Once a domain name expires, it will usually move to the REGISTRAR-HOLD status.
Although the domain has technically expired, the owner still has the opportunity to renew it for at least 30 days (usually).
Under rare circumstances, a domain will not enter the REGISTRAR-HOLD status and will be dropped 1-5 days from its expiration date.
Depending on the registrar, a domain name can remain in the REGISTRAR-HOLD status anywhere from 1-45 days, with 30 days being the average.