CIS Home > Networking > IP Number IP Number Each machine connected to the network must have a unique Internet Protocol (IP) address in WHOI's network.  WHOI has a class B range of Internet addresses (128.128.XXX.XXX), which provides us 65,534 possible IP addresses. For efficient addressing, switching and routing within WHOI, these addresses are broken down into roughly fifty subnets and virtual local area networks (VLANS), generally grouped by facility and/or working groups.  WHOI IP addresses can be used for connections to the WHOI network only. Each host (machine) on WHOInet has a unique IP address and DNS host name. Hosts are registered through WHOI Netreg. Most hosts can use DHCP (Dynamic Host Configuration Protocol) to obtain their IP addresses without manual configuration.