Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A4E4A3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N414SY · operated by SKYWEST AIRLINES INC

Hex
A4E4A3
Octal
51162243
Decimal
10,806,435
Country
US
Tail
N414SY
Type
E75L
Broadcasting now · callsign SKW3311 · 31,025 ft
Flights observed
690
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Current position

A4E4A3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4E4A3 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
SKW3368 SkyWest Airlines 8 2026-04-26
SKW3337 - 8 2026-07-14
SKW3076 - 8 2026-06-22
SKW3027 SkyWest Airlines 8 2026-05-24
SKW3437 SkyWest Airlines 7 2026-05-23
SKW3250 - 7 2026-07-09
SKW847E SkyWest Airlines 6 2026-07-24
SKW3494 SkyWest Airlines 6 2026-07-17
SKW3440 - 6 2026-06-21
SKW3287 SkyWest Airlines 6 2026-07-25
SKW3219 - 6 2026-07-11
SKW3087 - 6 2026-07-19
SKW3080 - 6 2026-07-13
SKW3047 - 6 2026-07-14
SKW3455 - 5 2026-07-14
SKW3410 SkyWest Airlines 5 2026-07-20
SKW3409 SkyWest Airlines 5 2026-07-23
SKW3384 SkyWest Airlines 5 2026-07-26
SKW3343 - 5 2026-06-26
SKW3322 SkyWest Airlines 5 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3262 BFL → PHX Jul 26, 21:35 UTCJul 26, 22:20 UTC45m
2026-07-26 SKW3117 SAN → SLC Jul 26, 19:07 UTCJul 26, 20:21 UTC1h 14m
2026-07-26 SKW3117 SAN → SLC Jul 26, 18:55 UTCJul 26, 20:25 UTC1h 30m
2026-07-26 SKW3122 PHX → STS Jul 26, 16:20 UTCJul 26, 17:37 UTC1h 17m
2026-07-26 SKW3122 PHX → STS Jul 26, 16:10 UTCJul 26, 17:40 UTC1h 30m
2026-07-26 SKW3384 SJC → PDX Jul 26, 13:05 UTCJul 26, 14:10 UTC1h 5m
2026-07-26 SKW3005 SAF → DFW Jul 26, 06:00 UTCJul 26, 06:45 UTC46m
2026-07-26 SKW3020 SNA → SFO Jul 26, 02:35 UTCJul 26, 04:30 UTC1h 55m
2026-07-25 SKW3012 STS → SAN Jul 25, 23:30 UTCJul 26, 01:25 UTC1h 55m
2026-07-25 SKW3482 SFO → SAN Jul 25, 20:35 UTCJul 25, 21:45 UTC1h 10m
2026-07-25 SKW3486 BOI → SFO Jul 25, 18:30 UTCJul 25, 19:30 UTC1h 0m
2026-07-25 SKW3287 SJC → LAX Jul 25, 15:35 UTCJul 25, 16:50 UTC1h 15m
2026-07-25 SKW3287 SJC → LAX Jul 25, 15:48 UTCJul 25, 16:49 UTC1h 1m
2026-07-25 SKW3432 SAN → SFO Jul 25, 02:35 UTCJul 25, 03:45 UTC1h 10m
2026-07-25 SKW3231 SNA → SFO Jul 25, 00:35 UTCJul 25, 01:50 UTC1h 15m
2026-07-24 SKW3483 PDX → SJC Jul 24, 22:20 UTCJul 24, 23:40 UTC1h 20m
2026-07-24 SKW3300 PSP → SEA Jul 24, 19:40 UTCJul 24, 20:20 UTC40m
2026-07-24 SKW3300 PSP → SEA Jul 24, 18:00 UTCJul 24, 18:50 UTC50m
2026-07-24 SKW3487 SAN → SMF Jul 24, 14:45 UTCJul 24, 16:10 UTC1h 25m
2026-07-24 SKW847E SAN → FAT Jul 24, 05:55 UTCJul 24, 06:40 UTC45m
2026-07-24 SKW847E SAN → FAT Jul 24, 05:29 UTCJul 24, 06:40 UTC1h 11m
