Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A5AA1C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N464SW · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
A5AA1C
Octal
51325034
Decimal
10,856,988
Country
US
Tail
N464SW
Type
CRJ2
No current signal · last broadcast Jul 25, 03:30 UTC
Flights observed
662
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 03:30 UTC

Last known position

Most recent position reported by Mode-S A5AA1C.

Country allocation

The ICAO 24-bit address A5AA1C 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
SKW5141 SkyWest Airlines 7 2026-07-08
SKW4797 - 7 2026-06-14
SKW6059 SkyWest Airlines 6 2026-07-20
SKW5809 - 6 2026-06-14
SKW5106 - 6 2026-06-27
SKW5099 - 6 2026-06-17
SKW5081 SkyWest Airlines 6 2026-05-17
SKW5054 - 6 2026-06-19
SKW5047 SkyWest Airlines 6 2026-06-09
SKW5031 - 6 2026-06-16
SKW474E - 6 2026-06-19
SKW6079 SkyWest Airlines 5 2026-07-19
SKW6077 - 5 2026-07-01
SKW6063 SkyWest Airlines 5 2026-06-12
SKW5614 SkyWest Airlines 5 2026-06-16
SKW5263 - 5 2026-07-17
SKW5224 SkyWest Airlines 5 2026-07-24
SKW5127 SkyWest Airlines 5 2026-05-11
SKW5090 SkyWest Airlines 5 2026-06-17
SKW5079 - 5 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 SKW5952 DRO → DEN Jul 25, 02:35 UTCJul 25, 03:25 UTC50m
2026-07-24 SKW5224 DEN → DRO Jul 24, 19:50 UTCJul 24, 20:25 UTC35m
2026-07-24 SKW5224 DEN → DRO Jul 24, 19:50 UTCJul 24, 20:31 UTC41m
2026-07-24 SKW5137 HYS → DEN Jul 24, 18:20 UTCJul 24, 18:55 UTC35m
2026-07-24 SKW435T BOI → SFO Jul 24, 14:05 UTCJul 24, 14:35 UTC30m
2026-07-24 SKW435T BOI → SFO Jul 24, 14:03 UTCJul 24, 14:45 UTC42m
2026-07-24 SKW561V SUX → DEN Jul 24, 00:35 UTCJul 24, 01:55 UTC1h 20m
2026-07-23 SKW330Z ORD → SUX Jul 23, 21:15 UTCJul 23, 22:15 UTC1h 0m
2026-07-23 SKW5714 SJC → DEN Jul 23, 18:45 UTCJul 23, 19:50 UTC1h 5m
2026-07-23 SKW5714 SJC → DEN Jul 23, 18:43 UTCJul 23, 19:17 UTC34m
2026-07-23 SKW5234 MLI → ORD Jul 23, 16:45 UTCJul 23, 17:25 UTC40m
2026-07-23 SKW5016 - Jul 23, 13:35 UTCJul 23, 14:40 UTC1h 5m
2026-07-23 SKW404X ORD → CMX Jul 23, 03:45 UTCJul 23, 04:25 UTC40m
2026-07-23 SKW6013 MKE → ORD Jul 23, 00:50 UTCJul 23, 02:15 UTC1h 25m
2026-07-22 SKW503C ORD → DLH Jul 22, 22:20 UTCJul 22, 23:15 UTC55m
2026-07-22 SKW4747 ORD → XNA Jul 22, 19:35 UTCJul 22, 20:30 UTC55m
2026-07-22 SKW727R ORD → DAY Jul 22, 17:40 UTCJul 22, 18:20 UTC40m
2026-07-22 SKW5036 - Jul 22, 14:55 UTCJul 22, 15:45 UTC50m
2026-07-22 SKW486F - Jul 22, 13:05 UTCJul 22, 14:00 UTC55m
2026-07-22 SKW5124 SUX → ORD Jul 22, 03:40 UTCJul 22, 04:25 UTC45m
