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sensors Mode-S transponder

A1ADAB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N207SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A1ADAB
Octal
50326653
Decimal
10,595,755
Country
US
Tail
N207SY
Type
E75L
No current signal · last broadcast 2h ago
Flights observed
529
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A1ADAB.

Country allocation

The ICAO 24-bit address A1ADAB 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
SKW5904 SkyWest Airlines 7 2026-06-20
SKW5660 - 6 2026-06-20
SKW5440 - 6 2026-06-17
SKW4661 - 6 2026-07-04
SKW5924 - 5 2026-06-21
SKW5351 - 5 2026-06-18
SKW5315 - 5 2026-06-28
SKW4777 - 5 2026-07-13
SKW6001 - 4 2026-07-03
SKW5667 SkyWest Airlines 4 2026-04-24
SKW5637 SkyWest Airlines 4 2026-06-28
SKW5632 - 4 2026-07-12
SKW5596 SkyWest Airlines 4 2026-05-30
SKW5595 SkyWest Airlines 4 2026-06-09
SKW5407 SkyWest Airlines 4 2026-06-06
SKW5358 - 4 2026-07-13
SKW5286 SkyWest Airlines 4 2026-04-27
SKW5244 SkyWest Airlines 4 2026-06-07
SKW5242 SkyWest Airlines 4 2026-05-30
SKW4783 - 4 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW5373 - Jul 14, 13:15 UTCJul 14, 15:40 UTC2h 25m
2026-07-14 SKW4774 DEN → MKE Jul 14, 00:00 UTCJul 14, 02:05 UTC2h 5m
2026-07-13 SKW5788 - Jul 13, 21:45 UTCJul 13, 22:05 UTC20m
2026-07-13 SKW5788 HDN → DEN Jul 13, 21:36 UTCJul 13, 22:04 UTC28m
2026-07-13 SKW5789 DEN → HDN Jul 13, 19:51 UTCJul 13, 20:29 UTC38m
2026-07-13 SKW5789 - Jul 13, 20:05 UTCJul 13, 20:20 UTC15m
2026-07-13 SKW5358 - Jul 13, 16:50 UTCJul 13, 18:05 UTC1h 15m
2026-07-13 SKW5247 - Jul 13, 14:15 UTCJul 13, 15:35 UTC1h 20m
2026-07-13 SKW4777 - Jul 13, 10:55 UTCJul 13, 12:15 UTC1h 20m
2026-07-13 SKW5389 DEN → DSM Jul 13, 03:50 UTCJul 13, 05:10 UTC1h 20m
2026-07-12 SKW5632 - Jul 12, 23:40 UTCJul 13, 01:20 UTC1h 40m
2026-07-12 SKW4783 - Jul 12, 20:30 UTCJul 12, 21:15 UTC45m
2026-07-12 SKW5991 - Jul 12, 17:55 UTCJul 12, 18:30 UTC35m
2026-07-12 SKW5991 FCA → DEN Jul 12, 16:51 UTCJul 12, 18:30 UTC1h 39m
2026-07-12 SKW5476 DEN → FCA Jul 12, 13:59 UTCJul 12, 15:41 UTC1h 42m
2026-07-12 SKW5476 - Jul 12, 13:50 UTCJul 12, 14:35 UTC45m
2026-07-12 SKW4751 OKC → DEN Jul 12, 11:15 UTCJul 12, 12:35 UTC1h 20m
2026-07-11 SKW4766 ORD → OKC Jul 11, 21:25 UTCJul 11, 23:05 UTC1h 40m
2026-07-11 SKW4766 ORD → OKC Jul 11, 21:22 UTCJul 11, 22:58 UTC1h 36m
2026-07-11 SKW5928 - Jul 11, 18:40 UTCJul 11, 19:30 UTC50m
2026-07-11 SKW5586 - Jul 11, 16:15 UTCJul 11, 16:50 UTC35m
