About a year, year and a half ago I used an addon that had this function. I think it was something that ONLY offered this, and while not a crucial or ground breaking thing, it's a simple addition that makes it easier to not unintentionally spam this or that zone while recruiting/selling etc.
The closest thing I can find is the "zone name alert" addon, which may even be the same mod but further in development, with that function removed.
If anyone has any feedback that might help me locate this particular addon, I would appreciate it
Displays the name of the subzone you're entering. Examples: "Gold Coast Wayshrine", "Wayrest Market Square", "Alessia Bridge".
If subzone name is not available, displays the name of the whole zone. Examples: "The Gold Coast", "Wayrest", "Cyrodiil".
in its features. Wouldn't the subzone name still help you with whether you've advertised there?