@netblues Yes spot on. We learned this also in Python programming class. I agree the some URLBlacklists are massive and just eat memory, makes me wonder if they use some hybrid form of Stacks, Queues, or ArrayLists. Shalla list on my Netgate 2100 Max did not have the same issues that the other blacklists are creating, Shallalist was rather large also just not as big as the others. Thanks for the reply happy Easter.