Apparatus

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sensors Mode-S transponder

A7000A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N550GJ · BOMBARDIER Regional Jet CRJ-700 · operated by UNITED AIRLINES INC

Hex
A7000A
Octal
51600012
Decimal
10,944,522
Country
US
Tail
N550GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
724
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A7000A.

Country allocation

The ICAO 24-bit address A7000A 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
GJS4392 GoJet Airlines 12 2026-06-19
GJS4517 - 10 2026-07-08
GJS4415 - 9 2026-07-10
GJS4531 - 8 2026-07-06
GJS4508 - 8 2026-06-30
GJS4430 - 8 2026-07-02
GJS4418 - 8 2026-07-20
GJS4180 - 8 2026-07-04
GJS4523 - 7 2026-06-20
GJS4511 - 7 2026-07-02
GJS4501 - 7 2026-07-07
GJS4476 GoJet Airlines 7 2026-07-23
GJS4468 GoJet Airlines 7 2026-05-29
GJS4455 - 7 2026-07-20
GJS4448 - 7 2026-07-05
GJS4442 - 7 2026-07-03
GJS4438 GoJet Airlines 7 2026-05-20
GJS4414 - 7 2026-07-21
GJS4407 GoJet Airlines 7 2026-05-15
GJS4190 GoJet Airlines 7 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GJS4574 ORD → YOW Jul 26, 22:05 UTCJul 26, 22:30 UTC25m
2026-07-26 GJS4436 IAD → PWM Jul 26, 19:10 UTCJul 26, 20:15 UTC1h 5m
2026-07-26 GJS4583 ORD → OMA Jul 26, 15:45 UTCJul 26, 16:20 UTC35m
2026-07-26 GJS4583 ORD → OMA Jul 26, 15:52 UTCJul 26, 16:05 UTC13m
2026-07-26 GJS4592 EWR → RIC Jul 26, 13:40 UTCJul 26, 14:10 UTC30m
2026-07-26 GJS4522 SCE → ORD Jul 26, 11:00 UTCJul 26, 12:15 UTC1h 15m
2026-07-26 GJS4522 SCE → ORD Jul 26, 11:03 UTCJul 26, 12:11 UTC1h 8m
2026-07-25 GJS4548 EWR → GSO Jul 25, 23:35 UTCJul 26, 00:35 UTC1h 0m
2026-07-25 GJS4564 ORD → ICT Jul 25, 20:10 UTCJul 25, 21:35 UTC1h 25m
2026-07-25 GJS4431 EWR → DCA Jul 25, 17:40 UTCJul 25, 18:50 UTC1h 10m
2026-07-25 GJS4557 ORD → MSN Jul 25, 14:15 UTCJul 25, 14:55 UTC40m
2026-07-24 GJS4179 IAD → EWR Jul 24, 23:10 UTCJul 24, 23:40 UTC30m
2026-07-24 GJS4179 IAD → EWR Jul 24, 23:23 UTCJul 24, 23:41 UTC18m
2026-07-24 GJS4466 AVP → EWR Jul 24, 20:30 UTCJul 24, 21:40 UTC1h 10m
2026-07-24 GJS4569 ORF → EWR Jul 24, 17:55 UTCJul 24, 19:10 UTC1h 15m
2026-07-24 GJS4579 RIC → EWR Jul 24, 13:50 UTCJul 24, 15:25 UTC1h 35m
2026-07-23 GJS4527 IAD → STL Jul 23, 22:15 UTCJul 23, 23:55 UTC1h 40m
2026-07-23 GJS4389 EWR → ILM Jul 23, 19:25 UTCJul 23, 20:40 UTC1h 15m
2026-07-23 GJS4476 RIC → EWR Jul 23, 17:25 UTCJul 23, 18:35 UTC1h 10m
2026-07-23 GJS4459 IAD → LGA Jul 23, 14:10 UTCJul 23, 15:25 UTC1h 15m
2026-07-23 GJS4398 RIC → EWR Jul 23, 11:50 UTCJul 23, 12:50 UTC1h 0m
