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sensors Mode-S transponder

A6837D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N519GJ · BOMBARDIER Regional Jet CRJ-700 · operated by BANK OF UTAH TRUSTEE

Hex
A6837D
Octal
51501575
Decimal
10,912,637
Country
US
Tail
N519GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 19:15 UTC
Flights observed
677
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:15 UTC

Last known position

Most recent position reported by Mode-S A6837D.

Country allocation

The ICAO 24-bit address A6837D 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
GJS4415 - 10 2026-07-22
GJS4414 GoJet Airlines 10 2026-06-14
GJS4468 - 9 2026-06-25
GJS4383 - 9 2026-07-10
GJS4168 - 9 2026-06-27
GJS4603 - 8 2026-07-09
GJS4600 - 8 2026-06-18
GJS4475 - 8 2026-07-10
GJS4452 - 8 2026-07-22
GJS4540 GoJet Airlines 7 2026-07-25
GJS4428 - 7 2026-07-06
GJS4382 - 7 2026-07-09
GJS4610 - 6 2026-07-11
GJS4569 - 6 2026-07-21
GJS4551 - 6 2026-07-22
GJS4491 GoJet Airlines 6 2026-05-28
GJS4429 - 6 2026-07-04
GJS4422 GoJet Airlines 6 2026-06-04
GJS4420 - 6 2026-07-14
GJS4605 GoJet Airlines 5 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GJS4404 HHH → EWR Jul 26, 18:05 UTCJul 26, 19:15 UTC1h 10m
2026-07-26 GJS4502 LGA → IAD Jul 26, 16:05 UTCJul 26, 17:00 UTC55m
2026-07-26 GJS4480 DTW → ORD Jul 26, 12:25 UTCJul 26, 13:55 UTC1h 30m
2026-07-26 GJS4480 DTW → ORD Jul 26, 12:29 UTCJul 26, 13:44 UTC1h 15m
2026-07-26 GJS4500 EWR → DCA Jul 26, 01:35 UTCJul 26, 02:45 UTC1h 10m
2026-07-25 GJS4582 GSO → EWR Jul 25, 22:35 UTCJul 25, 23:40 UTC1h 5m
2026-07-25 GJS4558 GSO → EWR Jul 25, 20:35 UTCJul 25, 21:20 UTC45m
2026-07-25 GJS4558 GSO → EWR Jul 25, 20:35 UTCJul 25, 21:17 UTC42m
2026-07-25 GJS4547 IAD → PVD Jul 25, 17:10 UTCJul 25, 19:15 UTC2h 5m
2026-07-25 GJS4427 EWR → DCA Jul 25, 13:10 UTCJul 25, 14:45 UTC1h 35m
2026-07-25 GJS4540 TUL → ORD Jul 25, 10:15 UTCJul 25, 11:35 UTC1h 20m
2026-07-24 GJS4507 IAD → LGA Jul 24, 23:15 UTCJul 25, 00:20 UTC1h 5m
2026-07-24 GJS4441 GSO → EWR Jul 24, 20:25 UTCJul 24, 21:45 UTC1h 20m
2026-07-24 GJS4443 ORD → FSD Jul 24, 17:55 UTCJul 24, 19:05 UTC1h 10m
2026-07-24 GJS4426 GSO → EWR Jul 24, 14:10 UTCJul 24, 15:35 UTC1h 25m
2026-07-23 GJS4553 ORD → LIT Jul 23, 23:55 UTCJul 24, 01:10 UTC1h 15m
2026-07-23 GJS4391 CVG → ORD Jul 23, 21:00 UTCJul 23, 21:15 UTC15m
2026-07-23 GJS4391 CVG → ORD Jul 23, 20:57 UTCJul 23, 21:30 UTC33m
2026-07-23 GJS4479 EWR → GSP Jul 23, 19:15 UTCJul 23, 19:55 UTC40m
2026-07-23 GJS4605 PQI → EWR Jul 23, 16:25 UTCJul 23, 17:20 UTC55m
