Multi-domain SSL certificates allows one IP address to serve multiple domains and subdomains, though all of those domains must have the same owner.
Multi-domain certificates are also known as a Subject Alternative Name (SAN) certificate. They are considered special due to the owner’s ability to secure multiple domains and sub-domains with one SSL certificate.
Or multiple domain names, such as
The only requirement is that all domain names are registered under the same domain owner. Each domain listed on the account is required to prove domain ownership. The following information is required from the client:
A multi-domain SSL certificate is structurally same as all other certificates. Multi-domain certificates allow for a single unique IP address for multiple domain names. A primary SSL certificate is issued with additional alternative domains listed on the same certificate. One certificate can be installed for all domains listed within the approved list.
A multi-domain name provides the ability to include multiple fully-qualified domain names (FQDN) within the same certificate. However, multi-domain certificates will only support the specific FQDN entered into the certificate. In most cases, multi-domain certificates will support up to 100 different FQDNs in one certificate. These certificates include the following:
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