The station's studio and transmitter is located at the RMN Broadcast Center, Unit 807, 8th Floor, Atlanta Centre, Annapolis St., Greenhills, San Juan, Metro Manila.

It was rebranded as 93.9 WKC on May 16, 1985, a C-D-E market radio station with famous taglines including "We are family".

It was managed by Mike Enriquez†, at that time known as "Baby Michael", along with former WBL DJs Hillbilly Willy, Rudolf Rivera, Ray "The Count" Mambo, Super Mitch.

[3] On November 23, 1999, at 6:00 am, 93.9 FM reformatted as 939 KCFM (pronounced as "ninety-three-nine"), now catering to the A-B market, with its slogan "Live It Up!"

Among its notable DJs were Chico and Delamar (currently from Monster Radio RX 93.1) and King DJ Logan.

By January 2010, iFM also launched a new campaign as "Ang Bago Mong FM" (Your New FM) with new DJs, new programs, internet promotions and the addition of new talents like Megandang Megan, Nikka Dyosa, Kara Lambingera (Klariz Magboo), YouTube sensations Kuya Jobert and Sir Rex Kantatero, iFM continued to bring quality entertainment to the metro.

In late 2011, the station launched a new slogan called Ambot sa Kambing na may Bangs!

June 1, 2015, saw the return of Celine Labuyo (from 106.7 Energy FM) as Nikka Loka, and its new slogan #RamdamKita.

On November 9, 2015, 93.9 iFM and its provincial stations launched its new logo and slogan, Ang Bestfriend Mo!