| Business | Phone |
| Abarton 38 Massier Ln, Foothill Ranch 92610 | (949) 454-8207 |
| Action Hose 27241 Burbank, Foothill Ranch 92610 | (949) 452-1122 |
| Aristos Logic Corp 27051 Towne Centre Dr, Foothill Ranch 92610 | (949) 380-3400 |
| Asterisk 19762 Pauling, Foothill Ranch 92610 | (949) 609-0099 |