I have received a call from that number.  I get so many fake calls, I don't pick up the phone for numbers I don't know, and if no message is left, is wasn't worth the attention paid to it.  Odd isn't it that the NSA, CIA, Army Intel, FBI wants to track all phone calls, yet this garbage continues.  Apparently, harassing Americans with phony phone calls is acceptable.  So much for "law enforcement."