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sensors Mode-S transponder

A0DAB2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N154SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A0DAB2
Octal
50155262
Decimal
10,541,746
Country
US
Tail
N154SY
Type
E75L
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
643
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A0DAB2.

Country allocation

The ICAO 24-bit address A0DAB2 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
SKW5531 - 8 2026-07-17
SKW5324 - 8 2026-07-17
SKW4746 - 8 2026-06-23
SKW5789 - 7 2026-07-18
SKW5440 - 7 2026-07-10
SKW5886 SkyWest Airlines 6 2026-06-10
SKW5596 - 6 2026-07-16
SKW5540 - 6 2026-07-16
SKW5359 - 6 2026-07-20
SKW5351 - 6 2026-07-10
SKW5242 - 6 2026-07-16
SKW5898 SkyWest Airlines 5 2026-06-10
SKW5788 SkyWest Airlines 5 2026-07-18
SKW5646 SkyWest Airlines 5 2026-05-14
SKW5397 - 5 2026-07-20
SKW5316 SkyWest Airlines 5 2026-05-29
SKW4668 SkyWest Airlines 5 2026-06-10
SKW449T - 5 2026-07-10
SKW6027 SkyWest Airlines 4 2026-06-15
SKW5994 SkyWest Airlines 4 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4629 BOI → SFO Jul 26, 20:05 UTCJul 26, 21:30 UTC1h 25m
2026-07-26 SKW5536 SFO → TUS Jul 26, 16:05 UTCJul 26, 18:20 UTC2h 15m
2026-07-25 SKW4802 ONT → SFO Jul 25, 19:45 UTCJul 25, 21:55 UTC2h 10m
2026-07-25 SKW6041 BOI → DEN Jul 25, 16:45 UTCJul 25, 18:20 UTC1h 35m
2026-07-25 SKW5644 SFO → BOI Jul 25, 02:20 UTCJul 25, 03:25 UTC1h 5m
2026-07-24 SKW5936 DEN → EGE Jul 24, 23:00 UTCJul 25, 01:20 UTC2h 20m
2026-07-24 SKW5936 DEN → EGE Jul 24, 22:55 UTCJul 25, 01:13 UTC2h 18m
2026-07-24 SKW5577 ORD → LGA Jul 24, 19:50 UTCJul 24, 21:20 UTC1h 30m
2026-07-24 SKW5970 SLC → SFO Jul 24, 16:55 UTCJul 24, 18:45 UTC1h 50m
2026-07-24 SKW5753 SAT → ORD Jul 24, 04:45 UTCJul 24, 06:10 UTC1h 25m
2026-07-24 SKW5753 SAT → ORD Jul 24, 04:43 UTCJul 24, 05:59 UTC1h 16m
2026-07-24 SKW5305 CMH → IAH Jul 24, 02:50 UTCJul 24, 03:35 UTC45m
2026-07-24 SKW5305 CMH → IAH Jul 24, 02:31 UTCJul 24, 03:29 UTC58m
2026-07-24 SKW5480 GRR → ORD Jul 24, 00:35 UTCJul 24, 01:05 UTC30m
2026-07-24 SKW5480 GRR → ORD Jul 24, 00:23 UTCJul 24, 01:14 UTC51m
2026-07-23 SKW5578 YYZ → ORD Jul 23, 21:40 UTCJul 23, 23:25 UTC1h 45m
2026-07-23 SKW463C DEN → PSC Jul 23, 18:45 UTCJul 23, 20:35 UTC1h 50m
2026-07-23 SKW5602 - Jul 23, 17:25 UTCJul 23, 17:55 UTC30m
2026-07-23 SKW5602 GUC → DEN Jul 23, 17:23 UTCJul 23, 17:46 UTC23m
2026-07-23 SKW425X - Jul 23, 15:30 UTCJul 23, 15:55 UTC25m
2026-07-22 SKW5198 IAH → MBS Jul 22, 18:25 UTCJul 23, 03:30 UTC9h 5m
