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Boulder, Colorado Area Codes - Click here for City Guide
| Area Code Directory | | Zip Code | City | State | County | Area Code | Time Zone | Latitude/Longitude | | 80301 | Boulder | CO | Boulder | 303 | MST | 40.043999/-105.194000 | | 80302 | Boulder | CO | Boulder | 303 | MST | 40.040199/-105.362602 | | 80303 | Boulder | CO | Boulder | 303 | MST | 39.973301/-105.195801 | | 80304 | Boulder | CO | Boulder | 303 | MST | 40.042801/-105.288399 | | 80305 | Boulder | CO | Boulder | 303 | MST | 39.981800/-105.252800 | | 80306 | Boulder | CO | Boulder | 303 | MST | 40.043900/-105.306900 | | 80307 | Boulder | CO | Boulder | 303 | MST | 39.985802/-105.237099 | | 80308 | Boulder | CO | Boulder | 303 | MST | 39.959599/-105.510201 | | 80309 | Boulder | CO | Boulder | 303 | MST | 40.007401/-105.266296 | | 80310 | Boulder | CO | Boulder | 303 | MST | 40.007301/-105.265999 | | 80314 | Boulder | CO | Boulder | 303 | MST | 40.088699/-105.199501 | | 80321 | Boulder | CO | Boulder | 303 | MST | 40.014400/-105.208801 | | 80322 | Boulder | CO | Boulder | 303 | MST | 40.014400/-105.208801 | | 80323 | Boulder | CO | Boulder | 303 | MST | 40.014400/-105.208801 | | 80328 | Boulder | CO | Boulder | 303 | MST | 40.014400/-105.208801 | | 80329 | Boulder | CO | Boulder | 303 | MST | 40.014400/-105.208801 |
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