Who called from 9102519393

This number keeps calling me, but when I call it back says it's disconnected

Called several times in the last two days. No response when we answer.  We refuse to answer when this number popes up on caller ID,

Some one called from this number claiming they were trying to sell GM Security systems.
When I called back it says it is disconnected.

Same as above folks. Glad it wasn't important.