Apparatus

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sensors Mode-S transponder

A11E8B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N171SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A11E8B
Octal
50217213
Decimal
10,559,115
Country
US
Tail
N171SY
Type
E75L
No current signal · last broadcast Jul 26, 22:40 UTC
Flights observed
696
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:40 UTC

Last known position

Most recent position reported by Mode-S A11E8B.

Country allocation

The ICAO 24-bit address A11E8B 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
SKW3064 SkyWest Airlines 14 2026-06-03
SKW3433 - 11 2026-07-12
SKW3075 SkyWest Airlines 10 2026-07-04
SKW3054 SkyWest Airlines 10 2026-07-25
SKW3293 - 9 2026-07-21
SKW3370 SkyWest Airlines 8 2026-07-15
SKW3368 SkyWest Airlines 8 2026-05-12
SKW3492 - 7 2026-06-23
SKW3443 SkyWest Airlines 7 2026-05-28
SKW3410 SkyWest Airlines 7 2026-06-04
SKW3292 SkyWest Airlines 7 2026-07-21
SKW3060 - 7 2026-07-18
SKW3483 - 6 2026-07-12
SKW3346 SkyWest Airlines 6 2026-07-18
SKW3224 - 6 2026-06-20
SKW3082 - 6 2026-07-11
SKW3066 - 6 2026-07-02
SKW3055 SkyWest Airlines 6 2026-06-07
SKW3017 - 6 2026-06-19
SKW847E SkyWest Airlines 5 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3404 SNA → SFO Jul 26, 21:10 UTCJul 26, 22:40 UTC1h 30m
2026-07-26 SKW3049 IDA → DFW Jul 26, 18:45 UTCJul 26, 19:45 UTC1h 0m
2026-07-26 SKW3114 SEA → LAX Jul 26, 16:15 UTCJul 26, 17:10 UTC55m
2026-07-26 SKW3322 MFR → SEA Jul 26, 13:25 UTCJul 26, 15:10 UTC1h 45m
2026-07-26 SKW3206 SAN → PDX Jul 26, 03:50 UTCJul 26, 05:20 UTC1h 30m
2026-07-26 SKW3036 LAX → SFO Jul 26, 01:20 UTCJul 26, 02:35 UTC1h 15m
2026-07-25 SKW3035 GEG → SEA Jul 25, 22:25 UTCJul 25, 23:40 UTC1h 15m
2026-07-25 SKW3111 SFO → LAX Jul 25, 19:00 UTCJul 25, 20:15 UTC1h 15m
2026-07-25 SKW3111 SFO → LAX Jul 25, 19:06 UTCJul 25, 20:14 UTC1h 8m
2026-07-25 SKW3079 SFO → SNA Jul 25, 16:30 UTCJul 25, 17:40 UTC1h 10m
2026-07-25 SKW3079 SFO → SNA Jul 25, 16:31 UTCJul 25, 17:52 UTC1h 21m
2026-07-25 SKW3054 YVR → SEA Jul 25, 13:39 UTCJul 25, 15:02 UTC1h 23m
2026-07-25 SKW3054 YVR → SEA Jul 25, 03:35 UTCJul 25, 15:05 UTC11h 30m
2026-07-25 SKW3124 SFO → LAX Jul 25, 01:35 UTCJul 25, 02:20 UTC45m
2026-07-24 SKW3126 LAX → SFO Jul 24, 23:50 UTCJul 25, 00:30 UTC40m
2026-07-24 SKW3138 YLW → SEA Jul 24, 21:00 UTCJul 24, 21:45 UTC45m
2026-07-24 SKW3254 FSD → ORD Jul 24, 18:55 UTCJul 24, 19:40 UTC45m
2026-07-24 SKW3254 FSD → ORD Jul 24, 18:55 UTCJul 24, 19:36 UTC41m
2026-07-24 SKW3361 SAN → SFO Jul 24, 14:20 UTCJul 24, 17:05 UTC2h 45m
2026-07-24 SKW3225 SEA → YVR Jul 24, 01:00 UTCJul 24, 03:55 UTC2h 55m
