![]() More than 50 percent of all possible Class C addresses are still available, but because the address supply is rapidly diminishing, getting a full Class C address is difficult. If you're in the United States, you need to coordinate with your ISP to obtain an IP NET_ID address from ARIN. ARIN assigns the CIDR address blocks, in turn, to ISPs or other regional number authorities, such as Réseaux IP Européens (RIPE-) in Europe and the Asia Pacific Network Information Centre (APNIC-). The size of Internet routing tables was becoming unmanageable, so several years ago ARIN organized unused address space into Classless Inter-Domain Routing (CIDR) address blocks. In the Western Hemisphere and some parts of the African continent, the American Registry for Internet Numbers (ARIN-) is now the IP number authority. InterNIC no longer assigns IP addresses and hasn't done so since about 1997. Today, the process of obtaining addresses and of registering domain names has changed. ![]() When InterNIC assigned your IP address, you owned the address and could keep it even if you changed ISPs. At that time, InterNIC was the place that most people went to for a network identifier (NET_ID) or a domain name in the. However, in 1993, the National Science Foundation (NSF) awarded to Network Solutions Incorporated (NSI-) a 5-year contract that authorized NSI to operate the InterNIC () name-registration service. The Internet Assigned Number Authority (IANA-) was historically the organization that doled out names and addresses. (For more information about domain naming, see "Related Articles in Previous Issues," page 115.) I will help you find resources for obtaining IP numbers and registering your domain name and provide practical information about DNS and its associated tools. ![]() In "A DNS Primer," January 2000, Mark Minasi introduced the fundamentals of DNS. But before you can do so, you need to understand the basics of Internet addressing, find out how to get a Web address, and learn how to register your domain name. ![]() DNS resources and tools to help you get connectedĪs a systems administrator, you might be responsible for connecting your company to the Internet, possibly for the first time.
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