132.85 (LA Center)
132.850 is a Los Angeles Center low altitude sector, sector 21, covers the airspace above the TRACON (SoCal Approach) from around 14,000 feet I believe up to FL230 (23,000 feet). Most of the traffic you are hearing are departures out of LAX heading southeast and south. You will also hear San Diego arrivals and departuers to/from the north. FYI the high sector above this one, Sector 30, extending from FL240 and above, on 119.950, is combined with Sector 21 when traffic is light.
Do you have good controller reception from your location on these Center frequencies ? More LiveATC feeds covering these Center frequencies always appreciated.
JS