The minimum character length for a Domain Name is one character, excluding the “.tv” or “.cc” extension. The maximum character length for a Domain Name is 63 characters excluding the “.tv” or “.cc” extension. A Domain Name must not start with a dash “-” or dot “.” and must not start with the following sequence: “alphanumeric_alphanumeric_dash (“-“)_dash (“-”)”.
Each character in the Domain Name, excluding the dots (“.”)s must be a letter or digit or dash (“-”). The last character must be a digit or a letter. It cannot be a dash (“-”).
Domain specific restrictions
Co.uk, me.uk, org.uk: These domains are perfect for all UK uses, from individuals to non-profit organisations. More information regarding the registration and use of these domains can be found on Nominet’s Website.
Mobi: This domain extension was created for the mobile phone market. All websites using a .mobi domain name should be “mobile friendly” and confirm to the .mobi guidelines located at: http://dotmobi.mobi/. More information is also available in our article: What are the rules for registering .mobi domain names?
Ltd.uk, plc.uk: ltd.uk and plc.uk domains are restricted to private and public limited companies, respectively. More information can be found in our article: How do I register ltd.uk and plc.uk domain names?
Gov.uk, ac.uk: Government bodies can register gov.uk domains and further and higher education institutions can register ac.uk domain names through Janet, the UK’s education and research network. More information can be found in our article: How do I register .gov.uk and .ac.uk domain names?
EU: Registrant must be active in an EU country – the European Union website has a list of EU member countries. More information can be found in our article: What are the .eu domain name specifications?
gTLD’s:The registration agreement for gTLD domains can be found on OpenSRS’ website.
nTLD’s:The registration agreement for nTLD domains can be found on the ICANN website.