What is the meaning of dz in dzrh?

In the context of "DZRH," the "DZ" stands for "Distant Zone," which is a prefix used in the call sign of radio stations in the Philippines. DZRH is a well-known AM radio station in Manila, primarily focused on news, public affairs, and talk programs. The "RH" in DZRH signifies "Radio Habangbuhay," highlighting its commitment to providing continuous service.