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 Jul 26, 22:45 UTC
Flights observed
474
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

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
SKW3507 SkyWest Airlines 14 2026-07-22
SKW4111 - 11 2026-07-13
SKW4470 SkyWest Airlines 10 2026-06-29
SKW4038 SkyWest Airlines 10 2026-04-20
SKW3579 - 10 2026-07-21
SKW3690 SkyWest Airlines 9 2026-06-27
SKW4011 - 8 2026-07-23
SKW3925 - 8 2026-06-29
SKW4117 SkyWest Airlines 7 2026-07-22
SKW3760 - 7 2026-07-14
SKW3758 - 7 2026-07-23
SKW4448 SkyWest Airlines 6 2026-07-22
SKW4442 - 6 2026-07-19
SKW4133 SkyWest Airlines 6 2026-07-23
SKW4118 - 6 2026-07-20
SKW4082 - 6 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3717 ORD → BOS Jul 26, 21:15 UTCJul 26, 22:45 UTC1h 30m
2026-07-26 SKW3718 BNA → JFK Jul 26, 18:25 UTCJul 26, 19:50 UTC1h 25m
2026-07-26 SKW3718 BNA → JFK Jul 26, 15:40 UTCJul 26, 17:15 UTC1h 35m
2026-07-26 SKW148E ATL → HPN Jul 26, 00:50 UTCJul 26, 02:00 UTC1h 10m
2026-07-25 SKW166C SEA → SJC Jul 25, 22:25 UTCJul 25, 22:55 UTC30m
2026-07-25 SKW4134 OAK → SLC Jul 25, 19:40 UTCJul 25, 21:00 UTC1h 20m
2026-07-25 SKW4134 OAK → SLC Jul 25, 17:10 UTCJul 25, 18:45 UTC1h 35m
2026-07-25 SKW105W YWG → MSP Jul 25, 14:10 UTCJul 25, 15:55 UTC1h 45m
2026-07-25 SKW3584 SLC → TUL Jul 25, 03:35 UTCJul 25, 05:30 UTC1h 55m
2026-07-25 SKW3728 MSP → SDF Jul 25, 00:40 UTCJul 25, 02:00 UTC1h 20m
2026-07-24 SKW3728 MSP → SDF Jul 24, 22:35 UTCJul 24, 23:50 UTC1h 15m
2026-07-24 SKW3880 SLC → HLN Jul 24, 18:20 UTCJul 24, 21:35 UTC3h 15m
2026-07-24 SKW4152 MEM → LGA Jul 24, 16:00 UTCJul 24, 17:15 UTC1h 15m
2026-07-24 SKW3729 SLC → ABQ Jul 24, 02:55 UTCJul 24, 04:10 UTC1h 15m
2026-07-23 SKW3737 DTW → MDW Jul 23, 23:45 UTCJul 24, 01:10 UTC1h 25m
2026-07-23 SKW3776 SJC → SEA Jul 23, 21:45 UTCJul 23, 22:55 UTC1h 10m
2026-07-23 SKW4133 SJC → SEA Jul 23, 19:10 UTCJul 23, 20:40 UTC1h 30m
2026-07-23 SKW4011 - Jul 23, 14:20 UTCJul 23, 17:00 UTC2h 40m
2026-07-23 SKW4011 ATL → ASE Jul 23, 14:03 UTCJul 23, 17:20 UTC3h 17m
2026-07-23 SKW3758 - Jul 23, 10:15 UTCJul 23, 11:15 UTC1h 0m
2026-07-23 SKW3939 ABY → ATL Jul 23, 01:30 UTCJul 23, 02:30 UTC1h 0m
2026-07-22 SKW4448 SLC → SJC Jul 22, 23:00 UTCJul 23, 00:00 UTC1h 0m
2026-07-22 SKW4448 SLC → SJC Jul 22, 20:55 UTCJul 22, 21:50 UTC55m
2026-07-22 SKW3507 BOS → MKE Jul 22, 18:20 UTCJul 22, 19:45 UTC1h 25m
2026-07-22 SKW3507 BOS → MKE Jul 22, 15:35 UTCJul 22, 16:50 UTC1h 15m
2026-07-22 SKW4117 HPN → ATL Jul 22, 13:00 UTCJul 22, 14:20 UTC1h 20m
2026-07-22 SKW4095 ATL → FWA Jul 22, 02:10 UTCJul 22, 03:35 UTC1h 25m
2026-07-21 SKW4448 - Jul 21, 22:50 UTCJul 21, 23:55 UTC1h 5m
2026-07-21 SKW4448 ATL → FAY Jul 21, 20:45 UTCJul 21, 21:35 UTC50m
2026-07-21 SKW3507 BOS → MKE Jul 21, 18:10 UTCJul 21, 19:30 UTC1h 20m
2026-07-21 SKW3507 BOS → MKE Jul 21, 15:40 UTCJul 21, 17:05 UTC1h 25m
2026-07-21 SKW4117 HPN → ATL Jul 21, 13:00 UTCJul 21, 14:20 UTC1h 20m
2026-07-21 SKW4095 ATL → FWA Jul 21, 03:10 UTCJul 21, 04:20 UTC1h 10m
2026-07-21 SKW3579 - Jul 21, 01:30 UTCJul 21, 02:00 UTC30m
2026-07-21 SKW3579 BNA → CHA Jul 21, 00:00 UTCJul 21, 00:25 UTC25m
2026-07-20 SKW3579 ATL → BNA Jul 20, 21:55 UTCJul 20, 23:00 UTC1h 5m
2026-07-20 SKW3863 MOT → MSP Jul 20, 18:50 UTCJul 20, 20:10 UTC1h 20m
2026-07-20 SKW4064 DTW → MSN Jul 20, 16:10 UTCJul 20, 17:30 UTC1h 20m
2026-07-20 SKW3946 - Jul 20, 11:20 UTCJul 20, 13:50 UTC2h 30m
2026-07-20 SKW4118 ATL → FAR Jul 20, 01:35 UTCJul 20, 04:25 UTC2h 50m
2026-07-19 SKW4442 - Jul 19, 22:35 UTCJul 20, 00:10 UTC1h 35m
2026-07-19 SKW4442 ATL → XNA Jul 19, 19:55 UTCJul 19, 21:20 UTC1h 25m
2026-07-19 SKW3924 - Jul 19, 14:35 UTCJul 19, 17:30 UTC2h 55m
2026-07-19 SKW3924 ASE → ATL Jul 19, 14:13 UTCJul 19, 17:25 UTC3h 12m
2026-07-19 SKW3704 - Jul 19, 02:20 UTCJul 19, 03:50 UTC1h 30m
2026-07-19 SKW3704 LAX → ASE Jul 19, 02:21 UTCJul 19, 04:05 UTC1h 44m
2026-07-18 SKW3738 DTW → CMH Jul 18, 23:40 UTCJul 19, 01:25 UTC1h 45m
2026-07-18 SKW3738 DTW → CMH Jul 18, 21:15 UTCJul 18, 21:35 UTC20m
2026-07-16 SKW4609 - Jul 16, 15:45 UTCJul 16, 18:50 UTC3h 5m
2026-07-14 SKW4109 ATL → SBN Jul 14, 23:55 UTCJul 15, 01:25 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 Jul 26, 22:45 UTC.
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, SKW3507.