Apparatus

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sensors Mode-S transponder

A324B0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N301SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A324B0
Octal
50622260
Decimal
10,691,760
Country
US
Tail
N301SY
Type
E75L
No current signal · last broadcast 1h ago
Flights observed
627
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A324B0.

Country allocation

The ICAO 24-bit address A324B0 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
SKW3736 SkyWest Airlines 20 2026-07-09
SKW3897 - 19 2026-07-12
SKW4141 - 16 2026-07-13
SKW4031 SkyWest Airlines 14 2026-05-30
SKW3857 - 14 2026-07-10
SKW3992 SkyWest Airlines 11 2026-05-30
SKW3809 SkyWest Airlines 11 2026-04-25
SKW3735 - 11 2026-07-13
SKW3718 SkyWest Airlines 10 2026-06-16
SKW4125 SkyWest Airlines 9 2026-05-16
SKW3903 SkyWest Airlines 9 2026-04-26
SKW3859 - 9 2026-07-02
SKW3777 SkyWest Airlines 9 2026-05-14
SKW3768 - 9 2026-06-24
SKW3708 SkyWest Airlines 9 2026-06-03
SKW194R - 9 2026-07-11
SKW146A - 9 2026-07-11
SKW4047 SkyWest Airlines 8 2026-05-30
SKW3880 SkyWest Airlines 8 2026-04-25
SKW3719 SkyWest Airlines 8 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW4131 SEA → SMF Jul 14, 03:40 UTCJul 14, 05:25 UTC1h 45m
2026-07-14 SKW3968 - Jul 14, 01:20 UTCJul 14, 01:55 UTC35m
2026-07-13 SKW3733 SEA → YVR Jul 13, 23:15 UTCJul 13, 23:40 UTC25m
2026-07-13 SKW3735 - Jul 13, 20:40 UTCJul 13, 21:20 UTC40m
2026-07-13 SKW3735 SEA → RDM Jul 13, 18:30 UTCJul 13, 19:15 UTC45m
2026-07-13 SKW3749 - Jul 13, 16:15 UTCJul 13, 17:10 UTC55m
2026-07-13 SKW3749 LWS → SEA Jul 13, 16:16 UTCJul 13, 16:54 UTC38m
2026-07-13 SKW3873 - Jul 13, 05:25 UTCJul 13, 06:05 UTC40m
2026-07-13 SKW4141 - Jul 13, 02:40 UTCJul 13, 03:20 UTC40m
2026-07-13 SKW4141 RDM → SEA Jul 13, 02:45 UTCJul 13, 03:20 UTC35m
2026-07-13 SKW4141 SEA → RDM Jul 13, 00:40 UTCJul 13, 01:30 UTC50m
2026-07-12 SKW4062 - Jul 12, 22:40 UTCJul 12, 23:05 UTC25m
2026-07-12 SKW4062 SEA → PDX Jul 12, 21:00 UTCJul 12, 21:35 UTC35m
2026-07-12 SKW3953 - Jul 12, 16:40 UTCJul 12, 17:15 UTC35m
2026-07-12 SKW3953 SEA → PDX Jul 12, 14:50 UTCJul 12, 15:20 UTC30m
2026-07-12 SKW4008 PDX → SEA Jul 12, 12:45 UTCJul 12, 13:15 UTC30m
2026-07-12 SKW3913 - Jul 12, 04:05 UTCJul 12, 04:35 UTC30m
2026-07-12 SKW3897 SJC → SEA Jul 12, 01:05 UTCJul 12, 02:45 UTC1h 40m
2026-07-11 SKW3897 SEA → SJC Jul 11, 22:10 UTCJul 12, 00:10 UTC2h 0m
2026-07-11 SKW112J YVR → SEA Jul 11, 18:35 UTCJul 11, 19:05 UTC30m
