Apparatus

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sensors Mode-S transponder

A389F8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N327SY · operated by SKYWEST AIRLINES INC

Hex
A389F8
Octal
50704770
Decimal
10,717,688
Country
US
Tail
N327SY
Type
E75L
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
697
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A389F8.

Country allocation

The ICAO 24-bit address A389F8 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
SKW3832 SkyWest Airlines 17 2026-07-26
SKW4100 - 15 2026-07-21
SKW4444 SkyWest Airlines 14 2026-07-25
SKW4031 - 14 2026-07-09
SKW3824 SkyWest Airlines 13 2026-07-26
SKW4070 - 12 2026-07-19
SKW3790 SkyWest Airlines 12 2026-07-26
SKW3783 SkyWest Airlines 12 2026-06-04
SKW4145 SkyWest Airlines 11 2026-05-09
SKW4105 SkyWest Airlines 9 2026-06-03
SKW4177 SkyWest Airlines 8 2026-05-24
SKW3857 SkyWest Airlines 8 2026-07-20
SKW4174 SkyWest Airlines 7 2026-07-25
SKW4047 - 7 2026-07-09
SKW3802 - 7 2026-06-23
SKW3750 - 7 2026-07-05
SKW4121 SkyWest Airlines 6 2026-05-27
SKW4067 SkyWest Airlines 6 2026-05-22
SKW4063 SkyWest Airlines 6 2026-06-03
SKW4036 - 6 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3891 LAX → OAK Jul 26, 21:00 UTCJul 26, 21:30 UTC30m
2026-07-26 SKW3824 BMI → ATL Jul 26, 18:45 UTCJul 26, 19:30 UTC45m
2026-07-26 SKW3824 BMI → ATL Jul 26, 16:55 UTCJul 26, 17:35 UTC40m
2026-07-26 SKW3790 RIC → DTW Jul 26, 14:15 UTCJul 26, 15:00 UTC45m
2026-07-26 SKW3832 GEG → SEA Jul 26, 01:30 UTCJul 26, 02:10 UTC40m
2026-07-26 SKW3832 GEG → SEA Jul 26, 01:12 UTCJul 26, 02:07 UTC55m
2026-07-25 SKW4174 RST → MSP Jul 25, 20:00 UTCJul 25, 23:35 UTC3h 35m
2026-07-25 SKW4444 SLC → GEG Jul 25, 16:55 UTCJul 25, 18:20 UTC1h 25m
2026-07-25 SKW4444 SLC → GEG Jul 25, 14:30 UTCJul 25, 15:50 UTC1h 20m
2026-07-25 SKW4449 SLC → COS Jul 25, 01:31 UTCJul 25, 02:46 UTC1h 15m
2026-07-25 SKW4449 SLC → COS Jul 25, 01:30 UTCJul 25, 02:50 UTC1h 20m
2026-07-24 SKW4449 SLC → COS Jul 24, 22:30 UTCJul 25, 00:00 UTC1h 30m
2026-07-24 SKW3804 ROC → DTW Jul 24, 20:00 UTCJul 24, 21:15 UTC1h 15m
2026-07-24 SKW3804 ROC → DTW Jul 24, 17:05 UTCJul 24, 18:25 UTC1h 20m
2026-07-24 SKW4237 PLN → DTW Jul 24, 15:05 UTCJul 24, 15:55 UTC50m
2026-07-23 SKW4263 SLC → SGU Jul 23, 23:50 UTCJul 24, 00:15 UTC25m
2026-07-23 SKW3765 LAX → SJC Jul 23, 21:50 UTCJul 23, 22:25 UTC35m
2026-07-23 SKW3765 LAX → SJC Jul 23, 19:50 UTCJul 23, 20:20 UTC30m
2026-07-23 SKW4444 SLC → GEG Jul 23, 16:55 UTCJul 23, 18:15 UTC1h 20m
2026-07-23 SKW4444 SLC → GEG Jul 23, 14:35 UTCJul 23, 16:00 UTC1h 25m