2026-07-24 SKW3060 PHX → SAN Jul 24, 03:35 UTCJul 24, 04:25 UTC50m
2026-07-24 SKW3061 LAX → SJC Jul 24, 00:55 UTCJul 24, 01:50 UTC55m
2026-07-23 SKW3028 SAN → LAS Jul 23, 21:10 UTCJul 23, 21:55 UTC45m
2026-07-23 SKW3028 SAN → LAS Jul 23, 21:12 UTCJul 23, 21:54 UTC42m
2026-07-23 SKW3023 SFO → SEA Jul 23, 19:15 UTCJul 23, 20:05 UTC50m
2026-07-23 SKW3409 SAN → STS Jul 23, 16:50 UTCJul 23, 17:40 UTC50m
2026-07-23 SKW847E SAN → FAT Jul 23, 05:15 UTCJul 23, 06:00 UTC45m
2026-07-23 SKW3211 LEX → ORD Jul 23, 01:05 UTCJul 23, 02:15 UTC1h 10m
2026-07-22 SKW3210 ORD → LEX Jul 22, 21:40 UTCJul 22, 23:15 UTC1h 35m
2026-07-22 SKW3045 ORD → HPN Jul 22, 19:05 UTCJul 22, 20:25 UTC1h 20m
2026-07-22 SKW3055 LAX → LAS Jul 22, 16:35 UTCJul 22, 18:05 UTC1h 30m
2026-07-22 SKW3417 LAX → SFO Jul 22, 14:35 UTCJul 22, 15:40 UTC1h 5m
2026-07-22 SKW3115 MCI → PHX Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-22 SKW3030 SFO → BUR Jul 22, 02:15 UTCJul 22, 03:40 UTC1h 25m
2026-07-21 SKW3029 PSP → SEA Jul 21, 23:45 UTCJul 22, 00:55 UTC1h 10m
2026-07-21 SKW3123 LTO → DFW Jul 21, 20:50 UTCJul 21, 22:25 UTC1h 35m
2026-07-21 SKW3123 LTO → DFW Jul 21, 21:00 UTCJul 21, 22:24 UTC1h 24m
2026-07-21 SKW3112 LAX → PDX Jul 21, 18:25 UTCJul 21, 20:00 UTC1h 35m
2026-07-21 SKW3370 - Jul 21, 14:30 UTCJul 21, 16:25 UTC1h 55m
2026-07-21 SKW3022 ORD → BNA Jul 21, 00:45 UTCJul 21, 02:45 UTC2h 0m
2026-07-20 SKW3041 STS → BUR Jul 20, 23:20 UTCJul 20, 23:50 UTC30m
2026-07-20 SKW3042 EUG → SEA Jul 20, 21:45 UTCJul 20, 22:10 UTC25m
2026-07-20 SKW3042 EUG → SEA Jul 20, 21:46 UTCJul 20, 22:10 UTC24m
2026-07-20 SKW3045 ORD → HPN Jul 20, 19:15 UTCJul 20, 20:30 UTC1h 15m
2026-07-20 SKW3055 LAX → LAS Jul 20, 16:35 UTCJul 20, 18:05 UTC1h 30m
2026-07-20 SKW3417 - Jul 20, 14:15 UTCJul 20, 15:25 UTC1h 10m
2026-07-20 SKW3410 PSP → SFO Jul 20, 04:15 UTCJul 20, 06:10 UTC1h 55m
2026-07-19 SKW3498 SEA → SEA Jul 19, 22:55 UTCJul 20, 03:10 UTC4h 15m
2026-07-19 SKW3087 MFR → SEA Jul 19, 20:45 UTCJul 19, 21:45 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 N414SY page for operator, model, and routing details .

Mode-S A4E4A3 frequently asked

What is Mode-S code A4E4A3?
A4E4A3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N414SY.
Where is Mode-S A4E4A3 registered?
Mode-S code A4E4A3 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 A4E4A3 broadcasting right now?
Yes. Mode-S A4E4A3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4E4A3, octal 51162243, decimal 10,806,435.
What flights does A4E4A3 operate?
Mode-S A4E4A3 has broadcast 20 distinct callsigns, including SKW3368, SKW3337, SKW3076, SKW3027, SKW3437.