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Wildcard
How much does a single domain SSL certificate cost?
DV starts at $7.66/yr (Comodo PositiveSSL). OV starts at $37.33/yr (Comodo InstantSSL), and EV starts at $75/yr (Comodo PositiveSSL EV). Choosing a 2- or 3-year subscription term lowers the per-year cost while locking in the price for the full period.
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Can a single domain SSL certificate secure subdomains like mail.example.com?
No. Only the primary FQDN and its WWW counterpart are covered, so a separate hostname like mail.example.com falls outside scope. To secure all hosts under one parent domain in a single product, the Wildcard SSL certificate is the right fit. To put several distinct domains together on one certificate, look at the Multi-Domain (SAN) SSL certificate.
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What’s the difference between DV, OV, and EV single domain SSL certificates?
Validation depth and issuance time are what differ. Encryption is identical at 256-bit AES across all three. DV issues in about 5 minutes after an automated domain check, OV in 1–2 business days after a business identity check, and EV in 1–3 business days after extended vetting.
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Does a single domain SSL certificate cover both www.example.com and example.com?
Yes, automatically, with every standard single-domain certificate from Sectigo, DigiCert, GeoTrust, RapidSSL, and GoGetSSL. There is no “include both” checkbox at checkout and no need to specify the second name during the CSR generation.
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Is a multi-domain SSL certificate cheaper than buying separate certificates?
Yes. Pricing starts at $21.66/year for 3 domains, less than three separate single-domain certs.
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Does a multi-domain certificate work for Microsoft Exchange?
Yes. Exchange is the original UCC use case, and the same certificate covers Office 365 hybrid setups. The Common Name and autodiscover hostname go on as SANs.
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Can I add or remove domains after the certificate is issued?
Yes. Most multi-domain certificates support free reissuance during the validity period, so SANs can be added or removed as needed.
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What’s the difference between a multi-domain SSL and a SAN SSL certificate?
None. Both names describe the same product. “SAN” refers to the Subject Alternative Name field that holds the additional hostnames, so it’s the term you’ll see in CSR forms and server configuration. “Multi-domain SSL” is the buyer-facing label.
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How many domains can one multi-domain SSL certificate secure?
Up to 250 SANs across SSL Dragon’s catalog. Most products include 3 domains by default (1 Common Name plus 2 SANs) and allow adding more at checkout or reissuance.
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How do I generate a CSR for a multi-domain wildcard certificate?
Use our free CSR Generator tool or generate it on your server with OpenSSL. The Common Name (CN) must be a non-wildcard domain; list any wildcard entries (*.domain.com) in the SAN field instead, never in the CN.
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