AWS owns roughly $2B worth of IPv4 addresses
gist.github.com
gist.github.com
How much do Elastic IPs cost? Elastic IPs are totally free, as long as they are being used by an instance. However, Amazon will charge you $0.01/hr for each EIP that you reserve and do not use. You will be charged if you ever remap an EIP more than 100 times in a month.