Assigning numerical number to registrants

Does Jotform have the ability to assign registrants a number? For instance, I am having an estate sale and I want people to be able to register with their information and then automatically assigned a numerical number for entry. Is there any way to do this? I understand that I may need to upgrade to a paid subscription. Thank you.

You may add Unique ID widget to the form to assign number for each submission. Please see the guide below that can help you with.

https://www.jotform.com/help/79-How-to-Add-Custom-Unique-IDs-to-your-Form-Submissions

You may use this widget with the free subscription as well. Thanks!