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sensors Mode-S transponder

A5C504

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N471CA · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
A5C504
Octal
51342404
Decimal
10,863,876
Country
US
Tail
N471CA
Type
CRJ2
No current signal · last broadcast 2h ago
Flights observed
545
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A5C504.

Country allocation

The ICAO 24-bit address A5C504 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
SKW6009 - 8 2026-06-18
SKW6063 SkyWest Airlines 6 2026-06-26
SKW5617 - 6 2026-06-18
SKW5513 - 6 2026-07-12
SKW5031 SkyWest Airlines 6 2026-05-16
SKW6060 SkyWest Airlines 5 2026-05-16
SKW5927 SkyWest Airlines 5 2026-05-18
SKW5585 - 5 2026-07-12
SKW5224 SkyWest Airlines 5 2026-05-09
SKW5127 SkyWest Airlines 5 2026-05-16
SKW5089 - 5 2026-07-11
SKW5016 SkyWest Airlines 5 2026-06-08
SKW4670 SkyWest Airlines 5 2026-06-12
SKW5887 SkyWest Airlines 4 2026-06-18
SKW5804 SkyWest Airlines 4 2026-06-16
SKW5754 SkyWest Airlines 4 2026-05-31
SKW5710 SkyWest Airlines 4 2026-05-31
SKW5640 - 4 2026-06-21
SKW5456 SkyWest Airlines 4 2026-05-18
SKW5380 SkyWest Airlines 4 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW5078 - Jul 14, 02:05 UTCJul 14, 02:35 UTC30m
2026-07-14 SKW577P - Jul 14, 00:50 UTCJul 14, 01:10 UTC20m
2026-07-13 SKW5056 - Jul 13, 22:15 UTCJul 13, 23:15 UTC1h 0m
2026-07-13 SKW5056 SHR → DEN Jul 13, 21:08 UTCJul 13, 23:11 UTC2h 3m
2026-07-13 SKW5079 - Jul 13, 19:25 UTCJul 13, 20:10 UTC45m
2026-07-13 SKW5079 DEN → SHR Jul 13, 19:35 UTCJul 13, 20:14 UTC39m
2026-07-13 SKW5040 - Jul 13, 16:00 UTCJul 13, 16:50 UTC50m
2026-07-13 SKW5040 SHR → DEN Jul 13, 15:55 UTCJul 13, 16:54 UTC59m
2026-07-13 SKW420W DEN → BYG Jul 13, 14:05 UTCJul 13, 14:55 UTC50m
2026-07-13 SKW5829 - Jul 13, 11:15 UTCJul 13, 12:30 UTC1h 15m
2026-07-13 SKW5829 BIL → DEN Jul 13, 11:17 UTCJul 13, 12:28 UTC1h 11m
2026-07-13 SKW5257 DEN → BIL Jul 13, 03:27 UTCJul 13, 04:35 UTC1h 8m
2026-07-13 SKW5257 - Jul 13, 03:30 UTCJul 13, 04:35 UTC1h 5m
2026-07-13 SKW790J - Jul 13, 00:35 UTCJul 13, 02:01 UTC1h 25m
2026-07-12 SKW394P - Jul 12, 20:45 UTCJul 12, 21:35 UTC50m
2026-07-12 SKW376U - Jul 12, 18:25 UTCJul 12, 19:15 UTC50m
2026-07-12 SKW376U PRC → LAX Jul 12, 18:18 UTCJul 12, 19:15 UTC57m
2026-07-12 SKW474E - Jul 12, 14:40 UTCJul 12, 15:45 UTC1h 5m
2026-07-12 SKW5513 - Jul 12, 11:25 UTCJul 12, 12:05 UTC40m
2026-07-12 SKW5513 CPR → DEN Jul 12, 11:36 UTCJul 12, 12:04 UTC28m
