You see it on license plate frames all over Los Angeles. What does KMA-367 mean anyway? KMA-367 was the official Federal Communications Commission (FCC) call sign for Los Angeles Police Department radio transmitters from 1948 through the 1980s. Those driving around with these license plate holders are associated with the LAPD. Seen less frequently are license holders displaying KMA-628, associated with the Los Angeles County Sheriff's Department.
Visit An Unofficial History of the Los Angeles Police Department's Communications Division.