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Almost all wildcard certificates contain the main domain as an entry in the SSL certificate. Explicitly this means in case of a certificate issuance for *.psw-group.de the domain psw-group.de is automatically secured too.
In the case of Subdomains this is however differently arranged. If you order a certificate for *.web1.psw-group.de this does not necessarily mean that the site web1.psw-group.de is also protected by the certificate.
We tested the following products for you:
Comodo PositiveSSL
-Order for: *.psw-group.de
-Receive: *.psw-group.com PLUS psw-group.com
-Order for: *.web1.psw-group.de
-Receive: *.web1.psw-group.de PLUS web1.psw-group.de
Comodo PremiumSSL
-Order for: *.psw-group.de
-Receive: *.psw-group.com PLUS psw-group.com
-Order for: *.web1.psw-group.de
-Receive: *.web1.psw-group.de PLUS web1.psw-group.de
GeoTrust RapidSSL
-Order for: *.psw-group.de
-Receive: *.psw-group.com PLUS psw-group.com
-Order for: *.web1.psw-group.de
-Receive: *.web1.psw-group.de
GeoTrust True Business ID
-Order for: *.psw-group.de
-Receive: *.psw-group.com PLUS psw-group.com
-Order for: *.web1.psw-group.de
-Receive: *.web1.psw-group.de
GlobalSign AlphaSSL
-Order for: *.psw-group.de
-Receive: *.psw-group.com PLUS psw-group.com
-Order for: *.web1.psw-group.de
-Receive: *.web1.psw-group.de PLUS web1.psw-group.de
Certum CommercialSSL
-Order for: *.psw-group.de
-Receive: *.psw-group.com PLUS psw-group.com
Certum SpaceSSL
-Order for: *.psw-group.de
-Receive: *.psw-group.com PLUS psw-group.com
Our tests have shown that the Symantec Group, i.e. Thawte, GeoTrust, RapidSSL, VeriSign and Norton, does not deliver two-tier domains without a wildcard.