Apparatus

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sensors Mode-S transponder

A2A823

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N270SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A2A823
Octal
50524043
Decimal
10,659,875
Country
US
Tail
N270SY
Type
E75L
No current signal · last broadcast 5h ago
Flights observed
420
Distinct callsigns
20
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A2A823.

Country allocation

The ICAO 24-bit address A2A823 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
SKW4473 SkyWest Airlines 26 2026-06-28
SKW3771 SkyWest Airlines 25 2026-06-28
SKW3904 SkyWest Airlines 15 2026-06-06
SKW3805 - 15 2026-07-04
SKW4111 - 11 2026-07-13
SKW4470 SkyWest Airlines 10 2026-06-29
SKW4038 SkyWest Airlines 10 2026-04-20
SKW3507 - 10 2026-07-13
SKW3690 SkyWest Airlines 9 2026-06-27
SKW3925 - 8 2026-06-29
SKW3579 - 7 2026-07-13
SKW4082 - 6 2026-07-09
SKW4011 - 6 2026-07-04
SKW3931 - 6 2026-06-26
SKW3761 SkyWest Airlines 6 2026-06-04
SKW3758 - 6 2026-07-07
SKW3744 SkyWest Airlines 6 2026-06-03
SKW3734 SkyWest Airlines 6 2026-06-01
SKW3723 - 6 2026-07-12
SKW3689 - 6 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SKW4111 ATL → DFW Jul 13, 21:05 UTCJul 13, 23:40 UTC2h 35m
2026-07-13 SKW3507 - Jul 13, 18:20 UTCJul 13, 19:45 UTC1h 25m
2026-07-13 SKW3507 - Jul 13, 15:35 UTCJul 13, 16:55 UTC1h 20m
2026-07-13 SKW4117 - Jul 13, 12:50 UTCJul 13, 14:10 UTC1h 20m
2026-07-13 SKW4095 ATL → SHV Jul 13, 02:55 UTCJul 13, 04:20 UTC1h 25m
2026-07-13 SKW3579 - Jul 13, 01:10 UTCJul 13, 01:40 UTC30m
2026-07-12 SKW3579 ATL → CHA Jul 12, 23:15 UTCJul 12, 23:45 UTC30m
2026-07-12 SKW3723 - Jul 12, 20:05 UTCJul 12, 21:45 UTC1h 40m
2026-07-12 SKW3723 ELH → ATL Jul 12, 19:26 UTCJul 12, 21:45 UTC2h 19m
2026-07-12 SKW3730 - Jul 12, 15:15 UTCJul 12, 16:45 UTC1h 30m
2026-07-12 SKW3946 - Jul 12, 11:15 UTCJul 12, 13:45 UTC2h 30m
2026-07-12 SKW4118 ATL → FAR Jul 12, 00:20 UTCJul 12, 02:55 UTC2h 35m
2026-07-11 SKW4097 - Jul 11, 22:30 UTCJul 11, 23:10 UTC40m
2026-07-11 SKW4097 - Jul 11, 18:05 UTCJul 11, 20:10 UTC2h 5m
2026-07-11 SKW4097 - Jul 11, 15:20 UTCJul 11, 16:55 UTC1h 35m
2026-07-11 SKW3946 - Jul 11, 11:25 UTCJul 11, 14:00 UTC2h 35m
2026-07-11 SKW4118 ATL → FAR Jul 11, 01:45 UTCJul 11, 04:25 UTC2h 40m
2026-07-11 SKW4118 ATL → FAR Jul 11, 01:44 UTCJul 11, 04:25 UTC2h 41m
2026-07-10 SKW4033 - Jul 10, 22:05 UTCJul 10, 23:30 UTC1h 25m
2026-07-10 SKW4033 - Jul 10, 18:55 UTCJul 10, 20:15 UTC1h 20m
