If you want to find out where a Mastodon instance is silenced/suspended, you can use this useful Google search string:
<instance domain> inurl:/about/more
where <instance domain> is the root domain of the instance you are checking.
You will get results from instances that have silenced/suspended the instance you are searching for, minus those with strict robot.txt or obfuscated domain names in the block list.
An informal measure of instance quality.
@halcy Thanks for letting me know.
I guess I would revise that to:
<instance name> inurl:/about mastodon
@Alex geez thanks! Turns out my instance is banned by a few other small instances I've never heard about. Especially weird for one with only one user. Must've been bad radiation.
@Alex masto changed the URL for that to just /about with 4.0