Which of the following is NOT a common way to validate control over a domain for a domain-validated X.509 certificate?

Domain validated X.509 certificates are a type of SSL certificate that is used to secure websites. They are issued to organizations that have control over the domain name.

There are three common ways to validate control over a domain for a domain-validated X.509 certificate:
- Changing the DNS TXT record: This involves adding a specific TXT record to the domain's DNS zone.
- Publishing a nonce provided by the certificate authority as part of the domain information: This involves publishing a random value (nonce) that is provided by the certificate authority in the domain's DNS zone or web server configuration.
- Responding to an email sent to a contact in the domain's WHOIS information: This involves responding to an email sent to a contact in the domain's WHOIS information with a specific code.

Changing the IP addresses associated with the domain is not a common way to validate control over a domain for a domain-validated X.509 certificate. This is because IP addresses can be changed easily, and it would be difficult for a certificate authority to verify that the organization still has control over the domain if the IP addresses were changed.