What is APIPA? If Microsoft Windows computers cannot make contact with a DHCP server to get an IP address, they will self-assign themselves an IP address. These IP addresses will be in this range 169.254.0.1 - 169.254.255.254. And the reason they do this is so that they will still be able to communicate with other computers on the same local network/subnet that also have self-assigned IP addresses. #APIPA