| Business | Phone |
| Postnet Postal & Business Services 26775 Hayward Blvd # D, Hayward 94542 | (510) 581-7447 |
| Us Post Office 2163 Aldengate Way, Hayward 94545 | (510) 000-1111 |
| Us Post Office 24438 Santa Clara St, Hayward 94544 | (510) 000-1111 |
| Us Post Office 822 C St, Hayward 94541 | (510) 000-1111 |