Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 3h ago
Flights observed
635
Distinct callsigns
20
Country
US
Last broadcast
3h ago

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
SKW4449 - 11 2026-07-01
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
SKW3736 SkyWest Airlines 9 2026-06-03
SKW4149 - 8 2026-07-10
SKW4100 SkyWest Airlines 8 2026-05-04
SKW3997 SkyWest Airlines 8 2026-06-04
SKW3892 - 8 2026-07-07
SKW3853 - 8 2026-06-29
SKW4141 - 7 2026-06-17
SKW3833 SkyWest Airlines 7 2026-06-06
SKW3768 - 7 2026-06-30
SKW3740 - 7 2026-07-13
SKW3707 SkyWest Airlines 7 2026-04-17
SKW4131 - 6 2026-07-10
SKW3953 SkyWest Airlines 6 2026-06-10
SKW3944 - 6 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW3790 GEG → SEA Jul 14, 14:20 UTCJul 14, 15:15 UTC55m
2026-07-14 SKW3677 SEA → GEG Jul 14, 03:20 UTCJul 14, 04:00 UTC40m
2026-07-14 SKW4124 EUG → SEA Jul 14, 01:00 UTCJul 14, 01:40 UTC40m
2026-07-13 SKW181H SEA → EUG Jul 13, 23:05 UTCJul 14, 00:05 UTC1h 0m
2026-07-13 SKW3754 GEG → SEA Jul 13, 20:10 UTCJul 13, 21:05 UTC55m
2026-07-13 SKW3754 SEA → GEG Jul 13, 18:10 UTCJul 13, 18:50 UTC40m
2026-07-13 SKW3740 - Jul 13, 14:55 UTCJul 13, 16:00 UTC1h 5m
2026-07-13 SKW3740 BOI → SEA Jul 13, 14:56 UTCJul 13, 15:50 UTC54m
2026-07-13 SKW4148 - Jul 13, 03:01 UTCJul 13, 04:25 UTC1h 25m
2026-07-12 SKW3799 GEG → LAX Jul 12, 23:25 UTCJul 13, 02:05 UTC2h 40m
2026-07-12 SKW3794 - Jul 12, 20:15 UTCJul 12, 22:10 UTC1h 55m
2026-07-12 SKW3794 LAX → GEG Jul 12, 20:10 UTCJul 12, 22:00 UTC1h 50m
2026-07-12 SKW4119 - Jul 12, 17:55 UTCJul 12, 18:45 UTC50m
2026-07-12 SKW4119 - Jul 12, 15:30 UTCJul 12, 16:40 UTC1h 10m
2026-07-12 SKW3969 - Jul 12, 13:15 UTCJul 12, 14:20 UTC1h 5m
2026-07-12 SKW4083 - Jul 12, 05:35 UTCJul 12, 06:35 UTC1h 0m
2026-07-12 SKW4083 LAX → SMF Jul 12, 05:42 UTCJul 12, 06:34 UTC52m
2026-07-12 SKW4126 - Jul 12, 02:55 UTCJul 12, 04:05 UTC1h 10m
2026-07-11 SKW4126 - Jul 11, 23:55 UTCJul 12, 00:50 UTC55m
2026-07-11 SKW4002 - Jul 11, 22:20 UTCJul 11, 22:45 UTC25m
2026-07-11 SKW3741 LAS → SAN Jul 11, 20:20 UTCJul 11, 21:10 UTC50m
2026-07-11 SKW3741 LAS → SAN Jul 11, 20:10 UTCJul 11, 21:04 UTC54m
2026-07-11 SKW4078 - Jul 11, 18:00 UTCJul 11, 18:55 UTC55m
2026-07-11 SKW4078 - Jul 11, 15:55 UTCJul 11, 16:35 UTC40m
2026-07-11 SKW4179 - Jul 11, 03:20 UTCJul 11, 04:10 UTC50m
2026-07-11 SKW3856 - Jul 11, 00:15 UTCJul 11, 01:40 UTC1h 25m
2026-07-10 SKW4155 EUG → SLC Jul 10, 20:55 UTCJul 10, 22:25 UTC1h 30m
2026-07-10 SKW4149 SEA → EUG Jul 10, 18:50 UTCJul 10, 19:45 UTC55m
2026-07-10 SKW4075 SMF → SEA Jul 10, 15:05 UTCJul 10, 16:40 UTC1h 35m
2026-07-10 SKW4131 SEA → SMF Jul 10, 03:42 UTCJul 10, 05:06 UTC1h 24m
2026-07-10 SKW4131 SEA → SMF Jul 10, 03:40 UTCJul 10, 05:10 UTC1h 30m
2026-07-10 SKW3968 YVR → SEA Jul 10, 01:05 UTCJul 10, 01:35 UTC30m
2026-07-09 SKW3733 SEA → YVR Jul 9, 22:55 UTCJul 9, 23:30 UTC35m
2026-07-09 SKW3733 SEA → YVR Jul 9, 23:02 UTCJul 9, 23:25 UTC23m
2026-07-09 SKW4125 SMF → SEA Jul 9, 20:15 UTCJul 9, 21:50 UTC1h 35m
2026-07-09 SKW4125 SEA → SMF Jul 9, 17:25 UTCJul 9, 18:45 UTC1h 20m
2026-07-09 SKW3816 - Jul 9, 13:35 UTCJul 9, 15:55 UTC2h 20m
2026-07-09 SKW3884 SEA → ONT Jul 9, 03:15 UTCJul 9, 05:15 UTC2h 0m
2026-07-09 SKW4153 SMF → SEA Jul 9, 00:41 UTCJul 9, 02:09 UTC1h 28m
2026-07-09 SKW4153 SMF → SEA Jul 9, 00:40 UTCJul 9, 02:10 UTC1h 30m
2026-07-08 SKW4153 SEA → SMF Jul 8, 22:15 UTCJul 8, 23:35 UTC1h 20m
2026-07-08 SKW4139 RAP → MSP Jul 8, 19:50 UTCJul 8, 20:40 UTC50m
2026-07-08 SKW155A SLC → EUG Jul 8, 17:05 UTCJul 8, 18:40 UTC1h 35m
2026-07-08 SKW4061 OAK → SLC Jul 8, 13:15 UTCJul 8, 14:35 UTC1h 20m
2026-07-08 SKW3797 SLC → OAK Jul 8, 05:20 UTCJul 8, 06:50 UTC1h 30m
2026-07-08 SKW3726 ABQ → SLC Jul 8, 02:15 UTCJul 8, 03:30 UTC1h 15m
2026-07-07 SKW3726 SLC → ABQ Jul 7, 23:50 UTCJul 8, 01:10 UTC1h 20m
2026-07-07 SKW3892 - Jul 7, 21:05 UTCJul 7, 22:30 UTC1h 25m
2026-07-07 SKW3892 - Jul 7, 18:30 UTCJul 7, 19:40 UTC1h 10m
2026-07-07 SKW3719 LEX → DTW Jul 7, 16:20 UTCJul 7, 17:25 UTC1h 5m

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 3h ago.
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, SKW4449, SKW4031, SKW3992, SKW3802.