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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 5h ago
Flights observed
315
Distinct callsigns
20
Country
US
Last broadcast
5h ago

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
SKW5839 - 4 2026-07-01
SKW576U - 4 2026-07-03
SKW5320 - 4 2026-07-01
SKW5215 SkyWest Airlines 4 2026-05-14
SKW5213 - 4 2026-06-30
SKW5141 SkyWest Airlines 4 2026-06-09
SKW5029 - 4 2026-07-02
SKW5025 - 4 2026-07-03
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
SKW5807 SkyWest Airlines 3 2026-06-13
SKW5739 - 3 2026-06-14
SKW5675 - 3 2026-06-27
SKW5436 SkyWest Airlines 3 2026-06-13
SKW5391 - 3 2026-06-27
SKW5308 - 3 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 SKW5547 - Jul 12, 01:20 UTCJul 12, 02:01 UTC40m
2026-07-11 SKW4719 COS → DEN Jul 11, 23:25 UTCJul 11, 23:50 UTC25m
2026-07-11 SKW5546 DEN → COS Jul 11, 21:55 UTCJul 11, 22:15 UTC20m
2026-07-11 SKW5546 DEN → COS Jul 11, 21:58 UTCJul 11, 22:12 UTC14m
2026-07-11 SKW5024 CYS → DEN Jul 11, 20:25 UTCJul 11, 20:50 UTC25m
2026-07-11 SKW5024 DEN → CYS Jul 11, 18:55 UTCJul 11, 19:10 UTC15m
2026-07-11 SKW4690 - Jul 11, 15:50 UTCJul 11, 16:20 UTC30m
2026-07-11 SKW510A - Jul 11, 14:05 UTCJul 11, 14:25 UTC20m
2026-07-11 SKW5032 - Jul 11, 11:50 UTCJul 11, 12:30 UTC40m
2026-07-11 SKW406P - Jul 11, 03:20 UTCJul 11, 04:05 UTC45m
2026-07-11 SKW5133 - Jul 11, 01:15 UTCJul 11, 02:20 UTC1h 5m
2026-07-11 SKW5133 LBL → DEN Jul 11, 01:17 UTCJul 11, 02:23 UTC1h 6m
2026-07-10 SKW450X - Jul 10, 22:50 UTCJul 10, 23:20 UTC30m
2026-07-10 SKW450X DEN → LBL Jul 10, 22:55 UTCJul 10, 23:40 UTC45m
2026-07-10 SKW6063 DEN → DEN Jul 10, 18:10 UTCJul 10, 21:55 UTC3h 45m
2026-07-10 SKW4764 - Jul 10, 16:35 UTCJul 10, 17:15 UTC40m
2026-07-10 SKW4790 DEN → DRO Jul 10, 14:30 UTCJul 10, 15:14 UTC44m
2026-07-10 SKW4790 - Jul 10, 14:25 UTCJul 10, 15:10 UTC45m
2026-07-10 SKW453A DEN → DEN Jul 10, 03:35 UTCJul 10, 05:15 UTC1h 40m
2026-07-10 SKW5116 - Jul 10, 01:10 UTCJul 10, 01:50 UTC40m
2026-07-09 SKW5116 - Jul 9, 21:15 UTCJul 9, 21:30 UTC15m
2026-07-09 SKW380F - Jul 9, 19:10 UTCJul 9, 19:30 UTC20m
2026-07-09 SKW5095 - Jul 9, 17:40 UTCJul 9, 18:15 UTC35m
2026-07-09 SKW5095 DDC → DEN Jul 9, 17:21 UTCJul 9, 18:14 UTC53m
2026-07-09 SKW442L - Jul 9, 15:55 UTCJul 9, 16:25 UTC30m
2026-07-09 SKW4677 COS → DEN Jul 9, 14:09 UTCJul 9, 14:30 UTC21m
2026-07-09 SKW4677 - Jul 9, 14:15 UTCJul 9, 14:35 UTC20m
2026-07-07 SKW5861 DEN → COS Jul 7, 00:15 UTCJul 7, 00:35 UTC20m
2026-07-06 SKW4635 - Jul 6, 21:45 UTCJul 6, 22:30 UTC45m
2026-07-06 SKW5488 - Jul 6, 19:40 UTCJul 6, 20:15 UTC35m
2026-07-06 SKW6078 DEN → DEN Jul 6, 14:25 UTCJul 6, 18:20 UTC3h 55m
2026-07-06 SKW5093 - Jul 6, 11:35 UTCJul 6, 12:00 UTC25m
2026-07-06 SKW5051 - Jul 6, 04:00 UTCJul 6, 04:20 UTC20m
2026-07-06 SKW5057 - Jul 6, 00:40 UTCJul 6, 02:00 UTC1h 20m
2026-07-06 SKW5057 ROW → DEN Jul 6, 00:32 UTCJul 6, 01:52 UTC1h 20m
2026-07-05 SKW768J - Jul 5, 22:25 UTCJul 5, 23:45 UTC1h 20m
2026-07-05 SKW422W - Jul 5, 19:15 UTCJul 5, 20:40 UTC1h 25m
2026-07-05 SKW5015 ORD → JLN Jul 5, 17:00 UTCJul 5, 18:20 UTC1h 20m
2026-07-05 SKW5015 ORD → JLN Jul 5, 17:05 UTCJul 5, 18:16 UTC1h 11m
2026-07-05 SKW5272 - Jul 5, 13:45 UTCJul 5, 14:25 UTC40m
2026-07-05 SKW5272 FWA → ORD Jul 5, 13:39 UTCJul 5, 14:12 UTC33m
2026-07-05 SKW5595 - Jul 5, 11:30 UTCJul 5, 11:55 UTC25m
2026-07-05 SKW5595 ORD → FWA Jul 5, 11:19 UTCJul 5, 12:15 UTC56m
2026-07-05 SKW5180 - Jul 5, 00:40 UTCJul 5, 02:00 UTC1h 20m
2026-07-04 SKW5180 IND → ORD Jul 4, 22:44 UTCJul 5, 01:43 UTC2h 59m
2026-07-04 SKW5065 - Jul 4, 01:05 UTCJul 4, 02:40 UTC1h 35m
2026-07-03 SKW5038 - Jul 3, 23:35 UTCJul 4, 00:00 UTC25m
2026-07-03 SKW5046 - Jul 3, 19:55 UTCJul 3, 20:25 UTC30m
2026-07-03 SKW576U - Jul 3, 18:25 UTCJul 3, 18:45 UTC20m
2026-07-03 SKW5025 MGW → IAD Jul 3, 10:50 UTCJul 3, 11:25 UTC35m

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 5h ago.
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 SKW5839, SKW576U, SKW5320, SKW5215, SKW5213.