Vanguard Radio Network (VRN) is a Philippine radio network. Its corporate office is located at Rm. 614, Cityland Shaw Tower, St. Francis St. cor. Shaw Blvd., Ortigas Center, Mandaluyong, and its main headquarters is located at Pan-Philippine Highway, Brgy. Sangitan East, Cabanatuan. VRN operates a number of stations across regional places in Luzon under the Big Sound FM and Big Radio brands.
VRN stations AM stations Callsign Frequency Location Owned since DZXO 1188 kHz Cabanatuan 1969 DWMG 1395 kHz Solano 1969
FM stations Branding Callsign Frequency Location Owned since Big Sound FM Cabanatuan DWWG 101.5 MHz Cabanatuan 1981 Big Sound FM Baguio DWBG 95.9 MHz Baguio 1994 Big Sound FM La Union DWAA 105.5 MHz San Fernando, La Union 1983 Big Sound FM Tuguegarao DWXY 100.5 MHz Tuguegarao 1988 Big Sound FM Cauayan DWWC 95.3 MHz Cauayan 1983 Big Sound FM Solano DWDC 101.3 MHz Solano 1988 Big Radio Tagbilaran DYVA 88.7 MHz Tagbilaran 2015 Big Radio Bongabong 107.7 MHz Bongabong 2022
Former stations Callsign Frequency Location Years owned Current status DZYG 1330 kHz Cabanatuan 1961–1972 Closed during Martial Law. DWNG 97.5 MHz Lucena 1997–2014 Acquired by Southern Tagalog Sweet Life. Currently broadcasting as Gospel Radio. DZLC 98.5 MHz Lipa 2019–2022 Currently broadcasting as Cool FM.
Trademark dispute In July 2011, VRN filed a legal trademark infringement case at the Intellectual Property Office against Manuelito F. Luzon, owner of ZimZam Management which operates and manages Metro Manila station DWKY (which used the "Big Radio" brand). Luzon was accused of using the said brand without any permission from VRN, citing that VRN already owned the said brand alongside the "Big Sound FM" brand. The case was upheld in 2017, and Luzon violated Section 147 of the Intellectual Property Code of the Philippines.
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