IP Private address ranges

Setting up a private network for your Windows NT workstations? Don’t have time,
or can’t get a registered address range for your network. According to RFC1597, the Internet Assigned
Numbers Authority (IANA) has reserved the following three blocks of the IP
address space your use for private networks:

• 10.0.0.0 – 10.255.255.255
  
• 172.16.0.0 – 172.31.255.255
  
• 192.168.0.0 – 192.168.255.255

Read RFC1597 for background
information including pros/cons of use of private ip addresses.