When a domain name expires, the registrant (the person or organization that registered the domain name) has a certain period of time, called the redemption period, to renew the registration. The length of the redemption period varies depending on the domain registrar and the top-level domain (TLD) of the domain name. For example, .com and .net TLDs have a redemption period of 30-45 days, while .org TLDs have a redemption period of up to 60 days.
If the registrant does not renew the registration during the redemption period, the domain name is considered expired and enters a period called the "pending delete" status. During this period, the domain name is no longer active and the website associated with it may no longer be accessible. The domain name remains in pending delete status for approximately 5 days, after which the domain name is deleted from the WHOIS database and the domain name becomes available for registration again.
It's worth mentioning that, some expired domain names are picked up by domain investors, who then list them for sale on aftermarket platforms at a higher price.
After the pending delete status, the domain name is available for registration again, and anyone can register it on a first-come, first-served basis through a domain registrar. The availability of an expired domain name is not guaranteed, as another party may register it before you do.
