Apparatus

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sensors Mode-S transponder

A524C5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N430SY · operated by SKYWEST AIRLINES INC

Hex
A524C5
Octal
51222305
Decimal
10,822,853
Country
US
Tail
N430SY
Type
E75L
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
683
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A524C5.

Country allocation

The ICAO 24-bit address A524C5 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
SKW3337 SkyWest Airlines 11 2026-07-25
SKW3038 - 10 2026-07-02
SKW3499 - 9 2026-07-12
SKW3498 - 8 2026-06-18
SKW3437 SkyWest Airlines 8 2026-06-08
SKW3362 - 8 2026-07-18
SKW3076 - 8 2026-07-15
SKW3497 - 7 2026-07-06
SKW3450 - 7 2026-07-06
SKW3122 - 7 2026-07-13
SKW3039 SkyWest Airlines 7 2026-04-20
SKW3022 SkyWest Airlines 7 2026-04-21
SKW3015 - 7 2026-07-17
SKW3467 - 6 2026-07-06
SKW3414 SkyWest Airlines 6 2026-06-07
SKW3385 - 6 2026-07-07
SKW3361 - 6 2026-06-20
SKW3315 SkyWest Airlines 6 2026-07-26
SKW3109 SkyWest Airlines 6 2026-07-22
SKW3036 - 6 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3028 SAN → LAS Jul 26, 20:35 UTCJul 26, 21:15 UTC40m
2026-07-26 SKW3023 SFO → SEA Jul 26, 18:15 UTCJul 26, 19:20 UTC1h 5m
2026-07-26 SKW3315 LAX → SEA Jul 26, 13:40 UTCJul 26, 15:00 UTC1h 20m
2026-07-26 SKW3302 SNA → SFO Jul 26, 04:28 UTCJul 26, 05:21 UTC53m
2026-07-26 SKW3302 SNA → SFO Jul 26, 04:15 UTCJul 26, 05:25 UTC1h 10m
2026-07-25 SKW3337 SAN → SFO Jul 25, 23:40 UTCJul 26, 00:55 UTC1h 15m
2026-07-25 SKW3352 SAN → SFO Jul 25, 20:50 UTCJul 25, 21:55 UTC1h 5m
2026-07-25 SKW3217 PDX → ONT Jul 25, 14:55 UTCJul 25, 17:05 UTC2h 10m
2026-07-25 SKW3323 LAX → PDX Jul 25, 01:40 UTCJul 25, 03:15 UTC1h 35m
2026-07-24 SKW3398 PDX → SBP Jul 24, 18:00 UTCJul 24, 23:50 UTC5h 50m
2026-07-24 SKW3480 BZN → SAN Jul 24, 14:15 UTCJul 24, 16:10 UTC1h 55m
2026-07-24 SKW3375 SJC → PDX Jul 24, 03:55 UTCJul 24, 05:05 UTC1h 10m
2026-07-24 SKW3375 SJC → PDX Jul 24, 04:03 UTCJul 24, 05:00 UTC57m
2026-07-24 SKW3070 SEA → PSC Jul 24, 00:55 UTCJul 24, 03:00 UTC2h 5m
2026-07-23 SKW3262 BFL → PHX Jul 23, 22:00 UTCJul 23, 22:45 UTC45m
2026-07-23 SKW3121 - Jul 23, 19:30 UTCJul 23, 20:45 UTC1h 15m
2026-07-23 SKW3110 LAX → SJC Jul 23, 17:20 UTCJul 23, 18:20 UTC1h 0m
2026-07-23 SKW3018 DFW → LAW Jul 23, 14:40 UTCJul 23, 16:20 UTC1h 40m
2026-07-23 SKW3018 DFW → LAW Jul 23, 14:31 UTCJul 23, 16:14 UTC1h 43m
2026-07-23 SKW3298 LAX → SEA Jul 23, 02:15 UTCJul 23, 04:30 UTC2h 15m
2026-07-23 SKW3433 SFO → LAX Jul 23, 00:40 UTCJul 23, 01:05 UTC25m
