| 80510 Allenspark | 303/720 | Boulder County | Colorado (CO) |
| 80301 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80302 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80303 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80304 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80305 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80306 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80307 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80308 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80309 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80310 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80314 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80321 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80322 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80323 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80328 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80329 Boulder | 303/720 | Boulder County | Colorado (CO) |
| 80025 ElDorado Sprg | 303/720 | Boulder County | Colorado (CO) |
| 80025 Eldorado Springs | 303/720 | Boulder County | Colorado (CO) |
| 80516 Erie | 303/720 | Boulder County | Colorado (CO) |
| 80516 Frederick | 303/720 | Boulder County | Colorado (CO) |
| 80533 Hygiene | 303/720 | Boulder County | Colorado (CO) |
| 80314 I B M | 303/720 | Boulder County | Colorado (CO) |
| 80455 Jamestown | 303/720 | Boulder County | Colorado (CO) |
| 80026 Lafayette | 303/720 | Boulder County | Colorado (CO) |
| 80501 Longmont | 303/720 | Boulder County | Colorado (CO) |
| 80502 Longmont | 303/720 | Boulder County | Colorado (CO) |
| 80503 Longmont | 303/720 | Boulder County | Colorado (CO) |
| 80027 Louisville | 303/720 | Boulder County | Colorado (CO) |
| 80028 Louisville | 303/720 | Boulder County | Colorado (CO) |
| 80540 Lyons | 303/720 | Boulder County | Colorado (CO) |
| 80466 Nederland | 303/720 | Boulder County | Colorado (CO) |
| 80322 Neodata | 303/720 | Boulder County | Colorado (CO) |
| 80323 Neodata | 303/720 | Boulder County | Colorado (CO) |
| 80329 Neodata | 303/720 | Boulder County | Colorado (CO) |
| 80321 Neodata Business Reply | 303/720 | Boulder County | Colorado (CO) |
| 80328 Neodata Business Reply | 303/720 | Boulder County | Colorado (CO) |
| 80503 Niwot | 303/720 | Boulder County | Colorado (CO) |
| 80544 Niwot | 303/720 | Boulder County | Colorado (CO) |
| 80471 Pinecliffe | 303/720 | Boulder County | Colorado (CO) |
| 80310 Residence Halls University of Co | 303/720 | Boulder County | Colorado (CO) |
| 80028 Storage Technology Corp | 303/720 | Boulder County | Colorado (CO) |
| 80027 Superior | 303/720 | Boulder County | Colorado (CO) |
| 80309 University of Colorado | 303/720 | Boulder County | Colorado (CO) |
| 80481 Ward | 303/720 | Boulder County | Colorado (CO) |
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