Apparatus

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sensors Mode-S transponder

A66D33

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N513GJ · operated by UNITED AIRLINES INC

Hex
A66D33
Octal
51466463
Decimal
10,906,931
Country
US
Tail
N513GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
724
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A66D33.

Country allocation

The ICAO 24-bit address A66D33 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
GJS4520 GoJet Airlines 10 2026-07-24
GJS4420 - 10 2026-07-03
GJS4387 - 9 2026-07-03
GJS4447 - 8 2026-07-18
GJS4433 GoJet Airlines 8 2026-07-25
GJS4426 - 8 2026-07-10
GJS4530 GoJet Airlines 7 2026-06-15
GJS4482 - 7 2026-07-19
GJS4471 - 7 2026-06-29
GJS4444 GoJet Airlines 7 2026-07-25
GJS4405 GoJet Airlines 7 2026-07-25
GJS4403 - 7 2026-07-22
GJS4171 GoJet Airlines 7 2026-06-05
GJS4613 GoJet Airlines 6 2026-05-29
GJS4570 GoJet Airlines 6 2026-07-16
GJS4562 GoJet Airlines 6 2026-06-15
GJS4554 GoJet Airlines 6 2026-06-04
GJS4512 - 6 2026-07-11
GJS4485 - 6 2026-07-01
GJS4427 GoJet Airlines 6 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GJS4175 ORD → TYS Jul 26, 22:20 UTCJul 26, 22:45 UTC25m
2026-07-26 GJS4461 PWM → IAD Jul 26, 19:40 UTCJul 26, 21:10 UTC1h 30m
2026-07-26 GJS4595 EWR → RIC Jul 26, 15:55 UTCJul 26, 16:45 UTC50m
2026-07-26 GJS4595 EWR → RIC Jul 26, 16:10 UTCJul 26, 16:31 UTC21m
2026-07-26 GJS4611 EWR → ILM Jul 26, 14:00 UTCJul 26, 14:40 UTC40m
2026-07-26 GJS4440 EWR → ITH Jul 26, 11:45 UTCJul 26, 12:20 UTC35m
2026-07-26 GJS4603 MSN → ORD Jul 26, 03:15 UTCJul 26, 03:45 UTC30m
2026-07-25 GJS4434 DCA → EWR Jul 25, 23:15 UTCJul 26, 00:35 UTC1h 20m
2026-07-25 GJS4419 GSO → EWR Jul 25, 19:00 UTCJul 25, 20:40 UTC1h 40m
2026-07-25 GJS4444 EWR → DCA Jul 25, 15:45 UTCJul 25, 16:35 UTC50m
2026-07-25 GJS4444 EWR → DCA Jul 25, 15:41 UTCJul 25, 16:35 UTC54m
2026-07-25 GJS4433 EWR → DCA Jul 25, 13:35 UTCJul 25, 14:45 UTC1h 10m
2026-07-25 GJS4399 CVG → EWR Jul 25, 10:10 UTCJul 25, 11:35 UTC1h 25m
2026-07-25 GJS4405 EWR → DTW Jul 25, 01:35 UTCJul 25, 02:45 UTC1h 10m
2026-07-25 GJS4405 EWR → DTW Jul 25, 01:27 UTCJul 25, 02:59 UTC1h 32m
2026-07-24 GJS4526 ORF → IAD Jul 24, 22:50 UTCJul 24, 23:40 UTC50m
2026-07-24 GJS4526 ORF → IAD Jul 24, 22:57 UTCJul 24, 23:37 UTC40m
2026-07-24 GJS4552 IAD → SYR Jul 24, 20:55 UTCJul 24, 21:45 UTC50m
2026-07-24 GJS4607 TVC → ORD Jul 24, 15:40 UTCJul 24, 17:15 UTC1h 35m
2026-07-24 GJS4191 RIC → EWR Jul 24, 13:00 UTCJul 24, 14:20 UTC1h 20m
2026-07-24 GJS4580 IAD → ACK Jul 24, 10:20 UTCJul 24, 11:25 UTC1h 5m
