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sensors Mode-S transponder

ACAE9A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N916SW · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AILINES INC

Hex
ACAE9A
Octal
53127232
Decimal
11,316,890
Country
US
Tail
N916SW
Type
CRJ2
No current signal · last broadcast 4h ago
Flights observed
437
Distinct callsigns
20
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S ACAE9A.

Country allocation

The ICAO 24-bit address ACAE9A 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
SKW5126 SkyWest Airlines 6 2026-05-23
SKW5034 - 6 2026-07-09
SKW6067 - 5 2026-07-03
SKW5488 SkyWest Airlines 5 2026-05-28
SKW544C SkyWest Airlines 5 2026-05-02
SKW5096 - 5 2026-06-20
SKW5088 SkyWest Airlines 5 2026-05-10
SKW5087 SkyWest Airlines 5 2026-05-08
SKW5081 - 5 2026-06-16
SKW5028 SkyWest Airlines 5 2026-05-27
SKW4635 SkyWest Airlines 5 2026-05-28
SKW792R - 4 2026-07-02
SKW6058 SkyWest Airlines 4 2026-06-15
SKW5708 SkyWest Airlines 4 2026-05-20
SKW5581 - 4 2026-07-11
SKW5564 SkyWest Airlines 4 2026-06-01
SKW5289 SkyWest Airlines 4 2026-05-10
SKW5128 SkyWest Airlines 4 2026-05-08
SKW5061 SkyWest Airlines 4 2026-05-02
SKW5049 - 4 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 SKW5566 - Jul 11, 22:50 UTCJul 12, 00:05 UTC1h 15m
2026-07-11 SKW5402 - Jul 11, 14:30 UTCJul 11, 14:55 UTC25m
2026-07-11 SKW5581 - Jul 11, 11:35 UTCJul 11, 11:50 UTC15m
2026-07-11 SKW5581 ORD → MKE Jul 11, 11:30 UTCJul 11, 11:47 UTC17m
2026-07-10 SKW5783 - Jul 10, 19:55 UTCJul 10, 20:30 UTC35m
2026-07-10 SKW5783 FWA → ORD Jul 10, 19:45 UTCJul 10, 20:24 UTC39m
2026-07-10 SKW4645 - Jul 10, 16:20 UTCJul 10, 16:45 UTC25m
2026-07-10 SKW4645 ORD → FWA Jul 10, 15:58 UTCJul 10, 16:49 UTC51m
2026-07-10 SKW5997 - Jul 10, 13:50 UTCJul 10, 14:20 UTC30m
2026-07-10 SKW5997 MLI → ORD Jul 10, 13:35 UTCJul 10, 14:16 UTC41m
2026-07-10 SKW578A - Jul 10, 00:15 UTCJul 10, 00:40 UTC25m
2026-07-09 SKW578A ORD → MLI Jul 9, 23:25 UTCJul 10, 00:43 UTC1h 18m
2026-07-09 SKW5034 LNS → ORD Jul 9, 20:15 UTCJul 9, 21:55 UTC1h 40m
2026-07-09 SKW5034 LNS → ORD Jul 9, 20:07 UTCJul 9, 21:37 UTC1h 30m
2026-07-09 SKW5075 - Jul 9, 16:40 UTCJul 9, 18:50 UTC2h 10m
2026-07-09 SKW5075 ORD → LNS Jul 9, 16:38 UTCJul 9, 18:51 UTC2h 13m
2026-07-09 SKW5896 - Jul 9, 11:35 UTCJul 9, 12:00 UTC25m
2026-07-09 SKW5896 MKE → ORD Jul 9, 11:30 UTCJul 9, 11:55 UTC25m
2026-07-09 SKW478V - Jul 9, 01:20 UTCJul 9, 01:35 UTC15m