2026-07-12 SKW5585 - Jul 12, 00:15 UTCJul 12, 01:00 UTC45m
2026-07-12 SKW5585 DEN → CPR Jul 12, 00:11 UTCJul 12, 00:57 UTC46m
2026-07-11 SKW5099 - Jul 11, 22:15 UTCJul 11, 22:55 UTC40m
2026-07-11 SKW5089 DEN → COD Jul 11, 18:03 UTCJul 11, 19:10 UTC1h 7m
2026-07-11 SKW5089 - Jul 11, 18:10 UTCJul 11, 18:50 UTC40m
2026-07-11 SKW4631 - Jul 11, 15:45 UTCJul 11, 16:25 UTC40m
2026-07-11 SKW4771 - Jul 11, 14:15 UTCJul 11, 14:50 UTC35m
2026-07-11 SKW4771 DEN → CPR Jul 11, 14:14 UTCJul 11, 14:52 UTC38m
2026-07-11 SKW5063 - Jul 11, 13:00 UTCJul 11, 13:20 UTC20m
2026-07-11 SKW583X - Jul 11, 04:30 UTCJul 11, 04:50 UTC20m
2026-07-11 SKW5227 - Jul 11, 03:01 UTCJul 11, 03:40 UTC40m
2026-07-11 SKW5817 - Jul 11, 01:20 UTCJul 11, 01:50 UTC30m
2026-07-10 SKW5817 DEN → DRO Jul 10, 23:52 UTCJul 11, 02:10 UTC2h 18m
2026-07-10 SKW4635 - Jul 10, 22:15 UTCJul 10, 22:50 UTC35m
2026-07-10 SKW5488 - Jul 10, 19:55 UTCJul 10, 20:15 UTC20m
2026-07-10 SKW5053 - Jul 10, 17:45 UTCJul 10, 19:00 UTC1h 15m
2026-07-10 SKW792R - Jul 10, 15:55 UTCJul 10, 17:00 UTC1h 5m
2026-07-10 SKW5513 - Jul 10, 13:15 UTCJul 10, 14:00 UTC45m
2026-07-10 SKW5513 CPR → DEN Jul 10, 13:21 UTCJul 10, 14:36 UTC1h 15m
2026-07-10 SKW5802 - Jul 10, 01:45 UTCJul 10, 02:25 UTC40m
2026-07-10 SKW5802 DEN → CPR Jul 10, 01:35 UTCJul 10, 02:27 UTC52m
2026-07-10 SKW4719 - Jul 10, 00:10 UTCJul 10, 00:30 UTC20m
2026-07-09 SKW5546 DEN → COS Jul 9, 22:00 UTCJul 9, 22:20 UTC20m
2026-07-09 SKW5024 - Jul 9, 20:10 UTCJul 9, 20:30 UTC20m
2026-07-09 SKW5024 - Jul 9, 18:40 UTCJul 9, 19:00 UTC20m
2026-07-09 SKW5112 - Jul 9, 15:40 UTCJul 9, 17:00 UTC1h 20m
2026-07-09 SKW6056 - Jul 9, 13:25 UTCJul 9, 14:10 UTC45m
2026-07-08 SKW5045 - Jul 8, 22:20 UTCJul 8, 23:40 UTC1h 20m
2026-07-08 SKW524C - Jul 8, 19:45 UTCJul 8, 21:00 UTC1h 15m
2026-07-08 SKW524C IAH → MGM Jul 8, 19:42 UTCJul 8, 21:02 UTC1h 20m

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 N471CA page for operator, model, and routing details .

Mode-S A5C504 frequently asked

What is Mode-S code A5C504?
A5C504 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N471CA.
Where is Mode-S A5C504 registered?
Mode-S code A5C504 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 A5C504 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5C504, octal 51342404, decimal 10,863,876.
What flights does A5C504 operate?
Mode-S A5C504 has broadcast 20 distinct callsigns, including SKW6009, SKW6063, SKW5617, SKW5513, SKW5031.