Apparatus

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sensors Mode-S transponder

A4B96D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N403SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A4B96D
Octal
51134555
Decimal
10,795,373
Country
US
Tail
N403SY
Type
E75L
No current signal · last broadcast Jul 26, 20:35 UTC
Flights observed
676
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:35 UTC

Last known position

Most recent position reported by Mode-S A4B96D.

Country allocation

The ICAO 24-bit address A4B96D 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
SKW3017 SkyWest Airlines 11 2026-07-24
SKW3292 SkyWest Airlines 8 2026-07-20
SKW3440 SkyWest Airlines 7 2026-05-24
SKW3394 SkyWest Airlines 7 2026-06-02
SKW3370 - 7 2026-07-25
SKW3331 - 7 2026-07-19
SKW3300 SkyWest Airlines 7 2026-07-22
SKW3221 SkyWest Airlines 7 2026-07-21
SKW3413 SkyWest Airlines 6 2026-07-22
SKW3404 SkyWest Airlines 6 2026-05-23
SKW3293 - 6 2026-07-20
SKW3059 SkyWest Airlines 6 2026-07-20
SKW3044 SkyWest Airlines 6 2026-05-27
SKW3022 SkyWest Airlines 6 2026-07-25
SKW3018 SkyWest Airlines 6 2026-07-24
SKW3015 SkyWest Airlines 6 2026-05-07
SKW864W SkyWest Airlines 5 2026-07-20
SKW3495 - 5 2026-06-29
SKW3494 SkyWest Airlines 5 2026-07-08
SKW3473 SkyWest Airlines 5 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3111 SFO → LAX Jul 26, 19:15 UTCJul 26, 20:35 UTC1h 20m
2026-07-26 SKW3079 SFO → SNA Jul 26, 16:30 UTCJul 26, 17:45 UTC1h 15m
2026-07-26 SKW3054 YVR → SEA Jul 26, 13:39 UTCJul 26, 14:50 UTC1h 11m
2026-07-26 SKW3054 YVR → SEA Jul 26, 03:15 UTCJul 26, 15:05 UTC11h 51m
2026-07-26 SKW3094 SJC → SEA Jul 26, 00:54 UTCJul 26, 01:43 UTC49m
2026-07-26 SKW3094 SJC → SEA Jul 26, 00:50 UTCJul 26, 01:45 UTC55m
2026-07-25 SKW3046 SEA → PDX Jul 25, 22:50 UTCJul 25, 23:40 UTC50m
2026-07-25 SKW3489 MRY → SAN Jul 25, 20:25 UTCJul 25, 21:35 UTC1h 10m
2026-07-25 SKW3013 PHX → SJC Jul 25, 17:55 UTCJul 25, 18:50 UTC55m
2026-07-25 SKW3013 PHX → SJC Jul 25, 17:46 UTCJul 25, 19:02 UTC1h 16m
2026-07-25 SKW3370 - Jul 25, 14:30 UTCJul 25, 16:15 UTC1h 45m
2026-07-25 SKW3022 ORD → BNA Jul 25, 01:25 UTCJul 25, 03:30 UTC2h 5m
2026-07-24 SKW3041 STS → BUR Jul 24, 23:20 UTCJul 24, 23:45 UTC25m
2026-07-24 SKW3042 EUG → SEA Jul 24, 21:45 UTCJul 24, 22:10 UTC25m
2026-07-24 SKW3121 - Jul 24, 19:20 UTCJul 24, 20:30 UTC1h 10m
2026-07-24 SKW3110 LAX → SJC Jul 24, 16:55 UTCJul 24, 18:00 UTC1h 5m
2026-07-24 SKW3018 DFW → LAW Jul 24, 13:55 UTCJul 24, 15:25 UTC1h 30m
2026-07-24 SKW3017 HPN → ORD Jul 24, 02:20 UTCJul 24, 03:50 UTC1h 30m
2026-07-24 SKW3337 SAN → SFO Jul 24, 00:05 UTCJul 24, 01:20 UTC1h 15m
