Use a live flight tracker to see the plane's call sign, airline, and destination

The fastest way to find out what plane is overhead is to open a live flight tracker on your phone or computer. These websites and apps show real-time radar data of aircraft in the air, updated every few seconds. You enter your location or zoom to your area on a map, and you see every plane currently flying over it with its call sign, altitude, speed, and where it is headed.

The most widely used free trackers are FlightRadar24 (flightradar24.com), ADS-B Exchange (adsbexchange.com), and Flightaware (flightaware.com). All three work on desktop and mobile browsers, and FlightRadar24 and Flightaware also have free apps. Open the map, zoom to your address or city, and look for the aircraft symbol closest to your location. Click on it to see the plane's details: its registration number, the airline operating it, what type of aircraft it is, and its destination airport.

Key Takeaways

  • FlightRadar24, ADS-B Exchange, and Flightaware are free websites that show every plane in the air right now with its call sign, altitude, and destination.
  • The plane's call sign (a code like "UAL456") tells you the airline and flight number; the registration number (like "N12345") identifies the specific aircraft.
  • Military planes, helicopters, and some private aircraft may not appear on civilian trackers because they do not broadcast their location publicly.
  • If a plane is very high or very far away, it may take 30 seconds to a minute to appear on the tracker after you see or hear it.

What the plane's call sign and registration number mean

When you click on a plane in the tracker, you will see two different codes. The call sign (also called the flight number) looks like "DAL227" or "SWA1840"—a two- or three-letter airline code followed by numbers. This tells you which airline is operating the flight and what flight number it is. You can look up that flight number on the airline's website to see where it came from and where it is going.

The registration number (also called the tail number or N-number) looks like "N456AB" and is painted on the tail of the aircraft. This is the plane's permanent identifier, like a license plate. It stays with that physical aircraft for its entire life. If you want to know the plane's age, manufacturer, or history, you can search the registration number on the FAA's aircraft registry at n-number.com or on FlightRadar24 itself.

Why some planes do not show up on live trackers

Not every plane you see or hear will appear on a civilian flight tracker. Military aircraft—fighter jets, transport planes, and helicopters—usually do not broadcast their location to the public. The same is true for some government and law enforcement aircraft, and for many private planes and business jets, which can opt out of public tracking.

If you hear a loud jet or helicopter but cannot find it on the tracker, it is likely military or law enforcement. If you see a small plane that does not show up, it may be a private aircraft flying under visual flight rules (VFR) at low altitude, which some trackers do not capture reliably. In those cases, you can note the time, direction, and any markings you see, and post to online aviation communities like Reddit's r/whatsthatplane, where enthusiasts can often identify aircraft from descriptions.

How to read altitude and speed on the tracker

When you click on a plane, the tracker shows its altitude in feet and its speed in knots (nautical miles per hour). A commercial airliner at cruising altitude is typically between 30,000 and 43,000 feet and traveling at 450 to 500 knots. A plane that is climbing or descending will show a lower altitude and may appear to move more slowly on the map because it is not covering as much horizontal distance.

If you see a plane moving very slowly or hovering, it is often circling while waiting to land—this is called a holding pattern. Planes do this when the airport is busy or when weather is delaying arrivals. The tracker will show the plane making repeated loops in the same area, usually at a lower altitude than cruise.

Why a plane might be flying over your area repeatedly

If you notice the same plane or the same flight number passing over your house at the same time each day, it is almost certainly a scheduled commercial flight on a regular route. Airlines operate the same flights on the same schedule every day, so the same aircraft may fly over your location at the same time each morning or evening.

If you see a plane circling your area for an extended period, it could be holding for landing, conducting a training flight, or waiting for weather to clear at its destination. Occasionally, planes circle because of a mechanical issue and the crew is burning fuel before attempting an emergency landing. If you are concerned about an unusual pattern, you can note the time and call sign and check local news or aviation forums—other people in your area will likely have noticed it too.

Trackers that work best for different aircraft types

FlightRadar24 has the largest network of ground receivers and shows the most commercial traffic. It is the easiest to use for identifying a plane you just heard or saw. ADS-B Exchange shows military and government aircraft that other trackers filter out, so if you are trying to identify a military plane, this is the better choice. Flightaware is owned by aviation data company Embraer and integrates flight information from airlines directly, so it often has the most accurate gate and delay information.

For very small private planes or older aircraft, none of these trackers may have complete coverage. In those cases, the aircraft may be too small or too old to have modern tracking equipment, or it may be flying below the altitude where ground receivers can pick up its signal.

What to do if you cannot find the plane on any tracker

If you heard or saw a plane but cannot find it on any tracker, try these steps. First, check the time: if more than a minute or two has passed, the plane may have already moved out of your area or landed. Second, zoom out on the map to see a wider area—the plane might be slightly farther away than you thought. Third, if it was a helicopter or small plane, try ADS-B Exchange, which shows more of those aircraft than other trackers.

If you still cannot identify it, post a description to r/whatsthatplane on Reddit or to an aviation forum. Include the time you saw it, the direction it was flying, what it looked like (size, color, any markings), and whether it was loud or quiet. Aviation enthusiasts can often identify aircraft from those details alone. You can also contact your local airport directly if the plane seemed unusual or concerning—they can tell you if it was a scheduled flight or something else.

Frequently Asked Questions

Can I track a specific plane if I know its tail number?

Yes. Enter the tail number (N-number) into the search box on FlightRadar24 or Flightaware, and the tracker will show you that plane's current location, altitude, and destination. You can also set up alerts so you are notified when that specific aircraft takes off or lands.

Why does the plane on the tracker look like it is in a different location than where I hear it?

The tracker updates every few seconds, but there is usually a 30-second to 2-minute delay between what the tracker shows and the plane's actual real-time position. If the plane is moving fast at high altitude, it can cover several miles in that time. Also, sound travels slower than light, so you hear the plane after you see it on the tracker.

Is it legal to track planes with these websites?

Yes. FlightRadar24, ADS-B Exchange, and Flightaware use publicly broadcast data that aircraft transmit. This data is legal to receive and display. Military and government aircraft that do not want to be tracked straightforward do not broadcast their location, so they will not appear on civilian trackers.

What does it mean if a plane is squawking 7700?

A squawk code is a four-digit number that a plane's transponder broadcasts to air traffic control. The code 7700 is an emergency code that pilots use to signal a serious problem—engine failure, medical emergency, or other urgent situation. If you see 7700 on a tracker, the plane is declaring an emergency and will be given priority landing.

Can I find out who owns a private plane?

The FAA's aircraft registry (at n-number.com) shows the registered owner of any aircraft by its tail number. For private planes, the owner is often a company or trust rather than a person's name. Some owners use shell companies to keep their identity private, so the registry may not show the actual owner.