| Business | Phone |
| Analysts International Corp 1391 Willow Pass Rd, Concord 94520 | (925) 687-5522 |
| Digital Green 2312 Bates Ave # C, Concord 94520 | (925) 459-9101 |
| Macvolks 1921 Concord Ave, Concord 94520 | (925) 313-0760 |
| Scanplus Intl 1485 Enea Cir, Concord 94520 | (925) 674-3681 |
| Thibault Associates Inc 2300 Contra Costa Blvd # 100, Concord 94523 | (925) 676-9500 |
| Concord Information Systems 1450 Enea Cir, Concord 94520 | (925) 680-8630 |
| D B Start Inc 3681 De Rosa Ct, Concord 94518 | (925) 207-4327 |
| Enterprise Security Solutions 3055 Treat Blvd # 37, Concord 94518 | (925) 825-4991 |
| Ifuruq 2190 Meridian Park Blvd, Concord 94520 | (925) 363-5835 |
| Interworks Software Inc 2440 Stanwell Dr # 103, Concord 94520 | (925) 671-0810 |
| Iteknique Inc 1850 Gateway Blvd, Concord 94520 | (925) 825-8300 |
| L-3 Government Svc Inc 2300 Clayton Rd # 615, Concord 94520 | (925) 246-1860 |
| Lan Monte Enterprises 2401 Stanwell Dr, Concord 94520 | (925) 681-1346 |
| Network Mechanics Concord 94520 | (925) 510-9555 |
| New Solutions Concord 94520 | (925) 609-7230 |
| Phoenix Computers & Consulting 1242 Summit View Dr, Concord 94521 | (925) 825-0450 |
| Rodgers Enterprises 1861 Sunshine Dr, Concord 94520 | (925) 686-3249 |
| Techrestore 2280 Bates Ave # A, Concord 94520 | (925) 689-9488 |