This didn't work for me the first three times I tried. It said I had to log into the app and deactivate my account (which of course I can't do because I don't have an account). It eventually claims to have worked on the fourth try, but I have no way of checking because it doesn't let you look up numbers without being logged in.
You can login to the website using a throwaway or junk Gmail account, give the website access to your Gmail contacts (which is zero), and then lookup any number.
It is.
So I click on "suggest a better name" in a naive attempt to erase myself from the grid.
I can't because they "don't collect personal information about private individuals in the EU".