Understand that you can't track a phone's exact location. Since it is impossible to trace a phone's exact location, avoid using third-party apps or services which claim to be able to track phone numbers. At best, these services don't work, and they will often scam you or steal your information.

Find My Device is a Google app to track a cell phone's location for free. Most tracker apps powered by Google are designed for locating lost phones but can also track location with pinpoint accuracy. It works if the target Android device has logged into a Google account and enabled its Location permission.