How do you address Warrant Officers?

I’m used to Sir or Chief. Either one works for me. Just don’t call me late for dinner.

I prefer that you genuflect in my god like presence, and either call me your holiness, why not making direct eye contact. Or Chief works too. But this advice is only valid for the Army. As the USMC doesn't like being called Chief, you can call them Sir/Ma'am, Warrant Officer for W1 or Chief Warrant Officer 2-5 (CWO for short).

Usually name first, then street address, then city, state, and zip code.

I always used Sir or Ma'am. Sorry about the above, I couldn't resist.....