What is a PTR record and how to add one?
While the main purpose of the Domain Name System is to point domains to IP addresses, a PTR record works in the opposite way – it associates an IP with a domain name. Because of its purpose, a PTR record is sometimes called Reverse DNS Record. The purpose of a PTR record is mostly administrative – it shows an IP is in fact used with a particular domain.
SiteGround does not currently support PTR records creation on any hosting plans.