How many subdomains can i use on wildcard certificate?

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1

Hi, sorry for a separate topic.
But i search how many subdomains can i use on wildcard certificate and can’t find it)
Question: how many subdomains can i use on wildcard certificate?
I create my WC cert for *.example.com Does wildcard support all subdomains? Or WC supports only 100 domains?
I think that wildcard should support any number of subdomains.
Thanks.

2

A true wildcard (*.example.org) has no restriction. It will match an unlimited number of direct subdomains of example.org. Note, this does not work across multiple levels of labels, so it would not match a.b.example.org. It would only match at the first level: only a.example.org, b.example.org etc.

The 100 name limit comes from the total number of distinct names that you can pack into one certificate. So you could have one certificate that had 100 different wildcards, for example: *.example1.org, *.example2.org etc all the way upto *.example100.org.

3

Or:
*.sub1.domain1.tld
*.sub2.domain1.tld
*.sub3.domain1.tld
…
*.sub100.domain1.tld

Or:
*.1.domain1.tld
*.2.1.domain1.tld
*.3.2.1.domain1.tld
*.4.3.2.1.domain1.tld
…
[until you overrun the max length of 255]

Or any combination that doesn’t exceed 100 entries.

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