DNS propagation can take anywhere from 24 to 48 hours to complete. Usually, it completes much quicker but it depends on how the registrar handles changes like that. Give it some time and if it's not working after 48 hours, I would give customer support a call.
Once your issue is resolved,
please be sure to come back and click accept for the solution
Make sure you've added the domains to your hosting account and look up the proper nameservers for each, as they could be different than the primary.