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sensors Mode-S transponder

A75DE4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N574GJ · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A75DE4
Octal
51656744
Decimal
10,968,548
Country
US
Tail
N574GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
498
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S A75DE4.

Country allocation

The ICAO 24-bit address A75DE4 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
SKW5528 SkyWest Airlines 8 2026-07-25
SKW5346 SkyWest Airlines 7 2026-07-26
SKW5504 SkyWest Airlines 6 2026-04-28
SKW5274 SkyWest Airlines 6 2026-06-08
SKW5076 SkyWest Airlines 6 2026-04-28
SKW5055 SkyWest Airlines 6 2026-05-13
SKW4704 - 6 2026-07-12
SKW6007 SkyWest Airlines 5 2026-05-29
SKW5827 SkyWest Airlines 5 2026-07-07
SKW5824 - 5 2026-07-07
SKW5563 SkyWest Airlines 5 2026-05-29
SKW5530 SkyWest Airlines 5 2026-05-04
SKW5302 - 5 2026-07-05
SKW5071 SkyWest Airlines 5 2026-05-13
SKW4778 - 5 2026-07-13
SKW4725 SkyWest Airlines 5 2026-07-23
SKW4709 - 5 2026-07-12
SKW4663 - 5 2026-07-06
SKW5890 SkyWest Airlines 4 2026-06-08
SKW5866 - 4 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW394Y DEN → MAF Jul 26, 20:00 UTCJul 26, 21:10 UTC1h 10m
2026-07-26 SKW5346 DEN → STL Jul 26, 13:25 UTCJul 26, 14:25 UTC1h 0m
2026-07-26 SKW779Y DEN → SUX Jul 26, 00:00 UTCJul 26, 01:10 UTC1h 10m
2026-07-25 SKW5528 LAX → ACV Jul 25, 21:46 UTCJul 25, 22:59 UTC1h 13m
2026-07-25 SKW5528 LAX → ACV Jul 25, 18:30 UTCJul 25, 23:05 UTC4h 35m
2026-07-25 SKW4764 HPN → ORD Jul 25, 16:20 UTCJul 25, 17:00 UTC40m
2026-07-25 SKW4790 DEN → BIL Jul 25, 14:15 UTCJul 25, 14:50 UTC35m
2026-07-25 SKW4790 DEN → BIL Jul 25, 14:19 UTCJul 25, 14:53 UTC34m
2026-07-25 SKW4738 SLC → ORD Jul 25, 12:20 UTCJul 25, 13:15 UTC55m
2026-07-25 SKW4738 SLC → ORD Jul 25, 12:15 UTCJul 25, 13:10 UTC55m
2026-07-25 SKW700V DEN → DVL Jul 25, 03:45 UTCJul 25, 04:35 UTC50m
2026-07-24 SKW5906 BNA → ORD Jul 24, 21:40 UTCJul 25, 01:50 UTC4h 10m
2026-07-24 SKW5229 SFO → TUS Jul 24, 19:45 UTCJul 24, 20:45 UTC1h 0m
2026-07-24 SKW5229 SFO → TUS Jul 24, 19:12 UTCJul 24, 20:42 UTC1h 30m
2026-07-24 SKW5235 IAH → GDL Jul 24, 16:50 UTCJul 24, 18:05 UTC1h 15m
2026-07-23 SKW734P DEN → XWA Jul 23, 21:10 UTCJul 24, 14:30 UTC17h 20m
2026-07-23 SKW4725 DEN → BFL Jul 23, 17:05 UTCJul 23, 17:30 UTC25m
2026-07-23 SKMX574 DEN → COS Jul 23, 05:40 UTCJul 23, 06:05 UTC25m
2026-07-22 SKW5357 - Jul 22, 20:00 UTCJul 23, 03:25 UTC7h 25m
2026-07-22 SKW5825 LNK → DEN Jul 22, 16:50 UTCJul 22, 18:00 UTC1h 10m
