Indeed! As someone said to me recently, it's become a case of whatever you're having yourself! ;-)
Stricly speaking we all live in: X, Any Road, Dublin 1-24 (whichever applies to you). If you want to insert the name of a townland (putative or otherwise) in between, it's pretty much up to you. Very Irish, basically.
Ben Dunne is currently advertising his KCR Health Club on the radio as being in Terenure, D 12. There is NO part of Terenure in D.12. And, as we all know, KCR stands for Kimmage!!! Doh!
D.