How long will a TinyURL be available?

Question

This is not a thread about if URL shortener are good or not, I'm just wondering how long such created TinyURL will be available? Is the given URL available "forever"?

If so - is there a way to override such URL again?

Answer 1

From their website:

By entering in a URL in the text field below, we will create a tiny URL that will not break in email postings and never expires.

Obviously subject to the service existing indefinitely!

By override, do you mean modify the redirection target URL? I can't readily see anywhere that this is stated, although I'm fairly sure it cannot be modified.