The number traces back to a LANDLINE owned and operated by U.S. TELEPACIFIC CORP., of MONTEBELLO, California.
You can submit a fraud complaint to them via their fraud and abuse email address, or calling their toll-free (Non-Emergency: Toll Fraud, Call Annoyance, Subpoena Compliance and non-emergency law enforcement) number. The toll-free number is available M-F 8 am to 5 pm Pacific time.
Email:
[email protected]
Toll-free: 866-839-8545
Site: http://www.telepacific.com/support/corporate-contacts.asp
And you might even try http://www.ic3.gov/ - it's worth a shot.