Apparatus

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sensors Mode-S transponder

A924D9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N689CA · BOMBARDIER Regional Jet CRJ-900 · operated by DELTA AIR LINES INC

Hex
A924D9
Octal
52222331
Decimal
11,085,017
Country
US
Tail
N689CA
Type
CRJ9
No current signal · last broadcast 4h ago
Flights observed
588
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A924D9.

Country allocation

The ICAO 24-bit address A924D9 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
SKW4120 - 25 2026-07-13
SKW4096 - 14 2026-07-13
SKW4055 SkyWest Airlines 14 2026-07-04
SKW4456 SkyWest Airlines 13 2026-06-25
SKW4123 SkyWest Airlines 13 2026-05-07
SKW3621 SkyWest Airlines 12 2026-05-05
SKW3877 SkyWest Airlines 11 2026-05-21
SKW4040 - 10 2026-06-29
SKW3995 SkyWest Airlines 10 2026-05-22
SKW4103 SkyWest Airlines 9 2026-05-21
SKW4065 - 9 2026-07-09
SKW3984 SkyWest Airlines 9 2026-05-21
SKW3831 - 9 2026-07-05
SKW3854 SkyWest Airlines 8 2026-04-30
SKW3500 SkyWest Airlines 8 2026-05-22
SKW3838 SkyWest Airlines 7 2026-06-13
SKW3757 - 7 2026-07-03
SKW3642 SkyWest Airlines 7 2026-07-10
SKW3589 SkyWest Airlines 7 2026-05-01
SKW3565 - 7 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW4071 - Jul 14, 00:50 UTCJul 14, 01:10 UTC20m
2026-07-13 SKW4096 - Jul 13, 21:20 UTCJul 13, 22:35 UTC1h 15m
2026-07-13 SKW4096 - Jul 13, 19:10 UTCJul 13, 20:20 UTC1h 10m
2026-07-13 SKW4120 ROC → DTW Jul 13, 17:10 UTCJul 13, 17:56 UTC46m
2026-07-13 SKW4120 ROC → DTW Jul 13, 17:15 UTCJul 13, 18:00 UTC45m
2026-07-13 SKW4120 - Jul 13, 15:00 UTCJul 13, 15:50 UTC50m
2026-07-12 SKW3565 - Jul 12, 21:40 UTCJul 12, 22:45 UTC1h 5m
2026-07-12 SKW3565 - Jul 12, 19:30 UTCJul 12, 20:25 UTC55m
2026-07-12 SKW4120 ROC → DTW Jul 12, 16:55 UTCJul 12, 17:50 UTC55m
2026-07-12 SKW4120 ROC → DTW Jul 12, 16:47 UTCJul 12, 17:50 UTC1h 3m
2026-07-12 SKW4120 - Jul 12, 14:45 UTCJul 12, 15:35 UTC50m
2026-07-12 SKW3665 - Jul 12, 12:05 UTCJul 12, 13:01 UTC55m
2026-07-12 SKW3544 - Jul 12, 02:40 UTCJul 12, 03:30 UTC50m
2026-07-12 SKW4151 - Jul 12, 00:35 UTCJul 12, 01:20 UTC45m
2026-07-11 SKW4151 - Jul 11, 20:20 UTCJul 11, 21:05 UTC45m
2026-07-11 SKW4157 FAR → MSP Jul 11, 17:35 UTCJul 11, 18:55 UTC1h 20m
2026-07-11 SKW4157 FAR → MSP Jul 11, 17:26 UTCJul 11, 18:43 UTC1h 17m
2026-07-11 SKW4157 FAR → MSP Jul 11, 14:45 UTCJul 11, 16:20 UTC1h 35m
2026-07-11 SKW3817 - Jul 11, 12:45 UTCJul 11, 13:05 UTC20m
2026-07-11 SKW3646 - Jul 11, 03:15 UTCJul 11, 03:35 UTC20m
