Apparatus

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sensors Mode-S transponder

A73665

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N564GJ · operated by UNITED AIRLINES INC

Hex
A73665
Octal
51633145
Decimal
10,958,437
Country
US
Tail
N564GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
653
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S A73665.

Country allocation

The ICAO 24-bit address A73665 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
GJS4475 - 9 2026-07-08
GJS4449 - 8 2026-07-05
GJS4421 GoJet Airlines 8 2026-07-25
GJS4382 GoJet Airlines 8 2026-06-15
GJS4523 GoJet Airlines 7 2026-07-26
GJS4493 - 7 2026-07-13
GJS4419 GoJet Airlines 7 2026-06-09
GJS4417 - 7 2026-07-18
GJS4383 - 7 2026-07-08
GJS4190 GoJet Airlines 7 2026-07-21
GJS4611 - 6 2026-06-22
GJS4603 - 6 2026-06-21
GJS4569 - 6 2026-07-06
GJS4540 GoJet Airlines 6 2026-06-05
GJS4510 - 6 2026-07-07
GJS4458 - 6 2026-07-18
GJS4453 GoJet Airlines 6 2026-07-22
GJS4451 GoJet Airlines 6 2026-07-25
GJS4443 - 6 2026-06-27
GJS4416 - 6 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GJS4523 ORD → RIC Jul 26, 19:35 UTCJul 26, 20:55 UTC1h 20m
2026-07-26 GJS4525 EWR → PVD Jul 26, 16:35 UTCJul 26, 17:50 UTC1h 15m
2026-07-26 GJS4529 EWR → ORF Jul 26, 14:05 UTCJul 26, 15:00 UTC55m
2026-07-26 GJS4565 ORD → ROC Jul 26, 11:18 UTCJul 26, 12:21 UTC1h 3m
2026-07-26 GJS4565 ORD → ROC Jul 26, 11:00 UTCJul 26, 12:30 UTC1h 30m
2026-07-25 GJS4591 DCA → EWR Jul 25, 21:00 UTCJul 25, 22:15 UTC1h 15m
2026-07-25 GJS4591 DCA → EWR Jul 25, 21:12 UTCJul 25, 22:13 UTC1h 1m
2026-07-25 GJS4404 HHH → EWR Jul 25, 18:00 UTCJul 25, 19:00 UTC1h 0m
2026-07-25 GJS4502 LGA → IAD Jul 25, 16:10 UTCJul 25, 16:55 UTC45m
2026-07-25 GJS4421 PHL → EWR Jul 25, 13:00 UTCJul 25, 14:20 UTC1h 20m
2026-07-25 GJS4451 EWR → GSO Jul 25, 03:00 UTCJul 25, 04:05 UTC1h 5m
2026-07-24 GJS4175 ORD → TYS Jul 24, 23:05 UTCJul 25, 00:50 UTC1h 45m
2026-07-24 GJS4461 PWM → IAD Jul 24, 20:40 UTCJul 24, 21:15 UTC35m
2026-07-24 GJS4461 PWM → IAD Jul 24, 20:50 UTCJul 24, 22:03 UTC1h 13m
2026-07-24 GJS4572 ORD → MEM Jul 24, 15:05 UTCJul 24, 16:55 UTC1h 50m
2026-07-24 GJS4572 ORD → MEM Jul 24, 15:01 UTCJul 24, 16:14 UTC1h 13m
2026-07-24 GJS4186 EWR → DCA Jul 24, 12:05 UTCJul 24, 13:30 UTC1h 25m
2026-07-23 GJS4451 EWR → GSO Jul 23, 21:50 UTCJul 23, 23:20 UTC1h 30m
2026-07-23 GJS4619 STL → ORD Jul 23, 19:10 UTCJul 23, 20:25 UTC1h 15m
2026-07-23 GJS4189 PHL → EWR Jul 23, 15:15 UTCJul 23, 16:55 UTC1h 40m
2026-07-23 GJS4528 EWR → SCE Jul 23, 12:25 UTCJul 23, 13:45 UTC1h 20m
