How do you block calls from magic jack phone service or can you

Hello...I need to block the phone number of a pesky incoming call. Does anyone know how to do this with Magic Jack?:confused:

I want to use the phone jack in my basement to connect my Vonage phone adapter in order to distribute the service to all phone jacks in my house. But I need to convert it to the "main" jack in order for the Vonage signal to be distributed. I was told I should be able to convert this jack to the...

I have a panel that has 2 jacks on it. One jack works just fine, but the other isn't receiving incoming calls. It gets a dial tone, but won't receive calls. Plugging the phone cord into the working jack... Makes the phone work, but I have a Modem connected to that. I've got the line routed...

The wall jack currently has some gray pieces already wired however the wires have disintegrated can I cut this off restrip the wire coming out of the wall and install a regular flush jack. If not how difficult would it be to rewire a wall phone jack?

I've been perusing a bit and I've found out about Selective Call Rejection, and how most phone companies offer an option where you can block numbers by pressing *67 (or simply variations of that number). However, I'm looking for a utility that can do that, rather than a service. Is there any object...