2026-07-11 SKW3637 - Jul 11, 00:00 UTCJul 11, 00:40 UTC40m
2026-07-10 SKW3637 - Jul 10, 22:15 UTCJul 10, 22:55 UTC40m
2026-07-10 SKW3642 DTW → CMH Jul 10, 20:00 UTCJul 10, 20:45 UTC45m
2026-07-10 SKW3642 DTW → CMH Jul 10, 18:20 UTCJul 10, 19:00 UTC40m
2026-07-10 SKW3636 CLE → BOS Jul 10, 16:15 UTCJul 10, 17:05 UTC50m
2026-07-10 SKW3636 CLE → BOS Jul 10, 14:25 UTCJul 10, 15:10 UTC45m
2026-07-10 SKW4110 - Jul 10, 11:35 UTCJul 10, 13:00 UTC1h 25m
2026-07-10 SKW4110 OMA → DTW Jul 10, 11:36 UTCJul 10, 12:51 UTC1h 15m
2026-07-09 SKW3715 - Jul 9, 23:55 UTCJul 10, 01:30 UTC1h 35m
2026-07-09 SKW3565 - Jul 9, 21:50 UTCJul 9, 22:50 UTC1h 0m
2026-07-09 SKW3565 SYR → DTW Jul 9, 21:46 UTCJul 9, 22:40 UTC54m
2026-07-09 SKW3565 - Jul 9, 19:50 UTCJul 9, 20:40 UTC50m
2026-07-09 SKW4065 - Jul 9, 16:50 UTCJul 9, 17:45 UTC55m
2026-07-09 SKW4065 MDT → DTW Jul 9, 16:54 UTCJul 9, 17:44 UTC50m
2026-07-09 SKW4065 - Jul 9, 14:45 UTCJul 9, 15:45 UTC1h 0m
2026-07-09 SKW3665 BOI → SLC Jul 9, 12:10 UTCJul 9, 12:55 UTC45m
2026-07-09 SKW3665 BOI → SLC Jul 9, 12:07 UTCJul 9, 12:54 UTC47m
2026-07-09 SKW3544 - Jul 9, 01:10 UTCJul 9, 02:00 UTC50m
2026-07-08 SKW4096 - Jul 8, 21:35 UTCJul 8, 22:55 UTC1h 20m
2026-07-08 SKW4096 - Jul 8, 19:10 UTCJul 8, 20:20 UTC1h 10m
2026-07-08 SKW4120 ROC → DTW Jul 8, 16:50 UTCJul 8, 17:30 UTC40m
2026-07-08 SKW4120 ROC → DTW Jul 8, 16:45 UTCJul 8, 17:30 UTC45m
2026-07-08 SKW4120 - Jul 8, 14:35 UTCJul 8, 15:20 UTC45m
2026-07-08 SKW3817 - Jul 8, 12:35 UTCJul 8, 12:55 UTC20m
2026-07-08 SKW3646 DTW → CLE Jul 8, 03:18 UTCJul 8, 03:42 UTC24m
2026-07-08 SKW3637 BUF → DTW Jul 8, 00:00 UTCJul 8, 00:40 UTC40m
2026-07-07 SKW3637 - Jul 7, 22:10 UTCJul 7, 22:50 UTC40m
2026-07-07 SKW3642 DTW → CMH Jul 7, 20:05 UTCJul 7, 20:50 UTC45m
2026-07-07 SKW3642 DTW → CMH Jul 7, 20:13 UTCJul 7, 20:40 UTC27m
2026-07-07 SKW3642 DTW → CMH Jul 7, 18:30 UTCJul 7, 19:10 UTC40m

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 N689CA page for operator, model, and routing details .

Mode-S A924D9 frequently asked

What is Mode-S code A924D9?
A924D9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N689CA.
Where is Mode-S A924D9 registered?
Mode-S code A924D9 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 A924D9 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A924D9, octal 52222331, decimal 11,085,017.
What flights does A924D9 operate?
Mode-S A924D9 has broadcast 20 distinct callsigns, including SKW4120, SKW4096, SKW4055, SKW4456, SKW4123.