| Business | Phone |
| Affinity Products Inc 1038 Shary Cir # 11, Concord 94518 | (925) 370-3939 |
| Postal Annex+ 785 Oak Grove Rd # E2, Concord 94518 | (925) 687-7151 |
| Freightline Cases Concord 94518 | (925) 363-7353 |
| Rsc Consulting 4484 Leatherwood Ct, Concord 94521 | (925) 798-9323 |
| Shipping Express 3421 Chestnut Ave, Concord 94519 | (925) 825-4140 |