Apparatus

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sensors Mode-S transponder

A0AF7C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N143SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A0AF7C
Octal
50127574
Decimal
10,530,684
Country
US
Tail
N143SY
Type
E75L
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
434
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S A0AF7C.

Country allocation

The ICAO 24-bit address A0AF7C 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
SKW4762 SkyWest Airlines 7 2026-05-30
SKW5533 - 6 2026-07-14
SKW5967 SkyWest Airlines 5 2026-05-12
SKW5830 SkyWest Airlines 5 2026-05-19
SKW5747 SkyWest Airlines 5 2026-05-12
SKW5637 SkyWest Airlines 5 2026-06-05
SKW5413 - 5 2026-07-15
SKW5315 SkyWest Airlines 5 2026-06-05
SKW5941 SkyWest Airlines 4 2026-06-11
SKW5911 - 4 2026-07-18
SKW5760 SkyWest Airlines 4 2026-05-30
SKW5756 SkyWest Airlines 4 2026-05-19
SKW5618 SkyWest Airlines 4 2026-07-23
SKW5607 SkyWest Airlines 4 2026-06-07
SKW5511 SkyWest Airlines 4 2026-07-23
SKW5476 SkyWest Airlines 4 2026-06-08
SKW5475 SkyWest Airlines 4 2026-07-23
SKW5459 SkyWest Airlines 4 2026-05-19
SKW5407 SkyWest Airlines 4 2026-05-03
SKW5389 SkyWest Airlines 4 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5412 DEN → HSV Jul 26, 20:15 UTCJul 26, 21:00 UTC45m
2026-07-26 SKW5434 FWA → ORD Jul 26, 15:45 UTCJul 26, 18:10 UTC2h 25m
2026-07-26 SKW4672 BOI → SFO Jul 26, 13:00 UTCJul 26, 14:45 UTC1h 45m
2026-07-26 SKW4707 STL → ORD Jul 26, 10:20 UTCJul 26, 11:00 UTC40m
2026-07-26 SKW4707 STL → ORD Jul 26, 10:19 UTCJul 26, 10:47 UTC28m
2026-07-26 SKW5768 SBN → ORD Jul 26, 01:10 UTCJul 26, 01:40 UTC30m
2026-07-25 SKW5929 ORD → OMA Jul 25, 22:25 UTCJul 25, 23:35 UTC1h 10m
2026-07-25 SKW5412 DEN → HSV Jul 25, 20:05 UTCJul 25, 20:50 UTC45m
2026-07-25 SKW5976 SHV → IAH Jul 25, 16:05 UTCJul 25, 17:35 UTC1h 30m
2026-07-25 SKW6021 TUL → DTW Jul 25, 01:15 UTCJul 25, 02:50 UTC1h 35m
2026-07-24 SKW5334 SFO → EUG Jul 24, 21:15 UTCJul 24, 23:00 UTC1h 45m
2026-07-24 SKW5449 ORD → HPN Jul 24, 18:05 UTCJul 24, 19:45 UTC1h 40m
2026-07-24 SKW5504 LAX → ASE Jul 24, 15:00 UTCJul 24, 16:05 UTC1h 5m
2026-07-24 SKW5504 LAX → ASE Jul 24, 14:51 UTCJul 24, 15:50 UTC59m
2026-07-24 SKW6005 SUN → ORD Jul 24, 12:30 UTCJul 24, 13:30 UTC1h 0m
2026-07-24 SKW5934 ORD → FCA Jul 24, 01:40 UTCJul 24, 02:50 UTC1h 10m
2026-07-23 SKW5591 LAX → FAT Jul 23, 22:30 UTCJul 23, 23:40 UTC1h 10m
2026-07-23 SKW5591 LAX → FAT Jul 23, 22:10 UTCJul 23, 23:36 UTC1h 26m
2026-07-23 SKW5511 SGF → DEN Jul 23, 18:35 UTCJul 23, 20:25 UTC1h 50m
2026-07-23 SKW5475 SFO → MFR Jul 23, 14:55 UTCJul 23, 16:50 UTC1h 55m
