Is there a registar that offers SSL certificates for:






  • 6
    Wouldn't *.example.com cover *.*.*.*.*.*...*.example.com? – ceejayoz Apr 11 '10 at 21:15
  • Not a chance. This was the behaviour of mozilla browsers until relatively recently, but it violated the RFC and they fixed it. – Falcon Momot Jun 23 '14 at 21:52

Actually, wildcards only work on the first level of a subdomain in most browsers. So a wildcard certificate for *.example.com wouldn't work on mail.test1.example.com.

Web browsers also don't know what to do with a certificate for somthing.*.example.com either. You best option is to get a SAN certificate that you can include the specific hostnames in no matter what level they are on.

  • "wildcards only work on the first level of a subdomain in most browsers". Do you have any references for this? I'm not disputing, just curious. – John Gardeniers Apr 12 '10 at 4:39
  • 5
    Certainly. RFC2818 (ietf.org/rfc/rfc2818.txt) states: "If more than one identity of a given type is present in the certificate (e.g., more than one dNSName name, a match in any one of the set is considered acceptable.) Names may contain the wildcard character * which is considered to match any single domain name component or component fragment. E.g., .a.com matches foo.a.com but not bar.foo.a.com. f.com matches foo.com but not bar.com." – Robert Apr 13 '10 at 7:03
  • 1
    +1 Wildcard certs do indeed only work for the first level subdomain. – Tatas May 17 '10 at 15:28

In case it helps anyone, double wildcard certs don't actually work.

(from firefox) www.test.example.com uses an invalid security certificate.

The certificate is only valid for *.*.example.com

(Error code: ssl_error_bad_cert_domain)


As ceejayoz says - a standard wildcard certificate will do exactly what you desire.

I assume you're looking for that style of certificate because you want something cheaper? If so, then no can do, you have to purchase a wildcard.


As wildcard SSL certificate is used to secure unlimited number of sub-domains(first level).

Example 1: To secure *.domainname.com, you need to buy Wildcard SSL certificate for Doaminname.com,

Here in this case, domainname.com will be your first level domain.

Example 2: To secure something.*.domainname.com, you need to buy wildcard for *.domainname.com,

Here in this case, *.domainname.com will be your second level domain.

  • Example 2 is simply wrong; see Falcon's comment on the original question. Example 1 has nothing to do with the question as asked. – MadHatter Nov 6 '15 at 8:19

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