Thank you for the response Josh. What do you recommend for this. We are creating two landing pages to test one will have a form for a harder sell and the other will have a request a call back. Can we have the phone number auto populate?
Are you looking for a trackable phone number? I believe you can (or could) do this with Google AdWords years ago. Not sure if it still exists.
I think the tel: command would also only work on mobile or if you have something like Skype installed. But it's a good practice to use anyway since nothing drives me crazier than not being able to click a phone number on my cell. Well, maybe a few things drive me crazier
Most phones do this automatically, but there is a telephone link protocol you can reference.
See this post: https://davidwalsh.name/phone-link-protocol