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sensors Mode-S transponder

A2E9A3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N287SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A2E9A3
Octal
50564643
Decimal
10,676,643
Country
US
Tail
N287SY
Type
E75L
No current signal · last broadcast 5h ago
Flights observed
628
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A2E9A3.

Country allocation

The ICAO 24-bit address A2E9A3 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
SKW3788 - 17 2026-07-13
SKW3833 SkyWest Airlines 16 2026-06-05
SKW3768 - 16 2026-07-13
SKW3777 SkyWest Airlines 15 2026-06-06
SKW117W - 15 2026-07-13
SKW3963 SkyWest Airlines 14 2026-05-23
SKW3852 - 14 2026-06-28
SKW4149 - 12 2026-07-11
SKW4078 SkyWest Airlines 11 2026-06-20
SKW4108 SkyWest Airlines 10 2026-06-19
SKW3853 - 10 2026-06-29
SKW4179 - 9 2026-06-18
SKW3933 - 9 2026-07-12
SKW3688 - 9 2026-07-10
SKW172E - 8 2026-06-28
SKW4100 SkyWest Airlines 7 2026-06-23
SKW3741 - 7 2026-06-20
SKW3708 SkyWest Airlines 7 2026-05-23
SKW4449 SkyWest Airlines 6 2026-05-31
SKW4155 - 6 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW3803 SLC → SBA Jul 14, 03:10 UTCJul 14, 04:45 UTC1h 35m
2026-07-14 SKW3800 - Jul 14, 01:05 UTCJul 14, 01:45 UTC40m
2026-07-14 SKW3800 GTF → SLC Jul 14, 00:41 UTCJul 14, 01:40 UTC59m
2026-07-13 SKW3800 - Jul 13, 22:20 UTCJul 13, 22:50 UTC30m
2026-07-13 SKW3800 SLC → GTF Jul 13, 22:21 UTCJul 13, 23:20 UTC59m
2026-07-13 SKW3768 - Jul 13, 19:45 UTCJul 13, 21:00 UTC1h 15m
2026-07-13 SKW3768 - Jul 13, 18:15 UTCJul 13, 18:25 UTC10m
2026-07-13 SKW3768 - Jul 13, 17:10 UTCJul 13, 17:40 UTC30m
2026-07-13 SKW117W COS → SLC Jul 13, 14:25 UTCJul 13, 15:40 UTC1h 15m
2026-07-13 SKW3788 SLC → COS Jul 13, 05:25 UTCJul 13, 06:45 UTC1h 20m
2026-07-13 SKW3788 SLC → COS Jul 13, 05:16 UTCJul 13, 06:34 UTC1h 18m
2026-07-13 SKW3732 - Jul 13, 03:45 UTCJul 13, 04:25 UTC40m
2026-07-13 SKW3732 RNO → SLC Jul 13, 03:13 UTCJul 13, 04:15 UTC1h 2m
2026-07-13 SKW3732 - Jul 13, 01:10 UTCJul 13, 02:15 UTC1h 5m
2026-07-12 SKW3933 - Jul 12, 23:30 UTCJul 13, 00:10 UTC40m
2026-07-12 SKW3933 - Jul 12, 20:10 UTCJul 12, 21:10 UTC1h 0m
2026-07-12 SKW3933 SLC → BUR Jul 12, 17:01 UTCJul 12, 18:40 UTC1h 40m
2026-07-12 SKW3607 - Jul 12, 14:35 UTCJul 12, 15:25 UTC50m
2026-07-11 SKW4446 - Jul 11, 23:55 UTCJul 12, 00:45 UTC50m
2026-07-11 SKW4446 SLC → BOI Jul 11, 23:58 UTCJul 12, 00:39 UTC41m
2026-07-11 SKW4155 - Jul 11, 20:50 UTCJul 11, 22:20 UTC1h 30m