2026-07-24 GJS4520 ORD → CHA Jul 24, 02:23 UTCJul 24, 03:49 UTC1h 26m
2026-07-24 GJS4520 ORD → CHA Jul 24, 02:40 UTCJul 24, 03:50 UTC1h 10m
2026-07-23 GJS4575 EWR → STL Jul 23, 23:55 UTCJul 24, 00:50 UTC55m
2026-07-23 GJS4384 IAD → YOW Jul 23, 22:10 UTCJul 23, 23:00 UTC50m
2026-07-23 GJS4384 IAD → YOW Jul 23, 21:58 UTCJul 23, 23:02 UTC1h 4m
2026-07-22 GJS4494 EWR → GSO Jul 22, 20:15 UTCJul 22, 21:10 UTC55m
2026-07-22 GJS4491 ORF → EWR Jul 22, 17:50 UTCJul 22, 18:35 UTC45m
2026-07-22 GJS4403 PIT → EWR Jul 22, 15:35 UTCJul 22, 16:30 UTC55m
2026-07-22 GJS4390 EWR → GSO Jul 22, 13:45 UTCJul 22, 14:40 UTC55m
2026-07-22 GJS4427 EWR → DCA Jul 22, 11:20 UTCJul 22, 12:00 UTC40m
2026-07-21 GJS4427 EWR → DCA Jul 21, 13:05 UTCJul 21, 14:30 UTC1h 25m
2026-07-21 GJS4427 EWR → DCA Jul 21, 13:17 UTCJul 21, 14:38 UTC1h 21m
2026-07-21 GJS4415 - Jul 21, 09:45 UTCJul 21, 10:40 UTC55m
2026-07-20 GJS4484 EWR → HHH Jul 20, 23:20 UTCJul 21, 00:05 UTC44m
2026-07-20 GJS4564 ORD → ICT Jul 20, 20:05 UTCJul 20, 21:35 UTC1h 30m
2026-07-20 GJS4431 EWR → DCA Jul 20, 17:35 UTCJul 20, 18:50 UTC1h 15m
2026-07-20 GJS4517 STL → ORD Jul 20, 15:40 UTCJul 20, 16:30 UTC50m
2026-07-20 GJS4517 STL → ORD Jul 20, 15:36 UTCJul 20, 16:15 UTC39m
2026-07-20 GJS4573 LEX → ORD Jul 20, 01:50 UTCJul 20, 03:40 UTC1h 50m
2026-07-19 GJS4574 ORD → YOW Jul 19, 21:05 UTCJul 19, 22:30 UTC1h 25m
2026-07-19 GJS4436 - Jul 19, 19:00 UTCJul 19, 20:15 UTC1h 15m
2026-07-19 GJS4439 - Jul 19, 16:35 UTCJul 19, 17:40 UTC1h 5m
2026-07-19 GJS4462 - Jul 19, 13:55 UTCJul 19, 15:15 UTC1h 20m
2026-07-19 GJS4397 - Jul 19, 11:35 UTCJul 19, 12:30 UTC55m
2026-07-19 GJS3383 HHH → PQI Jul 19, 03:25 UTCJul 19, 05:05 UTC1h 40m
2026-07-19 GJS4482 ORD → TUL Jul 19, 01:35 UTCJul 19, 02:42 UTC1h 7m
2026-07-19 GJS4482 ORD → TUL Jul 19, 01:20 UTCJul 19, 02:45 UTC1h 25m
2026-07-18 GJS4571 - Jul 18, 22:25 UTCJul 19, 00:25 UTC2h 0m
2026-07-18 GJS4543 - Jul 18, 18:40 UTCJul 18, 19:50 UTC1h 10m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N513GJ page for operator, model, and routing details .

Mode-S A66D33 frequently asked

What is Mode-S code A66D33?
A66D33 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N513GJ.
Where is Mode-S A66D33 registered?
Mode-S code A66D33 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A66D33 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A66D33, octal 51466463, decimal 10,906,931.
What flights does A66D33 operate?
Mode-S A66D33 has broadcast 20 distinct callsigns, including GJS4520, GJS4420, GJS4387, GJS4447, GJS4433.