2026-07-23 SKW3408 PDX → FAT Jul 23, 23:10 UTCJul 23, 23:45 UTC35m
2026-07-23 SKW3408 PDX → FAT Jul 23, 23:09 UTCJul 23, 23:40 UTC31m
2026-07-23 SKW3204 SEA → PDX Jul 23, 21:40 UTCJul 23, 22:10 UTC30m
2026-07-23 SKW3078 LAX → SFO Jul 23, 19:20 UTCJul 23, 19:55 UTC35m
2026-07-23 SKW3090 BIS → DFW Jul 23, 17:35 UTCJul 23, 18:10 UTC35m
2026-07-23 SKW3219 - Jul 23, 14:20 UTCJul 23, 16:05 UTC1h 45m
2026-07-23 SKW3133 LAX → SEA Jul 23, 01:15 UTCJul 23, 02:00 UTC45m
2026-07-22 SKW3123 LTO → DFW Jul 22, 21:58 UTCJul 22, 23:11 UTC1h 13m
2026-07-22 SKW3123 LTO → DFW Jul 22, 21:45 UTCJul 22, 22:45 UTC1h 0m
2026-07-22 SKW3112 LAX → PDX Jul 22, 18:10 UTCJul 22, 19:40 UTC1h 30m
2026-07-22 SKW3487 SAN → SMF Jul 22, 14:50 UTCJul 22, 16:15 UTC1h 25m
2026-07-22 SKW847E SAN → FAT Jul 22, 05:32 UTCJul 22, 06:09 UTC37m
2026-07-22 SKW3249 SEA → SJC Jul 22, 01:20 UTCJul 22, 03:45 UTC2h 25m
2026-07-21 SKW3250 - Jul 21, 21:35 UTCJul 22, 00:10 UTC2h 35m
2026-07-21 SKW3426 SFO → SAN Jul 21, 18:55 UTCJul 21, 20:10 UTC1h 15m
2026-07-21 SKW3463 SAN → SFO Jul 21, 16:25 UTCJul 21, 17:29 UTC1h 4m
2026-07-21 SKW3463 - Jul 21, 16:25 UTCJul 21, 17:30 UTC1h 5m
2026-07-21 SKW3293 AUS → SAN Jul 21, 11:25 UTCJul 21, 13:55 UTC2h 30m
2026-07-21 SKW3292 ORD → BNA Jul 21, 01:50 UTCJul 21, 04:50 UTC3h 0m
2026-07-20 SKW3429 - Jul 20, 23:35 UTCJul 21, 00:45 UTC1h 10m
2026-07-20 SKW918J - Jul 20, 21:25 UTCJul 20, 22:25 UTC1h 0m
2026-07-20 SKW3047 DTW → ORD Jul 20, 18:55 UTCJul 20, 20:25 UTC1h 30m
2026-07-20 SKW3047 DTW → ORD Jul 20, 18:22 UTCJul 20, 20:10 UTC1h 48m
2026-07-20 SKW3233 PHX → OKC Jul 20, 15:50 UTCJul 20, 17:00 UTC1h 10m
2026-07-20 SKW3455 - Jul 20, 13:20 UTCJul 20, 14:35 UTC1h 15m
2026-07-20 SKW3067 - Jul 20, 06:30 UTCJul 20, 07:20 UTC50m
2026-07-20 SKW3072 SAN → SFO Jul 20, 03:15 UTCJul 20, 05:10 UTC1h 55m
2026-07-20 SKW3227 SFO → RDM Jul 20, 01:20 UTCJul 20, 02:20 UTC1h 0m
2026-07-19 SKW3269 SMF → LAX Jul 19, 23:10 UTCJul 20, 00:10 UTC1h 0m
2026-07-19 SKW3237 - Jul 19, 20:10 UTCJul 19, 21:20 UTC1h 10m

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 N171SY page for operator, model, and routing details .

Mode-S A11E8B frequently asked

What is Mode-S code A11E8B?
A11E8B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N171SY.
Where is Mode-S A11E8B registered?
Mode-S code A11E8B 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 A11E8B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A11E8B, octal 50217213, decimal 10,559,115.
What flights does A11E8B operate?
Mode-S A11E8B has broadcast 20 distinct callsigns, including SKW3064, SKW3433, SKW3075, SKW3054, SKW3293.