mastodon.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
The original server operated by the Mastodon gGmbH non-profit

Administered by:

Server stats:

373K
active users

Lu Wilson

One server even has the whole instance banned, so you get even less information.

The banned instance is mastodon.social, which is the first one that users are referred to on joinmastodon.org/servers