On a related note, would anyone in the community be interested in an inexpensive service that differentiates dynamic from static IPs? Dynamic IPs would be accompanied by an estimate of lease duration.
I wouldn't want this to exist because it discriminates my dynamic-looking IP address from server IP addresses (even though mine is statically assigned to my Internet subscription) and I have enough trouble hosting things at home already.
But I understand that's not really an argument: you might say you don't want nukes to exist because they hurt people. I just wanted to mention it.
That said, maybe. Usually an rdns lookup does the trick already though (a4-8e-ef-78.dynamic.ziggo.nl or cpe-12-34-56-78.rr.com or 80-100-131-150.adsl.xs4all.nl is clear enough).
Yeah rDNS is helpful, but as you pointed out with your home IP, many dynamic IPs (those that are rotated by an ISP) are actually granted very long leases. The service I'm proposing would make an additional effort to estimate the duration of dynamic leases.
