What is the squawk code 7777?

Some squawk codes are reserved, such as 7700 (emergency), 7600 (communication failure), 7500 (hijacking), 1202 (glider), 1200 (VFR), etc. One of these, 7777, is apparently used for military interception. What does this mean in the United States?



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Setting a squawk of 7700 on the transponder shows that the aircraft is presently dealing with an emergency. The pilot can set it proactively or at air traffic control's request following a 'pan' or 'mayday' call.

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Famous Squawk codes These special codes are standardized by the International Civil Aviation Organization (ICAO), so seeing an emergency code in Denver means the same thing as seeing the code in Delhi. The first of these is the code 7500, which signals “unlawful interference,” more commonly referred to as hijacking.

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An aircraft experiencing a loss of two-way radio communications capability can be expected to squawk Code 7600.

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Series 20 — Code 2000 is to recognize an aircraft that has not received instructions from the air traffic control units to operate the transponder. (Codes 2001 to 2077 are available for domestic purposes.) Series 75 — Code 7500 is reserved for recognizing an aircraft subject to unlawful interference.

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Squawk 1000 is a code assigned by air traffic control to indicate that an aircraft is experiencing an emergency.

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The Pilots. For those in charge of looking after your safety while onboard, it's fair to say that most of them love the 777.

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The first emergency code that you may have become familiar with is Squawk 7500. This code is used to indicate that the aircraft has been hijacked, and therefore requires urgent emergency support from both security services and air traffic control.

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The 3 Must-Know Aircraft Emergency Squawk Codes For Pilots
  • 7700 – Distress or Urgency Condition. Before we begin discussing emergencies, let's define our terms as listed in the Pilot/Controller Glossary. ...
  • 7600 – Two-Way Radio Communication Failure (NORDO) ...
  • 7500 – Air Piracy (Hijacking or Hostile Acts Onboard)


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For example, 1200 in the USA means that the flight is flying under Visual Flight Rules (VFR) and is not typically in direct contact with ATC. 1200 is a shared code so you may see many aircraft transmitting it at the same time in a given area.

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This notice assigns Code 1202 for use by gliders not in contact with an air traffic control (ATC) facility. The notice also provides general flight characteristics of gliders and some of their limitations.

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“Squawk 1234” means to just dial 1234 into your transponder. The ATC radar will show the controller that number in the tag associated with your plane. If the tell you, “squawk 1244 and ident”, you should put in the code first, and then press and release the Ident (or ID) button on the transponder.

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Code 1400: This code is to be used when flying in controlled airspace and you are not receiving a transponder signal from ATC. Code 2000: This code indicates that the aircraft is operating in military airspace different meaning.

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1200 is a shared code so you may see many aircraft transmitting it at the same time in a given area. In other parts of the world such as Europe, 7000 is used for VFR flights. The most widely recognized squawk codes are the 3 codes which indicate emergency situations.

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