Re: domain IN-ARPA.ADDR

I was trying to find a way to check whether an IP address is used by some host without actually probing it. DNS sounds like a good way to go, but I'v heard that domain "IN-ARPA.ADDR" is not well maintained and updated.

Is that true? If so, how un-dependable it could be?

Very. Some ISP's don't maintain rDNS at all. -- Steve Sobol sjsobol@nacs.net (AKA support@nacs.net and abuse@nacs.net) "The world is headed for mutiny/When all we want is unity" --Creed, "One"