| Zip Code | Primary City | Secondary City | | 80023 | Broomfield | Thornton, Denver, Westminster | | 80221 | Denver | Thornton, Northglenn, Westminster, Federal Heights, Federal Hgts | | 80229 | Denver | Thornton, Welby, | | 80233 | Denver | Thornton, North Glenn, Northglenn, | | 80234 | Denver | Thornton, Federal Heights, Broomfield, Westminster, North Glenn, Northglenn | | 80241 | Thornton | Thornton, East Lake, Eastlake, Denver, Northglenn, Westminster | | 80260 | Denver | Thornton, Federal Heights, Northglenn, Westminster, Federal Hgts | | 80601 | Brighton | Thornton | | 80602 | Brighton | Thornton |
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