2026-07-22 GJS4575 EWR → STL Jul 22, 23:45 UTCJul 23, 00:35 UTC50m
2026-07-22 GJS4384 IAD → YOW Jul 22, 22:15 UTCJul 22, 23:00 UTC45m
2026-07-22 GJS4384 IAD → YOW Jul 22, 21:58 UTCJul 22, 23:01 UTC1h 3m
2026-07-22 GJS4560 DCA → EWR Jul 22, 20:10 UTCJul 22, 20:50 UTC40m
2026-07-22 GJS4472 ALB → EWR Jul 22, 18:00 UTCJul 22, 18:55 UTC55m
2026-07-22 GJS4472 ALB → EWR Jul 22, 17:22 UTCJul 22, 18:49 UTC1h 27m
2026-07-22 GJS4493 RIC → EWR Jul 22, 15:00 UTCJul 22, 15:50 UTC50m
2026-07-22 GJS4493 RIC → EWR Jul 22, 14:45 UTCJul 22, 15:47 UTC1h 2m
2026-07-22 GJS4498 EWR → PIT Jul 22, 13:35 UTCJul 22, 13:55 UTC20m
2026-07-22 GJS3386 CVG → ALB Jul 22, 11:25 UTCJul 22, 12:10 UTC45m
2026-07-21 GJS4420 IAD → LGA Jul 21, 17:05 UTCJul 21, 18:05 UTC1h 0m
2026-07-21 GJS4420 IAD → LGA Jul 21, 17:05 UTCJul 21, 18:16 UTC1h 11m
2026-07-21 GJS4181 EWR → DCA Jul 21, 14:30 UTCJul 21, 15:35 UTC1h 5m
2026-07-21 GJS4188 IAD → EWR Jul 21, 12:40 UTCJul 21, 13:50 UTC1h 10m
2026-07-21 GJS4428 - Jul 21, 10:25 UTCJul 21, 11:20 UTC55m
2026-07-21 GJS4428 CMH → IAD Jul 21, 10:33 UTCJul 21, 11:18 UTC45m
2026-07-21 GJS4414 IAD → CMH Jul 21, 03:05 UTCJul 21, 03:55 UTC50m
2026-07-21 GJS4414 IAD → CMH Jul 21, 02:53 UTCJul 21, 03:54 UTC1h 1m
2026-07-20 GJS4455 - Jul 20, 23:45 UTCJul 21, 00:55 UTC1h 10m
2026-07-20 GJS4418 IAD → YOW Jul 20, 21:29 UTCJul 20, 22:24 UTC55m
2026-07-20 GJS4418 - Jul 20, 21:20 UTCJul 20, 22:25 UTC1h 5m
2026-07-20 GJS4549 IAD → ORF Jul 20, 19:10 UTCJul 20, 19:45 UTC35m
2026-07-20 GJS4535 MSN → ORD Jul 20, 17:20 UTCJul 20, 17:40 UTC20m
2026-07-20 GJS4504 ILM → EWR Jul 20, 14:50 UTCJul 20, 15:55 UTC1h 5m
2026-07-20 GJS4492 DCA → EWR Jul 20, 12:55 UTCJul 20, 13:50 UTC55m
2026-07-19 GJS4454 EWR → GSO Jul 19, 18:05 UTCJul 19, 19:40 UTC1h 35m
2026-07-18 GJS4425 IAD → STL Jul 18, 13:25 UTCJul 18, 15:05 UTC1h 40m
2026-07-18 GJS4498 EWR → PIT Jul 18, 10:25 UTCJul 18, 11:15 UTC50m
2026-07-18 GJS4546 GSP → ORD Jul 18, 02:50 UTCJul 18, 03:35 UTC45m

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 N550GJ page for operator, model, and routing details .

Mode-S A7000A frequently asked

What is Mode-S code A7000A?
A7000A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N550GJ.
Where is Mode-S A7000A registered?
Mode-S code A7000A 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 A7000A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7000A, octal 51600012, decimal 10,944,522.
What flights does A7000A operate?
Mode-S A7000A has broadcast 20 distinct callsigns, including GJS4392, GJS4517, GJS4415, GJS4531, GJS4508.