Anyone looking will never find the true identity of the caller. This number is owned by a company in chicago that routes forwarded numbers through their phone switch. This masks the callers true identity. The company is currently tied up in a court case (patent infringement) at the U.S. District Court, Northern District of Illinois, Eastern Division.
However you can complain to the owner of the company:
(Nasdaq: TNDM)
Chief Executive Officer
Rian Wren
One S. Wacker Dr., Ste. 200
Chicago, IL 60606
Phone: (312) 384-8088
E-Mail:
[email protected]
In-State Designated Agent
Richard Monto
One S. Wacker Dr., Ste. 200
Chicago, IL 60606
Phone: (312) 384-8090
E-Mail:
[email protected]
http://www.icc.illinois.gov/utility/profile.aspx?id=2701