Who called from 8642118439

I received 3 calls in a matter of hours from this number. My mother and I share a phone plan, and this number called all 3 numbers attached to the plan. Not sure if that has anything to do with it.

Received a call from this number and once answered, they were silent for a few seconds before hanging up.

Called 3 times back to back answered 3rd time and just silence on the other end

No message, says it's disconnected on callback.

Missed a call from this number. I called back, got w wierd busy tone and my phone screen said Invalid Number