The sudden movement came after a large IPv4 reclamation, including a /15 (131k IPs) and multiple /16–/22 blocks that ARIN recovered and reissued.
It’s the first time in years the list has advanced this quickly — showing that ARIN is actively reclaiming and redistributing unused IPv4 to organizations waiting for space.

At the same time, ARIN continues to emphasize the need to transition to IPv6, since reclaimed IPv4 space can only delay full exhaustion for a short time.