Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A57EE6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N453SW · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
A57EE6
Octal
51277346
Decimal
10,845,926
Country
US
Tail
N453SW
Type
CRJ2
No current signal · last broadcast Jul 26, 14:35 UTC
Flights observed
387
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 14:35 UTC

Last known position

Most recent position reported by Mode-S A57EE6.

Country allocation

The ICAO 24-bit address A57EE6 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
SKW5029 SkyWest Airlines 7 2026-07-23
SKW576U SkyWest Airlines 5 2026-07-23
SKW5118 SkyWest Airlines 5 2026-07-23
SKW5025 SkyWest Airlines 5 2026-07-23
SKW5916 SkyWest Airlines 4 2026-07-26
SKW5839 - 4 2026-07-01
SKW5320 - 4 2026-07-01
SKW5231 - 4 2026-07-17
SKW5215 SkyWest Airlines 4 2026-05-14
SKW5213 - 4 2026-06-30
SKW5141 SkyWest Airlines 4 2026-06-09
SKW5100 - 4 2026-07-16
SKW4790 - 4 2026-07-15
SKW4728 SkyWest Airlines 4 2026-06-13
SKW4633 SkyWest Airlines 4 2026-06-07
SKW6068 SkyWest Airlines 3 2026-06-16
SKW6058 SkyWest Airlines 3 2026-06-01
SKW5949 SkyWest Airlines 3 2026-06-13
SKW5912 SkyWest Airlines 3 2026-05-14
SKW5861 - 3 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5016 CMX → ORD Jul 26, 13:30 UTCJul 26, 14:35 UTC1h 5m
2026-07-26 SKW5016 CMX → ORD Jul 26, 13:32 UTCJul 26, 14:14 UTC42m
2026-07-26 SKW404X ORD → CMX Jul 26, 03:25 UTCJul 26, 04:10 UTC45m
2026-07-26 SKW5916 HDN → IAH Jul 26, 00:20 UTCJul 26, 00:35 UTC15m
2026-07-25 SKW5916 HDN → IAH Jul 25, 23:00 UTCJul 26, 00:35 UTC1h 35m
2026-07-25 SKW5916 HDN → IAH Jul 25, 23:03 UTCJul 26, 00:01 UTC58m
2026-07-25 SKW5930 ORD → FAR Jul 25, 19:35 UTCJul 25, 21:10 UTC1h 35m
2026-07-25 SKW5448 - Jul 25, 15:05 UTCJul 25, 16:20 UTC1h 15m
2026-07-25 SKW5448 FAR → ORD Jul 25, 15:15 UTCJul 25, 16:07 UTC52m
2026-07-25 SKW4789 MSO → SFO Jul 25, 03:00 UTCJul 25, 04:30 UTC1h 30m
2026-07-25 SKW4789 MSO → SFO Jul 25, 03:03 UTCJul 25, 04:24 UTC1h 21m
2026-07-24 SKW4808 MFR → SFO Jul 24, 22:50 UTCJul 24, 23:25 UTC35m
2026-07-24 SKW4808 MFR → SFO Jul 24, 22:54 UTCJul 24, 23:12 UTC18m
2026-07-24 SKW394J ORD → PIA Jul 24, 21:00 UTCJul 24, 21:30 UTC30m
2026-07-24 SKW5915 ORD → BNA Jul 24, 18:15 UTCJul 24, 18:55 UTC40m
2026-07-24 SKW5344 ORD → MSN Jul 24, 16:30 UTCJul 24, 17:10 UTC40m
2026-07-24 SKW5402 MKE → ORD Jul 24, 14:05 UTCJul 24, 14:30 UTC25m
2026-07-24 SKW5402 MKE → ORD Jul 24, 14:07 UTCJul 24, 14:20 UTC13m
2026-07-24 SKW5581 ORD → BNA Jul 24, 11:35 UTCJul 24, 11:50 UTC15m
2026-07-23 SKW5064 DEC → ORD Jul 23, 23:50 UTCJul 24, 00:25 UTC35m
