Generally speaking, when you purchase a VPS host, you will receive a free IPv4 address (some NAT VPS are shared IPs and will give you a URL address after purchase, such as CloudIPLC and Uovz VPS). Some VPS host providers (such as Linode and DigitalOcean) will also give you one as a gift. IPv6, and the IPv6 address will be automatically enabled after the VPS is successfully created.