Do you want a pentest.org subdomain for free? EASY, just:
1) Share this website (www.pentest.org) on your Twitter or LinkedIn account
2) Send an email to with the link of the post where you shared our website (www.pentest.org) and which subdomain do you want to register (and which IP address to point!)
In less than 24h you will have an A record for the subdomain you choose for FREE. We suggest you to check the subdomain is free by trying to resolve it (i.e. do a ping command).
Notice: only one record for person is allowed but there's absolutely NO LIMITATION on the kind of subdomain name you can register (it can be any string with the only exception of "www"). In example, you could register: "mike" thus the resulting domain will be "mike.pentest.org".