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sensors Mode-S transponder

A1A286

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N204SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A1A286
Octal
50321206
Decimal
10,592,902
Country
US
Tail
N204SY
Type
E75L
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
635
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S A1A286.

Country allocation

The ICAO 24-bit address A1A286 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
SKW5623 SkyWest Airlines 8 2026-07-21
SKW5938 SkyWest Airlines 7 2026-07-20
SKW5545 - 6 2026-07-08
SKW5395 SkyWest Airlines 6 2026-07-18
SKW5288 - 6 2026-07-15
SKW5214 - 6 2026-07-06
SKW5962 SkyWest Airlines 5 2026-04-27
SKW5876 - 5 2026-07-17
SKW5875 - 5 2026-07-16
SKW5820 SkyWest Airlines 5 2026-04-27
SKW5707 SkyWest Airlines 5 2026-04-26
SKW5650 - 5 2026-07-21
SKW5631 - 5 2026-07-07
SKW5511 SkyWest Airlines 5 2026-06-08
SKW5388 - 5 2026-07-11
SKW5339 SkyWest Airlines 5 2026-07-21
SKW4801 - 5 2026-07-15
SKW4751 SkyWest Airlines 5 2026-06-12
SKW4737 - 5 2026-07-21
SKW4724 - 5 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5985 DEN → BHM Jul 26, 20:45 UTCJul 26, 21:20 UTC35m
2026-07-26 SKW5587 BOI → ORD Jul 26, 18:05 UTCJul 26, 19:25 UTC1h 20m
2026-07-26 SKW753Z ORD → OMA Jul 26, 15:35 UTCJul 26, 16:40 UTC1h 5m
2026-07-26 SKW5790 ORD → CRW Jul 26, 11:55 UTCJul 26, 14:05 UTC2h 10m
2026-07-26 SKW4638 BFL → SFO Jul 26, 01:00 UTCJul 26, 03:10 UTC2h 10m
2026-07-25 SKW4749 DTW → ORD Jul 25, 22:35 UTCJul 25, 23:30 UTC55m
2026-07-25 SKW571L ORD → DAY Jul 25, 20:40 UTCJul 25, 21:25 UTC45m
2026-07-25 SKW5901 ORD → FAR Jul 25, 16:20 UTCJul 25, 16:55 UTC35m
2026-07-25 SKW5901 ORD → FAR Jul 25, 15:00 UTCJul 25, 16:15 UTC1h 15m
2026-07-25 SKW5477 MBS → ORD Jul 25, 12:05 UTCJul 25, 13:55 UTC1h 50m
2026-07-25 SKW5618 PDX → SFO Jul 25, 10:15 UTCJul 25, 11:05 UTC50m
2026-07-25 SKW5785 ORD → DTW Jul 25, 01:27 UTCJul 25, 01:48 UTC21m
2026-07-25 SKW5785 ORD → DTW Jul 25, 01:10 UTCJul 25, 01:55 UTC45m
2026-07-24 SKW5929 ORD → OMA Jul 24, 22:10 UTCJul 24, 23:05 UTC55m
2026-07-24 SKW5412 DEN → HSV Jul 24, 20:00 UTCJul 24, 20:45 UTC45m
2026-07-24 SKW5434 FWA → ORD Jul 24, 15:55 UTCJul 24, 18:15 UTC2h 20m
2026-07-24 SKW4672 - Jul 24, 12:45 UTCJul 24, 14:40 UTC1h 55m
2026-07-24 SKW4707 STL → ORD Jul 24, 10:10 UTCJul 24, 10:45 UTC35m
2026-07-24 SKW5768 SBN → ORD Jul 24, 02:00 UTCJul 24, 02:25 UTC25m
2026-07-24 SKW5768 SBN → ORD Jul 24, 01:34 UTCJul 24, 02:26 UTC52m
2026-07-23 SKW6004 ORD → SUN Jul 23, 20:35 UTCJul 24, 00:00 UTC3h 25m
