I live in Maryland and caller ID says it is a Baltimore number. This number has been calling every month for about 3 months now. They call late in the afternoon and never leave a voicemail. I keep all my doctors, business and friends numbers in my contacts so if an unknown number doesn't leave a voicemail, I won't call back or answer. I recently inquired about getting auto insurance so I believe it is solicitors. I usually get an uptick of unknown callers after I use any online services requiring a phone number.