The Rolex Dealer where you purchased the watch can be found on the green plastic card that you receive when you receive your Rolex Datejust timepiece.
All Rolex retailers provide aftercare service, regardless of whether you bought the watch in their store or not.
Rolex dealers, instead of servicing Rolex Datejusts, offer pickup and delivery services. Your Rolex watch can be taken to a Rolex authorized dealer for service if you drop it off. If you don't know the name of the Rolex Boutique or authorised Rolex store nearby, you can find a store locator on Rolex's website.
Google Maps does not appear to make any distinction between Rolex retail store and Rolex Service Centers. In this context, Rolex.com is the best way to locate local Rolex dealers.