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sensors Mode-S transponder

A8359C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N628SY · operated by SKYWEST AIRLINES INC

Hex
A8359C
Octal
52032634
Decimal
11,023,772
Country
US
Tail
N628SY
Type
E75L
Transponder active on ground
Flights observed
576
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A8359C.

Country allocation

The ICAO 24-bit address A8359C 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
SKW5769 - 13 2026-07-12
SKW5403 - 13 2026-07-08
SKW5254 - 12 2026-07-09
SKW4669 - 12 2026-07-08
SKW5774 - 11 2026-07-12
SKW5524 - 10 2026-07-08
SKW5770 - 9 2026-07-09
SKW5779 - 8 2026-07-10
SKW5776 - 8 2026-07-10
SKW5529 - 8 2026-07-12
SKW5771 - 7 2026-07-10
SKW5766 - 7 2026-07-10
SKW5520 - 7 2026-07-12
SKW5444 SkyWest Airlines 7 2026-07-04
SKW5956 - 6 2026-07-07
SKW5814 - 6 2026-07-07
SKW5778 - 6 2026-07-10
SKW5773 - 6 2026-07-09
SKW5713 - 6 2026-07-05
SKW5493 - 6 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW5369 - Jul 14, 16:10 UTCJul 14, 17:40 UTC1h 30m
2026-07-14 SKW5602 - Jul 14, 13:40 UTCJul 14, 14:15 UTC35m
2026-07-14 SKW5602 GUC → DEN Jul 14, 13:47 UTCJul 14, 14:10 UTC23m
2026-07-14 SKW776V - Jul 14, 01:55 UTCJul 14, 02:20 UTC25m
2026-07-13 SKW5393 HSV → DEN Jul 13, 21:10 UTCJul 13, 23:25 UTC2h 15m
2026-07-13 SKW5514 - Jul 13, 16:45 UTCJul 13, 19:05 UTC2h 20m
2026-07-13 SKW5411 - Jul 13, 12:50 UTCJul 13, 14:30 UTC1h 40m
2026-07-13 SKW5411 PSP → DEN Jul 13, 12:46 UTCJul 13, 14:27 UTC1h 41m
2026-07-13 SKW4787 - Jul 13, 01:40 UTCJul 13, 03:10 UTC1h 30m
2026-07-13 SKW4787 DEN → PSP Jul 13, 01:34 UTCJul 13, 03:22 UTC1h 48m
2026-07-12 SKW5774 - Jul 12, 21:20 UTCJul 12, 21:45 UTC25m
2026-07-12 SKW5774 ASE → DEN Jul 12, 21:08 UTCJul 12, 21:46 UTC38m
2026-07-12 SKW5769 - Jul 12, 19:50 UTCJul 12, 20:05 UTC15m
2026-07-12 SKW5769 DEN → ASE Jul 12, 19:19 UTCJul 12, 20:15 UTC56m
2026-07-12 SKW5520 CLD → DEN Jul 12, 15:55 UTCJul 12, 18:01 UTC2h 5m
2026-07-12 SKW5529 DEN → CLD Jul 12, 01:45 UTCJul 12, 04:40 UTC2h 55m
2026-07-12 SKW5529 DEN → CLD Jul 12, 01:44 UTCJul 12, 04:34 UTC2h 50m
2026-07-11 SKW5914 - Jul 11, 22:15 UTCJul 11, 23:40 UTC1h 25m
2026-07-11 SKW5311 - Jul 11, 20:00 UTCJul 11, 21:10 UTC1h 10m
2026-07-11 SKW5787 - Jul 11, 16:35 UTCJul 11, 18:25 UTC1h 50m
2026-07-11 SKW5329 - Jul 11, 04:50 UTCJul 11, 05:25 UTC35m
2026-07-11 SKW5940 - Jul 11, 01:55 UTCJul 11, 03:25 UTC1h 30m
2026-07-11 SKW5940 ASE → LAX Jul 11, 01:34 UTCJul 11, 03:22 UTC1h 48m
2026-07-11 SKW5775 - Jul 11, 00:15 UTCJul 11, 00:30 UTC15m
2026-07-10 SKW5776 - Jul 10, 22:30 UTCJul 10, 22:55 UTC25m
2026-07-10 SKW5776 ASE → DEN Jul 10, 21:41 UTCJul 10, 22:48 UTC1h 7m
2026-07-10 SKW5771 - Jul 10, 20:05 UTCJul 10, 20:25 UTC20m
2026-07-10 SKW5772 - Jul 10, 18:10 UTCJul 10, 18:35 UTC25m
2026-07-10 SKW5782 - Jul 10, 16:20 UTCJul 10, 16:50 UTC30m
2026-07-10 SKW5766 - Jul 10, 13:50 UTCJul 10, 14:15 UTC25m
2026-07-10 SKW5766 ASE → DEN Jul 10, 13:58 UTCJul 10, 14:06 UTC8m
2026-07-10 SKW5779 - Jul 10, 02:10 UTCJul 10, 02:30 UTC20m
2026-07-10 SKW5779 DEN → ASE Jul 10, 01:54 UTCJul 10, 02:55 UTC1h 1m
2026-07-10 SKW5778 - Jul 10, 00:45 UTCJul 10, 01:10 UTC25m
2026-07-10 SKW5778 ASE → DEN Jul 10, 00:03 UTCJul 10, 01:07 UTC1h 4m
2026-07-09 SKW5773 - Jul 9, 21:55 UTCJul 9, 22:10 UTC15m
2026-07-09 SKW5774 - Jul 9, 20:40 UTCJul 9, 21:00 UTC20m
2026-07-09 SKW5769 - Jul 9, 17:50 UTCJul 9, 18:00 UTC10m
2026-07-09 SKW5769 DEN → ASE Jul 9, 17:54 UTCJul 9, 18:15 UTC21m
2026-07-09 SKW5770 - Jul 9, 15:55 UTCJul 9, 16:15 UTC20m
2026-07-09 SKW5254 - Jul 9, 01:45 UTCJul 9, 04:25 UTC2h 40m
2026-07-08 SKW5524 - Jul 8, 22:10 UTCJul 8, 23:50 UTC1h 40m
2026-07-08 SKW5403 - Jul 8, 20:00 UTCJul 8, 21:10 UTC1h 10m
2026-07-08 SKW5403 ORD → GSP Jul 8, 19:26 UTCJul 8, 21:17 UTC1h 51m
2026-07-08 SKW4669 - Jul 8, 15:25 UTCJul 8, 17:30 UTC2h 5m
2026-07-08 SKW4669 ASE → ORD Jul 8, 15:25 UTCJul 8, 17:22 UTC1h 57m
2026-07-08 SKW5254 - Jul 8, 01:15 UTCJul 8, 03:40 UTC2h 25m
2026-07-08 SKW5254 ORD → ASE Jul 8, 01:24 UTCJul 8, 03:53 UTC2h 29m
2026-07-07 SKW5956 - Jul 7, 18:55 UTCJul 7, 21:00 UTC2h 5m
2026-07-07 SKW5956 ASE → ORD Jul 7, 18:55 UTCJul 7, 20:51 UTC1h 56m

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 N628SY page for operator, model, and routing details .

Mode-S A8359C frequently asked

What is Mode-S code A8359C?
A8359C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N628SY.
Where is Mode-S A8359C registered?
Mode-S code A8359C 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 A8359C broadcasting right now?
Mode-S A8359C is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8359C, octal 52032634, decimal 11,023,772.
What flights does A8359C operate?
Mode-S A8359C has broadcast 20 distinct callsigns, including SKW5769, SKW5403, SKW5254, SKW4669, SKW5774.