Hello @joeydnewyork,
Thank you for posting. You can locate the contacts that were added from the web sign up form by first going to your Contacts tab.
Then clicking on active on the left hand side.
Once all of you active contacts are displayed make sure that the view is set to Name, Email, Date Added, Source. Then by clicking on source it will show you all of the contacts that were added from website sign up form first.
The contactst should appear like this:
I hope this was helpful to you! Please let me know if you have any more questions.