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sensors Mode-S transponder

A8FD5A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N679CA · BOMBARDIER Regional Jet CRJ-900 · operated by DELTA AIR LINES INC

Hex
A8FD5A
Octal
52176532
Decimal
11,074,906
Country
US
Tail
N679CA
Type
CRJ9
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
653
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A8FD5A.

Country allocation

The ICAO 24-bit address A8FD5A 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
SKW4055 SkyWest Airlines 21 2026-06-26
SKW3971 SkyWest Airlines 20 2026-07-20
SKW4102 - 13 2026-07-19
SKW3995 - 12 2026-07-07
SKW3831 - 12 2026-07-21
SKW4120 SkyWest Airlines 11 2026-07-26
SKW3967 SkyWest Airlines 11 2026-07-21
SKW3861 - 11 2026-07-19
SKW3709 - 11 2026-06-20
SKW4040 SkyWest Airlines 10 2026-07-26
SKW3785 - 10 2026-07-02
SKW3898 SkyWest Airlines 9 2026-04-23
SKW4123 SkyWest Airlines 8 2026-04-29
SKW3976 SkyWest Airlines 8 2026-07-24
SKW3912 - 8 2026-07-14
SKW3851 SkyWest Airlines 8 2026-07-20
SKW4136 - 7 2026-07-19
SKW4089 - 7 2026-07-18
SKW4066 - 7 2026-07-06
SKW3988 SkyWest Airlines 7 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4040 ATL → HPN Jul 26, 21:35 UTCJul 26, 22:30 UTC55m
2026-07-26 SKW4040 ATL → HPN Jul 26, 18:45 UTCJul 26, 20:10 UTC1h 25m
2026-07-26 SKW4120 DTW → MEM Jul 26, 16:47 UTCJul 26, 17:25 UTC38m
2026-07-26 SKW4120 DTW → MEM Jul 26, 16:40 UTCJul 26, 17:25 UTC45m
2026-07-26 SKW4120 DTW → MEM Jul 26, 14:35 UTCJul 26, 15:25 UTC50m
2026-07-26 SKW3665 BOI → SLC Jul 26, 12:05 UTCJul 26, 12:55 UTC50m
2026-07-26 SKW3544 MSP → IAD Jul 26, 00:55 UTCJul 26, 01:45 UTC50m
2026-07-25 SKW4151 SJC → SEA Jul 25, 22:10 UTCJul 25, 23:00 UTC50m
2026-07-25 SKW4151 SJC → SEA Jul 25, 22:11 UTCJul 25, 22:55 UTC44m
2026-07-25 SKW4151 SJC → SEA Jul 25, 20:10 UTCJul 25, 20:45 UTC35m
2026-07-25 SKW4157 FAR → MSP Jul 25, 17:15 UTCJul 25, 18:35 UTC1h 20m
2026-07-25 SKW4157 FAR → MSP Jul 25, 14:35 UTCJul 25, 15:55 UTC1h 20m
2026-07-25 SKW3665 BOI → SLC Jul 25, 12:25 UTCJul 25, 13:10 UTC45m
2026-07-25 SKW3544 MSP → IAD Jul 25, 01:00 UTCJul 25, 01:50 UTC50m
2026-07-24 SKW3965 ATL → ABY Jul 24, 22:25 UTCJul 24, 23:00 UTC35m
2026-07-24 SKW3965 ATL → ABY Jul 24, 20:30 UTCJul 24, 21:00 UTC30m
2026-07-24 SKW3976 SDF → MSP Jul 24, 18:50 UTCJul 24, 19:25 UTC35m
2026-07-24 SKW3976 SDF → MSP Jul 24, 16:45 UTCJul 24, 17:15 UTC30m
2026-07-24 SKW4338 PLN → DTW Jul 24, 15:10 UTCJul 24, 15:45 UTC35m
2026-07-24 SKW4338 PLN → DTW Jul 24, 13:15 UTCJul 24, 13:45 UTC30m
2026-07-23 SKW3565 DTW → ORF Jul 23, 21:30 UTCJul 23, 22:25 UTC55m
