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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 Jul 26, 17:50 UTC
Flights observed
704
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 17:50 UTC

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
SKW5952 SkyWest Airlines 11 2026-07-23
SKW5224 SkyWest Airlines 11 2026-07-23
SKW5245 - 8 2026-07-20
SKW5139 - 8 2026-07-17
SKW5103 SkyWest Airlines 7 2026-05-31
SKW5023 SkyWest Airlines 7 2026-07-26
SKW6078 - 6 2026-07-10
SKW6025 SkyWest Airlines 6 2026-07-20
SKW5505 - 6 2026-06-26
SKW5038 - 6 2026-06-23
SKW5025 - 6 2026-06-23
SKW4771 SkyWest Airlines 6 2026-07-25
SKW5585 - 5 2026-07-11
SKW5564 - 5 2026-07-20
SKW5488 - 5 2026-07-11
SKW5119 SkyWest Airlines 5 2026-06-17
SKW5086 - 5 2026-07-18
SKW5078 - 5 2026-07-09
SKW5067 - 5 2026-06-22
SKW5065 - 5 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5522 LEX → ORD Jul 26, 16:50 UTCJul 26, 17:35 UTC45m
2026-07-26 SKW5522 LEX → ORD Jul 26, 16:46 UTCJul 26, 17:36 UTC50m
2026-07-26 SKW5518 SFO → JAC Jul 26, 14:20 UTCJul 26, 15:00 UTC40m
2026-07-26 SKW5518 SFO → JAC Jul 26, 14:20 UTCJul 26, 15:06 UTC46m
2026-07-26 SKW406P DEN → COD Jul 26, 03:20 UTCJul 26, 13:10 UTC9h 51m
2026-07-26 SKW5023 CMX → ORD Jul 26, 01:05 UTCJul 26, 01:45 UTC40m
2026-07-25 SKW5090 JMS → DEN Jul 25, 23:15 UTCJul 25, 23:45 UTC30m
2026-07-25 SKW5089 MEI → IAH Jul 25, 18:00 UTCJul 25, 22:05 UTC4h 5m
2026-07-25 SKW4631 DEN → LBB Jul 25, 15:40 UTCJul 25, 16:25 UTC45m
2026-07-25 SKW4771 ORD → ICT Jul 25, 13:55 UTCJul 25, 14:35 UTC40m
2026-07-25 SKW5130 RIW → DEN Jul 25, 11:31 UTCJul 25, 12:07 UTC36m
2026-07-25 SKW355X DEN → RIW Jul 25, 03:15 UTCJul 25, 03:55 UTC40m
2026-07-25 SKW6064 MEI → IAH Jul 25, 00:03 UTCJul 25, 00:51 UTC48m
2026-07-24 SKW719V DEN → WYS Jul 24, 21:00 UTCJul 24, 21:50 UTC50m
2026-07-24 SKW5102 ORD → CIU Jul 24, 16:40 UTCJul 24, 17:45 UTC1h 5m
2026-07-24 SKW5102 ORD → CIU Jul 24, 16:41 UTCJul 24, 18:17 UTC1h 36m
2026-07-24 SKW542U DEN → DVL Jul 24, 14:00 UTCJul 24, 15:20 UTC1h 20m
2026-07-24 SKW5576 ORD → LNK Jul 24, 11:35 UTCJul 24, 12:00 UTC25m
2026-07-24 SKW5225 XWA → DEN Jul 24, 00:35 UTCJul 24, 01:05 UTC30m
2026-07-23 SKW5952 DRO → DEN Jul 23, 21:40 UTCJul 23, 22:35 UTC55m
2026-07-23 SKW5952 DRO → DEN Jul 23, 21:44 UTCJul 23, 22:34 UTC50m
2026-07-23 SKW5224 DEN → DRO Jul 23, 19:50 UTCJul 23, 20:20 UTC30m
2026-07-23 SKW5522 - Jul 23, 17:05 UTCJul 23, 17:50 UTC45m
2026-07-23 SKW5518 - Jul 23, 15:30 UTCJul 23, 16:05 UTC35m
2026-07-23 SKW5109 ORD → EAU Jul 23, 11:30 UTCJul 23, 12:35 UTC1h 5m
2026-07-22 SKW730V ORD → SLN Jul 22, 23:10 UTCJul 23, 00:25 UTC1h 15m
2026-07-22 SKW5134 MGW → ORD Jul 22, 20:44 UTCJul 22, 21:37 UTC53m
2026-07-22 SKW5134 MGW → ORD Jul 22, 20:30 UTCJul 22, 21:55 UTC1h 25m
2026-07-22 SKW5138 - Jul 22, 18:30 UTCJul 22, 19:30 UTC1h 0m
2026-07-22 SKW5807 PIA → ORD Jul 22, 16:00 UTCJul 22, 16:30 UTC30m
2026-07-22 SKW5949 SFO → SBP Jul 22, 14:10 UTCJul 22, 14:45 UTC35m
2026-07-22 SKW5949 SFO → SBP Jul 22, 14:19 UTCJul 22, 14:42 UTC23m
2026-07-22 SKW5432 DEN → SJC Jul 22, 11:35 UTCJul 22, 12:40 UTC1h 5m
2026-07-22 SKW5432 DEN → SJC Jul 22, 11:16 UTCJul 22, 12:33 UTC1h 17m
2026-07-21 SKW5439 - Jul 21, 23:15 UTCJul 22, 00:30 UTC1h 15m
2026-07-21 SKW6075 ROW → DEN Jul 21, 18:40 UTCJul 21, 20:10 UTC1h 30m
2026-07-21 SKW6075 ROW → DEN Jul 21, 18:50 UTCJul 21, 19:50 UTC1h 0m
2026-07-21 SKW484C - Jul 21, 16:10 UTCJul 21, 17:35 UTC1h 25m
2026-07-21 SKW5071 SUX → ORD Jul 21, 13:25 UTCJul 21, 14:50 UTC1h 25m
2026-07-21 SKW479K DEN → SUX Jul 21, 03:30 UTCJul 21, 04:35 UTC1h 5m
2026-07-21 SKW5098 DIK → DEN Jul 21, 00:32 UTCJul 21, 01:42 UTC1h 10m
2026-07-20 SKW5098 DIK → DEN Jul 20, 22:35 UTCJul 21, 01:55 UTC3h 19m
2026-07-20 SKW5245 - Jul 20, 17:45 UTCJul 20, 18:30 UTC45m
2026-07-20 SKW5743 STS → SFO Jul 20, 16:00 UTCJul 20, 16:40 UTC40m
2026-07-20 SKW5564 - Jul 20, 13:40 UTCJul 20, 14:25 UTC45m
2026-07-20 SKW6025 SLC → DEN Jul 20, 03:05 UTCJul 20, 03:45 UTC40m
2026-07-20 SKW6025 SLC → DEN Jul 20, 03:01 UTCJul 20, 03:53 UTC52m
2026-07-20 SKW5227 ORD → PIT Jul 20, 01:10 UTCJul 20, 01:55 UTC45m
2026-07-20 SKW5227 ORD → PIT Jul 20, 01:03 UTCJul 20, 01:45 UTC42m
2026-07-19 SKW5817 - Jul 19, 22:15 UTCJul 19, 22:40 UTC25m

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 Jul 26, 17:50 UTC.
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 SKW5952, SKW5224, SKW5245, SKW5139, SKW5103.