| Business | Phone |
| Us Post Office 100 Harrison Ave, Auburn 95603 | (530) 000-1111 |
| Us Post Office 13116 Lincoln Way, Auburn 95603 | (530) 000-1111 |
| Us Post Office 1583 Lincoln Way, Auburn 95603 | (530) 000-1111 |
| Us Post Office 371 Nevada St, Auburn 95603 | (530) 000-1111 |