Apparatus

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sensors Mode-S transponder

A2E235

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N285SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A2E235
Octal
50561065
Decimal
10,674,741
Country
US
Tail
N285SY
Type
E75L
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
726
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A2E235.

Country allocation

The ICAO 24-bit address A2E235 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
SKW4153 - 14 2026-07-09
SKW3944 SkyWest Airlines 12 2026-07-25
SKW3853 SkyWest Airlines 12 2026-07-25
SKW4449 - 11 2026-07-01
SKW4141 - 11 2026-07-17
SKW4031 SkyWest Airlines 11 2026-06-02
SKW3992 SkyWest Airlines 10 2026-05-16
SKW3802 SkyWest Airlines 10 2026-05-03
SKW3735 SkyWest Airlines 10 2026-06-07
SKW4149 SkyWest Airlines 9 2026-07-17
SKW3818 - 9 2026-07-15
SKW3736 SkyWest Airlines 9 2026-06-03
SKW4100 SkyWest Airlines 8 2026-05-04
SKW3997 SkyWest Airlines 8 2026-06-04
SKW3892 - 8 2026-07-07
SKW4090 - 7 2026-07-15
SKW4084 SkyWest Airlines 7 2026-07-24
SKW4030 SkyWest Airlines 7 2026-07-26
SKW3833 SkyWest Airlines 7 2026-06-06
SKW3768 - 7 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3859 LAX → OAK Jul 26, 17:10 UTCJul 26, 21:15 UTC4h 5m
2026-07-26 SKW4030 SYR → DTW Jul 26, 13:10 UTCJul 26, 14:25 UTC1h 15m
2026-07-26 SKW120W SLC → PSP Jul 26, 02:50 UTCJul 26, 04:00 UTC1h 10m
2026-07-26 SKW3693 HPN → ATL Jul 26, 00:10 UTCJul 26, 01:25 UTC1h 15m
2026-07-25 SKW3693 HPN → ATL Jul 25, 21:40 UTCJul 25, 23:15 UTC1h 35m
2026-07-25 SKW3944 PDX → SEA Jul 25, 17:50 UTCJul 25, 18:15 UTC25m
2026-07-25 SKW3944 PDX → SEA Jul 25, 17:46 UTCJul 25, 18:09 UTC23m
2026-07-25 SKW3944 PDX → SEA Jul 25, 16:00 UTCJul 25, 16:25 UTC25m
2026-07-25 SKW3901 EWR → BOS Jul 25, 13:10 UTCJul 25, 14:00 UTC50m
2026-07-25 SKW3839 SLC → HLN Jul 25, 03:35 UTCJul 25, 14:05 UTC10h 30m
2026-07-25 SKW3853 SJC → SEA Jul 25, 00:05 UTCJul 25, 01:50 UTC1h 45m
2026-07-24 SKW3853 SJC → SEA Jul 24, 21:15 UTCJul 24, 23:00 UTC1h 45m
2026-07-24 SKW4084 SLC → ABQ Jul 24, 18:35 UTCJul 24, 19:55 UTC1h 20m
2026-07-24 SKW4108 LAX → ABQ Jul 24, 15:50 UTCJul 24, 17:25 UTC1h 35m
2026-07-24 SKW3969 PIT → BOS Jul 24, 13:35 UTCJul 24, 14:45 UTC1h 10m
2026-07-24 SKW4083 MSP → MDW Jul 24, 05:35 UTCJul 24, 06:35 UTC1h 0m
2026-07-24 SKW4126 HPN → DTW Jul 24, 03:00 UTCJul 24, 04:05 UTC1h 5m
2026-07-24 SKW4126 HPN → DTW Jul 24, 00:35 UTCJul 24, 01:30 UTC55m
2026-07-23 SKW4002 - Jul 23, 23:05 UTCJul 23, 23:30 UTC25m
2026-07-23 SKW3741 SAN → LAS Jul 23, 20:45 UTCJul 23, 21:30 UTC45m
