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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 Jul 26, 20:45 UTC
Flights observed
628
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

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
SKW6065 - 4 2026-07-15
SKW5887 SkyWest Airlines 4 2026-06-18
SKW583X - 4 2026-07-22
SKW5817 - 4 2026-07-17
SKW5804 SkyWest Airlines 4 2026-06-16
SKW5754 SkyWest Airlines 4 2026-05-31
SKW5710 SkyWest Airlines 4 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5017 DEC → ORD Jul 26, 20:00 UTCJul 26, 20:45 UTC45m
2026-07-26 SKW562F ORD → CMX Jul 26, 18:05 UTCJul 26, 18:50 UTC45m
2026-07-26 SKW4637 SFO → ASE Jul 26, 16:10 UTCJul 26, 16:50 UTC40m
2026-07-26 SKW4769 CMH → ORD Jul 26, 14:25 UTCJul 26, 15:05 UTC40m
2026-07-26 SKW4639 BIH → SFO Jul 26, 11:30 UTCJul 26, 12:10 UTC40m
2026-07-25 SKW4772 DEN → TYS Jul 25, 23:20 UTCJul 25, 23:55 UTC35m
2026-07-25 SKW5335 PNS → DEN Jul 25, 19:55 UTCJul 25, 21:45 UTC1h 50m
2026-07-25 SKW5282 ORD → MSN Jul 25, 17:30 UTCJul 25, 18:50 UTC1h 20m
2026-07-25 SKW5282 ORD → MSN Jul 25, 17:32 UTCJul 25, 18:49 UTC1h 17m
2026-07-25 SKW5088 MEI → IAH Jul 25, 13:20 UTCJul 25, 14:25 UTC1h 5m
2026-07-24 SKW730C IAH → MEI Jul 24, 22:20 UTCJul 24, 23:10 UTC50m
2026-07-24 SKW5136 PIB → IAH Jul 24, 19:55 UTCJul 24, 20:50 UTC55m
2026-07-24 SKW5136 PIB → IAH Jul 24, 20:07 UTCJul 24, 20:42 UTC35m
2026-07-24 SKW536V IAH → PIB Jul 24, 18:05 UTCJul 24, 19:00 UTC55m
2026-07-24 SKW5069 SLN → IAH Jul 24, 15:25 UTCJul 24, 17:00 UTC1h 35m
2026-07-24 SKW483J IAH → SLN Jul 24, 01:25 UTCJul 24, 02:50 UTC1h 25m
2026-07-23 SKW5044 PBG → IAD Jul 23, 21:35 UTCJul 23, 21:55 UTC20m
2026-07-23 SKW753F IAH → AEX Jul 23, 19:40 UTCJul 23, 20:00 UTC20m
2026-07-23 SKW788P ABI → IAH Jul 23, 17:25 UTCJul 23, 18:15 UTC50m
2026-07-23 SKW425P DEN → ATY Jul 23, 15:00 UTCJul 23, 16:15 UTC1h 15m
2026-07-23 SKW5391 TUS → SFO Jul 23, 04:10 UTCJul 23, 04:35 UTC25m
2026-07-23 SKW5308 EUG → SFO Jul 23, 02:45 UTCJul 23, 03:20 UTC35m
2026-07-22 SKW5116 DEN → RKS Jul 22, 21:15 UTCJul 22, 22:00 UTC45m
2026-07-22 SKW5116 DEN → RKS Jul 22, 20:55 UTCJul 22, 22:05 UTC1h 10m
2026-07-22 SKW380F DEN → HYS Jul 22, 19:10 UTCJul 22, 19:25 UTC15m
2026-07-22 SKW5095 EAU → ORD Jul 22, 16:30 UTCJul 22, 17:10 UTC40m
2026-07-22 SKW442L DEN → DDC Jul 22, 14:30 UTCJul 22, 15:00 UTC30m
2026-07-22 SKW5063 ORD → CMX Jul 22, 12:05 UTCJul 22, 12:25 UTC20m
2026-07-22 SKW583X DEN → CYS Jul 22, 03:20 UTCJul 22, 03:50 UTC30m
2026-07-22 SKW5103 ORD → JLN Jul 22, 00:20 UTCJul 22, 01:15 UTC55m
2026-07-22 SKW5103 ORD → JLN Jul 22, 00:13 UTCJul 22, 01:06 UTC53m
2026-07-21 SKW5103 ORD → JLN Jul 21, 22:00 UTCJul 21, 22:45 UTC45m
2026-07-21 SKW4674 DEN → DEN Jul 21, 16:25 UTCJul 21, 19:55 UTC3h 30m
2026-07-21 SKW5085 EAR → DEN Jul 21, 11:45 UTCJul 21, 12:20 UTC35m
2026-07-21 SKW359C DEN → LAR Jul 21, 04:15 UTCJul 21, 04:40 UTC25m
2026-07-21 SKW5057 COS → DEN Jul 21, 00:40 UTCJul 21, 02:05 UTC1h 25m
2026-07-20 SKW768J DEN → LBF Jul 20, 22:30 UTCJul 20, 23:40 UTC1h 10m
2026-07-20 SKW768J DEN → LBF Jul 20, 22:15 UTCJul 20, 23:40 UTC1h 25m
2026-07-20 SKW422W ORD → DEC Jul 20, 19:10 UTCJul 20, 20:35 UTC1h 25m
2026-07-20 SKW5015 BFF → DEN Jul 20, 16:50 UTCJul 20, 18:05 UTC1h 15m
2026-07-20 SKW5015 BFF → DEN Jul 20, 17:03 UTCJul 20, 18:00 UTC57m
2026-07-20 SKW5027 DEC → ORD Jul 20, 14:40 UTCJul 20, 15:15 UTC35m
2026-07-20 SKW5027 DEC → ORD Jul 20, 14:49 UTCJul 20, 15:04 UTC15m
2026-07-20 SKW598C ORD → SUX Jul 20, 12:55 UTCJul 20, 13:20 UTC25m
2026-07-20 SKW4714 FNT → ORD Jul 20, 10:35 UTCJul 20, 11:15 UTC40m
2026-07-19 SKW5258 RDM → SFO Jul 19, 23:25 UTCJul 20, 00:00 UTC35m
2026-07-19 SKW6075 - Jul 19, 18:40 UTCJul 19, 20:20 UTC1h 40m
2026-07-19 SKW484C - Jul 19, 16:05 UTCJul 19, 17:25 UTC1h 20m
2026-07-19 SKW4794 SBN → ORD Jul 19, 13:20 UTCJul 19, 14:05 UTC45m
2026-07-19 SKW5499 - Jul 19, 03:40 UTCJul 19, 04:00 UTC20m

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 Jul 26, 20:45 UTC.
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.