rainofka says:

well u could do u have the resources and cycles for this…. nslookup is a defunct tool,,, i would use the host command,, ur best bet would be to work out a way to recursively query dns from root down,, actually ur best bet would be to iterate through every logical IP address in a loop,,, doing reverse dns queries for each $IP in that loop (friggin huge loop),,,u would then for intergrity (&& every site will not have a reverse entry so this is not even accurate) need to probably actively query a dns server or run a whois on the sites,,, u will need to format this data in some way like use awk or cut,, or most likely both and this will be such a wopping amount of data ur only chance of reviewing it logically would be to have it stored to a database,,, this all is actually very easy one thing to note is this type query on root dns will certainly bring government authority attention,,, another thing u can do is crawl the internet,,, or even crawl the crawlers,,, u can maybe write a perl script or bash that crawls googles search pages,,, and maybe uses some regex to produce websites allinurl:.`com|net|et… ,, this even u will need to watch as u dont want to be crawling google to much either,,, BUT heres a really cool site i know about;; this is rumored to contain a copy of almost every site that ever existed IN THE PAST and no longer exists try it out http://www.archive.org/index.php