2026-07-23 SKW4078 - Jul 23, 18:00 UTCJul 23, 18:50 UTC50m
2026-07-23 SKW4078 - Jul 23, 15:55 UTCJul 23, 16:35 UTC40m
2026-07-23 SKW4179 SEA → EUG Jul 23, 03:15 UTCJul 23, 04:05 UTC50m
2026-07-23 SKW4179 SEA → EUG Jul 23, 01:20 UTCJul 23, 02:00 UTC40m
2026-07-22 SKW3751 - Jul 22, 23:05 UTCJul 22, 23:55 UTC50m
2026-07-22 SKW3751 SAN → LAS Jul 22, 23:07 UTCJul 22, 23:51 UTC44m
2026-07-22 SKW4001 LAX → SAN Jul 22, 21:20 UTCJul 22, 21:55 UTC35m
2026-07-22 SKW4001 LAX → SAN Jul 22, 21:21 UTCJul 22, 21:41 UTC20m
2026-07-22 SKW4108 LAX → ABQ Jul 22, 18:45 UTCJul 22, 20:15 UTC1h 30m
2026-07-22 SKW4084 SLC → ABQ Jul 22, 16:25 UTCJul 22, 17:45 UTC1h 20m
2026-07-22 SKW3708 SEA → SFO Jul 22, 13:20 UTCJul 22, 14:50 UTC1h 30m
2026-07-22 SKW137C MDT → DTW Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-22 SKW137C MDT → DTW Jul 22, 05:07 UTCJul 22, 06:44 UTC1h 37m
2026-07-21 SKW3882 - Jul 21, 23:20 UTCJul 22, 01:25 UTC2h 5m
2026-07-21 SKW116X ATL → SBN Jul 21, 20:00 UTCJul 21, 22:05 UTC2h 5m
2026-07-21 SKW3694 - Jul 21, 17:15 UTCJul 21, 18:35 UTC1h 20m
2026-07-21 SKW3694 - Jul 21, 14:40 UTCJul 21, 15:50 UTC1h 10m
2026-07-21 SKW3845 SLC → GTF Jul 21, 03:15 UTCJul 21, 12:50 UTC9h 35m
2026-07-21 SKW3853 SBA → SLC Jul 21, 00:00 UTCJul 21, 01:35 UTC1h 35m
2026-07-20 SKW3853 SLC → SBA Jul 20, 21:15 UTCJul 20, 22:55 UTC1h 40m
2026-07-20 SKW4084 SLC → ABQ Jul 20, 18:35 UTCJul 20, 19:50 UTC1h 15m
2026-07-20 SKW4084 SLC → ABQ Jul 20, 16:15 UTCJul 20, 17:30 UTC1h 15m
2026-07-20 SKW3708 SEA → SFO Jul 20, 13:20 UTCJul 20, 14:45 UTC1h 25m
2026-07-20 SKW137C SLC → EUG Jul 20, 05:05 UTCJul 20, 06:40 UTC1h 35m
2026-07-20 SKW137C SLC → EUG Jul 20, 05:09 UTCJul 20, 06:35 UTC1h 26m
2026-07-20 SKW3693 HPN → ATL Jul 20, 00:05 UTCJul 20, 01:30 UTC1h 25m
2026-07-19 SKW3693 HPN → ATL Jul 19, 21:15 UTCJul 19, 22:50 UTC1h 35m
2026-07-19 SKW3944 - Jul 19, 17:40 UTCJul 19, 18:20 UTC40m
2026-07-19 SKW3944 IDA → SLC Jul 19, 17:33 UTCJul 19, 18:12 UTC39m
2026-07-19 SKW3944 - Jul 19, 16:00 UTCJul 19, 16:25 UTC25m

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 N285SY page for operator, model, and routing details .

Mode-S A2E235 frequently asked

What is Mode-S code A2E235?
A2E235 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N285SY.
Where is Mode-S A2E235 registered?
Mode-S code A2E235 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 A2E235 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 A2E235, octal 50561065, decimal 10,674,741.
What flights does A2E235 operate?
Mode-S A2E235 has broadcast 20 distinct callsigns, including SKW4153, SKW3944, SKW3853, SKW4449, SKW4141.