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sensors Mode-S transponder

A04424

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N116SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A04424
Octal
50042044
Decimal
10,503,204
Country
US
Tail
N116SY
Type
E75L
No current signal · last broadcast 3h ago
Flights observed
575
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A04424.

Country allocation

The ICAO 24-bit address A04424 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
SKW5775 - 11 2026-07-13
SKW5787 - 10 2026-07-06
SKW5553 - 9 2026-06-19
SKW5550 - 8 2026-07-13
SKW5329 - 8 2026-07-06
SKW6045 SkyWest Airlines 7 2026-06-19
SKW5694 - 7 2026-07-10
SKW5444 SkyWest Airlines 7 2026-06-01
SKW5408 - 7 2026-07-13
SKW5259 - 7 2026-07-02
SKW4669 SkyWest Airlines 7 2026-05-26
SKW6008 - 6 2026-07-13
SKW5956 - 6 2026-07-02
SKW5814 SkyWest Airlines 6 2026-07-02
SKW5771 - 6 2026-07-12
SKW5744 - 6 2026-07-13
SKW5529 - 6 2026-07-11
SKW5520 - 6 2026-07-11
SKW5988 SkyWest Airlines 5 2026-05-18
SKW5940 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW5607 - Jul 14, 20:45 UTCJul 14, 21:10 UTC25m
2026-07-14 SKW4700 - Jul 14, 17:40 UTCJul 14, 19:15 UTC1h 35m
2026-07-14 SKW5739 - Jul 14, 15:30 UTCJul 14, 16:10 UTC40m
2026-07-14 SKW5739 SBP → LAX Jul 14, 15:34 UTCJul 14, 16:03 UTC29m
2026-07-13 SKW5550 - Jul 13, 23:50 UTCJul 14, 00:15 UTC25m
2026-07-13 SKW5550 LAX → SBP Jul 13, 23:43 UTCJul 14, 00:26 UTC43m
2026-07-13 SKW6008 - Jul 13, 20:15 UTCJul 13, 22:05 UTC1h 50m
2026-07-13 SKW6008 SUN → LAX Jul 13, 20:10 UTCJul 13, 21:58 UTC1h 48m
2026-07-13 SKW5980 LAX → SUN Jul 13, 17:27 UTCJul 13, 18:48 UTC1h 21m
2026-07-13 SKW5980 - Jul 13, 17:10 UTCJul 13, 18:35 UTC1h 25m
2026-07-13 SKW5408 - Jul 13, 13:55 UTCJul 13, 15:30 UTC1h 35m
2026-07-13 SKW5744 - Jul 13, 04:00 UTCJul 13, 05:31 UTC1h 30m
2026-07-13 SKW5744 LAX → SLC Jul 13, 04:01 UTCJul 13, 05:24 UTC1h 23m
2026-07-13 SKW5940 - Jul 13, 01:30 UTCJul 13, 03:01 UTC1h 30m
2026-07-13 SKW5775 DEN → ASE Jul 13, 00:01 UTCJul 13, 00:20 UTC19m
2026-07-12 SKW5775 - Jul 12, 23:55 UTCJul 13, 00:10 UTC15m
2026-07-12 SKW5776 - Jul 12, 22:10 UTCJul 12, 22:40 UTC30m
2026-07-12 SKW5776 ASE → DEN Jul 12, 21:50 UTCJul 12, 22:35 UTC45m
2026-07-12 SKW5771 - Jul 12, 20:25 UTCJul 12, 20:40 UTC15m
2026-07-12 SKW5771 DEN → ASE Jul 12, 20:00 UTCJul 12, 20:49 UTC49m
2026-07-12 SKW5772 - Jul 12, 17:40 UTCJul 12, 18:10 UTC30m
2026-07-12 SKW5772 ASE → DEN Jul 12, 17:49 UTCJul 12, 18:04 UTC15m
