Apparatus

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sensors Mode-S transponder

A2FAD8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N291SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A2FAD8
Octal
50575330
Decimal
10,681,048
Country
US
Tail
N291SY
Type
E75L
Broadcasting now · callsign SKW3892 · 18,625 ft
Flights observed
681
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Current position

A2FAD8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A2FAD8 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
SKW3887 SkyWest Airlines 15 2026-07-24
SKW3736 SkyWest Airlines 13 2026-07-24
SKW3735 - 13 2026-07-17
SKW132K SkyWest Airlines 13 2026-07-24
SKW4125 - 11 2026-07-15
SKW3824 SkyWest Airlines 11 2026-05-29
SKW4153 SkyWest Airlines 10 2026-07-25
SKW4141 - 10 2026-07-11
SKW3918 - 10 2026-07-16
SKW3857 - 10 2026-06-30
SKW3748 - 10 2026-07-16
SKW4454 SkyWest Airlines 9 2026-06-05
SKW3749 - 9 2026-07-17
SKW4052 SkyWest Airlines 8 2026-06-07
SKW4048 SkyWest Airlines 8 2026-06-05
SKW3992 - 8 2026-07-18
SKW3955 SkyWest Airlines 8 2026-05-31
SKW3895 SkyWest Airlines 8 2026-06-06
SKW3873 - 8 2026-07-17
SKW3816 SkyWest Airlines 8 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3833 ICT → MSP Jul 26, 21:10 UTCJul 26, 22:00 UTC50m
2026-07-26 SKW3833 ICT → MSP Jul 26, 18:55 UTCJul 26, 19:50 UTC55m
2026-07-26 SKW3874 OMA → SLC Jul 26, 15:45 UTCJul 26, 17:50 UTC2h 5m
2026-07-25 SKW3706 BNA → JFK Jul 25, 23:51 UTCJul 26, 01:28 UTC1h 37m
2026-07-25 SKW3706 BNA → JFK Jul 25, 23:45 UTCJul 26, 01:40 UTC1h 55m
2026-07-25 SKW3801 JFK → IAD Jul 25, 21:20 UTCJul 25, 22:45 UTC1h 25m
2026-07-25 SKW3801 JFK → IAD Jul 25, 21:18 UTCJul 25, 22:43 UTC1h 25m
2026-07-25 SKW3779 OAK → SLC Jul 25, 18:31 UTCJul 25, 19:39 UTC1h 8m
2026-07-25 SKW3779 OAK → SLC Jul 25, 18:40 UTCJul 25, 19:55 UTC1h 15m
2026-07-25 SKW3816 SEA → SFO Jul 25, 13:50 UTCJul 25, 16:05 UTC2h 15m
2026-07-25 SKW3816 SEA → SFO Jul 25, 13:28 UTCJul 25, 16:00 UTC2h 32m
2026-07-25 SKW3884 SEA → SMF Jul 25, 03:10 UTCJul 25, 05:30 UTC2h 20m
2026-07-25 SKW4153 OAK → LAX Jul 25, 00:30 UTCJul 25, 02:00 UTC1h 30m
2026-07-24 SKW4153 OAK → LAX Jul 24, 21:55 UTCJul 24, 23:35 UTC1h 40m
2026-07-24 SKW3736 SJC → SEA Jul 24, 18:50 UTCJul 24, 20:25 UTC1h 35m
2026-07-24 SKW3736 SJC → SEA Jul 24, 16:10 UTCJul 24, 18:05 UTC1h 55m
2026-07-24 SKW194R YVR → SEA Jul 24, 13:30 UTCJul 24, 13:54 UTC24m
2026-07-24 SKW194R YVR → SEA Jul 24, 13:30 UTCJul 24, 13:55 UTC25m
2026-07-24 SKW162Z SEA → YVR Jul 24, 05:00 UTCJul 24, 05:40 UTC40m
2026-07-24 SKW3887 SLC → OAK Jul 24, 03:05 UTCJul 24, 03:32 UTC27m
2026-07-24 SKW3887 SLC → OAK Jul 24, 03:05 UTCJul 24, 03:35 UTC30m
