| Business | Phone |
| Castillo's Mail Center 337 E 1st St, Calexico 92231 | (760) 357-2999 |
| Pan American Mail Box Co 233 Paulin Ave, Calexico 92231 | (760) 357-6441 |
| Cal-Mex Special Svc 120 Rockwood Ave, Calexico 92231 | (760) 357-2551 |
| Popular Service 141 E 3rd St, Calexico 92231 | (760) 357-3613 |