Its studios are located in the same building as Channel 5 WKRG-TV on Broadcast Drive in Mobile, and the transmitter is just north of downtown.

The station was originally owned by movie theater owner, architect, and broadcasting pioneer Kenneth R. Giddens, whose family-owned WKRG-TV Inc. put WKRG (710 AM) on the air on September 26, 1946.

[5] The station would have an FM companion broadcasting on 99.9 MHz starting on October 16, 1947 (today's WMXC), followed by television partner WKRG-TV on September 5, 1955.

In March 1970, the Federal Communications Commission (FCC) enforced new rules preventing future radio and television ownership combinations in the same market, which allowed the stations of WKRG-TV, Inc. to remain standing, or "grandfathered".

On August 12, 2004, WNTM received another change in call letters, this time to WPMI,[3] due to the station's close relationship with WPMI-TV.

The new partnership also meant the end of affiliation with ABC News Radio, meaning no more of Paul Harvey's daily and weekend broadcasts for listeners on the central Gulf Coast.

Until November 2007, former WKRG-FM disc jockey Scott O'Brien hosted "Mobile's First News" and "Ask the Expert" in the morning.

[3] Michael P. Sloan was a newsbreak reader and Daniel Shane McBryde hosted his own afternoon program during the first WNTM era; both are WABB veterans.

Long time radio personality Yvonne Morrison hosted "The Garden Show" alongside reporter Charlie Moss on Saturday mornings.