2026-07-23 SKW5574 SJC → LAX Jul 23, 17:05 UTCJul 23, 19:25 UTC2h 20m
2026-07-23 SKW5748 EGE → SFO Jul 23, 13:30 UTCJul 23, 14:20 UTC50m
2026-07-23 SKW5748 EGE → SFO Jul 23, 13:17 UTCJul 23, 14:21 UTC1h 4m
2026-07-23 SKW5698 SFO → FAT Jul 23, 03:05 UTCJul 23, 03:40 UTC35m
2026-07-22 SKW5751 SFO → SMF Jul 22, 23:15 UTCJul 23, 01:00 UTC1h 45m
2026-07-22 SKW5757 SAT → IAH Jul 22, 20:05 UTCJul 22, 21:24 UTC1h 19m
2026-07-22 SKW5757 SAT → IAH Jul 22, 20:00 UTCJul 22, 21:25 UTC1h 25m
2026-07-22 SKW5517 LAX → MFR Jul 22, 17:25 UTCJul 22, 18:15 UTC50m
2026-07-22 SKW5668 ORD → DCA Jul 22, 14:30 UTCJul 22, 15:00 UTC30m
2026-07-22 SKW5668 ORD → DCA Jul 22, 14:21 UTCJul 22, 14:57 UTC36m
2026-07-22 SKW4667 BHM → ORD Jul 22, 11:10 UTCJul 22, 12:55 UTC1h 45m
2026-07-22 SKW5681 SFO → SBP Jul 22, 01:15 UTCJul 22, 03:15 UTC2h 0m
2026-07-21 SKW5623 ORD → BHM Jul 21, 18:20 UTCJul 21, 21:40 UTC3h 20m
2026-07-21 SKW6014 SFO → GEG Jul 21, 15:40 UTCJul 21, 17:10 UTC1h 30m
2026-07-21 SKW4724 BFL → SFO Jul 21, 13:10 UTCJul 21, 13:50 UTC40m
2026-07-21 SKW4737 SFO → BFL Jul 21, 06:15 UTCJul 21, 06:55 UTC40m
2026-07-21 SKW5339 SAV → ORD Jul 21, 03:05 UTCJul 21, 04:15 UTC1h 10m
2026-07-21 SKW5339 SAV → ORD Jul 21, 03:04 UTCJul 21, 04:02 UTC58m
2026-07-21 SKW5650 SFO → SNA Jul 21, 00:55 UTCJul 21, 02:05 UTC1h 10m
2026-07-21 SKW5650 - Jul 21, 01:00 UTCJul 21, 02:10 UTC1h 10m
2026-07-20 SKW5938 FCA → SFO Jul 20, 22:30 UTCJul 20, 23:40 UTC1h 10m
2026-07-20 SKW4757 - Jul 20, 17:35 UTCJul 20, 19:45 UTC2h 10m
2026-07-20 SKW4640 - Jul 20, 13:05 UTCJul 20, 15:25 UTC2h 20m
2026-07-20 SKW5356 FAT → SFO Jul 20, 00:35 UTCJul 20, 03:00 UTC2h 25m
2026-07-19 SKW5540 RDD → DEN Jul 19, 19:45 UTCJul 19, 21:55 UTC2h 10m
2026-07-19 SKW572M SFO → RDD Jul 19, 18:15 UTCJul 19, 18:50 UTC35m
2026-07-19 SKW4729 MRY → SFO Jul 19, 12:15 UTCJul 19, 15:50 UTC3h 35m
2026-07-19 SKW4729 MRY → SFO Jul 19, 12:15 UTCJul 19, 15:47 UTC3h 32m
2026-07-19 SKW5480 - Jul 19, 00:25 UTCJul 19, 03:55 UTC3h 30m

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 N204SY page for operator, model, and routing details .

Mode-S A1A286 frequently asked

What is Mode-S code A1A286?
A1A286 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N204SY.
Where is Mode-S A1A286 registered?
Mode-S code A1A286 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 A1A286 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1A286, octal 50321206, decimal 10,592,902.
What flights does A1A286 operate?
Mode-S A1A286 has broadcast 20 distinct callsigns, including SKW5623, SKW5938, SKW5545, SKW5395, SKW5288.