Hyperlink using existing data

Hello all. I'm new here and learning a lot as I try to search for help.

I haven't been able to find what I'm looking for so I thought I'd ask.

I am trying to add a hyperlink using data from a cell.

For example:
A2 is 12345
I want to create a hyperlink in B2 that is website.com/12345

I have a list of serial numbers and I would like to be able to link directly to them.

Thank you

It works for creating the link. I mouse over it and it is correct but when I click on it all that loads is the default opening page. I think it may be an issue with the way the page loads although if I have the same link somewhere else (Word doc, IM program etc) it works.

Well I take it back. The same link in Word doesn't work. It does work if I copy and paste it directly into the browser.

I'll have to see what I can do about that.