2026-07-11 SKW4673 - Jul 11, 12:30 UTCJul 11, 14:30 UTC2h 0m
2026-07-11 SKW4673 ALB → ORD Jul 11, 12:34 UTCJul 11, 14:16 UTC1h 42m
2026-07-10 SKW5451 - Jul 10, 20:05 UTCJul 10, 21:35 UTC1h 30m
2026-07-10 SKW5451 ORD → ALB Jul 10, 20:05 UTCJul 10, 21:34 UTC1h 29m
2026-07-10 SKW5434 - Jul 10, 15:50 UTCJul 10, 18:10 UTC2h 20m
2026-07-10 SKW4672 - Jul 10, 12:55 UTCJul 10, 14:50 UTC1h 55m
2026-07-10 SKW4707 - Jul 10, 10:20 UTCJul 10, 10:45 UTC25m
2026-07-10 SKW5214 - Jul 10, 03:15 UTCJul 10, 05:10 UTC1h 55m
2026-07-09 SKW4783 DEN → DEN Jul 9, 20:25 UTCJul 10, 02:10 UTC5h 45m
2026-07-09 SKW5490 OKC → DEN Jul 9, 16:40 UTCJul 9, 17:55 UTC1h 15m
2026-07-09 SKW6029 DEN → OKC Jul 9, 14:20 UTCJul 9, 15:35 UTC1h 15m
2026-07-09 SKW4777 - Jul 9, 11:05 UTCJul 9, 12:35 UTC1h 30m
2026-07-09 SKW5389 DEN → DSM Jul 9, 04:55 UTCJul 9, 06:30 UTC1h 35m
2026-07-09 SKW5273 - Jul 9, 02:20 UTCJul 9, 02:40 UTC20m
2026-07-09 SKW5273 - Jul 9, 00:15 UTCJul 9, 02:40 UTC2h 25m
2026-07-09 SKW5273 CID → DEN Jul 9, 00:09 UTCJul 9, 02:03 UTC1h 54m
2026-07-08 SKW5677 DEN → CID Jul 8, 20:10 UTCJul 8, 21:40 UTC1h 30m
2026-07-08 SKW5834 - Jul 8, 16:55 UTCJul 8, 17:55 UTC1h 0m
2026-07-08 SKW5487 DEN → ABQ Jul 8, 14:25 UTCJul 8, 15:20 UTC55m
2026-07-08 SKW4777 - Jul 8, 11:20 UTCJul 8, 12:45 UTC1h 25m
2026-07-08 SKW4777 DSM → DEN Jul 8, 11:11 UTCJul 8, 12:46 UTC1h 35m
2026-07-08 SKW5389 DEN → DSM Jul 8, 03:30 UTCJul 8, 04:50 UTC1h 20m
2026-07-08 SKW5632 SNA → SFO Jul 8, 00:05 UTCJul 8, 01:45 UTC1h 40m
2026-07-07 SKW5632 SNA → SFO Jul 7, 21:10 UTCJul 8, 01:50 UTC4h 40m
2026-07-07 SKW5358 - Jul 7, 16:50 UTCJul 7, 18:05 UTC1h 15m
2026-07-07 SKW5358 MCI → DEN Jul 7, 16:47 UTCJul 7, 18:02 UTC1h 15m
2026-07-07 SKW5247 DEN → MCI Jul 7, 14:20 UTCJul 7, 15:31 UTC1h 11m
2026-07-07 SKW4751 OKC → DEN Jul 7, 11:15 UTCJul 7, 12:35 UTC1h 20m
2026-07-07 SKW4727 DEN → OKC Jul 7, 03:20 UTCJul 7, 04:30 UTC1h 10m

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 N207SY page for operator, model, and routing details .

Mode-S A1ADAB frequently asked

What is Mode-S code A1ADAB?
A1ADAB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N207SY.
Where is Mode-S A1ADAB registered?
Mode-S code A1ADAB 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 A1ADAB broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1ADAB, octal 50326653, decimal 10,595,755.
What flights does A1ADAB operate?
Mode-S A1ADAB has broadcast 20 distinct callsigns, including SKW5904, SKW5660, SKW5440, SKW4661, SKW5924.