Apparatus

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sensors Mode-S transponder

A1BEE0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N211SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A1BEE0
Octal
50337340
Decimal
10,600,160
Country
US
Tail
N211SY
Type
E75L
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
646
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A1BEE0.

Country allocation

The ICAO 24-bit address A1BEE0 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
SKW5440 - 8 2026-06-20
SKW5351 - 8 2026-06-20
SKW4680 SkyWest Airlines 8 2026-07-19
SKW6001 - 7 2026-07-14
SKW5533 - 7 2026-07-06
SKW5325 - 7 2026-07-12
SKW5243 - 7 2026-07-14
SKW5672 - 6 2026-07-13
SKW5475 SkyWest Airlines 6 2026-07-26
SKW4805 - 6 2026-06-24
SKW4737 - 6 2026-07-16
SKW5904 SkyWest Airlines 5 2026-06-07
SKW5780 SkyWest Airlines 5 2026-05-25
SKW5567 SkyWest Airlines 5 2026-06-25
SKW5376 SkyWest Airlines 5 2026-07-21
SKW5339 - 5 2026-07-16
SKW5296 - 5 2026-06-17
SKW4749 - 5 2026-06-30
SKW4724 - 5 2026-07-16
SKW4657 SkyWest Airlines 5 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5638 SFO → SMF Jul 26, 21:25 UTCJul 26, 22:00 UTC35m
2026-07-26 SKW5511 SGF → DEN Jul 26, 18:15 UTCJul 26, 20:05 UTC1h 50m
2026-07-26 SKW5475 SFO → MFR Jul 26, 14:50 UTCJul 26, 16:50 UTC2h 0m
2026-07-26 SKW5293 DEN → XWA Jul 26, 11:20 UTCJul 26, 12:30 UTC1h 10m
2026-07-26 SKW5293 DEN → XWA Jul 26, 11:20 UTCJul 26, 12:15 UTC55m
2026-07-25 SKW5287 FAT → SFO Jul 25, 23:35 UTCJul 26, 00:30 UTC55m
2026-07-25 SKW4795 BUR → SFO Jul 25, 19:35 UTCJul 25, 21:10 UTC1h 35m
2026-07-25 SKW4795 BUR → SFO Jul 25, 19:30 UTCJul 25, 20:57 UTC1h 27m
2026-07-25 SKW5413 DEN → MRY Jul 25, 17:20 UTCJul 25, 18:30 UTC1h 10m
2026-07-25 SKW5332 SBA → SFO Jul 25, 13:30 UTCJul 25, 15:35 UTC2h 5m
2026-07-24 SKW5359 SUN → SFO Jul 24, 23:25 UTCJul 25, 01:55 UTC2h 30m
2026-07-24 SKW5837 SHV → IAH Jul 24, 20:45 UTCJul 24, 21:20 UTC35m
2026-07-24 SKW5253 LAX → SFO Jul 24, 17:10 UTCJul 24, 18:55 UTC1h 45m
2026-07-24 SKW5253 LAX → SFO Jul 24, 17:15 UTCJul 24, 19:07 UTC1h 52m
2026-07-24 SKW4640 ACV → LAX Jul 24, 13:15 UTCJul 24, 15:45 UTC2h 30m
2026-07-24 SKW5356 FAT → SFO Jul 24, 00:15 UTCJul 24, 02:25 UTC2h 10m
2026-07-23 SKW5540 BUR → SFO Jul 23, 19:45 UTCJul 23, 21:50 UTC2h 5m
2026-07-23 SKW572M SFO → RDD Jul 23, 17:45 UTCJul 23, 18:20 UTC35m
2026-07-23 SKW5596 MTY → SFO Jul 23, 13:00 UTCJul 23, 14:55 UTC1h 55m
2026-07-23 SKW5596 MTY → SFO Jul 23, 11:35 UTCJul 23, 12:00 UTC25m
2026-07-23 SKW5242 ORD → ROC Jul 23, 00:07 UTCJul 23, 01:01 UTC54m
