You want to do something along the lines of
[0-9]{1,3}
There are some excellent examples here. Scroll down to nearly the bottom of the page, there are examples of how the various range selections (not the right term for them) work.
You want to do something along the lines of
[0-9]{1,3}
There are some excellent examples here. Scroll down to nearly the bottom of the page, there are examples of how the various range selections (not the right term for them) work.