LSN is the ideal choice to extend the IPv4 address space. Additionally, NAT444 impacts to application performance must be communicated to end-users and application developers. Developers should make their applications NAT444 interoperable. Additionally, service providers should encourage customers to migrate to IPv6 [13, 22]. It is the best practice to deploy NAT444 in chunk of 10 - 20% of customers to keep failure domains reasonably small.