Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
Broadcasting now · callsign SKW3725 · 36,000 ft
Flights observed
697
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:20 UTC

Current position

A33743 is currently broadcasting. Map zoomed to live position.

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
SKW4017 - 9 2026-07-15
SKW3972 - 9 2026-07-15
SKW3966 - 9 2026-06-22
SKW3902 - 9 2026-07-09
SKW3881 SkyWest Airlines 9 2026-07-07
SKW4127 - 8 2026-07-08
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
2026-07-26 SKW4016 ATL → CRW Jul 26, 21:10 UTCJul 26, 22:15 UTC1h 5m
2026-07-26 SKW141E AUS → MSY Jul 26, 18:40 UTCJul 26, 19:55 UTC1h 15m
2026-07-26 SKW3876 SEA → SFO Jul 26, 15:55 UTCJul 26, 17:45 UTC1h 50m
2026-07-26 SKW3876 SEA → SFO Jul 26, 12:40 UTCJul 26, 14:25 UTC1h 45m
2026-07-26 SKW4175 MFE → AUS Jul 26, 10:30 UTCJul 26, 11:20 UTC50m
2026-07-25 SKW4121 MDW → DTW Jul 25, 22:25 UTCJul 25, 23:05 UTC40m
2026-07-25 SKW4121 MDW → DTW Jul 25, 22:22 UTCJul 25, 23:09 UTC47m
2026-07-25 SKW4028 SEA → SFO Jul 25, 18:40 UTCJul 25, 21:00 UTC2h 20m
2026-07-25 SKW4028 SEA → SFO Jul 25, 14:35 UTCJul 25, 17:10 UTC2h 35m
2026-07-25 SKW4088 JFK → BOS Jul 25, 12:05 UTCJul 25, 13:25 UTC1h 20m
2026-07-25 SKW4088 JFK → BOS Jul 25, 11:58 UTCJul 25, 13:16 UTC1h 18m
2026-07-25 SKW3952 ATL → HPN Jul 25, 01:25 UTCJul 25, 02:45 UTC1h 20m
2026-07-24 SKW4053 ATL → EVV Jul 24, 22:40 UTCJul 24, 23:30 UTC50m
2026-07-24 SKW4053 ATL → EVV Jul 24, 20:10 UTCJul 24, 21:00 UTC50m
2026-07-24 SKW3960 DTW → SDF Jul 24, 16:40 UTCJul 24, 18:35 UTC1h 55m
2026-07-24 SKW3960 DTW → SDF Jul 24, 13:40 UTCJul 24, 15:25 UTC1h 45m
2026-07-24 SKW4175 MFE → AUS Jul 24, 10:30 UTCJul 24, 11:25 UTC55m
2026-07-24 SKW4067 AUS → MFE Jul 24, 04:05 UTCJul 24, 04:50 UTC45m
2026-07-24 SKW3945 JFK → ORD Jul 24, 00:05 UTCJul 24, 01:50 UTC1h 45m
2026-07-23 SKW3945 JFK → ORD Jul 23, 20:55 UTCJul 23, 22:45 UTC1h 50m
2026-07-23 SKW3960 DTW → SDF Jul 23, 16:50 UTCJul 23, 18:45 UTC1h 55m
2026-07-23 SKW3960 DTW → SDF Jul 23, 13:55 UTCJul 23, 15:50 UTC1h 55m
2026-07-21 SKW4016 ATL → CRW Jul 21, 21:15 UTCJul 21, 22:20 UTC1h 5m
2026-07-21 SKW141E AUS → MSY Jul 21, 18:40 UTCJul 21, 19:55 UTC1h 15m
2026-07-21 SKW141E AUS → MSY Jul 21, 18:37 UTCJul 21, 19:42 UTC1h 5m
2026-07-21 SKW3876 DEN → AUS Jul 21, 15:45 UTCJul 21, 17:35 UTC1h 50m
2026-07-21 SKW3876 AUS → DEN Jul 21, 12:35 UTCJul 21, 14:20 UTC1h 45m
2026-07-20 SKW4027 - Jul 20, 22:50 UTCJul 21, 00:55 UTC2h 5m
2026-07-20 SKW4027 AUS → IND Jul 20, 19:40 UTCJul 20, 21:55 UTC2h 15m
2026-07-20 SKW3960 BNA → AUS Jul 20, 16:50 UTCJul 20, 18:40 UTC1h 50m
2026-07-20 SKW3960 AUS → BNA Jul 20, 13:40 UTCJul 20, 15:35 UTC1h 55m
2026-07-20 SKW3945 BNA → AUS Jul 20, 01:00 UTCJul 20, 02:45 UTC1h 45m
2026-07-19 SKW3945 AUS → BNA Jul 19, 20:55 UTCJul 19, 22:45 UTC1h 50m
2026-07-19 SKW3955 ATL → MGM Jul 19, 16:55 UTCJul 19, 19:20 UTC2h 25m
2026-07-19 SKW3874 OMA → SLC Jul 19, 13:50 UTCJul 19, 15:55 UTC2h 5m
2026-07-19 SKW3874 OMA → SLC Jul 19, 13:23 UTCJul 19, 15:46 UTC2h 23m
2026-07-18 SKW3706 - Jul 18, 23:55 UTCJul 19, 00:45 UTC50m
2026-07-18 SKW3706 SLC → OMA Jul 18, 23:43 UTCJul 19, 01:50 UTC2h 7m
2026-07-18 SKW3908 ATL → CRW Jul 18, 19:55 UTCJul 18, 22:20 UTC2h 25m
2026-07-18 SKW3908 ATL → CRW Jul 18, 16:00 UTCJul 18, 18:30 UTC2h 30m
2026-07-18 SKW3856 - Jul 18, 04:50 UTCJul 18, 06:20 UTC1h 30m
2026-07-18 SKW3856 - Jul 18, 02:25 UTCJul 18, 03:50 UTC1h 26m
2026-07-17 SKW3804 - Jul 17, 23:55 UTCJul 18, 01:05 UTC1h 10m
2026-07-17 SKW3804 - Jul 17, 20:29 UTCJul 17, 21:30 UTC1h 0m
2026-07-17 SKW3681 BUR → SLC Jul 17, 16:59 UTCJul 17, 18:25 UTC1h 25m
2026-07-17 SKW3681 BUR → SLC Jul 17, 17:09 UTCJul 17, 18:16 UTC1h 7m
2026-07-17 SKW3681 SLC → BUR Jul 17, 14:35 UTCJul 17, 16:10 UTC1h 35m
2026-07-17 SKW3937 - Jul 17, 05:30 UTCJul 17, 07:00 UTC1h 30m
2026-07-17 SKW3937 SLC → SJC Jul 17, 03:20 UTCJul 17, 04:49 UTC1h 30m
2026-07-17 SKW3694 - Jul 17, 01:15 UTCJul 17, 02:30 UTC1h 15m

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?
Yes. Mode-S A33743 is currently airborne.
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, SKW4017, SKW3972.