2026-07-10 SKW3760 - Jul 10, 16:30 UTCJul 10, 17:30 UTC1h 0m
2026-07-10 SKW3760 - Jul 10, 14:15 UTCJul 10, 15:10 UTC55m
2026-07-10 SKW3905 - Jul 10, 11:10 UTCJul 10, 12:45 UTC1h 35m
2026-07-10 SKW4441 ATL → XNA Jul 10, 03:00 UTCJul 10, 04:30 UTC1h 30m
2026-07-09 SKW4111 - Jul 9, 23:20 UTCJul 10, 00:35 UTC1h 15m
2026-07-09 SKW4111 ATL → SHV Jul 9, 21:05 UTCJul 9, 22:25 UTC1h 20m
2026-07-09 SKW4082 - Jul 9, 17:05 UTCJul 9, 18:30 UTC1h 25m
2026-07-09 SKW4082 ATL → XNA Jul 9, 14:35 UTCJul 9, 16:00 UTC1h 25m
2026-07-09 SKW3905 - Jul 9, 11:10 UTCJul 9, 12:40 UTC1h 30m
2026-07-09 SKW4441 ATL → XNA Jul 9, 03:00 UTCJul 9, 04:25 UTC1h 25m
2026-07-08 SKW4111 - Jul 8, 22:30 UTCJul 8, 23:45 UTC1h 15m
2026-07-08 SKW4111 ATL → SHV Jul 8, 20:00 UTCJul 8, 21:25 UTC1h 25m
2026-07-08 SKW4082 - Jul 8, 17:05 UTCJul 8, 18:35 UTC1h 30m
2026-07-08 SKW4082 ATL → XNA Jul 8, 14:35 UTCJul 8, 16:00 UTC1h 25m
2026-07-08 SKW4107 - Jul 8, 10:10 UTCJul 8, 11:35 UTC1h 25m
2026-07-08 SKW4109 - Jul 8, 00:30 UTCJul 8, 01:50 UTC1h 20m
2026-07-07 SKW3723 - Jul 7, 21:50 UTCJul 7, 23:10 UTC1h 20m
2026-07-07 SKW3723 ELH → ATL Jul 7, 21:33 UTCJul 7, 23:06 UTC1h 33m
2026-07-07 SKW3730 MSP → MSN Jul 7, 18:50 UTCJul 7, 20:15 UTC1h 25m
2026-07-07 SKW3758 - Jul 7, 16:45 UTCJul 7, 17:45 UTC1h 0m
2026-07-07 SKW3760 - Jul 7, 14:00 UTCJul 7, 15:00 UTC1h 0m
2026-07-06 SKW3579 MSP → MSN Jul 6, 23:35 UTCJul 7, 00:05 UTC30m
2026-07-06 SKW3579 MSP → MSN Jul 6, 23:43 UTCJul 7, 00:04 UTC21m
2026-07-06 SKW3579 MSP → MSN Jul 6, 22:10 UTCJul 6, 22:35 UTC25m
2026-07-06 SKW3863 - Jul 6, 18:25 UTCJul 6, 19:50 UTC1h 25m
2026-07-06 SKW4064 - Jul 6, 15:15 UTCJul 6, 16:40 UTC1h 25m
2026-07-06 SKW3946 ORD → JFK Jul 6, 11:20 UTCJul 6, 13:50 UTC2h 30m
2026-07-06 SKW4118 OKC → LGA Jul 6, 02:55 UTCJul 6, 05:35 UTC2h 40m
2026-07-06 SKW4442 BOS → JFK Jul 6, 00:15 UTCJul 6, 01:40 UTC1h 25m
2026-07-05 SKW4442 BOS → JFK Jul 5, 19:45 UTCJul 5, 21:15 UTC1h 30m

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 N270SY page for operator, model, and routing details .

Mode-S A2A823 frequently asked

What is Mode-S code A2A823?
A2A823 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N270SY.
Where is Mode-S A2A823 registered?
Mode-S code A2A823 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 A2A823 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2A823, octal 50524043, decimal 10,659,875.
What flights does A2A823 operate?
Mode-S A2A823 has broadcast 20 distinct callsigns, including SKW4473, SKW3771, SKW3904, SKW3805, SKW4111.