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sensors Mode-S transponder

A59EF7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N461SW · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
A59EF7
Octal
51317367
Decimal
10,854,135
Country
US
Tail
N461SW
Type
CRJ2
No current signal · last broadcast 1h ago
Flights observed
618
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A59EF7.

Country allocation

The ICAO 24-bit address A59EF7 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
SKW5224 - 10 2026-07-01
SKW5952 - 9 2026-07-01
SKW5245 - 7 2026-07-11
SKW5103 SkyWest Airlines 7 2026-05-31
SKW6078 - 6 2026-07-10
SKW5505 - 6 2026-06-26
SKW5038 - 6 2026-06-23
SKW5025 - 6 2026-06-23
SKW5023 SkyWest Airlines 6 2026-06-07
SKW5585 - 5 2026-07-11
SKW5488 - 5 2026-07-11
SKW5119 SkyWest Airlines 5 2026-06-17
SKW5078 - 5 2026-07-09
SKW5067 - 5 2026-06-22
SKW5065 - 5 2026-06-23
SKW4771 SkyWest Airlines 5 2026-06-06
SKW6072 - 4 2026-07-01
SKW6065 - 4 2026-07-06
SKW6025 SkyWest Airlines 4 2026-06-10
SKW5915 - 4 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW313P - Jul 14, 03:30 UTCJul 14, 03:45 UTC15m
2026-07-14 SKW5530 - Jul 14, 00:25 UTCJul 14, 01:20 UTC55m
2026-07-14 SKW5530 MFE → IAH Jul 14, 00:20 UTCJul 14, 01:11 UTC51m
2026-07-13 SKW5368 - Jul 13, 21:55 UTCJul 13, 22:50 UTC55m
2026-07-13 SKW6066 - Jul 13, 19:25 UTCJul 13, 20:40 UTC1h 15m
2026-07-13 SKW535G - Jul 13, 15:00 UTCJul 13, 15:50 UTC50m
2026-07-13 SKW535G IAH → MEI Jul 13, 14:59 UTCJul 13, 16:01 UTC1h 2m
2026-07-12 SKW5136 - Jul 12, 20:05 UTCJul 12, 21:10 UTC1h 5m
2026-07-12 SKW536V - Jul 12, 18:01 UTCJul 12, 18:45 UTC45m
2026-07-12 SKW5069 - Jul 12, 15:10 UTCJul 12, 16:35 UTC1h 25m
2026-07-12 SKW393X - Jul 12, 03:05 UTCJul 12, 03:45 UTC40m
2026-07-11 SKW4635 - Jul 11, 21:50 UTCJul 11, 22:20 UTC30m
2026-07-11 SKW5488 - Jul 11, 19:50 UTCJul 11, 20:10 UTC20m
2026-07-11 SKW5245 - Jul 11, 17:30 UTCJul 11, 18:20 UTC50m
2026-07-11 SKW5245 CPR → DEN Jul 11, 17:36 UTCJul 11, 18:14 UTC38m
2026-07-11 SKW5585 - Jul 11, 02:15 UTCJul 11, 03:01 UTC45m
2026-07-11 SKW5585 DEN → CPR Jul 11, 01:06 UTCJul 11, 02:59 UTC1h 53m
2026-07-10 SKW5474 - Jul 10, 21:45 UTCJul 10, 22:40 UTC55m
2026-07-10 SKW4797 - Jul 10, 19:45 UTCJul 10, 20:25 UTC40m
2026-07-10 SKW4797 DEN → CPR Jul 10, 19:49 UTCJul 10, 20:22 UTC33m
2026-07-10 SKW6078 - Jul 10, 17:20 UTCJul 10, 18:05 UTC45m
2026-07-10 SKW6078 - Jul 10, 14:10 UTCJul 10, 14:55 UTC45m
2026-07-10 SKW6078 DEN → COD Jul 10, 14:13 UTCJul 10, 15:09 UTC56m
2026-07-10 SKW5093 - Jul 10, 11:45 UTCJul 10, 12:15 UTC30m
2026-07-10 SKW5051 - Jul 10, 04:10 UTCJul 10, 04:30 UTC20m
2026-07-10 SKW5051 DEN → RKS Jul 10, 04:01 UTCJul 10, 04:45 UTC44m
2026-07-10 SKW5057 - Jul 10, 01:40 UTCJul 10, 03:00 UTC1h 20m
2026-07-09 SKW768J - Jul 9, 22:10 UTCJul 9, 23:20 UTC1h 10m
2026-07-09 SKW5093 - Jul 9, 18:25 UTCJul 9, 18:50 UTC25m
2026-07-09 SKW5051 - Jul 9, 04:30 UTCJul 9, 05:05 UTC35m
2026-07-09 SKW5078 - Jul 9, 02:15 UTCJul 9, 02:50 UTC35m
2026-07-09 SKW5078 BFF → DEN Jul 9, 00:57 UTCJul 9, 02:38 UTC1h 41m
2026-07-08 SKW577P - Jul 8, 23:45 UTCJul 9, 00:05 UTC20m
2026-07-08 SKW5116 - Jul 8, 20:45 UTCJul 8, 21:20 UTC35m
2026-07-08 SKW380F - Jul 8, 18:35 UTCJul 8, 18:55 UTC20m
2026-07-08 SKW5095 DEN → DEN Jul 8, 14:25 UTCJul 8, 17:00 UTC2h 35m
2026-07-08 SKW5063 - Jul 8, 11:50 UTCJul 8, 12:15 UTC25m
2026-07-08 SKW583X DEN → CYS Jul 8, 05:05 UTCJul 8, 05:18 UTC13m
2026-07-08 SKW583X DEN → CYS Jul 8, 05:00 UTCJul 8, 05:25 UTC25m
2026-07-08 SKW5081 - Jul 8, 02:35 UTCJul 8, 04:00 UTC1h 25m
2026-07-08 SKW5081 - Jul 8, 01:15 UTCJul 8, 01:40 UTC25m
2026-07-07 SKW5081 DEN → FAR Jul 7, 22:25 UTCJul 8, 00:00 UTC1h 35m
2026-07-07 SKW5682 - Jul 7, 20:20 UTCJul 7, 21:00 UTC40m
2026-07-07 SKW4750 - Jul 7, 18:10 UTCJul 7, 18:45 UTC35m
2026-07-07 SKW4750 DEN → GCC Jul 7, 18:04 UTCJul 7, 18:51 UTC47m
2026-07-07 SKW5096 DIK → DEN Jul 7, 14:55 UTCJul 7, 16:13 UTC1h 18m
2026-07-07 SKW5096 DEN → DEN Jul 7, 03:20 UTCJul 7, 16:15 UTC12h 55m
2026-07-06 SKW5098 DEN → DEN Jul 6, 22:10 UTCJul 7, 02:15 UTC4h 5m
2026-07-06 SKW6065 - Jul 6, 20:35 UTCJul 6, 21:10 UTC35m
2026-07-06 SKW6065 - Jul 6, 18:30 UTCJul 6, 19:05 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 N461SW page for operator, model, and routing details .

Mode-S A59EF7 frequently asked

What is Mode-S code A59EF7?
A59EF7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N461SW.
Where is Mode-S A59EF7 registered?
Mode-S code A59EF7 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 A59EF7 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A59EF7, octal 51317367, decimal 10,854,135.
What flights does A59EF7 operate?
Mode-S A59EF7 has broadcast 20 distinct callsigns, including SKW5224, SKW5952, SKW5245, SKW5103, SKW6078.