URL shortener which produces many short URL for the same URL

This may sound as a strange question, as one is usually looking for a URL shortener that will shorten many a list of many URLs, instead I need that, given 1 single URL it will output many URLs (like 10, 20) which redirect to the same input URL. Don't know if anything like this exists so I'm asking here (don't even know if this is the right section but I didn't know where to post it)

Thanks