As of July 1, 2012 (Effective Date), the use of Certificates containing Reserved IP Address or Internal Server Name has been deprecated by the CA / Browser Forum and the practice will be eliminated by October 2016.
As of July 1, 2012, Comodo will not issue a certificate with an expiration date later than 1 November 2015 with a subjectAlternativeName (SAN) extension or Subject commonName (CN) field containing a Reserved IP Address or Internal Server Name.
Effective 1 October 2016, Comodo will revoke all unexpired certificates whose subjectAlternativeName extension or Subject commonName field contains a Reserved IP Address or Internal Server Name.
If you are using an internal top level domain (TLD) which is not currently a valid TLD), please be advised that should such TLD become recognized by IANA/ICANN as a valid TLD this certificate will be revoked without further notice. Prior to the certificate being reinstated you will need to demonstrate domain ownership/control.
See the InCommon website for more information.