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| ANSWER NETWORK | CORONA, CA | (909) 737-0044 |
| BUSINESS TELECOMMUNICATIONS SYSTEMS INC | CORONA, CA | (909) 270-3275 |
| CONCEPT TELEPHONE | 1760 CALIFORNIA AVE CORONA, CA | (909) 738-8205 |
| FOOTHILL PAGING | CORONA, CA | (909) 549-3505 |
| LOZON | CORONA, CA | (909) 280-0093 |
| MULTICELL-CORONA | 261 S LINCOLN AVE CORONA, CA | (909) 737-1800 |
| QUAN COMMUNICATIONS | 416 W 6TH ST CORONA, CA | (909) 898-1644 |
| SINGULAR WIRELESS | 1560 W 6TH ST CORONA, CA | (909) 371-4363 |
| TELEPHONE CONNECTION THE | CORONA, CA | (909) 371-8811 |
| VETEREN'S TELECOMMUNICATIONS INC | 355 N SHERIDAN ST CORONA, CA | (909) 493-6690 |
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