Answer Description
Each octet of an IP must be between 0-255 but the second octet of this IP is 256. The IP is not an APIPA and DHCP would not affect manually setting a static IP. Classes are used to determine the default subnet mask for an IP but you are not required to use it, therefor the class B address can be used with the class A subnet mask.
Wikipedia
An IP address (abbreviation of Internet Protocol address) is an identifier assigned to each computer and other device (e.g., printer, router, mobile device, etc.) connected to a TCP/IP network that is used to locate and identify the node in communications with other nodes on the network.
Version 4 of the Internet Protocol (IPv4) defines an IP address as a 32-bit number. However, because of the growth of the Internet and the depletion of available IPv4 addresses, …
IP address - Wikipedia, the free encyclopedia