Apparatus

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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 11h ago
Flights observed
616
Distinct callsigns
20
Country
US
Last broadcast
11h ago

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
GJS4414 GoJet Airlines 10 2026-06-14
GJS4468 - 9 2026-06-25
GJS4415 - 9 2026-07-04
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
GJS4428 - 7 2026-07-06
GJS4382 - 7 2026-07-09
GJS4610 - 6 2026-07-11
GJS4540 - 6 2026-07-08
GJS4491 GoJet Airlines 6 2026-05-28
GJS4429 - 6 2026-07-04
GJS4422 GoJet Airlines 6 2026-06-04
GJS4597 GoJet Airlines 5 2026-06-07
GJS4588 - 5 2026-07-06
GJS4567 - 5 2026-06-15
GJS4557 - 5 2026-07-09
GJS4546 - 5 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 GJS4545 - Jul 13, 19:00 UTCJul 13, 20:00 UTC1h 0m
2026-07-13 GJS4545 YOW → IAD Jul 13, 19:05 UTCJul 13, 19:59 UTC54m
2026-07-13 GJS4424 - Jul 13, 16:55 UTCJul 13, 18:05 UTC1h 10m
2026-07-13 GJS4485 - Jul 13, 15:35 UTCJul 13, 15:55 UTC20m
2026-07-13 GJS4498 - Jul 13, 14:05 UTCJul 13, 14:35 UTC30m
2026-07-13 GJS4498 IAD → RIC Jul 13, 14:09 UTCJul 13, 14:36 UTC27m
2026-07-13 GJS3376 EWR → IAD Jul 13, 12:35 UTCJul 13, 13:15 UTC40m
2026-07-12 GJS4384 - Jul 12, 20:35 UTCJul 12, 22:05 UTC1h 30m
2026-07-12 GJS4384 CLT → EWR Jul 12, 20:24 UTCJul 12, 22:03 UTC1h 39m
2026-07-12 GJS4408 - Jul 12, 17:30 UTCJul 12, 18:55 UTC1h 25m
2026-07-12 GJS4493 RIC → EWR Jul 12, 14:50 UTCJul 12, 15:45 UTC55m
2026-07-12 GJS4493 RIC → EWR Jul 12, 14:45 UTCJul 12, 15:41 UTC56m
2026-07-11 GJS4393 IAD → RIC Jul 11, 22:23 UTCJul 11, 22:46 UTC23m
2026-07-11 GJS4393 - Jul 11, 22:10 UTCJul 11, 22:35 UTC25m
2026-07-11 GJS4454 STL → IAD Jul 11, 18:05 UTCJul 11, 19:45 UTC1h 40m
2026-07-11 GJS4613 ORD → STL Jul 11, 15:20 UTCJul 11, 16:25 UTC1h 5m
2026-07-11 GJS4613 ORD → STL Jul 11, 15:34 UTCJul 11, 16:20 UTC46m
2026-07-11 GJS4397 GRB → ORD Jul 11, 11:51 UTCJul 11, 12:24 UTC33m
2026-07-11 GJS4397 - Jul 11, 11:35 UTCJul 11, 12:15 UTC40m
2026-07-11 GJS4610 - Jul 11, 03:35 UTCJul 11, 04:10 UTC35m
2026-07-11 GJS4563 - Jul 11, 00:00 UTCJul 11, 01:10 UTC1h 10m
2026-07-10 GJS4519 ORD → SDF Jul 10, 22:10 UTCJul 10, 22:55 UTC45m
2026-07-10 GJS4383 ATW → ORD Jul 10, 19:51 UTCJul 10, 20:18 UTC27m
2026-07-10 GJS4475 - Jul 10, 18:40 UTCJul 10, 19:10 UTC30m
2026-07-10 GJS4453 - Jul 10, 16:30 UTCJul 10, 17:30 UTC1h 0m
2026-07-10 GJS4954 - Jul 10, 14:55 UTCJul 10, 15:40 UTC45m
2026-07-10 GJS4183 - Jul 10, 13:05 UTCJul 10, 13:55 UTC50m
2026-07-10 GJS4412 - Jul 10, 01:50 UTCJul 10, 02:30 UTC40m
2026-07-09 GJS4603 - Jul 9, 23:05 UTCJul 9, 23:35 UTC30m
2026-07-09 GJS4194 - Jul 9, 22:00 UTCJul 9, 22:25 UTC25m
2026-07-09 GJS4381 - Jul 9, 18:30 UTCJul 9, 19:45 UTC1h 15m
2026-07-09 GJS4382 - Jul 9, 16:30 UTCJul 9, 17:40 UTC1h 10m
2026-07-09 GJS4382 ORD → BUF Jul 9, 16:13 UTCJul 9, 17:34 UTC1h 21m
2026-07-09 GJS4557 - Jul 9, 14:00 UTCJul 9, 15:05 UTC1h 5m
2026-07-09 GJS4557 GRB → ORD Jul 9, 14:11 UTCJul 9, 14:32 UTC21m
2026-07-09 GJS4610 - Jul 9, 03:45 UTCJul 9, 04:25 UTC40m
2026-07-09 GJS4610 ORD → GRB Jul 9, 03:30 UTCJul 9, 04:19 UTC49m
2026-07-08 GJS4540 - Jul 8, 23:40 UTCJul 9, 01:00 UTC1h 20m
2026-07-08 GJS3375 IAD → CHA Jul 8, 21:45 UTCJul 8, 22:55 UTC1h 10m
2026-07-07 GJS4418 ROA → IAD Jul 7, 18:55 UTCJul 7, 19:35 UTC40m
2026-07-07 GJS4612 IAD → ROA Jul 7, 17:20 UTCJul 7, 18:00 UTC40m
2026-07-07 GJS4612 IAD → ROA Jul 7, 17:00 UTCJul 7, 17:57 UTC57m
2026-07-06 GJS4428 - Jul 6, 16:10 UTCJul 6, 17:00 UTC50m
2026-07-06 GJS4588 IAD → CMH Jul 6, 04:00 UTCJul 6, 04:45 UTC45m
2026-07-05 GJS4545 ORD → MLI Jul 5, 19:15 UTCJul 5, 20:30 UTC1h 15m
2026-07-05 GJS4424 IAD → YOW Jul 5, 17:05 UTCJul 5, 18:15 UTC1h 10m
2026-07-05 GJS4506 STL → IAD Jul 5, 14:00 UTCJul 5, 15:40 UTC1h 40m
2026-07-05 GJS3375 - Jul 5, 03:40 UTCJul 5, 05:20 UTC1h 40m
2026-07-05 GJS4445 ORD → CVG Jul 5, 00:53 UTCJul 5, 01:30 UTC37m
2026-07-05 GJS4445 ORD → CVG Jul 5, 00:40 UTCJul 5, 01:30 UTC50m

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 11h ago.
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 GJS4414, GJS4468, GJS4415, GJS4383, GJS4168.