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sensors Mode-S transponder

A5287C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N431SY · operated by SKYWEST AIRLINES INC

Hex
A5287C
Octal
51224174
Decimal
10,823,804
Country
US
Tail
N431SY
Broadcasting now · callsign SKW3495 · 23,650 ft
Flights observed
486
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A5287C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A5287C 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
SKW3063 - 7 2026-07-10
SKW3400 - 6 2026-07-13
SKW3015 - 6 2026-07-09
SKW0431 SkyWest Airlines 6 2026-04-15
SKW431 SkyWest Airlines 5 2026-04-15
SKW3455 SkyWest Airlines 5 2026-06-13
SKW3404 - 5 2026-06-30
SKW3218 - 5 2026-07-16
SKW3217 SkyWest Airlines 5 2026-06-12
SKW3112 - 5 2026-07-07
SKW3030 - 5 2026-07-08
SKW9790 SkyWest Airlines 4 2026-05-31
SKW3497 - 4 2026-07-14
SKW3463 - 4 2026-06-15
SKW3443 SkyWest Airlines 4 2026-06-04
SKW3438 - 4 2026-07-11
SKW3374 SkyWest Airlines 4 2026-05-25
SKW3322 - 4 2026-07-12
SKW3311 - 4 2026-07-17
SKW3294 SkyWest Airlines 4 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 SKW3492 SNA → SFO Jul 18, 02:05 UTCJul 18, 03:00 UTC56m
2026-07-18 SKW3080 - Jul 18, 00:19 UTCJul 18, 01:15 UTC55m
2026-07-17 SKW3081 - Jul 17, 21:20 UTCJul 17, 22:20 UTC1h 0m
2026-07-17 SKW3205 SAN → SFO Jul 17, 19:05 UTCJul 17, 20:10 UTC1h 5m
2026-07-17 SKW3205 SAN → SFO Jul 17, 19:05 UTCJul 17, 20:15 UTC1h 10m
2026-07-17 SKW3235 BOI → SAN Jul 17, 15:35 UTCJul 17, 17:35 UTC2h 0m
2026-07-17 SKW3413 - Jul 17, 05:30 UTCJul 17, 06:45 UTC1h 15m
2026-07-17 SKW3068 - Jul 17, 03:55 UTCJul 17, 04:54 UTC1h 0m
2026-07-17 SKW3311 OAK → SAN Jul 17, 01:35 UTCJul 17, 02:54 UTC1h 20m
2026-07-16 SKW3218 - Jul 16, 23:35 UTCJul 17, 00:40 UTC1h 5m
2026-07-16 SKW3028 PHX → SAN Jul 16, 21:30 UTCJul 16, 22:25 UTC55m
2026-07-16 SKW3023 - Jul 16, 19:05 UTCJul 16, 20:25 UTC1h 20m
2026-07-16 SKW3409 - Jul 16, 17:00 UTCJul 16, 17:49 UTC50m
2026-07-16 SKW847E - Jul 16, 05:15 UTCJul 16, 05:55 UTC40m
2026-07-16 SKW3249 AUS → SAN Jul 16, 01:25 UTCJul 16, 04:10 UTC2h 45m
2026-07-15 SKW3250 - Jul 15, 21:15 UTCJul 15, 23:50 UTC2h 35m
2026-07-15 SKW3111 - Jul 15, 19:00 UTCJul 15, 20:10 UTC1h 10m
2026-07-15 SKW3079 - Jul 15, 16:35 UTCJul 15, 17:40 UTC1h 5m
2026-07-15 SKW3385 - Jul 15, 13:25 UTCJul 15, 13:55 UTC30m
2026-07-15 SKW3102 - Jul 15, 05:00 UTCJul 15, 05:25 UTC25m
2026-07-15 SKW3048 - Jul 15, 03:10 UTCJul 15, 03:55 UTC45m
