You can block Google from indexing subdomains along with your main account domain with Robots.txt if you wish.

For instance, if you own example1.com and have a subdomain named example2.com that Google has indexed as "example2.example1.com", you can prevent the indexing of such a set of domains.

In the root of /public_html for your main domain example1.com add the following to robots.txt for any add-on domains:

User-agent: *
Disallow: /example2.com
 

Any additional domains you would add an additional line:

Disallow: /example3.com

Was this answer helpful? 0 Users Found This Useful (0 Votes)