Apparatus

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sensors Mode-S transponder

A04424

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N116SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A04424
Octal
50042044
Decimal
10,503,204
Country
US
Tail
N116SY
Type
E75L
Broadcasting now · callsign SKW4762 · 36,000 ft
Flights observed
654
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Current position

A04424 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A04424 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
SKW5775 - 13 2026-07-14
SKW5787 - 12 2026-07-20
SKW5956 SkyWest Airlines 10 2026-07-23
SKW5744 SkyWest Airlines 10 2026-07-26
SKW5408 SkyWest Airlines 10 2026-07-26
SKW5329 - 10 2026-07-20
SKW5814 SkyWest Airlines 9 2026-07-23
SKW5694 SkyWest Airlines 9 2026-07-21
SKW5553 - 9 2026-06-19
SKW5550 SkyWest Airlines 9 2026-07-19
SKW5259 - 9 2026-07-16
SKW6008 SkyWest Airlines 8 2026-07-26
SKW6045 SkyWest Airlines 7 2026-06-19
SKW5914 SkyWest Airlines 7 2026-07-20
SKW5652 SkyWest Airlines 7 2026-07-25
SKW5646 SkyWest Airlines 7 2026-07-22
SKW5529 SkyWest Airlines 7 2026-07-21
SKW5520 SkyWest Airlines 7 2026-07-21
SKW5444 SkyWest Airlines 7 2026-06-01
SKW4669 SkyWest Airlines 7 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6008 CAK → ORD Jul 26, 20:55 UTCJul 26, 22:45 UTC1h 50m
2026-07-26 SKW5980 SUN → SFO Jul 26, 17:25 UTCJul 26, 18:55 UTC1h 30m
2026-07-26 SKW5408 SLC → LAX Jul 26, 14:00 UTCJul 26, 15:30 UTC1h 30m
2026-07-26 SKW5744 LAX → SLC Jul 26, 05:55 UTCJul 26, 07:15 UTC1h 21m
2026-07-26 SKW5744 LAX → SLC Jul 26, 05:55 UTCJul 26, 07:13 UTC1h 18m
2026-07-26 SKW5759 ONT → SFO Jul 26, 04:15 UTCJul 26, 05:00 UTC45m
2026-07-25 SKW5652 SFO → MFR Jul 25, 23:40 UTCJul 26, 00:05 UTC25m
2026-07-25 SKW4655 ACV → SFO Jul 25, 22:00 UTCJul 25, 22:40 UTC40m
2026-07-25 SKW5506 SFO → ASE Jul 25, 17:40 UTCJul 25, 19:50 UTC2h 10m
2026-07-25 SKW5506 SFO → ASE Jul 25, 17:44 UTCJul 25, 20:00 UTC2h 16m
2026-07-25 SKW5701 SYR → ORD Jul 25, 11:10 UTCJul 25, 12:20 UTC1h 10m
2026-07-25 SKW309L DEN → FSD Jul 25, 03:35 UTCJul 25, 04:50 UTC1h 15m
2026-07-25 SKW5582 MLI → ORD Jul 25, 00:00 UTCJul 25, 01:10 UTC1h 10m
2026-07-24 SKW5582 MLI → ORD Jul 24, 23:55 UTCJul 25, 01:00 UTC1h 5m
2026-07-24 SKW4766 CHS → ORD Jul 24, 21:25 UTCJul 24, 23:05 UTC1h 40m
2026-07-24 SKW5874 YUL → ORD Jul 24, 16:05 UTCJul 24, 18:15 UTC2h 10m
2026-07-24 SKW5874 YUL → ORD Jul 24, 15:53 UTCJul 24, 17:46 UTC1h 53m
2026-07-24 SKW4654 TYS → ORD Jul 24, 12:55 UTCJul 24, 14:50 UTC1h 55m
2026-07-24 SKW4654 TYS → ORD Jul 24, 12:39 UTCJul 24, 14:38 UTC1h 59m
2026-07-23 SKW5956 ASE → ORD Jul 23, 21:15 UTCJul 23, 23:40 UTC2h 25m
