regex - how can I make a regex with a range specific to a number [1-7543]?

Question

I Tried this for example: ^([1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-9][0-9][0-9][0-9)$

However, this covers 1-9999, not sure how can I be specific to that number (7543) as a limit. I am really new to regex.

Any help? thanks!

标签： regex