It is one of the most common questions about phone location, and the honest answer is a satisfying mostly no, with interesting footnotes. A phone that is genuinely powered down has no active radios, so it is not reporting to satellites, towers, or anyone else. There is nothing live to follow.
The footnotes are where it gets nuanced. The last thing a phone did before dying was talk to a cell tower, so its last known location may exist in network or app records, a memory, not a live signal. Some newer phones also keep a low-power chip alive for features like offline finding, letting a lost handset whisper its position to passing devices for a while even when the screen is dark. That is a deliberate, opt-in feature working as designed, not a secret backdoor.
What about the thriller trope of remotely switching a phone back on to track it? For an ordinary user, no. It would require deep, privileged access to the specific device, the kind associated with sophisticated targeted operations, not something available to a stranger, an app, or a website. If your threat model genuinely includes actors like that, the answer is expert help, not a web tool.
The everyday takeaway is reassuring. A powered-off phone is, for practical purposes, off the grid, and no service can conjure a live position for a number you type in whether the target phone is on, off, or at the bottom of a lake. Real tracking, as our can-a-satellite-find-a-phone piece explains, needs the device to actively participate.
Which is the whole joke here. Live Sat Tracker will cheerfully locate a switched-off phone, a fictional phone, or a phone number you invented on the spot, because it is theatre and nothing is truly being found. See how the trace is faked, then enjoy telling a friend their powered-down phone was spotted from orbit.