2026-07-22 SKW5242 ORD → ROC Jul 22, 23:55 UTCJul 23, 01:10 UTC1h 15m
2026-07-22 SKW5580 ORD → COS Jul 22, 20:30 UTCJul 22, 22:05 UTC1h 35m
2026-07-22 SKW5580 ORD → COS Jul 22, 20:22 UTCJul 22, 22:03 UTC1h 41m
2026-07-22 SKW5397 TUL → IAH Jul 22, 17:45 UTCJul 22, 19:25 UTC1h 40m
2026-07-21 SKW5284 SFO → ONT Jul 21, 23:45 UTCJul 22, 15:00 UTC15h 15m
2026-07-21 SKW5376 ERI → ORD Jul 21, 20:45 UTCJul 21, 21:40 UTC55m
2026-07-21 SKW5692 CID → DEN Jul 21, 18:25 UTCJul 21, 19:35 UTC1h 10m
2026-07-21 SKW5504 LAX → ASE Jul 21, 14:50 UTCJul 21, 15:55 UTC1h 5m
2026-07-21 SKW6005 SUN → ORD Jul 21, 12:10 UTCJul 21, 13:20 UTC1h 10m
2026-07-21 SKW5615 - Jul 21, 09:35 UTCJul 21, 10:10 UTC35m
2026-07-21 SKW5303 ONT → SFO Jul 21, 04:00 UTCJul 21, 04:30 UTC30m
2026-07-21 SKW5303 ONT → SFO Jul 21, 04:03 UTCJul 21, 04:28 UTC25m
2026-07-20 SKW5435 - Jul 20, 23:00 UTCJul 20, 23:45 UTC45m
2026-07-20 SKW5985 DEN → BHM Jul 20, 21:10 UTCJul 20, 21:40 UTC30m
2026-07-20 SKW5985 DEN → BHM Jul 20, 21:12 UTCJul 20, 21:37 UTC25m
2026-07-20 SKW4746 - Jul 20, 18:25 UTCJul 20, 19:20 UTC55m
2026-07-20 SKW4648 MBS → ORD Jul 20, 16:00 UTCJul 20, 16:45 UTC45m
2026-07-20 SKW4673 ALB → ORD Jul 20, 12:35 UTCJul 20, 14:40 UTC2h 5m
2026-07-20 SKW4673 ALB → ORD Jul 20, 12:34 UTCJul 20, 14:19 UTC1h 45m
2026-07-19 SKW5451 - Jul 19, 20:15 UTCJul 19, 21:50 UTC1h 35m
2026-07-19 SKW4680 GSP → ORD Jul 19, 15:45 UTCJul 19, 17:30 UTC1h 45m
2026-07-19 SKW4680 GSP → ORD Jul 19, 15:40 UTCJul 19, 17:07 UTC1h 27m
2026-07-19 SKW5216 SJC → DEN Jul 19, 13:15 UTCJul 19, 14:35 UTC1h 20m
2026-07-19 SKW5216 SJC → DEN Jul 19, 13:21 UTCJul 19, 14:38 UTC1h 17m
2026-07-19 SKW4707 - Jul 19, 10:05 UTCJul 19, 10:25 UTC20m
2026-07-19 SKW5768 - Jul 19, 03:05 UTCJul 19, 03:30 UTC25m
2026-07-19 SKW6000 - Jul 19, 00:10 UTCJul 19, 01:40 UTC1h 30m
2026-07-18 SKW725M ORD → TYS Jul 18, 20:25 UTCJul 18, 21:35 UTC1h 10m
2026-07-18 SKW5266 OKC → IAH Jul 18, 14:50 UTCJul 18, 18:25 UTC3h 35m

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 N211SY page for operator, model, and routing details .

Mode-S A1BEE0 frequently asked

What is Mode-S code A1BEE0?
A1BEE0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N211SY.
Where is Mode-S A1BEE0 registered?
Mode-S code A1BEE0 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 A1BEE0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1BEE0, octal 50337340, decimal 10,600,160.
What flights does A1BEE0 operate?
Mode-S A1BEE0 has broadcast 20 distinct callsigns, including SKW5440, SKW5351, SKW4680, SKW6001, SKW5533.