How To Reset DNS Zone Files
FiTo reset your DNS zone files to the defaults:
And “Advanced Zone Editor” under “Domains” Category in cPanel.
1. Select a domain from the drop-down menu.
2. Click “more” at Reset Zone File part.
3. Tick the check box next to “Are you sure you want to erase all entries and revert to the default state”?
4. Click “Reset Zone File”.