It’s not a judicially clear or consistent view that domain name is or not an intellectual property but the United States appellate authority suggests that a domain name is a form of intangible intellectual property.
The internet Corporation for Assigned Names and numbers (ICANN) are charged with overseeing the name and number system of the internet but the right to use a domain name is manage by accredited domain name registrars like www.domaincot.com accredited by ICANN
Domain names are not protected by copyrights but trademark law does protect web addresses or domain names. Companies often go after individual infrigement of trademark than copyrights.