2026-07-23 GJS4415 EWR → PHL Jul 23, 09:50 UTCJul 23, 10:45 UTC55m
2026-07-22 GJS4484 EWR → HHH Jul 22, 23:50 UTCJul 23, 00:35 UTC45m
2026-07-22 GJS4171 DTW → EWR Jul 22, 20:40 UTCJul 22, 21:45 UTC1h 5m
2026-07-22 GJS4388 ORD → YOW Jul 22, 19:16 UTCJul 22, 19:41 UTC25m
2026-07-22 GJS4388 ORD → YOW Jul 22, 19:00 UTCJul 22, 19:45 UTC45m
2026-07-22 GJS4453 ORF → EWR Jul 22, 15:50 UTCJul 22, 16:50 UTC1h 0m
2026-07-22 GJS4594 ORD → GRB Jul 22, 14:00 UTCJul 22, 14:40 UTC40m
2026-07-22 GJS4166 EWR → CLT Jul 22, 11:10 UTCJul 22, 12:10 UTC1h 0m
2026-07-22 GJS4166 EWR → CLT Jul 22, 10:33 UTCJul 22, 11:59 UTC1h 26m
2026-07-22 GJS4463 IAD → PWM Jul 22, 01:05 UTCJul 22, 02:35 UTC1h 30m
2026-07-21 GJS4582 - Jul 21, 22:50 UTCJul 22, 00:00 UTC1h 10m
2026-07-21 GJS4558 GSO → EWR Jul 21, 21:10 UTCJul 21, 22:00 UTC50m
2026-07-21 GJS4170 DCA → EWR Jul 21, 17:35 UTCJul 21, 18:15 UTC40m
2026-07-21 GJS4460 LEX → ORD Jul 21, 15:45 UTCJul 21, 16:30 UTC45m
2026-07-21 GJS4190 GRR → EWR Jul 21, 13:25 UTCJul 21, 14:05 UTC40m
2026-07-21 GJS4190 GRR → EWR Jul 21, 13:32 UTCJul 21, 13:57 UTC25m
2026-07-21 GJS4495 ORD → ATW Jul 21, 03:40 UTCJul 21, 04:15 UTC35m
2026-07-21 GJS4177 LGA → IAD Jul 21, 00:20 UTCJul 21, 01:20 UTC1h 0m
2026-07-20 GJS4445 EWR → DCA Jul 20, 22:40 UTCJul 20, 23:25 UTC45m
2026-07-20 GJS4168 DCA → EWR Jul 20, 18:45 UTCJul 20, 20:45 UTC2h 0m
2026-07-20 GJS4380 RIC → EWR Jul 20, 16:10 UTCJul 20, 17:30 UTC1h 20m
2026-07-20 GJS4421 PHL → EWR Jul 20, 13:05 UTCJul 20, 14:20 UTC1h 15m
2026-07-20 GJS4451 EWR → GSO Jul 20, 03:15 UTCJul 20, 04:15 UTC1h 0m
2026-07-20 GJS4451 EWR → GSO Jul 20, 03:18 UTCJul 20, 04:12 UTC54m
2026-07-19 GJS4175 ABE → ORD Jul 19, 21:55 UTCJul 19, 23:40 UTC1h 45m
2026-07-19 GJS4461 - Jul 19, 19:15 UTCJul 19, 20:35 UTC1h 20m
2026-07-19 GJS4572 ORD → MEM Jul 19, 15:20 UTCJul 19, 16:50 UTC1h 30m
2026-07-19 GJS4186 EWR → DCA Jul 19, 12:05 UTCJul 19, 13:25 UTC1h 20m
2026-07-19 GJS4447 - Jul 19, 03:15 UTCJul 19, 05:05 UTC1h 50m

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 N564GJ page for operator, model, and routing details .

Mode-S A73665 frequently asked

What is Mode-S code A73665?
A73665 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N564GJ.
Where is Mode-S A73665 registered?
Mode-S code A73665 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 A73665 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A73665, octal 51633145, decimal 10,958,437.
What flights does A73665 operate?
Mode-S A73665 has broadcast 20 distinct callsigns, including GJS4475, GJS4449, GJS4421, GJS4382, GJS4523.