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sensors Mode-S transponder

A6DC42

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N541GJ · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A6DC42
Octal
51556102
Decimal
10,935,362
Country
US
Tail
N541GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
725
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A6DC42.

Country allocation

The ICAO 24-bit address A6DC42 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
GJS4381 - 10 2026-07-16
GJS4171 GoJet Airlines 10 2026-07-23
GJS4613 - 9 2026-07-21
GJS4599 - 8 2026-07-14
GJS4469 - 8 2026-07-01
GJS4410 - 8 2026-06-30
GJS4382 - 8 2026-07-16
GJS4611 - 7 2026-06-17
GJS4601 - 7 2026-06-30
GJS4565 GoJet Airlines 7 2026-06-09
GJS4503 - 7 2026-07-12
GJS4493 GoJet Airlines 7 2026-07-09
GJS4466 - 7 2026-07-18
GJS4454 - 7 2026-07-12
GJS4436 - 7 2026-07-17
GJS4585 - 6 2026-07-01
GJS4558 GoJet Airlines 6 2026-07-22
GJS4540 - 6 2026-06-27
GJS4512 - 6 2026-06-30
GJS4479 - 6 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GJS4413 DCA → EWR Jul 26, 22:10 UTCJul 26, 22:30 UTC20m
2026-07-26 GJS4465 ILM → EWR Jul 26, 20:10 UTCJul 26, 21:20 UTC1h 10m
2026-07-26 GJS4193 HHH → EWR Jul 26, 16:15 UTCJul 26, 16:55 UTC40m
2026-07-26 GJS4537 GSO → ORD Jul 26, 14:45 UTCJul 26, 15:25 UTC40m
2026-07-26 GJS4423 STL → EWR Jul 26, 12:40 UTCJul 26, 13:35 UTC55m
2026-07-23 GJS4412 ILM → EWR Jul 23, 23:25 UTCJul 24, 00:10 UTC45m
2026-07-23 GJS4171 DTW → EWR Jul 23, 21:10 UTCJul 23, 22:05 UTC55m
2026-07-23 GJS4171 DTW → EWR Jul 23, 20:50 UTCJul 23, 21:53 UTC1h 3m
2026-07-23 GJS4388 ORD → YOW Jul 23, 18:30 UTCJul 23, 19:20 UTC50m
2026-07-23 GJS4388 ORD → YOW Jul 23, 18:30 UTCJul 23, 19:34 UTC1h 4m
2026-07-23 GJS4185 ORD → STL Jul 23, 14:55 UTCJul 23, 16:25 UTC1h 30m
2026-07-23 GJS4173 DCA → EWR Jul 23, 01:45 UTCJul 23, 03:07 UTC1h 22m
2026-07-23 GJS4173 DCA → EWR Jul 23, 01:55 UTCJul 23, 03:05 UTC1h 10m
2026-07-22 GJS4582 GSO → EWR Jul 22, 22:10 UTCJul 22, 23:20 UTC1h 10m
2026-07-22 GJS4558 GSO → EWR Jul 22, 20:51 UTCJul 22, 21:20 UTC29m
2026-07-22 GJS4558 GSO → EWR Jul 22, 20:35 UTCJul 22, 21:25 UTC50m
2026-07-22 GJS4170 DCA → EWR Jul 22, 18:40 UTCJul 22, 19:25 UTC45m
2026-07-22 GJS4170 DCA → EWR Jul 22, 18:29 UTCJul 22, 19:08 UTC39m
2026-07-22 GJS4460 LEX → ORD Jul 22, 15:45 UTCJul 22, 16:20 UTC35m
2026-07-22 GJS4190 GRR → EWR Jul 22, 13:30 UTCJul 22, 14:10 UTC40m
2026-07-22 GJS4495 GSO → EWR Jul 22, 03:35 UTCJul 22, 04:05 UTC30m
