Apparatus

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sensors Mode-S transponder

A4E0EC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N413SY · operated by SKYWEST AIRLINES INC

Hex
A4E0EC
Octal
51160354
Decimal
10,805,484
Country
US
Tail
N413SY
Type
E75L
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
650
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A4E0EC.

Country allocation

The ICAO 24-bit address A4E0EC 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
SKW3055 SkyWest Airlines 8 2026-07-21
SKW864W SkyWest Airlines 7 2026-07-25
SKW3047 - 7 2026-07-10
SKW3018 SkyWest Airlines 7 2026-06-15
SKW3319 - 6 2026-07-09
SKW3300 SkyWest Airlines 6 2026-06-14
SKW3287 - 6 2026-06-19
SKW3273 SkyWest Airlines 6 2026-05-28
SKW3270 SkyWest Airlines 6 2026-06-03
SKW3218 SkyWest Airlines 6 2026-07-25
SKW3131 SkyWest Airlines 6 2026-07-26
SKW3499 SkyWest Airlines 5 2026-07-26
SKW3482 SkyWest Airlines 5 2026-06-19
SKW3455 - 5 2026-07-10
SKW3430 - 5 2026-07-12
SKW3417 SkyWest Airlines 5 2026-07-21
SKW3352 - 5 2026-07-10
SKW3331 SkyWest Airlines 5 2026-07-26
SKW3311 SkyWest Airlines 5 2026-07-25
SKW3224 SkyWest Airlines 5 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3056 IDA → SEA Jul 26, 21:45 UTCJul 26, 23:00 UTC1h 15m
2026-07-26 SKW3038 DFW → ACT Jul 26, 18:50 UTCJul 26, 20:45 UTC1h 55m
2026-07-26 SKW3499 LAX → SFO Jul 26, 16:25 UTCJul 26, 17:40 UTC1h 15m
2026-07-26 SKW3131 BOI → SJC Jul 26, 13:55 UTCJul 26, 15:30 UTC1h 35m
2026-07-26 SKW3131 BOI → SJC Jul 26, 14:07 UTCJul 26, 15:23 UTC1h 16m
2026-07-26 SKW3331 BOI → SAN Jul 26, 00:35 UTCJul 26, 02:10 UTC1h 35m
2026-07-25 SKW3311 SJC → LAX Jul 25, 22:20 UTCJul 25, 23:35 UTC1h 15m
2026-07-25 SKW3218 CVG → ORD Jul 25, 20:20 UTCJul 25, 21:25 UTC1h 5m
2026-07-25 SKW3218 CVG → ORD Jul 25, 20:23 UTCJul 25, 21:20 UTC57m
2026-07-25 SKW3059 SJC → LAX Jul 25, 18:10 UTCJul 25, 19:20 UTC1h 10m
2026-07-25 SKW864W SAN → SJC Jul 25, 15:10 UTCJul 25, 16:10 UTC1h 0m
2026-07-25 SKW3020 SNA → SFO Jul 25, 02:30 UTCJul 25, 04:30 UTC2h 0m
2026-07-24 SKW3012 STS → SAN Jul 24, 23:10 UTCJul 25, 00:51 UTC1h 41m
2026-07-24 SKW3012 STS → SAN Jul 24, 23:00 UTCJul 25, 01:00 UTC2h 0m
2026-07-24 SKW3028 SAN → LAS Jul 24, 20:45 UTCJul 24, 21:35 UTC50m
2026-07-24 SKW3023 SFO → SEA Jul 24, 18:25 UTCJul 24, 19:30 UTC1h 5m
2026-07-24 SKW3409 SAN → STS Jul 24, 16:25 UTCJul 24, 17:15 UTC50m
2026-07-24 SKW3343 SJC → SAN Jul 24, 04:00 UTCJul 24, 05:40 UTC1h 40m
2026-07-24 SKW3343 SJC → SAN Jul 24, 03:46 UTCJul 24, 05:44 UTC1h 58m
2026-07-24 SKW3372 PDX → SJC Jul 24, 00:55 UTCJul 24, 01:20 UTC25m