2026-07-09 SKW478V ORD → MKE Jul 9, 01:10 UTCJul 9, 01:30 UTC20m
2026-07-08 SKW5402 - Jul 8, 14:15 UTCJul 8, 14:50 UTC35m
2026-07-08 SKW5581 - Jul 8, 11:55 UTCJul 8, 12:15 UTC20m
2026-07-08 SKW5581 ORD → MKE Jul 8, 11:19 UTCJul 8, 12:12 UTC53m
2026-07-07 SKW5783 - Jul 7, 19:55 UTCJul 7, 20:30 UTC35m
2026-07-07 SKW4645 ORD → FWA Jul 7, 15:58 UTCJul 7, 16:17 UTC19m
2026-07-07 SKW4645 - Jul 7, 15:50 UTCJul 7, 16:15 UTC25m
2026-07-07 SKW5272 - Jul 7, 13:40 UTCJul 7, 14:20 UTC40m
2026-07-07 SKW5272 FWA → ORD Jul 7, 13:39 UTCJul 7, 14:06 UTC27m
2026-07-07 SKW5595 - Jul 7, 11:15 UTCJul 7, 11:40 UTC25m
2026-07-07 SKW5595 ORD → FWA Jul 7, 11:19 UTCJul 7, 11:44 UTC25m
2026-07-06 SKW4637 ATW → ORD Jul 6, 03:20 UTCJul 6, 04:00 UTC40m
2026-07-06 SKW4769 ORD → ATW Jul 6, 01:51 UTCJul 6, 02:25 UTC34m
2026-07-04 SKW5568 - Jul 4, 23:35 UTCJul 5, 00:05 UTC30m
2026-07-04 SKW5568 - Jul 4, 19:30 UTCJul 4, 21:30 UTC2h 0m
2026-07-04 SKW4798 ORD → CHA Jul 4, 17:00 UTCJul 4, 18:25 UTC1h 25m
2026-07-04 SKW5020 DEC → ORD Jul 4, 14:00 UTCJul 4, 15:10 UTC1h 10m
2026-07-04 SKW325H DEN → JLN Jul 4, 03:15 UTCJul 4, 04:40 UTC1h 25m
2026-07-04 SKW6064 WYS → DEN Jul 4, 00:00 UTCJul 4, 00:51 UTC51m
2026-07-03 SKW719V DEN → DEN Jul 3, 20:55 UTCJul 4, 01:00 UTC4h 5m
2026-07-03 SKW4764 - Jul 3, 16:40 UTCJul 3, 17:15 UTC35m
2026-07-03 SKW4790 - Jul 3, 14:40 UTCJul 3, 15:20 UTC40m
2026-07-03 SKW5040 - Jul 3, 11:30 UTCJul 3, 12:25 UTC55m
2026-07-03 SKW6067 - Jul 3, 03:20 UTCJul 3, 04:05 UTC45m
2026-07-03 SKW5391 - Jul 3, 01:55 UTCJul 3, 02:15 UTC20m
2026-07-02 SKW5308 DEN → COS Jul 2, 23:50 UTCJul 3, 00:05 UTC15m
2026-07-02 SKW5308 DEN → COS Jul 2, 23:36 UTCJul 3, 00:04 UTC28m
2026-07-02 SKW5474 - Jul 2, 21:35 UTCJul 2, 22:20 UTC45m
2026-07-02 SKW4797 - Jul 2, 19:50 UTCJul 2, 20:30 UTC40m
2026-07-02 SKW5053 - Jul 2, 17:10 UTCJul 2, 18:25 UTC1h 15m
2026-07-02 SKW792R - Jul 2, 14:40 UTCJul 2, 15:55 UTC1h 15m

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 N916SW page for operator, model, and routing details .

Mode-S ACAE9A frequently asked

What is Mode-S code ACAE9A?
ACAE9A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N916SW.
Where is Mode-S ACAE9A registered?
Mode-S code ACAE9A 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 ACAE9A broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACAE9A, octal 53127232, decimal 11,316,890.
What flights does ACAE9A operate?
Mode-S ACAE9A has broadcast 20 distinct callsigns, including SKW5126, SKW5034, SKW6067, SKW5488, SKW544C.