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74 votes

Can you request a new squawk code if you don’t like the one being assigned?

No, there is no procedure for assigning a new squawk code because a pilot is superstitious. The whole system behind assigning squawk codes is fairly complex, and requesting new codes for non-...
60levelchange's user avatar
55 votes
Accepted

What are all the squawk codes?

Here is a list of all the squawk codes (there's 4096 of them). Very few of them have a specific fixed meaning. Probably the only three that always, globally, have the exact same meaning are 7500 (...
60levelchange's user avatar
26 votes
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Why do the transponders introduce codes instead of using aircraft registration numbers?

To expand upon voretaq7's answer, understanding the history and evolution of transponders can more deeply explain why this is the way it is (for now). When Allied (US/UK/Others) WWII planes returned ...
Jimmy's user avatar
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23 votes
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Do airliners have a "switch" or other means of rapidly squawking emergency?

In the 737, it's just the 4 dials (well, 2 sets of concentric knobs). Since we're basically always talking to ATC, the need to squawk 7700 is quite rare; all the emergencies I've declared have been ...
Ralph J's user avatar
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20 votes

Can you request a new squawk code if you don’t like the one being assigned?

You can request a new one, but it’s up to ATC to decide whether to change it. Some will and some won’t, but mostly it depends on how busy they are. I’ve seen discussions (in a private forum) about the ...
StephenS's user avatar
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18 votes

Why do the transponders introduce codes instead of using aircraft registration numbers?

The short answer is that they often do both. Mode S transponders (which you'll find on most airliners, and are now becoming common on light aircraft as well) transmit a unique aircraft identifier ...
voretaq7's user avatar
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15 votes

What are all the squawk codes?

Squawk codes are used by air traffic control to identify aircraft on the secondary surveillance radar. Flights are being given a squawk code by an air traffic controller, the pilot dials it into the ...
DeltaLima's user avatar
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12 votes

Do airliners have a "switch" or other means of rapidly squawking emergency?

It's been a few years, but in the 9 years or so I developed Comm/Nav/Surv equipment for the air transport market I never saw any quick select buttons. If you wanted a code, you had to dial it in. I ...
Gerry's user avatar
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10 votes

When may I change my transponder code to 1200 when being handled by ATC?

ATC will tell you something like, "N1234R radar service terminated. Squawk VFR. Frequency change approved; good day" which you will repeat back as an instruction. You do not change from the ...
Ryan Mortensen's user avatar
7 votes

Are all IFR flights assigned squawk codes in US controlled airspace?

No. /X (VOR only), /D (VOR/DME only), /Y (LORAN only), and /M (TACAN only) aircraft do not have transponders. Primary-only aircraft can be assigned flight plans, and fly IFR. It's not common, though, ...
atc_ceedee's user avatar
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7 votes

What are all the squawk codes?

In addition to the other great answers, you might be wondering why the squawk codes are the way they are — why each digit only goes up to 7 before rolling around to 0. I'm not an aviation expert ...
Muzer's user avatar
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7 votes

Can you request a new squawk code if you don’t like the one being assigned?

A couple of times I have heard requests for change and they have been granted. Several years ago I asked a couple of approach controllers about it. The supervisor said that he simply avoids numbers ...
mongo's user avatar
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7 votes
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Specific Squawk Codes Information

Nothing The only squawk codes that have meaning are 1200, 7000, 7700, 7600, 7500, 4000, 2000 and 1000 The other codes are simply assigned to aircraft for a given flight in a given sector.
Dave's user avatar
  • 101k
6 votes

Can you request a new squawk code if you don’t like the one being assigned?

Well you can always ask... ATC is unlikely to give you a requested code or change your code though. There are a few ways to get a code, either from an IFR flight plan submission, or from a local block(...
Dave's user avatar
  • 101k
6 votes

What are all the squawk codes?

7500 hijack 7600 no radio 7700 emergency If you really want to learn, reading the FAR and AIM will really get you up to speed: http://www.faraim.org/ One might wonder why 8 and 9 are not used. I ...
CrossRoads's user avatar
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6 votes
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Is it possible for squawk to change automatically in emergency situations?

Whether or not an airlines is in an emergency situation is not a black or white question. There are millions of different internal and external factors that come into play, any combination of which ...
60levelchange's user avatar
6 votes

Specific Squawk Codes Information

As @Dave pointed out, there are very few squawk codes which have the same meaning across all countries in the world. So at the very least we would need to know where in the world these codes were ...
randomhead's user avatar
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5 votes
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When is squawk 1000 assigned in USA?

Currently, FAA's "fusion" software uses discrete squawk codes to merge targets generated by different surveillance systems, i.e. SSR (often several of them) and ADS-B. They plan to upgrade the ...
StephenS's user avatar
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5 votes
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Why are there not more emergency squawk codes?

The airport should have firefighting equipment ready in the event of any emergency. Whether there is already fire on board, a crash will start a fire about 90% of the time. Every emergency is unique ...
Therac's user avatar
  • 27.2k
4 votes

What happens when a GA pilot squawks 7500?

Who would shoot you down and why? You are in the middle of nowhere. Who are you endangering? ATC would try to contact you to ascertain your actual condition. You may have accidentally put in the wrong ...
Dean F.'s user avatar
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4 votes
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What transponder code is assigned to Dream Chaser space-plane?

The approach category has absolutely nothing to do with the transponder code. If the DreamChaser does have an aircraft transponder, and if ATC assigns it a code, it will be just a regular transponder ...
HiddenWindshield's user avatar
4 votes

Can you request a new squawk code if you don’t like the one being assigned?

Yes, you can. "Center, N123DY request a new squawk." There should be no problem with being issued a new one. The "06" subset is one of Denver Center's enroute squawks, so 0666 gets ...
atc_ceedee's user avatar
  • 1,522
4 votes

What are all the squawk codes?

In addition to those globally recognized special values, and locally valid special values (uncontrolled VR, IFR) you will be assigned the code by the ATC. They will usually assign you a code in ...
Vladimir F Героям слава's user avatar
4 votes

What Transponder code to use flying between Oakland and Hawaii?

Whichever code is assigned to the individual flight by ATC. There isn't a fixed code to use for any one specific route. You might want to see: How does ATC know if you have been assigned a squawk or ...
60levelchange's user avatar
3 votes

What are all the squawk codes?

Additionally, local air traffic facilities have reserved codes for local IFR and VFR traffic, as well as other codes that may function uniquely in their control environment. As an example, in JAX ...
propgunone's user avatar
3 votes

When is squawk 1000 assigned in USA?

1000 is a blockout code that prevents the ADS-B transmitter from also sending its discrete code, if you enter 1000 on your transponder no Mode 3/A code is sent in the ADS-B OUT message. Its part of AC-...
Dave's user avatar
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3 votes
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Why is it fairly common for the same aircraft to declare two emergencies, usually radio failures, in less than an hour?

There's going to be a little speculation here, but I believe this may be a Flightradar24 thing (or a ground radar thing), and not an aircraft thing. Helos tend to stay very low, and radar isn't ...
FlyJunior172's user avatar
3 votes

Relation between Squawk code and ICAO adress

The ICAO 24-bit aircraft address is encoded in every ADS-B (Downlink Format = 17) message. It is the primary means of associating messages to the same aircraft in ADS-B. What you have in your question ...
DeltaLima's user avatar
  • 83.5k
3 votes

Are squawk codes linked with flight info such as route and flight data?

In the united-states, the squawk code is the (primary) method of correlating a radar target with useful information such as the aircraft identifier, its destination and route, its requested altitude, ...
randomhead's user avatar
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