2026-07-23 SKW3565 DTW → ORF Jul 23, 21:27 UTCJul 23, 22:18 UTC51m
2026-07-23 SKW3565 DTW → ORF Jul 23, 19:20 UTCJul 23, 20:10 UTC50m
2026-07-23 SKW4120 DTW → MEM Jul 23, 16:50 UTCJul 23, 17:45 UTC55m
2026-07-23 SKW4120 DTW → MEM Jul 23, 14:35 UTCJul 23, 15:25 UTC50m
2026-07-23 SKW3817 MOT → MSP Jul 23, 12:35 UTCJul 23, 12:55 UTC20m
2026-07-23 SKW3646 RDM → SEA Jul 23, 03:20 UTCJul 23, 03:40 UTC20m
2026-07-23 SKW3637 LAX → SMF Jul 23, 00:10 UTCJul 23, 01:00 UTC50m
2026-07-22 SKW3637 LAX → SMF Jul 22, 22:15 UTCJul 22, 23:00 UTC45m
2026-07-22 SKW3642 DTW → CMH Jul 22, 20:10 UTCJul 22, 20:55 UTC45m
2026-07-22 SKW3642 DTW → CMH Jul 22, 18:30 UTCJul 22, 19:10 UTC40m
2026-07-22 SKW3636 CLE → BOS Jul 22, 16:45 UTCJul 22, 17:25 UTC40m
2026-07-22 SKW3636 CLE → BOS Jul 22, 14:55 UTCJul 22, 15:35 UTC40m
2026-07-22 SKW3757 SLC → ONT Jul 22, 12:35 UTCJul 22, 13:20 UTC45m
2026-07-21 SKW4464 MSP → MKE Jul 21, 23:30 UTCJul 22, 00:15 UTC45m
2026-07-21 SKW3967 SAN → LAS Jul 21, 20:55 UTCJul 21, 21:55 UTC1h 0m
2026-07-21 SKW3967 SAN → LAS Jul 21, 20:57 UTCJul 21, 21:44 UTC47m
2026-07-21 SKW3967 SAN → LAS Jul 21, 18:05 UTCJul 21, 19:05 UTC1h 0m
2026-07-21 SKW3831 - Jul 21, 16:10 UTCJul 21, 17:00 UTC50m
2026-07-21 SKW3831 - Jul 21, 14:25 UTCJul 21, 15:05 UTC40m
2026-07-21 SKW3702 OMA → LGA Jul 21, 11:25 UTCJul 21, 12:40 UTC1h 15m
2026-07-21 SKW3780 CLT → DTW Jul 21, 01:05 UTCJul 21, 01:55 UTC50m
2026-07-20 SKW3851 LAX → SJC Jul 20, 22:30 UTCJul 20, 23:25 UTC55m
2026-07-20 SKW3851 LAX → SJC Jul 20, 20:00 UTCJul 20, 21:05 UTC1h 5m
2026-07-20 SKW3971 DTW → MKE Jul 20, 17:15 UTCJul 20, 18:15 UTC1h 0m
2026-07-20 SKW3971 DTW → MKE Jul 20, 15:00 UTCJul 20, 16:00 UTC1h 0m
2026-07-20 SKW4073 DTW → HPN Jul 20, 10:50 UTCJul 20, 13:00 UTC2h 10m
2026-07-20 SKW125R MSP → YYZ Jul 20, 01:25 UTCJul 20, 02:55 UTC1h 30m
2026-07-19 SKW3861 - Jul 19, 21:30 UTCJul 19, 22:20 UTC50m
2026-07-19 SKW3861 MSP → ATW Jul 19, 19:40 UTCJul 19, 20:20 UTC40m

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 N679CA page for operator, model, and routing details .

Mode-S A8FD5A frequently asked

What is Mode-S code A8FD5A?
A8FD5A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N679CA.
Where is Mode-S A8FD5A registered?
Mode-S code A8FD5A 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 A8FD5A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8FD5A, octal 52176532, decimal 11,074,906.
What flights does A8FD5A operate?
Mode-S A8FD5A has broadcast 20 distinct callsigns, including SKW4055, SKW3971, SKW4102, SKW3995, SKW3831.