Yes, you can signup for an account and add the domain to your account. Once you have added the domain to your account, please contact the registrar of the domain and update the domain name servers to ns1.dot5hosting.com and ns2.dot5hosting.com.
Once you changed the DNS information, it may take 24-72 hours for the update to go through, as it takes time for the new information to propagate to all of the DNS servers around the world.