2026-07-24 SKW132K SEA → YVR Jul 24, 01:25 UTCJul 24, 02:00 UTC35m
2026-07-23 SKW3789 SJC → SEA Jul 23, 22:30 UTCJul 24, 00:15 UTC1h 45m
2026-07-23 SKW168F SEA → SJC Jul 23, 19:15 UTCJul 23, 21:20 UTC2h 5m
2026-07-23 SKW156H GEG → SEA Jul 23, 16:45 UTCJul 23, 17:35 UTC50m
2026-07-23 SKW3830 OAK → LAX Jul 23, 14:35 UTCJul 23, 15:20 UTC45m
2026-07-23 SKW4008 DTW → MKE Jul 23, 12:40 UTCJul 23, 13:10 UTC30m
2026-07-23 SKW4472 SEA → PDX Jul 23, 06:20 UTCJul 23, 06:50 UTC30m
2026-07-23 SKW3923 OAK → LAX Jul 23, 04:45 UTCJul 23, 05:20 UTC35m
2026-07-23 SKW3923 OAK → LAX Jul 23, 02:20 UTCJul 23, 03:05 UTC45m
2026-07-22 SKW4165 MSN → MSP Jul 22, 23:45 UTCJul 23, 00:35 UTC50m
2026-07-22 SKW4145 SEA → GEG Jul 22, 22:10 UTCJul 22, 22:55 UTC45m
2026-07-22 SKW4145 SEA → GEG Jul 22, 22:10 UTCJul 22, 22:50 UTC40m
2026-07-22 SKW3736 SJC → SEA Jul 22, 18:50 UTCJul 22, 20:25 UTC1h 35m
2026-07-22 SKW3736 SJC → SEA Jul 22, 15:55 UTCJul 22, 17:50 UTC1h 55m
2026-07-22 SKW194R YVR → SEA Jul 22, 13:30 UTCJul 22, 14:05 UTC35m
2026-07-22 SKW3584 SLC → TUL Jul 22, 03:55 UTCJul 22, 05:25 UTC1h 30m
2026-07-22 SKW3728 MSP → SDF Jul 22, 00:30 UTCJul 22, 01:50 UTC1h 20m
2026-07-21 SKW3728 MSP → SDF Jul 21, 22:05 UTCJul 21, 23:10 UTC1h 5m
2026-07-21 SKW3727 SLC → RDM Jul 21, 19:20 UTCJul 21, 20:45 UTC1h 25m
2026-07-21 SKW3727 SLC → RDM Jul 21, 16:55 UTCJul 21, 18:15 UTC1h 20m
2026-07-21 SKW3607 SJC → LAX Jul 21, 14:35 UTCJul 21, 15:25 UTC50m
2026-07-21 SKW3607 SJC → LAX Jul 21, 14:37 UTCJul 21, 15:19 UTC42m
2026-07-21 SKW4446 SLC → BOI Jul 21, 03:00 UTCJul 21, 03:45 UTC45m
2026-07-20 SKW3798 JFK → BNA Jul 20, 23:50 UTCJul 21, 01:05 UTC1h 14m
2026-07-20 SKW3798 JFK → BNA Jul 20, 23:39 UTCJul 21, 00:53 UTC1h 14m
2026-07-20 SKW3798 JFK → BNA Jul 20, 21:20 UTCJul 20, 22:25 UTC1h 5m
2026-07-20 SKW4019 SLC → ABQ Jul 20, 19:40 UTCJul 20, 20:10 UTC30m
2026-07-20 SKW172E SLC → SUN Jul 20, 17:35 UTCJul 20, 18:00 UTC25m
2026-07-20 SKW4037 SUN → SLC Jul 20, 13:30 UTCJul 20, 14:00 UTC30m

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 N291SY page for operator, model, and routing details .

Mode-S A2FAD8 frequently asked

What is Mode-S code A2FAD8?
A2FAD8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N291SY.
Where is Mode-S A2FAD8 registered?
Mode-S code A2FAD8 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 A2FAD8 broadcasting right now?
Yes. Mode-S A2FAD8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2FAD8, octal 50575330, decimal 10,681,048.
What flights does A2FAD8 operate?
Mode-S A2FAD8 has broadcast 20 distinct callsigns, including SKW3887, SKW3736, SKW3735, SKW132K, SKW4125.