2026-07-11 SKW4149 SEA → EUG Jul 11, 18:45 UTCJul 11, 19:35 UTC50m
2026-07-11 SKW4153 SMF → SEA Jul 11, 00:40 UTCJul 11, 02:10 UTC1h 30m
2026-07-10 SKW4153 SEA → SMF Jul 10, 22:05 UTCJul 10, 23:35 UTC1h 30m
2026-07-10 SKW3736 SJC → SEA Jul 10, 18:45 UTCJul 10, 20:30 UTC1h 45m
2026-07-10 SKW3736 SJC → SEA Jul 10, 16:00 UTCJul 10, 17:50 UTC1h 50m
2026-07-10 SKW4008 - Jul 10, 12:45 UTCJul 10, 13:15 UTC30m
2026-07-10 SKW3913 SEA → PDX Jul 10, 04:20 UTCJul 10, 04:50 UTC30m
2026-07-10 SKW3688 BOI → SEA Jul 10, 01:50 UTCJul 10, 02:55 UTC1h 5m
2026-07-09 SKW3688 - Jul 9, 23:35 UTCJul 10, 00:30 UTC55m
2026-07-09 SKW3735 - Jul 9, 20:50 UTCJul 9, 21:40 UTC50m
2026-07-09 SKW3735 SEA → RDM Jul 9, 18:45 UTCJul 9, 19:40 UTC55m
2026-07-09 SKW3749 - Jul 9, 16:25 UTCJul 9, 17:20 UTC55m
2026-07-09 SKW3873 - Jul 9, 04:55 UTCJul 9, 05:35 UTC40m
2026-07-09 SKW4141 - Jul 9, 02:40 UTCJul 9, 03:35 UTC55m
2026-07-09 SKW4141 SEA → RDM Jul 9, 00:50 UTCJul 9, 01:30 UTC40m
2026-07-08 SKW4062 - Jul 8, 22:55 UTCJul 8, 23:30 UTC35m
2026-07-08 SKW4062 SEA → PDX Jul 8, 21:35 UTCJul 8, 22:05 UTC30m
2026-07-08 SKW112J YVR → SEA Jul 8, 18:40 UTCJul 8, 19:10 UTC30m
2026-07-08 SKW123J SEA → YVR Jul 8, 16:45 UTCJul 8, 17:20 UTC35m
2026-07-08 SKW4471 PDX → SEA Jul 8, 14:35 UTCJul 8, 15:05 UTC30m
2026-07-08 SKW3913 SEA → PDX Jul 8, 04:20 UTCJul 8, 04:55 UTC35m
2026-07-08 SKW3688 - Jul 8, 02:00 UTCJul 8, 03:05 UTC1h 5m
2026-07-08 SKW3688 BOI → SEA Jul 8, 01:38 UTCJul 8, 02:55 UTC1h 17m
2026-07-07 SKW3688 - Jul 7, 23:35 UTCJul 8, 00:45 UTC1h 10m
2026-07-07 SKW3679 - Jul 7, 19:00 UTCJul 7, 22:05 UTC3h 5m
2026-07-07 SKW138Y - Jul 7, 16:45 UTCJul 7, 17:55 UTC1h 10m
2026-07-07 SKW138Y LAX → TUS Jul 7, 16:49 UTCJul 7, 17:52 UTC1h 3m
2026-07-07 SKW4106 - Jul 7, 14:20 UTCJul 7, 14:45 UTC25m
2026-07-07 SKW4106 RNO → LAX Jul 7, 14:18 UTCJul 7, 15:25 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 N287SY page for operator, model, and routing details .

Mode-S A2E9A3 frequently asked

What is Mode-S code A2E9A3?
A2E9A3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N287SY.
Where is Mode-S A2E9A3 registered?
Mode-S code A2E9A3 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 A2E9A3 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2E9A3, octal 50564643, decimal 10,676,643.
What flights does A2E9A3 operate?
Mode-S A2E9A3 has broadcast 20 distinct callsigns, including SKW3788, SKW3833, SKW3768, SKW3777, SKW117W.