NOTICE: I called AT&T trying to get to the bottom of calls / phone numbers on my bill that are totally unfamiliar.  The OUTSOURCED service rep said that they would start tracking calls, yet AT&T did not call me back to confirm the next day, as promised.  I think this has something to do with spoofing and might be dangerous. Calls made are long distance, but brief. PLEASE REPORT THIS NUMBER to the national and your state DO NOT CALL LIST and your ATTORNEY GENERAL!

Note: I usually ignore numbers that do not provide a caller I.D. and/or that I do not recognize.
I answered the phone, saying nothing, today. Heard very airy sound, then they hung up.
I have gathered online tracing tools (free reverse lookups) and two of the best said NO RESULTS FOUND.
One gave me the supposed, general and vague location of ST. LOUIS, with a photo of 9th Street.
ALL of the unfamiliar calls attributed to my phone number (outgoing or incoming) that I do not recognize are seemingly coming from the STL (MO) area. I live in Springfield, Missouri.

Best tools that I have found are pipl.com , spydialer.com , 10digits.com (FREE)