2026-07-23 SKW5064 DEC → ORD Jul 23, 23:57 UTCJul 24, 00:04 UTC7m
2026-07-23 SKW5064 DEC → ORD Jul 23, 22:35 UTCJul 23, 23:05 UTC30m
2026-07-23 SKW5029 JST → ORD Jul 23, 18:45 UTCJul 23, 20:00 UTC1h 15m
2026-07-23 SKW576U IAD → JST Jul 23, 17:35 UTCJul 23, 17:55 UTC20m
2026-07-23 SKW5025 DEN → PRC Jul 23, 11:00 UTCJul 23, 11:30 UTC30m
2026-07-23 SKW5118 VCT → IAH Jul 23, 03:20 UTCJul 23, 03:30 UTC10m
2026-07-23 SKW5118 VCT → IAH Jul 23, 02:51 UTCJul 23, 03:43 UTC52m
2026-07-23 SKW5041 IAD → OGS Jul 23, 00:40 UTCJul 23, 01:10 UTC30m
2026-07-22 SKW5067 SGU → DEN Jul 22, 22:15 UTCJul 22, 23:35 UTC1h 20m
2026-07-22 SKW5723 SBN → ORD Jul 22, 10:06 UTCJul 22, 10:29 UTC23m
2026-07-19 SKW5274 GRB → ORD Jul 19, 04:50 UTCJul 19, 05:15 UTC25m
2026-07-18 SKW5029 - Jul 18, 20:30 UTCJul 18, 22:05 UTC1h 35m
2026-07-18 SKW5029 JST → ORD Jul 18, 20:21 UTCJul 18, 21:49 UTC1h 28m
2026-07-18 SKW572U ORD → JST Jul 18, 05:49 UTCJul 18, 06:26 UTC37m
2026-07-18 SKW572U - Jul 18, 05:25 UTCJul 18, 06:40 UTC1h 15m
2026-07-18 SKW5916 HDN → IAH Jul 18, 02:50 UTCJul 18, 04:15 UTC1h 25m
2026-07-17 SKW5930 - Jul 17, 19:45 UTCJul 17, 21:10 UTC1h 25m
2026-07-17 SKW4637 - Jul 17, 16:04 UTCJul 17, 16:49 UTC45m
2026-07-17 SKW4769 - Jul 17, 14:20 UTCJul 17, 14:50 UTC30m
2026-07-17 SKW5231 - Jul 17, 12:25 UTCJul 17, 12:45 UTC20m
2026-07-17 SKW5231 SBN → ORD Jul 17, 12:26 UTCJul 17, 12:42 UTC16m
2026-07-17 SKW5274 GRB → ORD Jul 17, 03:20 UTCJul 17, 03:45 UTC25m
2026-07-17 SKW4792 - Jul 17, 00:20 UTCJul 17, 01:35 UTC1h 15m
2026-07-16 SKW5296 - Jul 16, 22:00 UTCJul 16, 23:10 UTC1h 10m
2026-07-16 SKW5100 - Jul 16, 17:54 UTCJul 16, 18:55 UTC1h 0m
2026-07-16 SKW5100 FOD → ORD Jul 16, 17:52 UTCJul 16, 18:30 UTC38m
2026-07-16 SKW5119 DEN → FOD Jul 16, 13:59 UTCJul 16, 15:10 UTC1h 11m
2026-07-16 SKW5576 - Jul 16, 11:34 UTCJul 16, 12:05 UTC30m
2026-07-16 SKW5225 - Jul 16, 00:30 UTCJul 16, 01:00 UTC30m
2026-07-15 SKW5952 - Jul 15, 22:30 UTCJul 15, 23:25 UTC55m

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 N453SW page for operator, model, and routing details .

Mode-S A57EE6 frequently asked

What is Mode-S code A57EE6?
A57EE6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N453SW.
Where is Mode-S A57EE6 registered?
Mode-S code A57EE6 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 A57EE6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A57EE6, octal 51277346, decimal 10,845,926.
What flights does A57EE6 operate?
Mode-S A57EE6 has broadcast 20 distinct callsigns, including SKW5029, SKW576U, SKW5118, SKW5025, SKW5916.