their IP addresses & unique c block addresses of the links
links from .gov, .mil, .edu, or .ac.uk domains. Links from these domains are likely rated better in authority type algorithms.
Links Tracker also bolds and autochecks domains that link from 5 or more pages. You can then requery the Yahoo! database and spider deeper than the 1,000 link limit.
Links Tracker uses the Yahoo! API and is limited to 5,000 daily requests.
Links Tracker also links to the Internet Archives, WhoIs Source, and Google cache near each link.
Now features an option to use either Yahoo or MSN.