Missed a call from this number the morning of 12-20-16. No message was left. The area code is Austin, TX; I grew up there, but I don't recognize this number. Search led me here, so I'm 99% sure it's spam.
They called my cell phone, and I accidentally touched the screen and answered without realizing it. A man said "Hi, is Rachel there?" When I didn't say anything, he asked the same question again in exactly the same way. I didn't say anything, and he hung up. I don't know any Rachel.