I work for a non-profit which is just about to conduct a telephone
> survey of rental households in Los Angeles, and we are seeking maps
> (or mapable information) about telephone numbers. When we call renters
> (as well as smaller sample of apartment owners), we want to know if
> they fall in the City of Los Angeles or an adjacent community.
How would you know if a household is rental, boarder, or homeowner?
I must point out that although your project is legal in the U.S., these surveys, which I seem to be bombarded with at home, are a nuisance. Some households have ill people and such phone calls represent an unnecessary disturbance and hardship on such people. It certainly was to my family. I had to rip out my mother's phone line -- and cut off my telephone contact with her -- as a result of such calls.
Consequently I refuse to answer your question. For other viewers who choose to answer, I respectfully ask them to first thing about the nuisance aspect such "survey" phone calls.