2026-07-23 SKW3118 RNO → SEA Jul 23, 22:50 UTCJul 23, 23:20 UTC30m
2026-07-23 SKW3360 PDX → SFO Jul 23, 20:55 UTCJul 23, 21:35 UTC40m
2026-07-23 SKW3360 PDX → SFO Jul 23, 19:05 UTCJul 23, 20:00 UTC55m
2026-07-23 SKW3361 SAN → SFO Jul 23, 14:20 UTCJul 23, 17:15 UTC2h 55m
2026-07-23 SKW3225 SEA → YVR Jul 23, 01:00 UTCJul 23, 03:45 UTC2h 45m
2026-07-22 SKW3138 YLW → SEA Jul 22, 20:50 UTCJul 22, 21:50 UTC1h 0m
2026-07-22 SKW3254 FSD → ORD Jul 22, 19:05 UTCJul 22, 19:45 UTC40m
2026-07-22 SKW3254 FSD → ORD Jul 22, 18:55 UTCJul 22, 19:39 UTC44m
2026-07-22 SKW3219 - Jul 22, 15:10 UTCJul 22, 15:50 UTC40m
2026-07-22 SKW3219 - Jul 22, 14:20 UTCJul 22, 15:05 UTC45m
2026-07-22 SKW3024 BNA → ORD Jul 22, 02:15 UTCJul 22, 03:50 UTC1h 35m
2026-07-22 SKW3098 STS → SNA Jul 22, 00:15 UTCJul 22, 01:15 UTC1h 0m
2026-07-21 SKW3097 MRY → PHX Jul 21, 21:50 UTCJul 21, 22:40 UTC50m
2026-07-21 SKW3045 ORD → HPN Jul 21, 19:10 UTCJul 21, 20:25 UTC1h 15m
2026-07-21 SKW3055 LAX → LAS Jul 21, 16:40 UTCJul 21, 18:10 UTC1h 30m
2026-07-21 SKW3417 LAX → SFO Jul 21, 14:15 UTCJul 21, 15:25 UTC1h 10m
2026-07-21 SKW3417 LAX → SFO Jul 21, 14:18 UTCJul 21, 15:24 UTC1h 6m
2026-07-21 SKW3115 MCI → PHX Jul 21, 04:55 UTCJul 21, 06:10 UTC1h 15m
2026-07-21 SKW3030 SJC → PDX Jul 21, 01:50 UTCJul 21, 03:10 UTC1h 20m
2026-07-21 SKW3030 SJC → PDX Jul 21, 01:55 UTCJul 21, 03:04 UTC1h 9m
2026-07-20 SKW3029 - Jul 20, 23:50 UTCJul 21, 00:50 UTC1h 0m
2026-07-20 SKW3123 LTO → DFW Jul 20, 21:10 UTCJul 20, 22:50 UTC1h 40m
2026-07-20 SKW3112 LAX → PDX Jul 20, 18:10 UTCJul 20, 19:40 UTC1h 30m
2026-07-20 SKW3370 - Jul 20, 14:30 UTCJul 20, 16:35 UTC2h 5m
2026-07-20 SKW3356 - Jul 20, 05:50 UTCJul 20, 06:50 UTC1h 0m
2026-07-20 SKW3232 SAN → SFO Jul 20, 03:05 UTCJul 20, 04:10 UTC1h 5m
2026-07-19 SKW812T FAT → SAN Jul 19, 23:45 UTCJul 20, 00:35 UTC50m
2026-07-19 SKW3389 SAN → SJC Jul 19, 21:45 UTCJul 19, 22:30 UTC45m
2026-07-19 SKW3479 SJC → BOI Jul 19, 19:15 UTCJul 19, 20:30 UTC1h 15m
2026-07-19 SKW3342 LAX → SFO Jul 19, 16:35 UTCJul 19, 17:40 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 N413SY page for operator, model, and routing details .

Mode-S A4E0EC frequently asked

What is Mode-S code A4E0EC?
A4E0EC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N413SY.
Where is Mode-S A4E0EC registered?
Mode-S code A4E0EC 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 A4E0EC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4E0EC, octal 51160354, decimal 10,805,484.
What flights does A4E0EC operate?
Mode-S A4E0EC has broadcast 20 distinct callsigns, including SKW3055, SKW864W, SKW3047, SKW3018, SKW3319.