There is no reasonable expectation of privacy in IP addresses, but planting software on a computer to cause it to transmit its address is “unquestionably a search.” Recognizing the split of authority, Rule 41 was violated, but the court declines to suppress because of the good faith exception. United States v. Torres\, 2016 U.S. Dist. LEXIS 122086 (W.D.Tex. Sept. 9, 2016)
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h/t, Joe Cadillic