Large blocks of IPv4 addresses are no longer available in North America; organizations can either join the wait list or request smaller blocks
It's official: North America out of new IPv4 addresses — But the move to IPv6 picks up speed. — Remember how, a decade ago …
Context & Ripple Effects
This report flagged the end of easy IPv4 in North America months before it became official: by late September, ARIN confirmed its free pool was fully depleted. What followed across the other regional registries turned a technical milestone into an economic one.
In Europe, RIPE hit its own exhaustion in 2019, routing returned addresses through a waitlist rather than open allocation — while governance frictions surfaced elsewhere: an AFRINIC executive resigned amid accusations of selling IPv4 space on the black market, and the Pentagon's decision to pull back 175M addresses handed to a Florida company showed just how valuable legacy blocks had become.
First-order effects
- Organizations requesting addresses from ARIN can no longer receive large blocks — they face a wait list or smaller allocations, raising costs for anyone scaling hosting, cloud, or network infrastructure right now.
Second-order effects
- A secondary market for transferred IPv4 space hardens around registry exhaustion, which is exactly where abuse follows: the AFRINIC allegations show how scarcity converts address allocation into a lucrative, weakly-policed asset trade.
Third-order effects
- If every RIR follows ARIN and RIPE into depletion, IPv4 becomes a permanently rationed asset with price discovery through transfers and returns (the DoD's reclaimed 175M block being a case in point), leaving IPv6 adoption as the only structural release valve — at whatever pace organizations actually migrate.
The trend: IPv4 addresses are shifting from freely allocated registry resources to scarce, priced assets, with each regional registry's exhaustion tightening supply faster than IPv6 adoption absorbs demand.