@TECHREPORT{ Author = {Mandalari, A. and Lutu, A. and Dhamdhere, A. and Bagnulo, M. and claffy, k.}, Title = {{Tracking the Big NAT across Europe and the U.S.}}, Institution = {Center for Applied Internet Data Analysis (CAIDA)}, Month = {Apr}, Year = {2017}, Keywords = {ipv6 measurement methodology} }