Colfax City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 309 | US | Illinois - IL | Colfax | Central | Details |
| 318 | US | Louisiana - LA | Colfax | Central | Details |
| 509 | US | Washington - WA | Colfax | Pacific | Details |
| 515 | US | Iowa - IA | Colfax | Central | Details |
| 530 | US | California - CA | Colfax | Pacific | Details |
| 701 | US | North Dakota - ND | Colfax | Central / Mountain | Details |
| 715 | US | Wisconsin - WI | Colfax | Central | Details |
| 765 | US | Indiana - IN | Colfax | Eastern | Details |