| Business | Phone |
| A F Ge District 12 504 W Mission Ave # 101, Escondido 92025 | (760) 233-7600 |
| Communications Workers-America 1525 Simpson Way, Escondido 92029 | (760) 743-4554 |
| National Assn-Letter Carriers 1535 S Escondido Blvd, Escondido 92025 | (760) 735-9952 |