2026-07-23 SKW3352 SAN → SFO Jul 23, 21:17 UTCJul 23, 22:45 UTC1h 28m
2026-07-23 SKW3426 - Jul 23, 18:55 UTCJul 23, 20:10 UTC1h 15m
2026-07-23 SKW3463 SAN → SFO Jul 23, 16:29 UTCJul 23, 17:29 UTC1h 0m
2026-07-23 SKW3463 - Jul 23, 16:25 UTCJul 23, 17:15 UTC50m
2026-07-23 SKW3402 SFO → LAX Jul 23, 13:15 UTCJul 23, 14:05 UTC50m
2026-07-23 SKW3402 SFO → LAX Jul 23, 13:18 UTCJul 23, 13:59 UTC41m
2026-07-23 SKW3024 BNA → ORD Jul 23, 02:10 UTCJul 23, 03:40 UTC1h 30m
2026-07-23 SKW3098 STS → SNA Jul 23, 00:20 UTCJul 23, 01:15 UTC55m
2026-07-23 SKW3098 STS → SNA Jul 23, 00:21 UTCJul 23, 01:13 UTC52m
2026-07-22 SKW3097 MRY → PHX Jul 22, 21:45 UTCJul 22, 22:35 UTC50m
2026-07-22 SKW3300 PSP → SEA Jul 22, 19:45 UTCJul 22, 20:25 UTC40m
2026-07-22 SKW3300 PSP → SEA Jul 22, 17:45 UTCJul 22, 18:40 UTC55m
2026-07-22 SKW3201 LAX → RNO Jul 22, 15:50 UTCJul 22, 16:50 UTC1h 0m
2026-07-22 SKW3198 SAN → SMF Jul 22, 14:00 UTCJul 22, 14:45 UTC45m
2026-07-22 SKW3413 SJC → BOI Jul 22, 02:55 UTCJul 22, 04:05 UTC1h 10m
2026-07-22 SKW3068 SAN → PHX Jul 22, 01:00 UTCJul 22, 02:00 UTC1h 0m
2026-07-21 SKW3221 EUG → LAX Jul 21, 22:20 UTCJul 21, 23:25 UTC1h 5m
2026-07-21 SKW3346 LAX → SFO Jul 21, 20:20 UTCJul 21, 21:05 UTC45m
2026-07-21 SKW3313 OAK → SAN Jul 21, 18:05 UTCJul 21, 19:20 UTC1h 15m
2026-07-21 SKW3320 - Jul 21, 15:30 UTCJul 21, 16:35 UTC1h 5m
2026-07-21 SKW3384 - Jul 21, 13:30 UTCJul 21, 14:30 UTC1h 0m
2026-07-21 SKW3005 SAF → DFW Jul 21, 06:25 UTCJul 21, 07:15 UTC50m
2026-07-20 SKW3311 SJC → LAX Jul 20, 22:00 UTCJul 20, 23:20 UTC1h 20m
2026-07-20 SKW3218 - Jul 20, 19:45 UTCJul 20, 20:50 UTC1h 5m
2026-07-20 SKW3059 SJC → LAX Jul 20, 17:21 UTCJul 20, 18:28 UTC1h 7m
2026-07-20 SKW3059 SJC → LAX Jul 20, 17:25 UTCJul 20, 18:30 UTC1h 5m
2026-07-20 SKW864W SAN → SJC Jul 20, 15:00 UTCJul 20, 16:00 UTC1h 0m
2026-07-20 SKW3293 AUS → SAN Jul 20, 11:15 UTCJul 20, 13:45 UTC2h 30m
2026-07-20 SKW3292 ORD → BNA Jul 20, 01:50 UTCJul 20, 04:25 UTC2h 35m
2026-07-19 SKW3056 EUG → SAN Jul 19, 22:40 UTCJul 20, 00:50 UTC2h 10m
2026-07-19 SKW3038 DFW → ACT Jul 19, 19:35 UTCJul 19, 21:25 UTC1h 50m

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 N403SY page for operator, model, and routing details .

Mode-S A4B96D frequently asked

What is Mode-S code A4B96D?
A4B96D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N403SY.
Where is Mode-S A4B96D registered?
Mode-S code A4B96D 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 A4B96D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4B96D, octal 51134555, decimal 10,795,373.
What flights does A4B96D operate?
Mode-S A4B96D has broadcast 20 distinct callsigns, including SKW3017, SKW3292, SKW3440, SKW3394, SKW3370.