Mc server?

Moin, why are many minecraft servers hosted in Frankfurt?

Because there's the hub of the European Internet, there are tons of server farms there.

Because there are most data centers there.
Frankfurt is known for having very good connections.

Frankfurt is Germany's data hub. If a server were only hosted from Singapore, for example, your connection in Germany would be totally bad. The servers in Frankfurt are hosted in all games if you play them in Germany. Amsterdam is also an option.

Who is interested in more details:

https://de.m.wikipedia.org/...iki/DE-CIX

There are many data centers in Frankfurt. There's the world's largest internet node (DE-CIX). Since there are generally many servers there, there are also many MC servers.