Apparatus

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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 13h ago
Flights observed
570
Distinct callsigns
20
Country
US
Last broadcast
13h ago

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 - 18 2026-07-11
SKW3995 - 12 2026-07-07
SKW3709 - 11 2026-06-20
SKW3785 - 10 2026-07-02
SKW3898 SkyWest Airlines 9 2026-04-23
SKW4123 SkyWest Airlines 8 2026-04-29
SKW4040 - 8 2026-06-25
SKW3967 - 8 2026-07-12
SKW3831 - 8 2026-06-30
SKW4066 - 7 2026-07-06
SKW3988 SkyWest Airlines 7 2026-06-14
SKW3912 - 7 2026-07-13
SKW3861 - 7 2026-07-13
SKW3811 SkyWest Airlines 7 2026-06-03
SKW4140 - 6 2026-07-05
SKW4136 SkyWest Airlines 6 2026-06-04
SKW4120 - 6 2026-06-24
SKW4065 SkyWest Airlines 6 2026-06-18
SKW3984 - 6 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SKW3912 - Jul 13, 23:35 UTCJul 13, 23:55 UTC20m
2026-07-13 SKW3861 ATW → MSP Jul 13, 21:20 UTCJul 13, 22:05 UTC45m
2026-07-13 SKW3861 MSP → ATW Jul 13, 19:25 UTCJul 13, 20:10 UTC45m
2026-07-13 SKW4102 - Jul 13, 17:15 UTCJul 13, 17:55 UTC40m
2026-07-13 SKW4102 - Jul 13, 15:25 UTCJul 13, 16:10 UTC45m
2026-07-13 SKW3922 DLH → MSP Jul 13, 13:05 UTCJul 13, 13:40 UTC35m
2026-07-13 SKW3912 MSP → SUW Jul 13, 01:15 UTCJul 13, 01:40 UTC25m
2026-07-12 SKW3967 - Jul 12, 22:20 UTCJul 12, 23:50 UTC1h 30m
2026-07-12 SKW3967 - Jul 12, 19:40 UTCJul 12, 20:35 UTC55m
2026-07-12 SKW149R YYZ → MSP Jul 12, 16:45 UTCJul 12, 18:20 UTC1h 35m
2026-07-12 SKW3868 MSP → YYZ Jul 12, 13:50 UTCJul 12, 15:25 UTC1h 35m
2026-07-12 SKW3864 - Jul 12, 11:35 UTCJul 12, 12:25 UTC50m
2026-07-12 SKW4014 - Jul 12, 03:01 UTCJul 12, 03:45 UTC45m
2026-07-11 SKW3849 - Jul 11, 21:20 UTCJul 11, 22:10 UTC50m
2026-07-11 SKW3849 - Jul 11, 19:40 UTCJul 11, 20:25 UTC45m
2026-07-11 SKW3971 - Jul 11, 17:30 UTCJul 11, 18:35 UTC1h 5m
2026-07-11 SKW3971 RAP → MSP Jul 11, 17:26 UTCJul 11, 18:34 UTC1h 8m
2026-07-11 SKW3971 - Jul 11, 14:45 UTCJul 11, 15:45 UTC1h 0m
2026-07-11 SKW3922 SUW → MSP Jul 11, 13:15 UTCJul 11, 13:45 UTC30m
2026-07-10 SKW3912 - Jul 10, 23:50 UTCJul 11, 00:10 UTC20m
2026-07-10 SKW3861 - Jul 10, 22:00 UTCJul 10, 22:45 UTC45m
2026-07-10 SKW3861 MSP → ATW Jul 10, 20:20 UTCJul 10, 21:05 UTC46m
2026-07-10 SKW3971 - Jul 10, 18:10 UTCJul 10, 19:10 UTC1h 0m
2026-07-10 SKW3971 RAP → MSP Jul 10, 18:00 UTCJul 10, 19:09 UTC1h 9m
2026-07-10 SKW3971 - Jul 10, 15:00 UTCJul 10, 16:00 UTC1h 0m
2026-07-10 SKW3922 - Jul 10, 13:15 UTCJul 10, 13:45 UTC30m
2026-07-09 SKW3912 - Jul 9, 23:50 UTCJul 10, 00:10 UTC20m
2026-07-09 SKW3861 - Jul 9, 21:20 UTCJul 9, 22:05 UTC45m
2026-07-09 SKW3861 ATW → MSP Jul 9, 21:31 UTCJul 9, 22:04 UTC33m
2026-07-09 SKW3861 MSP → ATW Jul 9, 19:30 UTCJul 9, 20:15 UTC45m
2026-07-09 SKW4102 - Jul 9, 17:35 UTCJul 9, 18:15 UTC40m
2026-07-09 SKW4102 MSN → MSP Jul 9, 17:30 UTCJul 9, 18:13 UTC43m
2026-07-09 SKW4102 MSP → MSN Jul 9, 16:00 UTCJul 9, 16:35 UTC35m
2026-07-09 SKW3922 - Jul 9, 14:30 UTCJul 9, 15:00 UTC30m
2026-07-09 SKW3912 - Jul 9, 00:10 UTCJul 9, 00:30 UTC20m
2026-07-08 SKW3843 - Jul 8, 21:55 UTCJul 8, 22:40 UTC45m
2026-07-08 SKW3843 - Jul 8, 19:50 UTCJul 8, 20:35 UTC45m
2026-07-08 SKW3971 - Jul 8, 17:20 UTCJul 8, 18:25 UTC1h 5m
2026-07-08 SKW3971 - Jul 8, 15:00 UTCJul 8, 16:00 UTC1h 0m
2026-07-08 SKW3835 - Jul 8, 11:20 UTCJul 8, 12:25 UTC1h 5m
2026-07-08 SKW3835 SBN → MSP Jul 8, 11:27 UTCJul 8, 12:20 UTC53m
2026-07-08 SKW3886 MSP → SBN Jul 8, 01:15 UTCJul 8, 02:15 UTC1h 0m
2026-07-07 SKW3538 - Jul 7, 22:00 UTCJul 7, 22:35 UTC35m
2026-07-07 SKW3538 - Jul 7, 20:05 UTCJul 7, 20:30 UTC25m
2026-07-07 SKW3995 - Jul 7, 18:00 UTCJul 7, 19:00 UTC1h 0m
2026-07-07 SKW3995 TVC → MSP Jul 7, 17:57 UTCJul 7, 18:56 UTC59m
2026-07-07 SKW3995 - Jul 7, 15:45 UTCJul 7, 16:35 UTC50m
2026-07-07 SKW4103 OAK → SLC Jul 7, 14:00 UTCJul 7, 14:45 UTC45m
2026-07-07 SKW4103 OAK → SLC Jul 7, 12:15 UTCJul 7, 12:55 UTC40m
2026-07-07 SKW3840 - Jul 7, 10:25 UTCJul 7, 11:05 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 13h ago.
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, SKW3995, SKW3709, SKW3785.