According to some experts, this is one of the toughest domain name value factors that should be considered. For example, Chat.com is much worthy than Chats.com, or the domain name BuyTickets.com is most likely worth than BuyTicket.com. Outside from such considerations in determining the domain name value, there are still others that deserved to be considered. In terms of the a country by country basis since most countries now have a matching top level domain name, under which domain names are sold, the most common domain name extensions are based on two characters ISO country codes. In terms of a country by country basis, the common domain name extensions are based on the two-character ISO country codes and this is for the main reason that many countries offered these kinds of domain name extensions. 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. Such group then coordinates the distribution and mapping with each of the registry. Secondly, the ICANN is responsible of accrediting the domain name registrars. And if the requested domain name is already taken, you will be given a chance to view the domain record, but if the domain name is available, then you have the chance to register the name or look up for another name. Domain Name Lookup Services at AllWhoIs.com Another notable resource where you can perform a domain name lookup is the AllWhoIs. It is just important to note some things about it since it is a common necessity for the domain name holders to change their registered domain name information. According to some experts, when you register a domain name, you really need to specify your Domain Name Server or DNS information. However, there are some instances that you need to change such registered DNS information for certain purposes. Most of the domain names registered today end in the above top level domains, of which .com is the most well-known. Before a domain name registration, you should refresh your mind that a domain name cannot start or end with a hyphen, and no space is permitted before, between, and after your domain. And also you can have characters in your domain name registration for up to 67 characters, however, it is noted that the shorter the domain name, the better.