Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 2h ago
Flights observed
556
Distinct callsigns
20
Country
US
Last broadcast
2h ago

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 - 7 2026-07-13
SKW5545 - 6 2026-07-08
SKW5214 - 6 2026-07-06
SKW5962 SkyWest Airlines 5 2026-04-27
SKW5938 - 5 2026-07-12
SKW5820 SkyWest Airlines 5 2026-04-27
SKW5707 SkyWest Airlines 5 2026-04-26
SKW5631 - 5 2026-07-07
SKW5511 SkyWest Airlines 5 2026-06-08
SKW5395 - 5 2026-07-11
SKW5388 - 5 2026-07-11
SKW5288 - 5 2026-07-08
SKW4751 SkyWest Airlines 5 2026-06-12
SKW5882 SkyWest Airlines 4 2026-04-15
SKW5875 SkyWest Airlines 4 2026-06-09
SKW5789 - 4 2026-07-08
SKW5663 - 4 2026-06-23
SKW5533 SkyWest Airlines 4 2026-06-15
SKW5459 SkyWest Airlines 4 2026-05-09
SKW5416 - 4 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SKW5726 - Jul 13, 23:20 UTCJul 14, 00:10 UTC50m
2026-07-13 SKW5623 - Jul 13, 21:45 UTCJul 13, 21:55 UTC10m
2026-07-13 SKW5623 - Jul 13, 18:25 UTCJul 13, 21:55 UTC3h 30m
2026-07-13 SKW5623 GEG → ORD Jul 13, 18:23 UTCJul 13, 21:28 UTC3h 5m
2026-07-13 SKW6014 - Jul 13, 15:30 UTCJul 13, 17:00 UTC1h 30m
2026-07-13 SKW4724 BFL → SFO Jul 13, 13:10 UTCJul 13, 13:55 UTC45m
2026-07-13 SKW4737 SFO → BFL Jul 13, 06:04 UTCJul 13, 06:45 UTC41m
2026-07-13 SKW4737 SFO → BFL Jul 13, 06:01 UTCJul 13, 06:50 UTC50m
2026-07-13 SKW5339 - Jul 13, 03:10 UTCJul 13, 04:10 UTC1h 0m
2026-07-13 SKW5339 SNA → SFO Jul 13, 03:16 UTCJul 13, 04:12 UTC56m
2026-07-13 SKW5650 SFO → SNA Jul 13, 00:50 UTCJul 13, 02:05 UTC1h 15m
2026-07-13 SKW5650 SFO → SNA Jul 13, 00:25 UTCJul 13, 02:01 UTC1h 36m
2026-07-12 SKW5938 - Jul 12, 22:15 UTCJul 12, 23:25 UTC1h 10m
2026-07-12 SKW4757 - Jul 12, 17:35 UTCJul 12, 20:10 UTC2h 35m
2026-07-12 SKW4640 - Jul 12, 13:10 UTCJul 12, 15:35 UTC2h 25m
2026-07-12 SKW4640 HSV → DEN Jul 12, 13:15 UTCJul 12, 15:36 UTC2h 21m
2026-07-12 SKW5356 DEN → HSV Jul 12, 00:45 UTCJul 12, 03:35 UTC2h 50m
2026-07-11 SKW5911 - Jul 11, 21:30 UTCJul 11, 22:05 UTC35m
2026-07-11 SKW5388 - Jul 11, 18:20 UTCJul 11, 21:30 UTC3h 10m
2026-07-11 SKW5388 DEN → HLN Jul 11, 18:24 UTCJul 11, 19:42 UTC1h 18m
2026-07-11 SKW5561 - Jul 11, 14:15 UTCJul 11, 16:05 UTC1h 50m
2026-07-11 SKW5395 - Jul 11, 03:01 UTCJul 11, 03:40 UTC40m
2026-07-10 SKW5243 MTY → IAH Jul 10, 23:27 UTCJul 11, 00:22 UTC55m
2026-07-10 SKW5243 - Jul 10, 23:25 UTCJul 11, 00:25 UTC1h 0m
2026-07-10 SKW6001 - Jul 10, 18:50 UTCJul 10, 20:45 UTC1h 55m
2026-07-10 SKW6001 SFO → MTY Jul 10, 18:54 UTCJul 10, 22:19 UTC3h 25m
2026-07-10 SKW5479 - Jul 10, 12:20 UTCJul 10, 15:40 UTC3h 20m
2026-07-10 SKW5479 SAT → SFO Jul 10, 12:16 UTCJul 10, 15:26 UTC3h 10m
2026-07-10 SKW6036 - Jul 10, 03:45 UTCJul 10, 06:45 UTC3h 0m
2026-07-09 SKW5351 - Jul 9, 23:30 UTCJul 10, 00:35 UTC1h 5m
2026-07-09 SKW5351 SNA → SFO Jul 9, 23:28 UTCJul 10, 00:33 UTC1h 5m
2026-07-09 SKW5440 - Jul 9, 21:35 UTCJul 9, 22:40 UTC1h 5m
2026-07-09 SKW5440 SFO → SNA Jul 9, 21:17 UTCJul 9, 22:39 UTC1h 22m
2026-07-09 SKW5660 - Jul 9, 18:55 UTCJul 9, 20:05 UTC1h 10m
2026-07-09 SKW5660 PSP → SFO Jul 9, 18:26 UTCJul 9, 20:03 UTC1h 37m
2026-07-09 SKW5904 - Jul 9, 15:20 UTCJul 9, 16:15 UTC55m
2026-07-09 SKW4763 IAH → SLC Jul 9, 12:20 UTCJul 9, 14:10 UTC1h 50m
2026-07-09 SKW449T DEN → SLC Jul 9, 01:20 UTCJul 9, 02:35 UTC1h 15m
2026-07-08 SKW5788 - Jul 8, 23:45 UTCJul 9, 00:10 UTC25m
2026-07-08 SKW5789 - Jul 8, 19:55 UTCJul 8, 20:15 UTC20m
2026-07-08 SKW5288 - Jul 8, 16:50 UTCJul 8, 17:30 UTC40m
2026-07-08 SKW5288 DSM → DEN Jul 8, 16:49 UTCJul 8, 18:14 UTC1h 25m
2026-07-08 SKW4801 DEN → DSM Jul 8, 14:20 UTCJul 8, 15:40 UTC1h 20m
2026-07-08 SKW5545 - Jul 8, 10:05 UTCJul 8, 11:55 UTC1h 50m
2026-07-07 SKW4805 DEN → MSN Jul 7, 19:55 UTCJul 7, 21:45 UTC1h 50m
2026-07-07 SKW6041 - Jul 7, 16:30 UTCJul 7, 18:10 UTC1h 40m
2026-07-07 SKW6027 - Jul 7, 05:15 UTCJul 7, 06:25 UTC1h 10m
2026-07-07 SKW5631 - Jul 7, 02:50 UTCJul 7, 04:10 UTC1h 20m
2026-07-07 SKW5631 PSP → SFO Jul 7, 02:25 UTCJul 7, 04:01 UTC1h 36m
2026-07-07 SKW5354 - Jul 7, 00:40 UTCJul 7, 01:40 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 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 2h ago.
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, SKW5545, SKW5214, SKW5962, SKW5938.