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"Last night I was notified by Jim from We Build Pages that they have developed a useful, and I find, interesting, tool named C Class Backlink Analyzer Tool.  You basically need to plug in a domain name and wait about 3 minutes for it to run.It breaks down the count of links you have by C class and gives you the specific domain names that link to you.  Then at the end of the report, it summarizes its findings.  For this specific site, here is the summary.Results Summary\nThe first 1000 backlinks found come from\n     223 unique domain names (2 of which are invalid),\n     177 unique IP addresses, and\n     170 unique C classes.The ratio of unique domain names to number of backlinks is 223 to 1000, or 22.30%.\nThe ratio of unique IP addresses to number of backlinks is 177 to 1000, or 17.70%.\nThe ratio of unique C classes to number of backlinks is 170 to 1000, or 17.00%."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/001724.html>