2026-07-23 SKW3856 SJC → SEA Jul 23, 02:15 UTCJul 23, 03:45 UTC1h 30m
2026-07-22 SKW3856 SJC → SEA Jul 22, 23:40 UTCJul 23, 01:10 UTC1h 30m
2026-07-22 SKW3916 ELM → DTW Jul 22, 21:50 UTCJul 22, 22:30 UTC40m
2026-07-22 SKW4104 ORD → JFK Jul 22, 19:15 UTCJul 22, 22:00 UTC2h 45m
2026-07-22 SKW4104 ORD → JFK Jul 22, 18:48 UTCJul 22, 20:36 UTC1h 48m
2026-07-22 SKW3781 MFR → SEA Jul 22, 13:25 UTCJul 22, 14:15 UTC50m
2026-07-22 SKW3832 GEG → SEA Jul 22, 03:00 UTCJul 22, 03:50 UTC50m
2026-07-22 SKW3832 GEG → SEA Jul 22, 01:15 UTCJul 22, 01:55 UTC40m
2026-07-21 SKW3789 SJC → SEA Jul 21, 22:05 UTCJul 21, 23:40 UTC1h 35m
2026-07-21 SKW168F SEA → SJC Jul 21, 19:10 UTCJul 21, 21:05 UTC1h 55m
2026-07-21 SKW156H GEG → SEA Jul 21, 17:05 UTCJul 21, 17:55 UTC50m
2026-07-21 SKW3830 OAK → LAX Jul 21, 15:05 UTCJul 21, 15:45 UTC40m
2026-07-21 SKW4100 SJC → SEA Jul 21, 04:15 UTCJul 21, 05:45 UTC1h 30m
2026-07-21 SKW4100 SEA → SJC Jul 21, 01:20 UTCJul 21, 03:10 UTC1h 50m
2026-07-20 SKW3891 - Jul 20, 23:30 UTCJul 21, 00:00 UTC29m
2026-07-20 SKW3891 - Jul 20, 21:45 UTCJul 20, 22:20 UTC35m
2026-07-20 SKW3824 BMI → ATL Jul 20, 18:50 UTCJul 20, 19:45 UTC55m
2026-07-20 SKW3824 BMI → ATL Jul 20, 16:55 UTCJul 20, 17:35 UTC40m
2026-07-20 SKW3790 RIC → DTW Jul 20, 14:15 UTCJul 20, 15:05 UTC50m
2026-07-20 SKW3790 RIC → DTW Jul 20, 14:19 UTCJul 20, 15:00 UTC41m
2026-07-20 SKW3677 BOS → EWR Jul 20, 03:10 UTCJul 20, 03:50 UTC40m
2026-07-20 SKW3857 SJC → SEA Jul 20, 01:12 UTCJul 20, 01:44 UTC32m
2026-07-20 SKW3857 SJC → SEA Jul 20, 01:05 UTCJul 20, 01:55 UTC50m
2026-07-19 SKW3857 SJC → SEA Jul 19, 23:00 UTCJul 19, 23:40 UTC40m
2026-07-19 SKW4070 - Jul 19, 19:10 UTCJul 19, 21:15 UTC2h 5m
2026-07-19 SKW4070 SEA → ONT Jul 19, 15:45 UTCJul 19, 18:05 UTC2h 20m
2026-07-19 SKW194R - Jul 19, 13:35 UTCJul 19, 14:10 UTC35m
2026-07-19 SKW146A ATL → SBN Jul 19, 03:30 UTCJul 19, 03:55 UTC25m
2026-07-19 SKW146A ATL → SBN Jul 19, 03:15 UTCJul 19, 03:55 UTC40m
2026-07-19 SKW3857 SJC → SEA Jul 19, 00:56 UTCJul 19, 01:32 UTC36m

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 N327SY page for operator, model, and routing details .

Mode-S A389F8 frequently asked

What is Mode-S code A389F8?
A389F8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N327SY.
Where is Mode-S A389F8 registered?
Mode-S code A389F8 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 A389F8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A389F8, octal 50704770, decimal 10,717,688.
What flights does A389F8 operate?
Mode-S A389F8 has broadcast 20 distinct callsigns, including SKW3832, SKW4100, SKW4444, SKW4031, SKW3824.