denver | Mcimetro Access Transmissio... | Landline |
| (303) 218- | Arapahoe | Englewood | Mcimetro Access Transmissio... | Landline |
| (303) 219- | Adams | Brighton | Mcimetro Access Transmissio... | Landline |
| (303) 220- | Arapahoe | Englewood | Qwest Corporation | Landline |
| (303) 221- | Arapahoe | Englewood | Qwest Corporation | Landline |
| (303) 222- | Denver | Denver | Mcimetro Access Transmissio... | Landline |
| (303) 223- | Denver | Denver | Global Crossing Local Servi... | Landline |
| (303) 224- | Arapahoe | Englewood | Qwest Corporation | Landline |
| (303) 225- | Denver | Denver | Global Crossing Local Servi... | Landline |
| (303) 226- | Denver | Denver | Icg Telecom Group - Co | Landline |
| (303) 227- | Adams | Commerce City | Qwest Corporation | Landline |
| (303) 228- | Arapahoe | Englewood | Icg Telecom Group - Co | Landline |
| (303) 229- | Denver | Denver | Cellco Partnership Dba Veri... | Cell Phone |
| (303) 230- | Denver | Denver | Usa Mobility Wireless, Inc. | Cell Phone |
| (303) 231- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 232- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 233- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 234- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 235- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 236- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 237- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 238- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 239- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 240- | Jefferson | Evergreen | Usa Mobility Wireless, Inc. | Cell Phone |
| (303) 241- | Denver | Denver | Cellco Partnership Dba Veri... | Cell Phone |
| (303) 242- | Denver | Denver | Mcimetro Access Transmissio... | Landline |
| (303) 243- | Denver | Denver | N.e. Colorado Cellular, Inc. | Landline |
| (303) 244- | Denver | Denver | Qwest Corporation | Landline |
| (303) 245- | Boulder | Boulder | Qwest Corporation | Landline |
| (303) 246- | Jefferson | Littleton | Sprint Spectrum L.p. | Cell Phone |
| (303) 247- | Boulder | Boulder | Qwest Corporation | Landline |
| (303) 248- | Jefferson | Denver | Teleport Communications Gro... | Landline |
| (303) 249- | Denver | Denver | New Cingular Wireless Pcs, Llc | Cell Phone |
| (303) 250- | Arapahoe | Aurora | New Cingular Wireless Pcs, Llc | Cell Phone |
| (303) 251- | Douglas | Larkspur | Usa Mobility Wireless, Inc. | Cell Phone |
| (303) 252- | Adams | Denver | Qwest Corporation | Landline |
| (303) 253- | Adams | Denver | Teleport Communications Gro... | Landline |
| (303) 254- | Adams | Denver | Qwest Corporation | Landline |
| (303) 255- | Adams | Denver | Qwest Corporation | Landline |
| (303) 256- | Denver | Denver | Teleport Communications Gro... | Landline |
| (303) 257- | Denver | Denver | Sprint Spectrum L.p. | Cell Phone |
| (303) 258- | Boulder | Nederland | Qwest Corporation | Landline |
| (303) 259- | Arapahoe | Aurora | American Messaging (am), Inc. | Landline |
| (303) 260- | Denver | Denver | Qwest Corporation | Landline |
| (303) 261- | Arapahoe | Watkins | Qwest Corporation | Landline |
| (303) 262- | Denver | Denver | At&t Local | Landline |
| (303) 263- | Jefferson | Littleton | Cellco Partnership Dba Veri... | Cell Phone |
| (303) 264- | Arapahoe | Englewood | Teleport Communications Gro... | Landline |
| (303) 265- | Denver | Denver | Qwest Corporation | Landline |
| (303) 266- | Arapahoe | Englewood | Usa Mobility Wireless, Inc. | Cell Phone |
| (303) 267- | Arapahoe | Englewood | Qwest Corporation | Landline |
| (303) 268- | Arapahoe | Englewood | Icg Telecom Group - Co | Landline |
| (303) 269- | Arapahoe | Aurora | Qwest Corporation | Landline |
| (303) 270- | Denver | Denver | Qwest Corporation | Landline |
| (303) 271- | Jefferson | Golden | Qwest Corporation | Landline |
| (303) 272- | Denver | Denver | Qwest Corporation | Landline |
| (303) 273- | Jefferson | Golden | Qwest Corporation | Landline |
| (303) 274- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 275- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 276- | Arapahoe | Aurora | Convergent Communications,... | Landline |
| (303) 277- | Jefferson | Golden | Qwest Corporation | Landline |
| (303) 278- | Jefferson | Golden | Qwest Corporation | Landline |
| (303) 279- | Jefferson | Golden | Qwest Corporation | Landline |
| (303) 280- | Adams | Denver | Qwest Corporation | Landline |
| (303) 281- | Denver | Denver | Qwest Corporation | Landline |
| (303) 282- | Denver | Denver | Qwest Corporation | Landline |
| (303) 283- | Arapahoe | Aurora | Qwest Corporation | Landline |
| (303) 284- | Denver | Denver | Comcast Phone Of Colorado,... | Landline |
| (303) 285- | Denver | Denver | Icg Telecom Group - Co | Landline |
| (303) 286- | Adams | Commerce City | Qwest Corporation | Landline |
| (303) 287- | Adams | Commerce City | Qwest Corporation | Landline |
| (303) 288- | Adams | Commerce City | Qwest Corporation | Landline |
| (303) 289- | Adams | Commerce City | Qwest Corporation | Landline |
| (303) 290- | Arapahoe | Englewood | Qwest Corporation | Landline |
| (303) 291- | Denver | Denver | Qwest Corporation | Landline |
| (303) 292- | Denver | Denver | Qwest Corporation | Landline |
| (303) 293- | Denver | Denver | Qwest Corporation | Landline |
| (303) 294- | Denver | Denver | Qwest Corporation | Landline |
| (303) 295- | Denver | Denver | Qwest Corporation | Landline |
| (303) 296- | Denver | Denver | Qwest Corporation | Landline |
| (303) 297- | Denver | Denver | Qwest Corporation | Landline |
| (303) 298- | Denver | Denver | Qwest Corporation | Landline |
| (303) 299- | Denver | Denver | Qwest Corporation | Landline |
