"We are in the final stage of depletion of IPv4," Curran said. "If you request address space from ARIN we will look at the immediate need for three months and issue address space to cover that period."

Existing transfer policies allow up to 12-months worth of address space to be transferred from one entity to another, he said.

In general, the goal is to ensure that the remaining IPv4 addresses are allocated as fairly as possible and to prevent organizations from using money to purchase large address blocks for which they have no immediate use, he said.

In the event a transfer violates policy, ARIN can revoke the addresses and assign it to others that need it, Curran said.

"We have revoked resources before and there certainly is enough demand for IPv4 resources right now," that there won't be any problem reassigning it to others, he said.