2026-07-14 SKW3107 BUR → EUG Jul 14, 23:35 UTCJul 15, 01:10 UTC1h 35m
2026-07-14 SKW3092 - Jul 14, 21:25 UTCJul 14, 22:25 UTC1h 0m
2026-07-14 SKW3092 STS → BUR Jul 14, 21:35 UTCJul 14, 22:24 UTC49m
2026-07-14 SKW3467 - Jul 14, 19:05 UTCJul 14, 20:15 UTC1h 10m
2026-07-14 SKW3450 - Jul 14, 17:00 UTCJul 14, 18:10 UTC1h 10m
2026-07-14 SKW3497 - Jul 14, 15:10 UTCJul 14, 16:10 UTC1h 0m
2026-07-14 SKW3022 - Jul 14, 02:20 UTCJul 14, 04:35 UTC2h 15m
2026-07-14 SKW3041 EUG → PDX Jul 14, 01:00 UTCJul 14, 01:25 UTC25m
2026-07-13 SKW3042 - Jul 13, 22:00 UTCJul 13, 22:30 UTC30m
2026-07-13 SKW3009 - Jul 13, 19:45 UTCJul 13, 20:50 UTC1h 5m
2026-07-13 SKW3400 BUR → STS Jul 13, 17:00 UTCJul 13, 17:55 UTC55m
2026-07-13 SKW3400 BUR → STS Jul 13, 17:00 UTCJul 13, 17:55 UTC55m
2026-07-13 SKW3213 - Jul 13, 14:55 UTCJul 13, 16:00 UTC1h 5m
2026-07-13 SKW3086 - Jul 13, 01:45 UTCJul 13, 02:45 UTC1h 0m
2026-07-12 SKW3086 - Jul 12, 23:50 UTCJul 13, 01:01 UTC1h 10m
2026-07-12 SKW3076 - Jul 12, 21:25 UTCJul 12, 22:25 UTC1h 0m
2026-07-12 SKW3049 - Jul 12, 19:05 UTCJul 12, 20:10 UTC1h 5m
2026-07-12 SKW3114 - Jul 12, 16:15 UTCJul 12, 17:10 UTC55m
2026-07-12 SKW3114 LAX → STS Jul 12, 16:19 UTCJul 12, 17:10 UTC51m
2026-07-12 SKW3322 MFR → LAX Jul 12, 13:25 UTCJul 12, 15:10 UTC1h 45m
2026-07-12 SKW3322 MFR → LAX Jul 12, 13:26 UTCJul 12, 15:05 UTC1h 39m
2026-07-12 SKW3321 - Jul 12, 03:05 UTCJul 12, 04:45 UTC1h 40m
2026-07-11 SKW3437 - Jul 11, 23:10 UTCJul 12, 00:01 UTC50m
2026-07-11 SKW3438 - Jul 11, 19:00 UTCJul 11, 19:45 UTC45m
2026-07-11 SKW3438 LAX → LAP Jul 11, 18:55 UTCJul 11, 20:55 UTC2h 0m
2026-07-11 SKW3324 EUG → LAX Jul 11, 15:25 UTCJul 11, 17:30 UTC2h 5m
2026-07-11 SKW3324 EUG → LAX Jul 11, 15:35 UTCJul 11, 17:25 UTC1h 50m
2026-07-11 SKW9793 SJC → EUG Jul 11, 03:15 UTCJul 11, 04:25 UTC1h 10m
2026-07-11 SKW9793 SJC → EUG Jul 11, 03:18 UTCJul 11, 04:25 UTC1h 7m

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 N431SY page for operator, model, and routing details .

Mode-S A5287C frequently asked

What is Mode-S code A5287C?
A5287C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N431SY.
Where is Mode-S A5287C registered?
Mode-S code A5287C 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 A5287C broadcasting right now?
Yes. Mode-S A5287C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5287C, octal 51224174, decimal 10,823,804.
What flights does A5287C operate?
Mode-S A5287C has broadcast 20 distinct callsigns, including SKW3063, SKW3400, SKW3015, SKW0431, SKW431.