Vertex Group 624 S Grand Ave Los Angeles, CA 90017 Phone : (213) 996-1998 Vertex Group Business Category Telephone Companies One Suite Corp 615 S Grand Ave Los Angeles, CA 90017 Phone : (213) 996-1998 Business Category Telephone Communications Services Vtx Telecom 615 S Grand Ave Los Angeles, CA 90017 Phone : (213) 996-1998 Business Category Telephone Communications Services