Hi, all, By popular request, I've restored the DNS calculator function as an operational service. See: http://www.isi.edu/touch/tools/dns-calc.html (this was designed for a Sigcomm OO session, but it's been used several places as an example why the DNS should NOT be anything more than a mapping service) Joe PS - if you do happen to use it as an example, please do drop me a note; I'd be very glad to track that info. and/or include a pointer to any classes that use it.