Calls randomly and when you answer there is music playing.  If you call back, it rings once and then goes silent.

yes i call back and is silent need to stop calling just got this know .

Keeps calling my girlfriend and she says she dont know who it is.

Calls 10 times a day

Constant calls and when you call back only music and asked to leave a message. After some research I found that this number belongs to a Debt Collection Agency and it is a spoofed number. Its an invalid number in order to mess with your caller ID. It belongs to  MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Line Type Landline
City MANVEL  
State TX
Block it on your phone! Rude Company!!!!!!!!!!!