| Business | Phone |
| Carpenters Local Union 404 Tiger Ln, Columbia 65203 | (573) 445-5212 |
| Central Missouri American Pstl 11450 S Airport Dr, Columbia 65299 | (573) 817-3036 |
| National Postal Mail Handlers 11200 S Airport Dr, Columbia 65201 | (573) 442-4980 |
| National Assn-Letter Carriers 2111 Burlington St, Columbia 65202 | (573) 886-7828 |
| Laborers Local 773 611 N Garth Ave, Columbia 65203 | (573) 449-5723 |