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Why military aircraft show up on trackers, or don't

Updated 2026-10-11 · 7 min read

Military aircraft appear on public flight trackers when they broadcast ADS-B or carry a transponder that multilateration can locate. Transports, tankers and trainers flying in civil airspace often do. Aircraft on sensitive missions may legally switch ADS-B off, so many fighters and special missions are not visible.

The rules

US military aircraft fly under the same air traffic control system as everyone else when they are in civil airspace. The FAA's ADS-B rule (14 CFR 91.225) requires equipped aircraft to transmit at all times, but it includes an exception: the FAA can authorize operation without ADS-B Out when an aircraft is on a sensitive government mission for national defense, homeland security, intelligence or law enforcement, and transmitting would compromise operations security or create a safety risk. The Department of Defense and FAA have agreed procedures for this.

In practice that means:

  • Routine flights, such as a cargo flight between bases or a tanker transiting to a refuelling track, usually broadcast like a civil aircraft.
  • Training in restricted areas and military operations areas may be done with ADS-B off. Transponders are often still on for ATC, sometimes squawking 4000.
  • Sensitive missions may fly with no ADS-B at all.

What you commonly see

  • Airlifters: C-17 Globemaster III and C-130J Super Hercules flights, often with callsigns starting "REACH" for Air Mobility Command.
  • Tankers: KC-135R Stratotankers flying orbits or long tracks over the central US and offshore.
  • Patrol and surveillance: Navy P-8A Poseidon flights off the coasts.
  • Trainers: T-38 Talons and other trainers near training bases in Texas, Oklahoma, Mississippi and elsewhere.
  • Helicopters: Army and National Guard UH-60 Black Hawks, plus Coast Guard aircraft.
  • Government: executive transport, Customs and Border Protection, and other agencies.

See who is flying at this moment on military and government now.

How we recognise a military aircraft

No single field says "military." We combine several clues:

  • Address block: each country has a block of 24-bit ICAO addresses. US military aircraft commonly use addresses starting with AE, and some AF.
  • Type: military-only types such as the C-17, KC-135, P-8, H-60 and T-38.
  • Callsign: recognisable prefixes such as REACH, and many tactical callsigns.
  • Behaviour: long orbits, refuelling tracks and formation flights.

Because these are clues, our military list is described as "military and government looking." It can include civil contractors and miss aircraft that use civil-style addresses.

Anonymous and changing addresses

Some military aircraft broadcast without a callsign or registration, or with an address that does not match a public database entry. Some government and civil aircraft use temporary addresses. Trackers show these as "unknown" types or with blank fields. That alone says nothing about the mission.

Where you tend to see them

Military traffic on public maps clusters around a few kinds of places. Airlift hubs such as Dover in Delaware, Travis in California, McGuire-Dix-Lakehurst in New Jersey and Charleston in South Carolina send C-17s and other transports across the country and overseas. Tanker bases such as McConnell in Kansas and Fairchild in Washington put KC-135s and KC-46s on long refuelling tracks. Pilot training bases in Texas, Oklahoma, Mississippi and Arizona generate steady trainer traffic in daylight. Naval air stations along the coasts launch patrol aircraft and helicopters over the water. On a weekday afternoon, the national snapshot usually holds a few dozen to a few hundred aircraft that look military or government, and far fewer at night and on weekends.

A note on interpretation

Seeing a military aircraft orbiting, or a sudden cluster of flights, almost always has a routine explanation: training, exercises, ferry flights, airshows, search and rescue or disaster support. Public trackers show only a partial picture, a few seconds late. We don't speculate about individual missions, and we encourage visitors to treat the data with the same calm.

Related reading

Questions

Can military aircraft turn off ADS-B?

Yes. FAA rules allow aircraft on sensitive government missions to operate without ADS-B Out when transmitting would compromise operations security or safety. Routine military flights in civil airspace usually broadcast normally.

Why do I see military tankers and transports but not fighters?

Tankers and transports often fly routine routes in civil airspace with ADS-B on. Fighters usually train in restricted or military airspace and frequently fly with ADS-B off.