| Business | Phone |
| Enercom International 36952 Cherry St # 180, Newark 94560 | (707) 897-1666 |
| S J & N 36601 Newark Blvd, Newark 94560 | (510) 797-7843 |
| Wes Tel System Inc 8430 Central Ave, Newark 94560 | (510) 574-1800 |
| Trademark Communication Svc 39899 Balentine Dr, Newark 94560 | (510) 490-8027 |