What is the numeric range for the first octet of a class E IPv4 address?

Class E IPv4 addresses are designated for experimental purposes and are defined in the IPv4 address space. The classification of IPv4 addresses is based on the first octet, which determines the class of the address.

For Class E, the numeric range of the first octet is from 240 to 255. This range is specifically reserved for future use and experimental purposes, and it is not typically assigned for general use in networking.

Understanding the ranges of different classes is vital for network engineers. Class A addresses range from 0 to 127, Class B from 128 to 191, Class C from 192 to 223, and Class D is used for multicast addresses ranging from 224 to 239. This classification is foundational for grasping how IP addressing works and its structural hierarchy.