As of 2019, the .uk register held over 12,000,000 .uk domain names,[2] making it the fourth largest ccTLD in the world. Nominet also deals with disputes about registrations of .uk domain names, via its Dispute Resolution Service (DRS)[3] which is similar to the UDRP system used for generic Top Level Domain Names[further explanation needed], but with certain innovations such as a free mediation service.