I found Zam's Area and Zone List
to be pretty up-to-date. Or you could try LOTRO-wiki, which has a List of Areas
. It's missing a lot of details because the site don't have enough contributors.
There's always the Places Category
list on the LotRO Lorebook, if you don't mind double checking everything yourself. The amount of misinformation on that site is astounding. I sometimes wonder if we would be better off without the Lorebook. At least then people would be motivated to document the info themselves to something like LOTRO-wiki.