Domain names are hostnames that provide more easily memorable names to stand in for numeric IP addresses. They allow for any service to move to a different location in the topology of the Internet (or another internet), which would then have a different IP address. Each string of letters, digits and hyphens between the dots is called a label in the parlance of the domain name system (DNS). Valid labels are subject to certain rules, which have relaxed over the course of time. Originally labels must start with a letter, and end with a letter or digit; any intervening characters may be letters, digits, or hyphens. Labels must be between 1 and 63 characters long (inclusive). Letters are ASCII A–Z and a–z; domain names are compared case-insensitively. Later it became permissible for labels to commence with a digit (but not for domain names to be entirely numeric), and for labels to contain internal underscores, but support for such domain names is uneven. These are the rules imposed by the way names are looked up ("resolved") by DNS. Some top level domains (see below) impose more rules, such as a longer minimum length, on some labels. Fully qualified domain names (FQDNs) are sometimes written with a final dot. gTLDs (Generic Top Level Domains)
.COM	.COM domain names are used to host Commercial web sites.
.NET	.NET for Network organisations.
	.ORG the home of the noncommercial community on the Internet! It's the place where people build Web sites devoted to a dazzling array of topics, including not-for-profit activities, arts and culture, science, personal projects, education, politics, religion, community, and more.
	.BIZ Domain Names is targeted at business who would like to create a unique web-presence. The Internet domain that caters exclusively to the needs of companies large and small around the world.
	.INFO names are your opportunity to reach a worldwide audience with information about you, your products, and your ideas. Intuitive, easy to use, and universally recognized.
	Get FirstName@LastName.Name. Let your .NAME speak for itself. Forward your .NAME email to any of your existing email accounts. Your .NAME domain is the best way to express yourself online.
Premium Multimedia Domains
	.FM & .AM are perfect for radio broadcasting, Internet-Only Stations, and broadcast service providers. With an .FM or .AM Internet domain name you can have an easy to remember name than is catchy... A Great Sounding Web Address ends in dotFM® & dotAM®!
	Here is the solution to finding a unique Internet Presence for your broadcasting or television services. .TV, the country code Top-Level-Domain of the small Pacific Island nation Tuvalu, symbolizes an Internet-Address related to the television industry.
Country Top Level Domains (ccTLD)
	.US, the official country code Top-Level-Domain of the United States, is "AMERICA'S INTERNET ADDRESS" where citizens, businesses, organizations and government agencies establish unique, memorable American identities online.
	.EU will be introduced as the future Top-Level-Domain of the European Union. It is not intended as a replacement for the ccTLDs, such as .DE, .FR, .AT, etc., but is considered as an identification with the European Community which will establish itself as the counterpart to the meanwhile unspecifically utilized .COM. The European Registry for Internet Domains is delegated as the Registry-Operator for the European Top-Level-Domain dotEU.
	.CN is the official country code of China. If your business wants to succeed in China, .CN is the place to get started! As the next frontier of global e-business, .CN presents businesses and organizations everywhere with an unprecedented opportunity for success and growth in China. Now is an ideal time for companies to begin making inroads into the Chinese marketplace.
	.JP is the official Top-level domain for Japan. With a .JP Domain your business can; Develop a presence in Japan, develop Japanese consumer confidence and trust, Get more qualified Japanese leads, Help improve Japanese search engine results and Achieve greater success in the Japanese market. Protect your companies domain in the world's second largest economy.
	.TW: BRINGING THE WORLD TO TAIWAN'S DOORSTEP. If your business wants to succeed in Taiwan, .TW is the place to get started! The Taiwan marketplace is one of the most dynamic commercial centers in the world today-and your business or organization can gain entry with a .TW name. Businesses and organizations everywhere can now purchase third-level .TW names (for example, www.mycompany.com.tw) on a first-come, first-served basis.
	.SG is the Top-Level-Domain for Singapore. .SG accepts registrations for 3rd level domain names, you can register www.yousite.com.sg. The Singapore Network Information Centre Pte Ltd (SGNIC) is the official registry for .SG .COM.SG domains can only be registered by Companies/Organizations.
	.DE is the Top-Level-Domain for Germany (Deutschland). Of all country codes .DE is the most popular top level domain world-wide and overall it takes second place only to COM. The number of Internet domains with the ending .DE approaches the six million mark. Residence/branch in Germany as "admin-c" is required for .DE domains.
	.SE - .se dom?namn - Is the official Domain ending (TLD) of Sweden. NIC.SE has liberalized the registration rules and guidelines for .SE domains, opening up to international registrations. Enterprises and organizations who would like to maintain or develop a business relation to the Swedish market need a .SE domain.
	Rejestracja Domen .pl ccTLD - .PL is the Top-Level Domain for Poland. Enterprises and organizations who would like to maintain or develop a business relation to the Polish market need a .PL domain. The Research and Academic Computer Network (NASK) is the official registry for the ccTLD .PL
Boutique Domain Names
	.LA is the new domain name for Los Angeles, Louisiana and Latin America! Any business, organization, or individual interested in taking advantage of this vast marketing opportunity can now easily register this specific domain! A .LA Web Address lets people know not just who you are, but where you are! Get the domain name for Los Angeles, Louisiana or Latin America!
	.MD is the only internet Top Level Domain (TLD) intuitively linked to the healthcare industry. .MD is an effective branding tool for healthcare professionals, businesses and organizations. .MD provides an opportunity for the healthcare community to differentiate itself on the Internet.
	.BZ "A shorter way to business!" - The .bz domain is an unrestricted and largely untapped domain name space on the Internet and therefore an ideal opportunity for businesses and consumers that have been unable to register their desired name in other domains.
	.CC - The Universal Internet Address is the ccTLD of Cocos (Keeling) Islands and a popular alternative to dot-com on the internet. If you missed out on the .com revolution, don't worry, .cc is here for you. It's unique, easy to remember and works exactly like a .com address - great for your business or personal Web site.
	.WS (WebSite) is the Internet-address known for WebSites. Officially it is the ccTLD of Western Samoa being administered by a Global Domains International.
	.NU is a hot domain for Everyone. Young Internet users and small companies everywhere are adopting the .nu domain. These are Internet users who want to stand out from the crowd.
	.TK is Dividing Domains Differently. The domain is from Tokelau Islands. One of Dot TK's primary objectives is to continue to build its user base of individuals and small businesses interested in Tokelau, its customs, its culture and its beauty. The goal of the Tokelau Internet Project is to provide the communications and educational technologies needed on the island.
	.AC is the perfect Top-Level-Domain for anyone within the academic and/or higher education field. This TLD provides those in the AC field the opportunity to stand out from the crowd. But AC is not limited to the AC field, anyone can get a .AC domain. AC is ccTLD of Ascension Island.
	.SH is the Internet-address known for Small Office/Home Office (SOHO) - or SH for short. SH is the Ideal domain for Small/Home Businesses. Plus .SH works with Internationalized Domain Names (IDNs) meaning your can now get your domain in your language. .SH is the ccTLD of Saint Helena.
	The .IO name space is highly sought after and now this very special Top Level Domain can belong to you. "Power up your web site with an .IO domain name!" .IO is the ccTLD of the British Indian Ocean Territory.