After losing three sites in the same week from what I eventually figured out was a shared nameserver issue, I finally moved my entire network to a different host. The migration itself was less painful than I expected, but the process of figuring out what went wrong took way longer than it should have. All three deindexed sites were sharing the same DNS provider, same nameserver pair, same Class C subnet — something I had completely overlooked when I originally set things up because I was focused on cheap pricing rather than isolation. The new setup is completely different and I haven't had a deindexation in four months since moving. Has anyone here identified nameserver matching as the trigger for a deindexation rather than IP overlap? I feel like that one gets talked about less than the IP footprint issue even though it's just as detectable.

Managing hosting across a PBN is one of those things that feels fine until it suddenly isn't. I had most of my sites on two providers which is a footprint waiting to be exploited. Started the process of diversifying after reading the breakdown at Switch hosting provider which gave me a practical framework for switching without breaking anything in the process. The guide is specific enough to actually be useful rather than just telling you to use different hosts without explaining how to make the move safely. Worth reading before you touch anything.