Apartment Owners/ Building Managers List in Los Angeles County (LA)

I need a list of phone numbers for the following areas: Located in L.A. County, CA 1. Apartment owners 2. Apartment Building Managers 3. Apartment Management Companies 4. For cities in the Los Angeles County area I need up to 5,000 total or as many as you could get. Needed information: Category, Person's Name, mailing address, Phone number, Zip code Good to have fields: eMail addresses If you have a list please provide some validity for the list, if you are able to create one from the defined areas it would be better. List must be current and good quality.