Who called from 9513737713

Received call on my cell phone at 5:39 pm.  Did not answer.  Caller did not leave message.

called at 10:10 MST, I answered - no one said a thing???

Have been getting MULTIPLE calls from this number for the last couple of months.. they NEVER answer and when I don answer they never leave a message.... I will be blocking this number.. right now I have contact name as DO NOT ANSWER.

This number keeps calling our do not call number.

When completing a purchase online, this number appeared as my phone number when I entered my credit card info using the auto complete feature. I have this number blocked on my cell phone. Figure that one out. NASA? The Russians?