Your question is often asked on 800 notes. The problem is due to caller ID spoofing (faking) your caller could be anyone anywhere in the world. Criminals use high speed internet, VOIP, computers, and a few dollars in software. Always a good idea never to take, and especially call back, unknown numbers. Area code 607 is the southern New York State. Know anyone there? No? Really that's all you need to know about this call.
I've been called by this "Autism Spectrum" now for the past three days on all different area codes and numbers. I especially was annoyed with an 8:13 AM call this morning. I work nights and don't need this.