--- C-Mack.McBride@charter.com wrote: From: "McBride, Mack" <C-Mack.McBride@charter.com> If you are managing more than a thousand IPs allocations spreadsheets are not manageable for IPv4. ----------------------------------------- --------------------------------- I managed a /15, two /16s and several /24s (so, well over a quarter million IPs) on a spreadsheet for years. So, that's an 'it depends' answer. ---------------------------------- --- C-Mack.McBride@charter.com wrote: From: "McBride, Mack" <C-Mack.McBride@charter.com> Allocations, not IPs. And yes if they are reasonably static an excel spreadsheet can go higher. --------------------------------- Yes, an "it depends" answer. But I was well in excess of 1000 IPs. Sure everyone's correct on the limits in a rapidly growing company with lots of churn, but I was responding to the "If you are managing more than a thousand IPs allocations spreadsheets are not manageable for IPv4" comment. scott