2026-07-22 SKW3433 SFO → LAX Jul 22, 23:15 UTCJul 22, 23:40 UTC25m
2026-07-22 SKW3294 GEG → SEA Jul 22, 21:15 UTCJul 22, 21:45 UTC30m
2026-07-22 SKW3294 GEG → SEA Jul 22, 19:25 UTCJul 22, 19:50 UTC25m
2026-07-22 SKW3089 RNO → SEA Jul 22, 16:35 UTCJul 22, 18:05 UTC1h 30m
2026-07-22 SKW3353 RDM → SFO Jul 22, 14:25 UTCJul 22, 15:35 UTC1h 10m
2026-07-22 SKW3109 LAX → SFO Jul 22, 12:50 UTCJul 22, 13:15 UTC25m
2026-07-22 SKW3285 LAX → SEA Jul 22, 03:45 UTCJul 22, 05:00 UTC1h 15m
2026-07-22 SKW3133 LAX → SEA Jul 22, 01:59 UTCJul 22, 02:38 UTC39m
2026-07-22 SKW3133 LAX → SEA Jul 22, 01:50 UTCJul 22, 02:35 UTC45m
2026-07-22 SKW812T FAT → SAN Jul 22, 00:05 UTCJul 22, 00:55 UTC50m
2026-07-21 SKW3389 SAN → SJC Jul 21, 22:15 UTCJul 21, 23:00 UTC45m
2026-07-21 SKW3479 SJC → BOI Jul 21, 19:55 UTCJul 21, 21:10 UTC1h 15m
2026-07-21 SKW3479 SJC → BOI Jul 21, 19:47 UTCJul 21, 21:04 UTC1h 17m
2026-07-21 SKW3342 LAX → SFO Jul 21, 17:40 UTCJul 21, 18:40 UTC1h 0m
2026-07-21 SKW3244 SFO → SNA Jul 21, 13:50 UTCJul 21, 15:00 UTC1h 10m
2026-07-21 SKW3067 LAX → SFO Jul 21, 07:25 UTCJul 21, 08:15 UTC50m
2026-07-21 SKW3072 SAN → SFO Jul 21, 01:15 UTCJul 21, 03:05 UTC1h 50m
2026-07-21 SKW3072 SAN → SFO Jul 21, 01:30 UTCJul 21, 03:00 UTC1h 30m
2026-07-20 SKW3065 - Jul 20, 23:15 UTCJul 21, 00:15 UTC59m
2026-07-20 SKW3065 SFO → RDM Jul 20, 23:15 UTCJul 21, 00:14 UTC59m
2026-07-20 SKW3352 SAN → SFO Jul 20, 21:05 UTCJul 20, 22:10 UTC1h 5m
2026-07-20 SKW3426 - Jul 20, 18:50 UTCJul 20, 20:05 UTC1h 15m
2026-07-20 SKW3463 - Jul 20, 16:45 UTCJul 20, 17:50 UTC1h 5m
2026-07-20 SKW3402 - Jul 20, 13:30 UTCJul 20, 14:25 UTC55m
2026-07-20 SKW3133 LAX → SEA Jul 20, 01:10 UTCJul 20, 01:55 UTC45m
2026-07-19 SKW3221 EUG → LAX Jul 19, 22:40 UTCJul 19, 23:45 UTC1h 5m
2026-07-19 SKW3221 EUG → LAX Jul 19, 22:23 UTCJul 19, 23:40 UTC1h 17m
2026-07-19 SKW3346 LAX → SFO Jul 19, 20:10 UTCJul 19, 21:00 UTC50m
2026-07-19 SKW3409 - Jul 19, 18:15 UTCJul 19, 19:15 UTC1h 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 N430SY page for operator, model, and routing details .

Mode-S A524C5 frequently asked

What is Mode-S code A524C5?
A524C5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N430SY.
Where is Mode-S A524C5 registered?
Mode-S code A524C5 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 A524C5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A524C5, octal 51222305, decimal 10,822,853.
What flights does A524C5 operate?
Mode-S A524C5 has broadcast 20 distinct callsigns, including SKW3337, SKW3038, SKW3499, SKW3498, SKW3437.