Change in Referring Class C Subnets
This alert is based on the number of referring class C subnets, which can affect your ranking signals and quality of backlinks. Changes in Ahrefs Rank are generally associated with a shift in the link popularity score for a domain, and is often compared with Google’s PageRank scoring. This metric compares the authority of your domain with all other websites indexed by Ahrefs.
Increase in Number of Referring Class C Subnets
An increase in your number of class C subnets indicates a potential decrease in overall ranking authority for your website. This is a good indicator that your backlinks are located on a very similar server, and this can decrease how Google views their authority and quality.
Decrease in Referring Class C Subnets
A decrease in your number of class C subnets indicates a potential increase in overall ranking authority for your website. This is a good indicator that your backlinks are not located on a very similar server, and this can improve how Google views their authority and quality.
Let’s hope you have recently garnered new authoritative links to your site that are not on similar referring class C subnets, and you see this number on a steady downward trend. It is important to note that Ahrefs can trigger false positives for this alert if there was a recent index update on their end, which would have an impact on the Ahrefs Rank of all sites in their index. If you see a big jump or drop, you should check to see if Ahref updated their index before freaking out!