Sometime in the wee hours of the night on June 5, much of the Internet switched over to Internet Protocol v6, a change 10 years in the making. The previous version v4 (there was no v5, oddly) is still out there in use. Not everyone has jumped on the v6 bandwagon. The move should increase the number of internet addresses from 4.3 billion to 340 trillion trillion trillion and was first implemented by big business: e.g.,Comcast, Time Warner, Cisco, AT&T.
It that sounds to you like a move to facilitate big business, you may be right. Here are some useful links to help you understand what happened and why.