2026-07-12 SKW6046 - Jul 12, 14:35 UTCJul 12, 16:15 UTC1h 40m
2026-07-12 SKW5550 - Jul 12, 02:55 UTCJul 12, 04:45 UTC1h 50m
2026-07-12 SKW5550 ASE → SFO Jul 12, 02:42 UTCJul 12, 04:39 UTC1h 57m
2026-07-11 SKW5775 - Jul 11, 23:40 UTCJul 11, 23:55 UTC15m
2026-07-11 SKW5749 - Jul 11, 21:40 UTCJul 11, 22:10 UTC30m
2026-07-11 SKW342F - Jul 11, 19:50 UTCJul 11, 20:15 UTC25m
2026-07-11 SKW5520 CLD → DEN Jul 11, 16:15 UTCJul 11, 18:10 UTC1h 55m
2026-07-11 SKW5529 DEN → CLD Jul 11, 02:35 UTCJul 11, 04:35 UTC2h 0m
2026-07-10 SKW5694 - Jul 10, 22:40 UTCJul 11, 01:10 UTC2h 30m
2026-07-10 SKW5694 XNA → DEN Jul 10, 22:28 UTCJul 11, 01:09 UTC2h 41m
2026-07-10 SKW5641 DEN → XNA Jul 10, 20:00 UTCJul 10, 21:15 UTC1h 15m
2026-07-10 SKW5520 CLD → DEN Jul 10, 17:00 UTCJul 10, 18:50 UTC1h 50m
2026-07-10 SKW5529 DEN → CLD Jul 10, 02:55 UTCJul 10, 05:45 UTC2h 50m
2026-07-10 SKW5529 DEN → CLD Jul 10, 02:37 UTCJul 10, 05:38 UTC3h 1m
2026-07-09 SKW5694 - Jul 9, 23:30 UTCJul 10, 01:50 UTC2h 20m
2026-07-09 SKW5694 XNA → DEN Jul 9, 23:24 UTCJul 10, 01:46 UTC2h 22m
2026-07-09 SKW5641 DEN → XNA Jul 9, 20:15 UTCJul 9, 21:30 UTC1h 15m
2026-07-09 SKW5536 - Jul 9, 16:05 UTCJul 9, 18:30 UTC2h 25m
2026-07-09 SKW4785 - Jul 9, 03:45 UTCJul 9, 05:55 UTC2h 10m
2026-07-08 SKW5393 - Jul 8, 20:55 UTCJul 9, 00:20 UTC3h 25m
2026-07-08 SKW5514 DEN → HSV Jul 8, 16:35 UTCJul 8, 19:00 UTC2h 25m
2026-07-08 SKW5712 - Jul 8, 13:25 UTCJul 8, 14:35 UTC1h 10m
2026-07-08 SKW5734 - Jul 8, 02:10 UTCJul 8, 03:20 UTC1h 10m
2026-07-07 SKW5914 - Jul 7, 23:25 UTCJul 8, 00:55 UTC1h 30m
2026-07-07 SKW5311 - Jul 7, 20:00 UTCJul 7, 21:20 UTC1h 20m
2026-07-07 SKW5520 CLD → DEN Jul 7, 16:10 UTCJul 7, 18:05 UTC1h 55m
2026-07-07 SKW5520 CLD → DEN Jul 7, 16:07 UTCJul 7, 17:56 UTC1h 49m
2026-07-07 SKW5529 DEN → CLD Jul 7, 02:05 UTCJul 7, 04:05 UTC2h 0m

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 N116SY page for operator, model, and routing details .

Mode-S A04424 frequently asked

What is Mode-S code A04424?
A04424 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N116SY.
Where is Mode-S A04424 registered?
Mode-S code A04424 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 A04424 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A04424, octal 50042044, decimal 10,503,204.
What flights does A04424 operate?
Mode-S A04424 has broadcast 20 distinct callsigns, including SKW5775, SKW5787, SKW5553, SKW5550, SKW5329.