Who called from 2544334554

Got a call, no msg, not recognized/not answered.

Called 10-12-15 at 8:23pm EDT.  Did not answer.  Did not leave a message.  Came here for some history.

Got a call. I answered and they hung up before speaking

Called my cellphone.  I didn't answer.  Assumed this call was related to *many* other scam/spam calls I've gotten in the last two (?) weeks.

Got a call. I answered and they hung up before speaking.
I called back and got a pre-recorded announcement: "the mobile device you have called has been turned off or is outside of our calling area."
I called again, the phone stopped ringing and there was a faint snow sound for about 30 seconds and then the call was disconnected.