I recently assisted a North American client with an agreement for the purchase of more than 15,000 Internet addresses. The addresses are unused and valid on networks employing Internet Protocol version 4 (IPv4). They were originally assigned to the seller by a predecessor to the American Registry for Internet Numbers (ARIN). This open-market approach is a response to the shrinking pool of available IPv4 addresses. Internet Protocol version 4 (IPv4) routes most traffic on the