2026-07-11 SKW123J SEA → YVR Jul 11, 16:45 UTCJul 11, 17:25 UTC40m
2026-07-11 SKW123J SEA → YVR Jul 11, 16:39 UTCJul 11, 17:09 UTC30m
2026-07-11 SKW194R YVR → SEA Jul 11, 13:25 UTCJul 11, 13:55 UTC30m
2026-07-11 SKW146A KEH → YVR Jul 11, 03:30 UTCJul 11, 04:01 UTC30m
2026-07-11 SKW146A SEA → YVR Jul 11, 03:15 UTCJul 11, 04:00 UTC45m
2026-07-11 SKW3918 - Jul 11, 01:05 UTCJul 11, 01:30 UTC25m
2026-07-10 SKW3918 SEA → PDX Jul 10, 23:25 UTCJul 10, 23:55 UTC30m
2026-07-10 SKW3735 - Jul 10, 20:35 UTCJul 10, 21:20 UTC45m
2026-07-10 SKW3735 SEA → RDM Jul 10, 18:50 UTCJul 10, 19:35 UTC45m
2026-07-10 SKW3740 - Jul 10, 14:50 UTCJul 10, 16:00 UTC1h 10m
2026-07-10 SKW3692 - Jul 10, 02:50 UTCJul 10, 03:50 UTC1h 0m
2026-07-10 SKW3692 SEA → BOI Jul 10, 02:54 UTCJul 10, 03:50 UTC56m
2026-07-10 SKW3857 GEG → SEA Jul 10, 00:45 UTCJul 10, 01:30 UTC45m
2026-07-09 SKW3857 SEA → GEG Jul 9, 23:00 UTCJul 9, 23:40 UTC40m
2026-07-09 SKW3736 SJC → SEA Jul 9, 18:40 UTCJul 9, 20:30 UTC1h 50m
2026-07-09 SKW3736 SJC → SEA Jul 9, 15:55 UTCJul 9, 17:40 UTC1h 45m
2026-07-09 SKW194R YVR → SEA Jul 9, 13:40 UTCJul 9, 14:05 UTC25m
2026-07-09 SKW146A SEA → YVR Jul 9, 03:13 UTCJul 9, 03:46 UTC33m
2026-07-09 SKW146A SEA → YVR Jul 9, 03:20 UTCJul 9, 04:00 UTC40m
2026-07-09 SKW3918 - Jul 9, 01:00 UTCJul 9, 01:35 UTC35m
2026-07-08 SKW3918 SEA → PDX Jul 8, 23:25 UTCJul 8, 23:50 UTC25m
2026-07-08 SKW4070 MSP → MSN Jul 8, 19:05 UTCJul 8, 21:25 UTC2h 20m
2026-07-08 SKW4070 MSP → MSN Jul 8, 15:55 UTCJul 8, 18:10 UTC2h 15m
2026-07-08 SKW4128 EUG → SEA Jul 8, 13:25 UTCJul 8, 14:10 UTC45m
2026-07-08 SKW3855 SEA → EUG Jul 8, 05:55 UTCJul 8, 06:40 UTC45m
2026-07-08 SKW3832 - Jul 8, 04:20 UTCJul 8, 05:05 UTC45m
2026-07-08 SKW3832 SEA → GEG Jul 8, 02:50 UTCJul 8, 03:30 UTC40m
2026-07-07 SKW3891 - Jul 7, 22:50 UTCJul 7, 23:25 UTC35m
2026-07-07 SKW3891 - Jul 7, 21:15 UTCJul 7, 21:45 UTC30m
2026-07-07 SKW3824 - Jul 7, 18:55 UTCJul 7, 19:40 UTC45m

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 N301SY page for operator, model, and routing details .

Mode-S A324B0 frequently asked

What is Mode-S code A324B0?
A324B0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N301SY.
Where is Mode-S A324B0 registered?
Mode-S code A324B0 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 A324B0 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A324B0, octal 50622260, decimal 10,691,760.
What flights does A324B0 operate?
Mode-S A324B0 has broadcast 20 distinct callsigns, including SKW3736, SKW3897, SKW4141, SKW4031, SKW3857.