2026-07-22 SKW5215 LGA → ORD Jul 22, 14:35 UTCJul 22, 15:50 UTC1h 15m
2026-07-21 SKW5648 MKE → ORD Jul 21, 22:55 UTCJul 21, 23:30 UTC35m
2026-07-21 SKW5345 ORD → CAK Jul 21, 21:15 UTCJul 21, 21:30 UTC15m
2026-07-21 SKW5345 ORD → CAK Jul 21, 21:14 UTCJul 21, 21:30 UTC16m
2026-07-21 SKW5470 ORD → CHA Jul 21, 16:40 UTCJul 21, 18:05 UTC1h 25m
2026-07-21 SKW5407 ONT → SFO Jul 21, 14:20 UTCJul 21, 15:35 UTC1h 15m
2026-07-21 SKW4651 MFR → SFO Jul 21, 11:00 UTCJul 21, 12:30 UTC1h 30m
2026-07-20 SKW5663 SFO → FAT Jul 20, 23:55 UTCJul 21, 01:05 UTC1h 10m
2026-07-20 SKW4726 ORD → HPN Jul 20, 20:25 UTCJul 20, 20:50 UTC25m
2026-07-20 SKW4726 ORD → HPN Jul 20, 20:30 UTCJul 20, 20:47 UTC17m
2026-07-20 SKW5933 PWM → ORD Jul 20, 19:10 UTCJul 20, 19:35 UTC25m
2026-07-20 SKW5575 - Jul 20, 16:20 UTCJul 20, 17:00 UTC40m
2026-07-20 SLW5341 - Jul 20, 14:35 UTCJul 20, 15:10 UTC35m
2026-07-20 SKW4646 CAK → ORD Jul 20, 11:10 UTCJul 20, 12:05 UTC55m
2026-07-20 SKW4646 CAK → ORD Jul 20, 11:14 UTCJul 20, 12:05 UTC51m
2026-07-20 SKW5982 SBA → SFO Jul 20, 02:50 UTCJul 20, 03:40 UTC50m
2026-07-19 SKW5516 SAV → ORD Jul 19, 22:45 UTCJul 19, 23:50 UTC1h 5m
2026-07-19 SKW5250 ORD → SAV Jul 19, 19:25 UTCJul 19, 19:55 UTC30m
2026-07-19 SKW5470 ORD → CHA Jul 19, 16:25 UTCJul 19, 17:45 UTC1h 20m
2026-07-19 SKW5407 - Jul 19, 14:00 UTCJul 19, 15:15 UTC1h 15m
2026-07-19 SKW5840 PHX → IAH Jul 19, 11:25 UTCJul 19, 12:20 UTC55m
2026-07-18 SKW5640 ORD → TVC Jul 18, 23:05 UTCJul 18, 23:35 UTC30m
2026-07-18 SKW5470 ORD → CHA Jul 18, 17:55 UTCJul 18, 19:20 UTC1h 25m
2026-07-18 SKW5407 - Jul 18, 15:40 UTCJul 18, 16:50 UTC1h 10m
2026-07-18 SKW5710 - Jul 18, 11:55 UTCJul 18, 12:25 UTC30m
2026-07-18 SKW5710 FWA → ORD Jul 18, 11:52 UTCJul 18, 12:25 UTC33m
2026-07-18 SKW701H ORD → MCW Jul 18, 00:52 UTCJul 18, 01:27 UTC35m
2026-07-18 SKW701H ORD → MCW Jul 18, 01:00 UTCJul 18, 01:25 UTC25m
2026-07-17 SKW5686 FNT → ORD Jul 17, 22:55 UTCJul 17, 23:30 UTC35m
2026-07-17 SKW6033 - Jul 17, 18:05 UTCJul 17, 18:34 UTC30m

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 N574GJ page for operator, model, and routing details .

Mode-S A75DE4 frequently asked

What is Mode-S code A75DE4?
A75DE4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N574GJ.
Where is Mode-S A75DE4 registered?
Mode-S code A75DE4 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 A75DE4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A75DE4, octal 51656744, decimal 10,968,548.
What flights does A75DE4 operate?
Mode-S A75DE4 has broadcast 20 distinct callsigns, including SKW5528, SKW5346, SKW5504, SKW5274, SKW5076.