2026-07-23 SKW5475 SFO → MFR Jul 23, 14:53 UTCJul 23, 16:47 UTC1h 54m
2026-07-23 SKW5618 PDX → SFO Jul 23, 10:30 UTCJul 23, 11:25 UTC55m
2026-07-23 SKW5618 PDX → SFO Jul 23, 10:22 UTCJul 23, 11:12 UTC50m
2026-07-23 SKW5785 ORD → DTW Jul 23, 01:50 UTCJul 23, 02:35 UTC45m
2026-07-22 SKW5435 - Jul 22, 23:25 UTCJul 23, 00:10 UTC45m
2026-07-22 SKW5435 IND → ORD Jul 22, 23:23 UTCJul 22, 23:54 UTC31m
2026-07-22 SKW5985 DEN → BHM Jul 22, 21:55 UTCJul 22, 22:25 UTC30m
2026-07-22 SKW5465 ORD → HPN Jul 22, 17:40 UTCJul 22, 19:40 UTC2h 0m
2026-07-22 SKW5326 ORD → RDU Jul 22, 14:35 UTCJul 22, 16:05 UTC1h 30m
2026-07-22 SKW5618 PDX → SFO Jul 22, 10:22 UTCJul 22, 10:59 UTC37m
2026-07-22 SKW5785 ORD → DTW Jul 22, 02:00 UTCJul 22, 02:50 UTC50m
2026-07-21 SKW5334 SFO → EUG Jul 21, 21:50 UTCJul 22, 00:15 UTC2h 25m
2026-07-21 SKW5449 ORD → HPN Jul 21, 18:35 UTCJul 21, 20:35 UTC2h 0m
2026-07-21 SKW5717 ABE → ORD Jul 21, 15:05 UTCJul 21, 16:45 UTC1h 40m
2026-07-21 SKW5325 SNA → SFO Jul 21, 12:50 UTCJul 21, 14:00 UTC1h 10m
2026-07-20 SKW5243 SFO → GEG Jul 20, 23:45 UTCJul 21, 01:00 UTC1h 15m
2026-07-20 SKW5243 SFO → GEG Jul 20, 23:37 UTCJul 21, 00:53 UTC1h 16m
2026-07-20 SKW6001 SFO → MTY Jul 20, 21:50 UTCJul 20, 22:05 UTC15m
2026-07-20 SKW6001 SFO → MTY Jul 20, 18:15 UTCJul 20, 20:30 UTC2h 15m
2026-07-20 SKW6001 SFO → MTY Jul 20, 18:24 UTCJul 20, 21:31 UTC3h 7m
2026-07-20 SKW5479 SFO → MRY Jul 20, 12:15 UTCJul 20, 15:30 UTC3h 15m
2026-07-20 SKW6036 SFO → SAT Jul 20, 01:50 UTCJul 20, 05:05 UTC3h 15m
2026-07-19 SKW5351 SFO → SNA Jul 19, 23:30 UTCJul 20, 00:30 UTC1h 0m
2026-07-19 SKW5440 SLC → SFO Jul 19, 21:10 UTCJul 19, 22:20 UTC1h 10m
2026-07-19 SKW5440 SLC → SFO Jul 19, 21:03 UTCJul 19, 22:14 UTC1h 11m
2026-07-19 SKW5660 SFO → FAT Jul 19, 18:50 UTCJul 19, 19:00 UTC10m
2026-07-19 SKW5660 SFO → FAT Jul 19, 18:26 UTCJul 19, 19:54 UTC1h 28m
2026-07-19 SKW5904 - Jul 19, 15:20 UTCJul 19, 16:20 UTC1h 0m
2026-07-19 SKW4763 IAH → SLC Jul 19, 12:30 UTCJul 19, 14:10 UTC1h 40m
2026-07-19 SKW449T DEN → SLC Jul 19, 00:05 UTCJul 19, 01:10 UTC1h 5m

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 N143SY page for operator, model, and routing details .

Mode-S A0AF7C frequently asked

What is Mode-S code A0AF7C?
A0AF7C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N143SY.
Where is Mode-S A0AF7C registered?
Mode-S code A0AF7C 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 A0AF7C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0AF7C, octal 50127574, decimal 10,530,684.
What flights does A0AF7C operate?
Mode-S A0AF7C has broadcast 20 distinct callsigns, including SKW4762, SKW5533, SKW5967, SKW5830, SKW5747.