This is the most popular and foremost question when it comes to domain name extension. Many people were really asking that question times every time a subject about domain name and its extensions is tackled. Well, fortunate for them that they are actually left with answers on their hands. However, many of the people today are still not aware of the nature of domain name extension and its types especially those who haven't heard anything about domain names. So speaking of the ICANN that plays a major part in the domain name registrars, it is necessary to know that it has two main responsibilities. One of those is to oversee the Domain Name System or DNS for the purpose of validating the division of the IP Addresses and domain names, verifying that each one is distinct. One of the examples that show this kind of situation involved in the domain name renewal is this one: if you have eleven months remaining on your domain name registration and then you decided to keep your domain name for a very long period of time, it is fact that you can perform a domain name renewal for nine years, but the maximum number of years is ten. com then mirrors the type of organization. Generally, this is known as the "top-level domain name". Speaking of the "top-level domain name", it is very nice to know that some of the common top-level domain names used in the internet comprise the .gov which stands for government agency, . For you to know who owns domain names, you need to type in the name of the domain name and the top level domain name such as .com, .net, .org, .biz and others and then click the search button. It is important to learn that if the domain name is in the whois database, the search results will show the contact information of the domain name holder so you will know who owns domain names. In fact, purchasing a domain name today may be expensive in case that you do not find any that is available. The domain name extension is also that necessary in choosing the right website domain name. You should then be aware of the types of the domain name extensions or top level domain names and also its uses for you to pick up the right one.