Area Code 303
Colorado area code 303 has been in service since 1947. It has 633 landlines and 139 wireless prefixes (exchanges) serviced by 43 carriers. It covers 14 counties, 680 ZIP codes, and 75 cities, including Denver, Aurora, Littleton, Lakewood, Arvada, Boulder, Longmont, Centennial, and Broomfield.
- State:
- Colorado
- Time Zone:
- Mountain (8:59 pm)
Area Code (303) has 772 prefixes
| Prefix | County | City | Company/Carrier | Line Type |
|---|---|---|---|---|
| (303) 200- | Jefferson | Denver | Teleport Communications Gro... | Landline |
| (303) 201- | Boulder | Boulder | Metrocall | Landline |
| (303) 202- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 203- | Adams | Denver | American Messaging (am), Inc. | Cell Phone |
| (303) 204- | Jefferson | Bow Mar | Cellco Partnership Dba Veri... | Cell Phone |
| (303) 205- | Jefferson | Denver | Qwest Corporation | Landline |
| (303) 206- | Arapahoe | Centennial | Metrocall | Landline |
| (303) 207- | Jefferson | Bow Mar | Metrocall | Landline |
| (303) 209- | Denver | Denver | Mcimetro, Ats, Inc. | Landline |
| (303) 210- | Denver | Denver | Nextel Communications, Inc. | Cell Phone |
| (303) 212- | Clear Creek | Idaho Springs | Contact Paging Of Colorado,... | Cell Phone |
| (303) 214- | Arapahoe | Aurora | Mcimetro, Ats, Inc. | Landline |
| (303) 215- | Jefferson | Evergreen | Qwest Corporation | Landline |
| (303) 216- | Jefferson | Evergreen | Qwest Corporation | Landline |
| (303) 217- | Denver | Denver | Mcimetro, Ats, Inc. | Landline |
| (303) 218- | Arapahoe | Centennial | Mcimetro, Ats, Inc. | Landline |
| (303) 219- | Adams | Brighton | Mcimetro, Ats, Inc. | Landline |
| (303) 220- | Arapahoe | Centennial | Qwest Corporation | Landline |
| (303) 221- | Arapahoe | Centennial | Qwest Corporation | Landline |
| (303) 222- | Arapahoe | Centennial | Mcimetro, Ats, Inc. | Landline |
| (303) 223- | Denver | Denver | Global Crossing Local Servi... | Landline |
| (303) 224- | Arapahoe | Centennial | Qwest Corporation | Landline |
| (303) 225- | Denver | Denver | Global Crossing Local Servi... | Landline |
| (303) 226- | Denver | Denver | Icg Telecom Group - Co | Landline |
| (303) 227- | Adams | Adams City | Qwest Corporation | Landline |
| (303) 228- | Arapahoe | Centennial | Icg Telecom Group - Co | Landline |
| (303) 229- | Denver | Denver | Cellco Partnership Dba Veri... | Cell Phone |
| (303) 230- | Denver | Aurora | Metrocall | Landline |
| (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 | Metrocall | Landline |
| (303) 241- | Denver | Denver | Cellco Partnership Dba Veri... | Cell Phone |
| (303) 242- | Denver | Denver | Mcimetro, Ats, Inc. | Landline |
| (303) 243- | Denver | Denver | Cellular One Of Ne Colorado | Cell Phone |
| (303) 244- | Denver | Denver | Qwest Corporation | Landline |
| (303) 245- | Boulder | Boulder | Qwest Corporation | Landline |
| (303) 246- | Jefferson | Bow Mar | 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 | Blue Licenses Holding, Llc | Cell Phone |
| (303) 250- | Arapahoe | Aurora | Blue Licenses Holding, Llc | Cell Phone |
| (303) 251- | Arapahoe | Cherry Hills | Metrocall | Landline |
| (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- | Jefferson | 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. | Cell Phone |
| (303) 260- | Denver | Denver | Qwest Corporation | Landline |
| (303) 261- | Adams | Watkins | Qwest Corporation | Landline |
| (303) 262- | Denver | Denver | At&t Local | Landline |
| (303) 263- | Jefferson | Bow Mar | Cellco Partnership Dba Veri... | Cell Phone |
| (303) 264- | Arapahoe | Centennial | Teleport Communications Gro... | Landline |
| (303) 265- | Arapahoe | Centennial | Qwest Corporation | Landline |
| (303) 266- | Arapahoe | Centennial | Metrocall | Landline |
| (303) 267- | Arapahoe | Centennial | Qwest Corporation | Landline |
| (303) 268- | Arapahoe | Centennial | Icg Telecom Group - Co | Landline |
| (303) 269- | Arapahoe | Aurora | Qwest Corporation | Landline |
| (303) 270- | Denver | Denver | Qwest Corporation | Landline |
| (303) 271- | Jefferson | Evergreen | Qwest Corporation | Landline |
| (303) 272- | Denver | Denver | Qwest Corporation | Landline |
| (303) 273- | Jefferson | Evergreen | 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 | Evergreen | Qwest Corporation | Landline |
| (303) 278- | Jefferson | Evergreen | Qwest Corporation | Landline |
| (303) 279- | Jefferson | Evergreen | 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 | Mediaone Telecomm Corp., Db... | Landline |
| (303) 285- | Denver | Denver | Icg Telecom Group - Co | Landline |
| (303) 286- | Adams | Adams City | Qwest Corporation | Landline |
| (303) 287- | Adams | Adams City | Qwest Corporation | Landline |
| (303) 288- | Adams | Adams City | Qwest Corporation | Landline |
| (303) 289- | Adams | Adams City | Qwest Corporation | Landline |
| (303) 290- | Arapahoe | Centennial | 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 |
| (303) 300- | Denver | Denver | Qwest Corporation | Landline |
| (303) 301- | Adams | Denver | Icg Telecom Group - Co | Landline |
| (303) 302- | Denver | Denver | Xo Colorado, Llc | Landline |
