Greetings,
I'm looking for a tool or way that can search DNS records to find "words" within or included in registered domain names.

(preface) I am adamantly against spam. I run my business abiding by the laws and rules of honest intention. I spend many hours securing SEO/SEM tactics to keep my product line in a good position with Google, Yahoo, MSN, etc...

(explanation) The desire for such a tool is to individually contact an appropriate web site with the domains returned from "requested DNS search" so that I can work with them on a link exchange or affiliate basis.

(example) "flashflight.com" is my baby where we sell our products. I have a tremendous following in the Ultimate Frisbee world. If I could find a list of all pertinent domains using the word "ultimate" and "frisbee", I would have a wonderful starting point to begin building a relative linking network by contacting the admin and inquiring about this tactic.

Thanks in advance for reading and any suggestions. (I really enjoy this forum as it is filled with competent responses. A few of the posts I wonder about!)

Kindly,
Jeff

for free you can use netcrafts SearchDNS (http://searchdns.netcraft.com/?host) which gives 500 results only and the good thing it gives almost all tlds available too

the other hard way yet free is to dig the zonefiles for each registry and look for keyword inside them (needs access to the zonefile for each registry and kinda long and hard to get)