It did in that very specific circumstance where the police were searching for...they had an IP address. They understood that the individual in that case, Mr. Spencer, had been uploading and downloading child pornography. In that circumstance they had the IP address, but they didn't know his identity. In that circumstance they went forward and asked the telecommunications provider to provide the basic subscriber information. Through the court process they came back and said that collection of information, the basic subscriber information and that IP address combined, amounted to what would be a search under the Constitution. In that circumstance they didn't have common law authority that they were relying on to obtain that information. They required a warrant in that specific circumstance because his Internet browsing history and other things related to his IP address provided them with intimate biographical details that went beyond the needs of that circumstance. A warrant in that specific circumstance was needed. They could not rely on common law authority as they had tried to.
On February 5th, 2015. See this statement in context.