Apparatus

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sensors Mode-S transponder

A33743

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N306SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A33743
Octal
50633503
Decimal
10,696,515
Country
US
Tail
N306SY
Type
E75L
No current signal · last broadcast 2h ago
Flights observed
638
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A33743.

Country allocation

The ICAO 24-bit address A33743 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
SKW3999 SkyWest Airlines 12 2026-06-09
SKW3954 - 10 2026-07-07
SKW4043 - 9 2026-06-23
SKW3966 - 9 2026-06-22
SKW3902 - 9 2026-07-09
SKW3881 SkyWest Airlines 9 2026-07-07
SKW4127 - 8 2026-07-08
SKW4017 - 8 2026-06-23
SKW3972 - 8 2026-06-23
SKW3916 SkyWest Airlines 8 2026-05-22
SKW3883 - 8 2026-07-09
SKW3842 - 8 2026-06-13
SKW3750 SkyWest Airlines 8 2026-06-17
SKW4145 - 7 2026-07-07
SKW4119 SkyWest Airlines 7 2026-06-12
SKW4087 - 7 2026-06-18
SKW4070 - 7 2026-07-13
SKW4031 - 7 2026-07-13
SKW3991 - 7 2026-06-17
SKW3953 - 7 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW3789 SJC → SEA Jul 14, 22:15 UTCJul 14, 23:55 UTC1h 39m
2026-07-14 SKW168F - Jul 14, 19:25 UTCJul 14, 21:25 UTC2h 0m
2026-07-14 SKW156H GEG → SEA Jul 14, 16:44 UTCJul 14, 17:30 UTC46m
2026-07-14 SKW156H GEG → SEA Jul 14, 16:40 UTCJul 14, 17:30 UTC50m
2026-07-14 SKW3830 SEA → GEG Jul 14, 14:29 UTCJul 14, 15:20 UTC51m
2026-07-14 SKW3830 SEA → GEG Jul 14, 14:45 UTCJul 14, 15:20 UTC35m
2026-07-14 SKW4008 - Jul 14, 12:40 UTCJul 14, 13:05 UTC25m
2026-07-14 SKW3913 SEA → PDX Jul 14, 04:40 UTCJul 14, 05:20 UTC40m
2026-07-14 SKW3688 - Jul 14, 02:30 UTCJul 14, 03:35 UTC1h 5m
2026-07-13 SKW3688 - Jul 13, 23:30 UTCJul 14, 00:40 UTC1h 10m
2026-07-13 SKW4070 ONT → SEA Jul 13, 19:10 UTCJul 13, 21:05 UTC1h 55m
2026-07-13 SKW4070 ONT → SEA Jul 13, 19:16 UTCJul 13, 21:05 UTC1h 49m
2026-07-13 SKW4070 SEA → ONT Jul 13, 15:45 UTCJul 13, 18:20 UTC2h 35m
2026-07-13 SKW4036 - Jul 13, 13:40 UTCJul 13, 14:20 UTC40m
2026-07-13 SKW4047 - Jul 13, 05:15 UTCJul 13, 05:55 UTC40m
2026-07-13 SKW4031 POC → SEA Jul 13, 01:15 UTCJul 13, 03:15 UTC2h 0m
2026-07-13 SKW4031 ONT → SEA Jul 13, 01:21 UTCJul 13, 03:11 UTC1h 50m
2026-07-12 SKW4031 SEA → ONT Jul 12, 21:55 UTCJul 13, 00:25 UTC2h 30m
2026-07-12 SKW4139 EUG → SEA Jul 12, 19:50 UTCJul 12, 20:25 UTC35m
2026-07-12 SKW155A - Jul 12, 17:05 UTCJul 12, 18:45 UTC1h 40m
2026-07-12 SKW155A SLC → EUG Jul 12, 17:10 UTCJul 12, 18:41 UTC1h 31m
