Today, like so many other days, part of a well-known cliché has been substituted with a piece of geek culture.
The cliché in this case is the “killer calling from inside the house”, based off of the 1979 film When a Stranger Calls. Except instead of the killer’s phone calls being traced to inside the house, it is his IP address that is traced to the 192.168/16 block - the block generally reserved for the local (e.g. household) network.