Internet Domain Registrar and Web Hosting ________________________________________________________________________

A Registrar is an organization or company that is either authorized by ICANN (the Internet Corporation for Assigned Names & Numbers, an organization dedicated to Internet governance) to provide registration services for the .com, .net, .org, .biz and .info global top-level domain names, or is authorized by its respective government to register domain names within a specific TLD (domain name extension). A registrar must also be authorized by the Registry of a Top Level Domain to act as an agent of the registry to process domain name registrations, where the agent is not a reseller. The registrar is also responsible for creating and maintaining a WHOIS database for its customers.

Few rules for register a "dot DOM" (.COM, .NET, .ORG) domain name:

The Registry assign the domain names to the registrants, following the chronological order of the requests; it's very important to complete the Netregister's online forms for register quickly a domain
May be registered by private individuals and companies around the world
An unlimited number of domains may be registered by the same Registrant (Owner of the domain)
Certain domain names are reserved
A domain name cannot be booked
The registration procedures ends only when the domain it is uploaded in the database of domain names (WhoIs database), which is called the Registry of the Assigned Names (RAN)
To name your domain you can use any letter, numbers between 0 and 9, and the symbol "-" (hyphen)
The name can neither start nor end with the character "-" (hyphen)
Minimum domain name length: 3 letters (excluding the extension)
Maximum domain name length: 63 letters (excluding extension)
There is no difference between small and capital letters

For further information, all documents are available at the following links:

Rules for the assignment of a dot COM domain name