Who called from 5713365104

I have received two calls from this number, upon mistakenly answering the first time and my phone locking up, I did not answer the second call. I am not sure why my phone locked up, but it would not let me hang up. I ended up powering down my phone. Weird.

Automated call asked if I was there. Responded affirmatively, but when this auto responded, "Is anyone there?" I simply hung up.

CID was Springfield Virginia, left no message.

Did not pick up, as I never answer calls from unknown sources.

Have been getting a call twice a day from this number!  Super irritating!  The calls come early in the morning and late in the evening!  I want it to stop!