I just changed the nameservers for my domain. How long will it take to fully update?

In this article:

Updating nameserver information that is tied to your domain, can take 24-48 hours to finish updating. Nameserver changes have to propagate through the primary root servers of the internet and unfortunately, cannot be expedited. In most cases the propagation period could be less than 24-48 hours but, if you updated your nameservers within the last 48 hours and you're not seeing the results you wanted, please contact customer support.