A domain name is the part of a web address that links to the Internet Protocol address (IP address) of a specific website. For example, the domain name at the web address "www.zi-zheng.com" is "zi-zheng.com". You register the domain name with an accredited domain name registrar, not through the USPTO. A trademark identifies goods or services as coming from a specific source. Use of a domain name solely as part of a web address does not qualify as a trademark use of the source, but prominent uses other than a web address may qualify as trademark use. Registering a domain name with a domain registrar does not give you any trademark rights. For example, even if you register a trademark using a domain name, you may be required to give it up if it infringes on someone else's trademark rights. Similarly, your use of a trade name does not necessarily qualify as a trademark, although other uses of your trade name as a source of goods or services may be deemed both a trade name and a trademark. Many states and local jurisdictions register a business name as part of your application to obtain a certificate as a business or as an assumed name.