2026-07-20 SKW5359 - Jul 20, 23:40 UTCJul 21, 01:15 UTC1h 35m
2026-07-20 SKW5580 ORD → COS Jul 20, 20:20 UTCJul 20, 22:05 UTC1h 45m
2026-07-20 SKW5580 ORD → COS Jul 20, 20:16 UTCJul 20, 21:59 UTC1h 43m
2026-07-20 SKW5397 - Jul 20, 17:35 UTCJul 20, 19:25 UTC1h 50m
2026-07-20 SKW5397 IAH → STL Jul 20, 17:22 UTCJul 20, 19:15 UTC1h 53m
2026-07-20 SKW5876 - Jul 20, 13:30 UTCJul 20, 15:30 UTC2h 0m
2026-07-19 SKW5875 - Jul 19, 22:10 UTCJul 20, 00:00 UTC1h 50m
2026-07-19 SKW5875 IAH → OAX Jul 19, 22:09 UTCJul 20, 00:12 UTC2h 3m
2026-07-19 SKW5637 ORD → MDT Jul 19, 18:55 UTCJul 19, 20:05 UTC1h 10m
2026-07-19 SKW5315 ASE → ORD Jul 19, 16:25 UTCJul 19, 17:45 UTC1h 20m
2026-07-18 SKW5788 ORD → LGA Jul 18, 21:45 UTCJul 18, 22:05 UTC20m
2026-07-18 SKW5789 DEN → HDN Jul 18, 19:51 UTCJul 18, 20:18 UTC27m
2026-07-18 SKW5789 - Jul 18, 19:50 UTCJul 18, 20:05 UTC15m
2026-07-18 SKW5730 DEN → DEN Jul 18, 14:25 UTCJul 18, 17:50 UTC3h 25m
2026-07-18 SKW4751 OKC → DEN Jul 18, 11:25 UTCJul 18, 12:45 UTC1h 20m
2026-07-18 SKW5281 - Jul 18, 02:50 UTCJul 18, 03:55 UTC1h 5m
2026-07-18 SKW5281 IAH → OKC Jul 18, 02:51 UTCJul 18, 03:50 UTC59m
2026-07-18 SKW5658 - Jul 18, 00:29 UTCJul 18, 01:05 UTC35m
2026-07-18 SKW5658 SAT → IAH Jul 18, 00:36 UTCJul 18, 01:02 UTC26m
2026-07-17 SKW5379 - Jul 17, 21:50 UTCJul 17, 22:29 UTC40m
2026-07-17 SKW5531 - Jul 17, 19:00 UTCJul 17, 20:04 UTC1h 5m
2026-07-17 SKW5531 OKC → IAH Jul 17, 19:13 UTCJul 17, 20:04 UTC51m
2026-07-17 SKW5324 DEN → OKC Jul 17, 16:49 UTCJul 17, 18:10 UTC1h 20m
2026-07-17 SKW5324 DEN → OKC Jul 17, 16:41 UTCJul 17, 18:04 UTC1h 23m
2026-07-17 SKW4640 - Jul 17, 13:10 UTCJul 17, 15:35 UTC2h 25m
2026-07-17 SKW4640 HSV → DEN Jul 17, 13:15 UTCJul 17, 15:35 UTC2h 20m
2026-07-17 SKW5356 FAT → SFO Jul 17, 00:10 UTCJul 17, 02:25 UTC2h 15m
2026-07-16 SKW5540 - Jul 16, 20:00 UTCJul 16, 22:05 UTC2h 5m
2026-07-16 SKW572M OAK → RDD Jul 16, 18:34 UTCJul 16, 19:10 UTC35m

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 N154SY page for operator, model, and routing details .

Mode-S A0DAB2 frequently asked

What is Mode-S code A0DAB2?
A0DAB2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N154SY.
Where is Mode-S A0DAB2 registered?
Mode-S code A0DAB2 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 A0DAB2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0DAB2, octal 50155262, decimal 10,541,746.
What flights does A0DAB2 operate?
Mode-S A0DAB2 has broadcast 20 distinct callsigns, including SKW5531, SKW5324, SKW4746, SKW5789, SKW5440.