2026-07-12 SKW4152 ABQ → SLC Jul 12, 14:10 UTCJul 12, 15:25 UTC1h 15m
2026-07-12 SKW4152 ABQ → SLC Jul 12, 14:05 UTCJul 12, 15:20 UTC1h 15m
2026-07-12 SKW3729 SLC → ABQ Jul 12, 03:05 UTCJul 12, 04:25 UTC1h 20m
2026-07-12 SKW160Y - Jul 12, 01:15 UTCJul 12, 01:50 UTC35m
2026-07-12 SKW160Y IDA → SLC Jul 12, 01:10 UTCJul 12, 01:40 UTC30m
2026-07-11 SKW3895 - Jul 11, 23:30 UTCJul 11, 23:55 UTC25m
2026-07-11 SKW3908 AUS → SLC Jul 11, 19:55 UTCJul 11, 22:15 UTC2h 20m
2026-07-11 SKW3908 SLC → AUS Jul 11, 15:45 UTCJul 11, 18:10 UTC2h 25m
2026-07-11 SKW3856 - Jul 11, 03:15 UTCJul 11, 04:45 UTC1h 30m
2026-07-11 SKW3856 SNA → SLC Jul 11, 02:56 UTCJul 11, 04:36 UTC1h 40m
2026-07-11 SKW4179 - Jul 11, 01:15 UTCJul 11, 01:55 UTC40m
2026-07-10 SKW3751 - Jul 10, 23:10 UTCJul 11, 00:10 UTC1h 0m
2026-07-10 SKW4001 - Jul 10, 21:45 UTCJul 10, 22:15 UTC30m
2026-07-10 SKW4108 - Jul 10, 18:50 UTCJul 10, 20:25 UTC1h 35m
2026-07-10 SKW4108 - Jul 10, 15:35 UTCJul 10, 17:10 UTC1h 35m
2026-07-10 SKW4057 - Jul 10, 13:15 UTCJul 10, 14:15 UTC1h 0m
2026-07-10 SKW3827 LAX → PHX Jul 10, 06:00 UTCJul 10, 07:05 UTC1h 5m
2026-07-10 SKW4077 - Jul 10, 03:55 UTCJul 10, 04:55 UTC1h 0m
2026-07-10 SKW4077 - Jul 10, 01:05 UTCJul 10, 02:10 UTC1h 5m
2026-07-09 SKW3902 - Jul 9, 23:05 UTCJul 10, 00:10 UTC1h 5m
2026-07-09 SKW3902 - Jul 9, 20:10 UTCJul 9, 21:00 UTC50m
2026-07-09 SKW4099 - Jul 9, 18:00 UTCJul 9, 19:05 UTC1h 5m
2026-07-09 SKW4099 - Jul 9, 15:35 UTCJul 9, 16:30 UTC55m
2026-07-09 SKW3743 - Jul 9, 13:40 UTCJul 9, 14:10 UTC30m
2026-07-09 SKW3743 SAN → LAX Jul 9, 13:36 UTCJul 9, 14:05 UTC29m
2026-07-09 SKW3746 - Jul 9, 06:45 UTCJul 9, 07:15 UTC30m
2026-07-09 SKW3746 LAX → SAN Jul 9, 06:34 UTCJul 9, 07:10 UTC36m
2026-07-09 SKW3883 SJC → LAX Jul 9, 04:25 UTCJul 9, 05:25 UTC1h 0m
2026-07-09 SKW3883 SJC → LAX Jul 9, 04:31 UTCJul 9, 05:10 UTC39m

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 N306SY page for operator, model, and routing details .

Mode-S A33743 frequently asked

What is Mode-S code A33743?
A33743 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N306SY.
Where is Mode-S A33743 registered?
Mode-S code A33743 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 A33743 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A33743, octal 50633503, decimal 10,696,515.
What flights does A33743 operate?
Mode-S A33743 has broadcast 20 distinct callsigns, including SKW3999, SKW3954, SKW4043, SKW3966, SKW3902.