| Business | Phone |
| Electronic Processing Corp 8787 Complex Dr, San Diego 92123 | (858) 712-1654 |
| Netkey Inc 3333 Camino Del Rio S, San Diego 92108 | (619) 516-5234 |
| Plastic Card Svc 9870 Marconi Dr, San Diego 92154 | (619) 661-1936 |
| First National Merchant Sltns 1804 Garnet Ave # 429, San Diego 92109 | (858) 270-9215 |