IP address: network portion
Network addresses are managed by an organization in Norfolk, Virginia, recognized as InterNIC.
InterNIC has been contracted by the National Science Foundation to manage the Internet addresses
and domains. Network addresses are distributed to organizations that are in turn responsible for
making sure all attached devices or hosts on the network are properly numbered. For more
information about the network portion of an IP address, see
IP address structure and class
and
Subnets
in this section.