Hi,
You can visit
this link if you want more information about blocked connections.
Know that staff members can't/won't remove your blocked connection (if it starts with a C). There is also no set time for blocked connections. They can vary between 1 minute and months. How long your connection is blocked depends on how many times you were banned before and on how many minecraft accounts there are on your IP.
Next time you have a question create a thread under support. This subforum is for suggestions and feedback. I'm going to ask a staff member to move this thread to support so you don't have to create a new one.
Goodluck and for any other questions feel free to start a conversation with me.
- Dutchy