How to Reset Zone Files of Domain in cPanel

To reset your DNS zone files to the defaults that your hosting provider specifies, perform the following steps:

1 – Open cPanel (yourdomain/cpanel).
2 – Click on (Zone Editor) from Domains section.
3 – Click on Manage beside the domain name.
4 – Click on Gear icon in the top right in the page, and from drop menu chose Reset Zone.
5 – Click Continue to confirm.