IPv4 address exhaustion is the depletion of the pool of unallocated Internet Protocol Version 4 (IPv4) addresses, which has been anticipated since the late 1980s.
IPv4 address exhaustion refers to the exhaustion of unallocated Internet Protocol Version 4 (IPv4) addresses which are free and can be assigned for use on the internet. IPv4 exhaustion has been anticipated since the late 1980s.