sentences:  Retail registrars such as GoDaddy or eNom retain names for auction through services such as TDNAM or Snapnames through a practice known as domain warehousing.Drop catch services are performed by both ICANN-accredited registrars and non-accredited registrars.Some registry operators (for example dot-РФ, dot-PL, dot-RU, dot-ST, dot-TM, dot-NO) offer a service by which a back-order (also sometimes known as a "domain future" or "domain option") can be placed on a domain name.