I use the Online Chat.
Tell them my service address has changed.
I provide them a address including Zip and request locals for that area.
I also say, I am in an RV. next I state mailing address remains the same.
I also use a website to determine which city I should change to for the Spot Beam to Reach us as we travel across the country. EX: Denver Service Address, I received the Denver locals from Wyoming to Oklahoma on our way to Texas. As for a service address, I just pick an RV park and give them that as an address. I do NOT state a name. We are full timers, our Dish system: Hopper, Joey, Winegard SK-1000 and Tri-pod if needed.