2026-07-23 GJS4392 LGA → IAD Jul 23, 14:45 UTCJul 23, 15:35 UTC50m
2026-07-23 GJS4522 - Jul 23, 10:45 UTCJul 23, 12:10 UTC1h 25m
2026-07-22 GJS4548 EWR → GSO Jul 22, 23:05 UTCJul 23, 00:00 UTC55m
2026-07-22 GJS4452 - Jul 22, 21:25 UTCJul 22, 21:30 UTC5m
2026-07-22 GJS4452 STL → ORD Jul 22, 20:35 UTCJul 22, 21:30 UTC55m
2026-07-22 GJS4452 STL → ORD Jul 22, 20:38 UTCJul 22, 21:06 UTC28m
2026-07-22 GJS4581 ORD → GSP Jul 22, 18:25 UTCJul 22, 19:10 UTC45m
2026-07-22 GJS4584 - Jul 22, 14:25 UTCJul 22, 16:00 UTC1h 35m
2026-07-22 GJS4551 ORD → TYS Jul 22, 12:21 UTCJul 22, 13:17 UTC56m
2026-07-22 GJS4551 - Jul 22, 12:10 UTCJul 22, 13:20 UTC1h 10m
2026-07-22 GJS4415 - Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-21 GJS4484 EWR → HHH Jul 21, 23:30 UTCJul 22, 00:20 UTC50m
2026-07-21 GJS4466 - Jul 21, 20:20 UTCJul 21, 21:25 UTC1h 5m
2026-07-21 GJS4466 SGF → ORD Jul 21, 20:23 UTCJul 21, 21:08 UTC45m
2026-07-21 GJS4569 - Jul 21, 17:40 UTCJul 21, 18:50 UTC1h 10m
2026-07-21 GJS4569 IAH → SGF Jul 21, 17:47 UTCJul 21, 18:50 UTC1h 3m
2026-07-21 GJS4579 - Jul 21, 13:50 UTCJul 21, 15:15 UTC1h 25m
2026-07-20 GJS4527 IAD → STL Jul 20, 22:05 UTCJul 20, 23:50 UTC1h 45m
2026-07-20 GJS4545 ORD → MLI Jul 20, 19:00 UTCJul 20, 20:10 UTC1h 10m
2026-07-20 GJS4545 ORD → MLI Jul 20, 19:05 UTCJul 20, 20:10 UTC1h 5m
2026-07-20 GJS4424 EWR → CVG Jul 20, 16:55 UTCJul 20, 18:00 UTC1h 5m
2026-07-20 GJS4485 EWR → DCA Jul 20, 15:10 UTCJul 20, 15:40 UTC30m
2026-07-20 GJS4498 EWR → PIT Jul 20, 13:05 UTCJul 20, 13:30 UTC25m
2026-07-18 GJS4561 - Jul 18, 00:00 UTCJul 18, 00:19 UTC20m
2026-07-17 GJS4176 EWR → DCA Jul 17, 22:10 UTCJul 17, 23:00 UTC50m
2026-07-17 GJS4176 EWR → DCA Jul 17, 22:08 UTCJul 17, 23:15 UTC1h 7m
2026-07-17 GJS4457 - Jul 17, 19:20 UTCJul 17, 20:15 UTC55m
2026-07-17 GJS4396 - Jul 17, 17:25 UTCJul 17, 18:15 UTC50m
2026-07-17 GJS4508 DCA → EWR Jul 17, 15:15 UTCJul 17, 15:55 UTC40m
2026-07-17 GJS4444 EWR → DCA Jul 17, 13:30 UTCJul 17, 14:03 UTC33m

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 N519GJ page for operator, model, and routing details .

Mode-S A6837D frequently asked

What is Mode-S code A6837D?
A6837D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N519GJ.
Where is Mode-S A6837D registered?
Mode-S code A6837D 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 A6837D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6837D, octal 51501575, decimal 10,912,637.
What flights does A6837D operate?
Mode-S A6837D has broadcast 20 distinct callsigns, including GJS4415, GJS4414, GJS4468, GJS4383, GJS4168.