2026-07-21 GJS4400 IAD → LGA Jul 21, 22:15 UTCJul 22, 00:25 UTC2h 10m
2026-07-21 GJS4523 - Jul 21, 19:30 UTCJul 21, 21:00 UTC1h 30m
2026-07-21 GJS4395 CVG → EWR Jul 21, 16:40 UTCJul 21, 17:30 UTC50m
2026-07-21 GJS4395 CVG → EWR Jul 21, 16:40 UTCJul 21, 17:15 UTC35m
2026-07-21 GJS4613 - Jul 21, 14:30 UTCJul 21, 15:10 UTC40m
2026-07-21 GJS4613 ORD → STL Jul 21, 14:39 UTCJul 21, 15:10 UTC31m
2026-07-21 GJS4402 - Jul 21, 11:35 UTCJul 21, 12:35 UTC1h 0m
2026-07-21 GJS4589 DCA → EWR Jul 21, 03:30 UTCJul 21, 04:10 UTC40m
2026-07-20 GJS4582 - Jul 20, 22:05 UTCJul 20, 23:10 UTC1h 5m
2026-07-20 GJS4558 - Jul 20, 20:00 UTCJul 20, 20:55 UTC55m
2026-07-20 GJS4170 DCA → EWR Jul 20, 17:45 UTCJul 20, 18:40 UTC55m
2026-07-20 GJS4460 - Jul 20, 15:55 UTCJul 20, 16:30 UTC35m
2026-07-20 GJS4460 ORD → ATW Jul 20, 15:58 UTCJul 20, 16:32 UTC34m
2026-07-20 GJS4190 GRR → EWR Jul 20, 13:20 UTCJul 20, 14:10 UTC50m
2026-07-20 GJS4495 ORD → ATW Jul 20, 03:25 UTCJul 20, 04:00 UTC35m
2026-07-20 GJS4563 ORD → RIC Jul 20, 00:10 UTCJul 20, 01:15 UTC1h 5m
2026-07-19 GJS4519 ORD → SCE Jul 19, 21:58 UTCJul 19, 22:34 UTC36m
2026-07-19 GJS4519 ORD → SCE Jul 19, 21:50 UTCJul 19, 22:40 UTC50m
2026-07-19 GJS4441 FSD → ORD Jul 19, 19:10 UTCJul 19, 20:30 UTC1h 20m
2026-07-19 GJS4443 - Jul 19, 17:20 UTCJul 19, 18:30 UTC1h 10m
2026-07-19 GJS4584 - Jul 19, 14:25 UTCJul 19, 15:50 UTC1h 25m
2026-07-19 GJS4551 - Jul 19, 12:20 UTCJul 19, 13:25 UTC1h 5m
2026-07-19 GJS4415 - Jul 19, 09:50 UTCJul 19, 10:50 UTC1h 0m
2026-07-19 GJS4484 - Jul 19, 00:30 UTCJul 19, 01:10 UTC40m
2026-07-18 GJS4466 - Jul 18, 21:50 UTCJul 18, 23:20 UTC1h 30m
2026-07-18 GJS4569 - Jul 18, 17:40 UTCJul 18, 18:55 UTC1h 15m
2026-07-18 GJS4569 IAH → SGF Jul 18, 17:47 UTCJul 18, 18:50 UTC1h 3m
2026-07-18 GJS4579 - Jul 18, 13:50 UTCJul 18, 15:25 UTC1h 35m
2026-07-18 GJS4579 STL → IAH Jul 18, 13:52 UTCJul 18, 15:19 UTC1h 27m

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 N541GJ page for operator, model, and routing details .

Mode-S A6DC42 frequently asked

What is Mode-S code A6DC42?
A6DC42 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N541GJ.
Where is Mode-S A6DC42 registered?
Mode-S code A6DC42 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 A6DC42 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 A6DC42, octal 51556102, decimal 10,935,362.
What flights does A6DC42 operate?
Mode-S A6DC42 has broadcast 20 distinct callsigns, including GJS4381, GJS4171, GJS4613, GJS4599, GJS4469.