2026-07-22 SKW6073 - Jul 22, 00:35 UTCJul 22, 02:05 UTC1h 30m
2026-07-22 SKW6073 CKB → ORD Jul 22, 00:29 UTCJul 22, 01:59 UTC1h 30m
2026-07-21 SKW6074 ORD → LAF Jul 21, 22:50 UTCJul 21, 23:50 UTC1h 0m
2026-07-21 SKW5783 - Jul 21, 19:40 UTCJul 21, 20:10 UTC30m
2026-07-21 SKW4645 - Jul 21, 15:50 UTCJul 21, 16:15 UTC25m
2026-07-21 SKW4645 ORD → FWA Jul 21, 15:58 UTCJul 21, 16:19 UTC21m
2026-07-21 SKW5910 LNK → ORD Jul 21, 12:50 UTCJul 21, 13:50 UTC1h 0m
2026-07-21 SKW5910 LNK → ORD Jul 21, 12:35 UTCJul 21, 14:05 UTC1h 30m
2026-07-20 SKW5439 - Jul 20, 23:35 UTCJul 21, 01:05 UTC1h 29m
2026-07-20 SKW5439 ORD → LNK Jul 20, 23:18 UTCJul 21, 01:04 UTC1h 46m
2026-07-20 SKW6059 DEN → LBL Jul 20, 20:10 UTCJul 20, 21:00 UTC50m
2026-07-20 SKW6069 - Jul 20, 18:35 UTCJul 20, 19:15 UTC40m
2026-07-20 SKW5065 LYH → ORD Jul 20, 14:45 UTCJul 20, 15:40 UTC55m
2026-07-20 SKW5065 - Jul 20, 14:25 UTCJul 20, 15:55 UTC1h 30m
2026-07-20 SKW5038 - Jul 20, 12:35 UTCJul 20, 13:10 UTC35m
2026-07-20 SKW5046 IAD → JST Jul 20, 11:00 UTCJul 20, 11:25 UTC25m
2026-07-20 SKW572U - Jul 20, 03:45 UTCJul 20, 04:55 UTC1h 10m
2026-07-20 SKW572U ORD → JST Jul 20, 04:00 UTCJul 20, 04:54 UTC54m
2026-07-20 SKW5653 - Jul 20, 01:00 UTCJul 20, 01:40 UTC40m
2026-07-19 SKW5555 ORD → MKE Jul 19, 23:25 UTCJul 19, 23:45 UTC20m
2026-07-19 SKW4747 ORD → XNA Jul 19, 18:50 UTCJul 19, 19:55 UTC1h 5m
2026-07-19 SKW727R - Jul 19, 17:15 UTCJul 19, 17:55 UTC40m
2026-07-19 SKW5402 - Jul 19, 14:05 UTCJul 19, 14:55 UTC50m
2026-07-19 SKW5581 ORD → MKE Jul 19, 11:30 UTCJul 19, 11:50 UTC20m
2026-07-19 SKW5135 MCW → ORD Jul 19, 02:50 UTCJul 19, 03:40 UTC50m
2026-07-19 SKW6079 IAH → PAH Jul 19, 01:05 UTCJul 19, 01:55 UTC50m
2026-07-18 SKW4747 ORD → XNA Jul 18, 22:30 UTCJul 18, 23:30 UTC1h 0m
2026-07-18 SKW4747 ORD → XNA Jul 18, 22:14 UTCJul 18, 23:14 UTC1h 0m
2026-07-18 SKW727R - Jul 18, 17:00 UTCJul 18, 17:45 UTC45m
2026-07-18 SKW5910 - Jul 18, 13:10 UTCJul 18, 14:30 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 N464SW page for operator, model, and routing details .

Mode-S A5AA1C frequently asked

What is Mode-S code A5AA1C?
A5AA1C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N464SW.
Where is Mode-S A5AA1C registered?
Mode-S code A5AA1C 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 A5AA1C broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 03:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5AA1C, octal 51325034, decimal 10,856,988.
What flights does A5AA1C operate?
Mode-S A5AA1C has broadcast 20 distinct callsigns, including SKW5141, SKW4797, SKW6059, SKW5809, SKW5106.