123 Reg is a British domain registrar and web hosting company founded in 2000 and now under the ultimate ownership of GoDaddy.

The company claims to be the UK's largest[2] accredited[3] domain registrar and provides Internet services to small- and medium-sized business.

[7] In 2004, Host Europe Group was bought by Pipex Communications for £31.2m[9] and 123 Reg became the UK's largest domain registrar, according to the company's parent.

[10] On 16 April 2016, 123 Reg admitted a major deletion of a large number of virtual private servers (VPSs) caused by an error during what should have been routine maintenance.

[14] The event deleted hundreds of websites, with users losing sites and access to data on their VPS service.