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.
