On January 22, 1947, the station was licensed for commercial broadcasting as KTLA on channel 5, becoming the first commercial television station in Los Angeles, the first to broadcast west of the Mississippi River, and the eighth commercial television station in the United States. Estimates of television sets in Los Angeles County at the time ranged from 350 to 600, since experimental station W6XAO (later KTSL and KNXT, now KCBS-TV) was already in operation broadcasting with a regular schedule. Bob Hope served as the emcee for KTLA's inaugural broadcast, titled as "The Western Premiere of Commercial Television", which was broadcast live that evening from a garage on the Paramount Studios lot and featured appearances from many Hollywood luminaries. Hope delivered what was perhaps the most famous line of the telecast when, at the program's start, he identified the new station as "KTL" – mistakenly omitting the "A" at the end of the call sign. A 10-minute fragment from KTLA's first broadcast exists at the Paley Center for Media.