Domain names are not really owned but leased or registered for up to ten years at a time from various accredited agencies. The original leasor has the first chance to renew the registration when it falls due.

 

.com / .net / .biz /.org /.info /.ie/ .co.uk ?

.com or .biz - generally used by any sort of commercial business based any where but can be leased subject to a registraton fee by any one with no restrictions.

.net - usually used by technology based operations but can be leased subject to a registraton fee by any one with no restrictions.

.info - usually used by information givers, government departments etc.but can be leased subject to a registraton fee by any one with no restrictions.

.org - usually used by non profit making organizations but can be leased subject to a registraton fee by any one with no restrictions.