Puerto Rico's first advertising agency, the West Indies Advertising Company , was founded in San Juan in 1933, by the Abarca family, which also owned a successful structural steel company. By 1942 the advertisement agency's management founded WIAC at 580 kHz, with Félix Muñiz, the brother of Tomás Muñiz acquired the station, along with WIAC-FM 102.5 FM, which began operations that same year. In 1962, Bestov acquires WISA 1390 AM in Isabela serving the western and north area, and it is owned by Mejia's subsidiary, Isabela Broadcasting, Inc., this serving as a satellite of WIAC. In 1982, WIAC changed its news programming, with the branding of WIAC NotiReloj. In 1998, WIAC NotiReloj became Cadena Radio Puerto Rico, with a News/Talk format. In 1999, Bestov Broadcast Group acquires WEKO 930 in Cabo Rojo from David Ortiz Cintron, a radio entrepreneur from Cabo Rojo, which becomes a repeater of WIAC. Bestov also acquires WTIL1300 AM in Mayaguez and would become the repeater of WEKO until 2003. In 2009, WIAC reached an Agreement with Boricua-JE Broadcasting, inc., the station's licensee to change to Boricua 740. On February 1, 2012 WIAC's owner Bestov Broadcast Group joined in an alliance with Noti-Luz, buying from Empower Media Group, forming Puerto Rico's only AM & FM news & talk station. The Noti-Luz Network was conformed by WGIT 1660 AM in Canóvanas, WIAC 740 AM in San Juan/Ponce, WYAC 930 AM in Cabo Rojo/Mayagüez, WISA 1390 AM in Isabela, WJDZ 90.1 FM in Pastillo, WNNV 91.7 FM in San Germán, WEKO 1580 AM in Morovis & WXRF 1590 AM in Guayama. On June 1, 2012, it changed name from Radio 740 to "Acción 740", later, "Acción Radio" with news at the top of the hour. that same month, WIAC was purchased by Héctor Marcano Martínez's subsidiary, Metro Media Broadcasting, which also owns WWXY-LD Channel 8.1 in San Juan. On October 2, a legendary Broadcast Pioneer Alan Mejía & former owner Bestov Broadcast Group returned to WIAC and changed their news/talk programming to a Spanish Variety format as WIAC 740 La Original. In November 2012, the station's programming was changed. From March 2016 to June 2017, WIAC 740 AM broadcasts Monday-Friday from 3AM to 10PM, Saturdays from 4AM to 11PM and Sundays from 5AM to 10PM, while its station website, WIAC740.com, continues on the air during the overnight hours for more programming. On May 29, 2017, WIAC 740 ceased operations on its synchronized station transmitter located at Peñuelas and cancelled the license on May 30, 2017. As a result, WIAC 740 is no longer heard in the southern Puerto Rico Area. In June 2017, WIAC 740 AM switched back to broadcast operations, 24 hours a day, 7 days a week. However, In August WIAC would return to broadcast operation until 10PM. On Saturdays from 4AM to 11PM and Sundays from 5AM until 9PM. Due to the passage of Hurricane Maria, WIAC was forced to resume operations because of damages in the transmitter antenna caused by the Hurricane. WIAC will reduced its operations from a Diesel generator until 6PM. In 2018, WIAC returns to its full 24-hour broadcast operation. However, In June, WIAC returns to reducing operations, ending their broadcast day at 6PM, occasionally on Wednesdays, Thursdays and weekends at 7PM.