2026-07-23 SKW5814 RNO → SFO Jul 23, 17:30 UTCJul 23, 19:40 UTC2h 10m
2026-07-23 SKW5300 LCH → IAH Jul 23, 14:10 UTCJul 23, 16:10 UTC2h 0m
2026-07-22 SKW5773 BNA → ORD Jul 22, 22:00 UTCJul 22, 22:30 UTC30m
2026-07-22 SKW5773 BNA → ORD Jul 22, 21:56 UTCJul 22, 23:03 UTC1h 7m
2026-07-22 SKW5774 ASE → DEN Jul 22, 20:30 UTCJul 22, 20:55 UTC25m
2026-07-22 SKW5774 ASE → DEN Jul 22, 20:32 UTCJul 22, 20:53 UTC21m
2026-07-22 SKW5769 - Jul 22, 17:50 UTCJul 22, 18:05 UTC15m
2026-07-22 SKW5642 TUS → ORD Jul 22, 14:50 UTCJul 22, 16:00 UTC1h 10m
2026-07-22 SKW5646 ORD → MSN Jul 22, 03:35 UTCJul 22, 04:35 UTC1h 0m
2026-07-21 SKW5694 GRB → ORD Jul 21, 22:35 UTCJul 22, 00:15 UTC1h 40m
2026-07-21 SKW5694 GRB → ORD Jul 21, 22:32 UTCJul 22, 00:10 UTC1h 38m
2026-07-21 SKW5641 DEN → XNA Jul 21, 20:05 UTCJul 21, 21:30 UTC1h 25m
2026-07-21 SKW5520 OKC → IAH Jul 21, 16:00 UTCJul 21, 17:55 UTC1h 55m
2026-07-21 SKW5529 LAX → RDD Jul 21, 01:55 UTCJul 21, 03:50 UTC1h 55m
2026-07-20 SKW5914 LNK → ORD Jul 20, 22:45 UTCJul 21, 00:10 UTC1h 24m
2026-07-20 SKW5311 ORD → DCA Jul 20, 20:30 UTCJul 20, 21:45 UTC1h 15m
2026-07-20 SKW5787 - Jul 20, 16:20 UTCJul 20, 18:25 UTC2h 5m
2026-07-20 SKW5329 - Jul 20, 05:40 UTCJul 20, 06:10 UTC30m
2026-07-20 SKW5731 SBP → LAX Jul 20, 01:26 UTCJul 20, 01:48 UTC22m
2026-07-20 SKW5731 - Jul 20, 01:10 UTCJul 20, 01:55 UTC45m
2026-07-19 SKW5550 DEN → GUC Jul 19, 23:35 UTCJul 20, 00:05 UTC30m
2026-07-19 SKW6008 - Jul 19, 20:15 UTCJul 19, 21:55 UTC1h 40m
2026-07-19 SKW5980 LAX → SUN Jul 19, 17:27 UTCJul 19, 18:44 UTC1h 17m
2026-07-19 SKW5980 - Jul 19, 17:10 UTCJul 19, 18:20 UTC1h 10m
2026-07-19 SKW5408 SLC → LAX Jul 19, 14:00 UTCJul 19, 15:30 UTC1h 30m
2026-07-19 SKW5408 SLC → LAX Jul 19, 13:58 UTCJul 19, 15:22 UTC1h 24m
2026-07-19 SKW5744 LAX → SLC Jul 19, 03:35 UTCJul 19, 05:05 UTC1h 30m
2026-07-19 SKW5744 LAX → SLC Jul 19, 03:37 UTCJul 19, 05:03 UTC1h 26m
2026-07-19 SKW5759 ONT → SFO Jul 19, 01:55 UTCJul 19, 02:40 UTC45m
2026-07-19 SKW5759 ONT → SFO Jul 19, 01:43 UTCJul 19, 02:30 UTC47m

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 N116SY page for operator, model, and routing details .

Mode-S A04424 frequently asked

What is Mode-S code A04424?
A04424 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N116SY.
Where is Mode-S A04424 registered?
Mode-S code A04424 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 A04424 broadcasting right now?
Yes. Mode-S A04424 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A04424, octal 50042044, decimal 10,503,204.
What flights does A04424 operate?
Mode-S A04424 has broadcast 20 distinct callsigns, including SKW5775, SKW5787, SKW5956, SKW5744, SKW5408.