| Business | Phone |
| Perchak Properties 3239 Danville Blvd # D, Alamo 94507 | (925) 837-5140 |
| Aimfair Inc 3236 Stone Valley Rd, Alamo 94507 | (925) 831-1633 |
| Dara Management Inc 3040 Stonegate Dr, Alamo 94507 | (925) 256-9070 |
| R & D Management Co 3189 Danville Blvd, Alamo 94507 | (925) 837-5366 |