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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
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
668
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

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
SKW5779 - 10 2026-07-16
SKW5773 SkyWest Airlines 10 2026-07-26
SKW5524 - 10 2026-07-08
SKW5343 SkyWest Airlines 10 2026-07-26
SKW5770 - 9 2026-07-09
SKW5776 - 8 2026-07-10
SKW5529 - 8 2026-07-12
SKW4767 SkyWest Airlines 8 2026-07-26
SKW5778 - 7 2026-07-16
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5773 BNA → ORD Jul 26, 21:30 UTCJul 26, 23:00 UTC1h 30m
2026-07-26 SKW4767 HPN → ORD Jul 26, 19:30 UTCJul 26, 20:00 UTC30m
2026-07-26 SKW4767 HPN → ORD Jul 26, 19:37 UTCJul 26, 19:57 UTC20m
2026-07-26 SKW5343 SGF → IAH Jul 26, 17:40 UTCJul 26, 18:00 UTC20m
2026-07-26 SKW4687 EUG → SFO Jul 26, 14:50 UTCJul 26, 15:15 UTC25m
2026-07-25 SKW5764 DAY → DEN Jul 25, 23:40 UTCJul 26, 01:05 UTC1h 25m
2026-07-25 SKW6008 CAK → ORD Jul 25, 20:25 UTCJul 25, 22:10 UTC1h 45m
2026-07-25 SKW5980 SUN → SFO Jul 25, 17:25 UTCJul 25, 18:50 UTC1h 25m
2026-07-25 SKW5980 SUN → SFO Jul 25, 17:27 UTCJul 25, 19:03 UTC1h 36m
2026-07-25 SKW5408 SLC → LAX Jul 25, 14:09 UTCJul 25, 15:37 UTC1h 28m
2026-07-25 SKW5408 SLC → LAX Jul 25, 14:05 UTCJul 25, 15:50 UTC1h 45m
2026-07-25 SKW5744 LAX → SLC Jul 25, 04:30 UTCJul 25, 05:50 UTC1h 20m
2026-07-25 SKW5744 LAX → SLC Jul 25, 04:26 UTCJul 25, 05:48 UTC1h 22m
2026-07-25 SKW5759 ONT → SFO Jul 25, 02:40 UTCJul 25, 03:20 UTC40m
2026-07-25 SKW5652 SFO → MFR Jul 25, 01:05 UTCJul 25, 01:35 UTC30m
2026-07-24 SKW4655 ACV → SFO Jul 24, 23:05 UTCJul 25, 00:00 UTC55m
2026-07-24 SKW4655 ACV → SFO Jul 24, 22:55 UTCJul 24, 23:55 UTC1h 0m
2026-07-24 SKW5506 SFO → ASE Jul 24, 17:55 UTCJul 24, 20:00 UTC2h 5m
2026-07-24 SKW4687 EUG → SFO Jul 24, 14:50 UTCJul 24, 15:15 UTC25m
2026-07-24 SKW4687 EUG → SFO Jul 24, 14:58 UTCJul 24, 15:14 UTC16m
2026-07-24 SKW5781 DEN → ASE Jul 24, 03:20 UTCJul 24, 03:35 UTC15m
2026-07-24 SKW5781 DEN → ASE Jul 24, 02:58 UTCJul 24, 03:44 UTC46m
2026-07-24 SKW6011 ASE → DEN Jul 24, 01:00 UTCJul 24, 01:25 UTC25m
2026-07-24 SKW6011 ASE → DEN Jul 24, 00:31 UTCJul 24, 01:20 UTC49m
2026-07-23 SKW5697 SFO → BUR Jul 23, 22:55 UTCJul 23, 23:15 UTC20m
2026-07-23 SKW5607 TVC → DEN Jul 23, 21:05 UTCJul 23, 21:30 UTC25m
2026-07-23 SKW4700 FAT → SFO Jul 23, 17:35 UTCJul 23, 19:05 UTC1h 30m
2026-07-23 SKW4756 SFO → SNA Jul 23, 14:45 UTCJul 23, 16:10 UTC1h 25m
2026-07-23 SKW4756 SFO → SNA Jul 23, 14:42 UTCJul 23, 16:03 UTC1h 21m
2026-07-23 SKW5441 SFO → SBA Jul 23, 03:25 UTCJul 23, 04:35 UTC1h 10m
2026-07-23 SKW5731 SMF → SFO Jul 23, 01:20 UTCJul 23, 01:55 UTC35m
2026-07-22 SKW5550 DEN → GUC Jul 22, 23:30 UTCJul 23, 00:00 UTC30m
2026-07-22 SKW6008 CAK → ORD Jul 22, 20:15 UTCJul 22, 21:55 UTC1h 40m
2026-07-22 SKW6008 CAK → ORD Jul 22, 20:10 UTCJul 22, 21:52 UTC1h 42m
2026-07-22 SKW5980 SUN → SFO Jul 22, 17:30 UTCJul 22, 19:00 UTC1h 30m
2026-07-22 SKW5980 SUN → SFO Jul 22, 17:27 UTCJul 22, 19:12 UTC1h 45m
2026-07-22 SKW5408 SLC → LAX Jul 22, 14:45 UTCJul 22, 16:15 UTC1h 30m
2026-07-22 SKW5408 SLC → LAX Jul 22, 14:39 UTCJul 22, 16:12 UTC1h 33m
2026-07-22 SKW5744 LAX → SLC Jul 22, 03:35 UTCJul 22, 05:20 UTC1h 45m
2026-07-22 SKW5759 ONT → SFO Jul 22, 01:35 UTCJul 22, 02:25 UTC50m
2026-07-21 SKW4806 - Jul 21, 22:00 UTCJul 21, 23:45 UTC1h 45m
2026-07-21 SKW4806 DEN → FAT Jul 21, 21:53 UTCJul 21, 23:51 UTC1h 58m
2026-07-21 SKW4767 HPN → ORD Jul 21, 19:15 UTCJul 21, 19:40 UTC25m
2026-07-21 SKW5343 DEN → GUC Jul 21, 17:39 UTCJul 21, 18:00 UTC21m
2026-07-21 SKW5343 - Jul 21, 17:30 UTCJul 21, 17:55 UTC25m
2026-07-21 SKW5642 TUS → ORD Jul 21, 15:05 UTCJul 21, 16:15 UTC1h 10m
2026-07-21 SKW5646 ORD → MSN Jul 21, 03:40 UTCJul 21, 05:00 UTC1h 20m
2026-07-21 SKW5736 SLC → SFO Jul 21, 00:28 UTCJul 21, 01:31 UTC1h 3m
2026-07-20 SKW5736 SLC → SFO Jul 20, 21:30 UTCJul 21, 01:40 UTC4h 9m
2026-07-20 SKW4767 - Jul 20, 19:20 UTCJul 20, 19:50 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 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?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
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.