Apparatus

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sensors Mode-S transponder

ACA9B6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N915EV · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
ACA9B6
Octal
53124666
Decimal
11,315,638
Country
US
Tail
N915EV
Type
CRJ2
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
550
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S ACA9B6.

Country allocation

The ICAO 24-bit address ACA9B6 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
SKW5100 SkyWest Airlines 8 2026-05-11
SKW5061 - 8 2026-06-29
SKW5400 SkyWest Airlines 6 2026-07-20
SKW5199 SkyWest Airlines 6 2026-06-07
SKW5121 SkyWest Airlines 6 2026-05-11
SKW5119 SkyWest Airlines 6 2026-06-04
SKW5907 - 5 2026-07-10
SKW5754 SkyWest Airlines 5 2026-05-22
SKW5231 SkyWest Airlines 5 2026-07-05
SKW5080 - 5 2026-07-03
SKW5053 - 5 2026-06-25
SKW6068 - 4 2026-06-26
SKW5957 - 4 2026-07-11
SKW5813 - 4 2026-07-11
SKW5576 SkyWest Airlines 4 2026-07-22
SKW5448 - 4 2026-07-15
SKW5225 - 4 2026-07-22
SKW5137 SkyWest Airlines 4 2026-07-26
SKW5114 SkyWest Airlines 4 2026-06-29
SKW5111 - 4 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5804 RNO → SFO Jul 26, 20:35 UTCJul 26, 21:00 UTC25m
2026-07-26 SKW5947 ASE → LAX Jul 26, 18:40 UTCJul 26, 19:00 UTC20m
2026-07-26 SKW5095 EAU → ORD Jul 26, 16:35 UTCJul 26, 17:15 UTC40m
2026-07-26 SKW424M DEN → BFF Jul 26, 14:20 UTCJul 26, 15:10 UTC50m
2026-07-26 SKW424M DEN → BFF Jul 26, 14:25 UTCJul 26, 15:00 UTC35m
2026-07-26 SKW5137 HYS → DEN Jul 26, 12:00 UTCJul 26, 12:45 UTC45m
2026-07-25 SKW453A DEN → HYS Jul 25, 22:40 UTCJul 25, 23:10 UTC30m
2026-07-25 SKW4694 ORD → PSP Jul 25, 19:35 UTCJul 25, 20:35 UTC1h 0m
2026-07-25 SKW4663 DEN → BIS Jul 25, 16:45 UTCJul 25, 17:40 UTC55m
2026-07-25 SKW4663 DEN → BIS Jul 25, 16:28 UTCJul 25, 18:03 UTC1h 35m
2026-07-25 SKW5829 SFO → RDM Jul 25, 11:05 UTCJul 25, 12:15 UTC1h 10m
2026-07-25 SKW5257 DTW → IAH Jul 25, 03:55 UTCJul 25, 05:05 UTC1h 10m
2026-07-25 SKW5755 GJT → DEN Jul 25, 02:25 UTCJul 25, 02:50 UTC25m
2026-07-24 SKW4770 DEN → GJT Jul 24, 23:45 UTCJul 25, 00:25 UTC40m
2026-07-24 SKW4635 GJT → DEN Jul 24, 22:10 UTCJul 24, 22:45 UTC35m
2026-07-24 SKW5488 MSN → ORD Jul 24, 19:40 UTCJul 24, 20:00 UTC20m
2026-07-24 SKW332T DEN → LBF Jul 24, 03:25 UTCJul 24, 16:30 UTC13h 5m
2026-07-24 SKW5023 CMX → ORD Jul 24, 01:00 UTCJul 24, 02:00 UTC1h 0m
2026-07-23 SKW5090 JMS → DEN Jul 23, 22:35 UTCJul 23, 23:10 UTC35m
2026-07-23 SKW5037 ORD → DEC Jul 23, 06:20 UTCJul 23, 21:20 UTC15h 0m
2026-07-23 SKW790J PRC → DEN Jul 23, 02:30 UTCJul 23, 04:05 UTC1h 35m
2026-07-22 SKW394P LAX → PRC Jul 22, 20:40 UTCJul 22, 21:30 UTC50m
2026-07-22 SKW376U PRC → LAX Jul 22, 18:30 UTCJul 22, 19:20 UTC50m
2026-07-22 SKW474E DEN → PRC Jul 22, 14:45 UTCJul 22, 15:55 UTC1h 10m
2026-07-22 SKW5576 ORD → LNK Jul 22, 11:25 UTCJul 22, 11:55 UTC30m
2026-07-22 SKW5225 - Jul 22, 02:15 UTCJul 22, 02:40 UTC25m
2026-07-21 SKW4734 DEN → COS Jul 21, 21:15 UTCJul 22, 00:50 UTC3h 35m
2026-07-21 SKW5649 SFO → ONT Jul 21, 18:18 UTCJul 21, 19:14 UTC56m
2026-07-21 SKW5649 SFO → ONT Jul 21, 18:10 UTCJul 21, 19:20 UTC1h 10m
2026-07-21 SKW5831 SFO → JAC Jul 21, 16:05 UTCJul 21, 17:10 UTC1h 5m
2026-07-21 SKW5576 ORD → LNK Jul 21, 11:30 UTCJul 21, 12:10 UTC40m
2026-07-21 SKW5225 - Jul 21, 00:30 UTCJul 21, 01:00 UTC30m
2026-07-20 SKW4635 - Jul 20, 22:05 UTCJul 20, 22:40 UTC35m
2026-07-20 SKW5488 - Jul 20, 20:10 UTCJul 20, 20:30 UTC20m
2026-07-20 SKW5400 ORD → GRR Jul 20, 16:43 UTCJul 20, 16:54 UTC11m
2026-07-20 SKW5400 ORD → GRR Jul 20, 16:30 UTCJul 20, 16:55 UTC25m
2026-07-20 SKW4744 DEN → COS Jul 20, 04:20 UTCJul 20, 04:35 UTC15m
2026-07-20 SKW5078 LBL → DEN Jul 20, 01:15 UTCJul 20, 01:40 UTC25m
2026-07-19 SKW577P DEN → JMS Jul 19, 23:25 UTCJul 19, 23:45 UTC20m
2026-07-19 SKW6072 DEN → ROW Jul 19, 11:45 UTCJul 19, 12:25 UTC40m
2026-07-19 SKW357Z DEN → EAR Jul 19, 03:05 UTCJul 19, 03:30 UTC25m
2026-07-18 SKW5019 - Jul 18, 23:35 UTCJul 19, 01:00 UTC1h 25m
2026-07-18 SKW527Y DEN → ATY Jul 18, 20:25 UTCJul 18, 21:35 UTC1h 10m
2026-07-18 SKW5037 - Jul 18, 16:45 UTCJul 18, 17:15 UTC30m
2026-07-18 SKW382H - Jul 18, 02:55 UTCJul 18, 03:35 UTC40m
2026-07-18 SKW4650 DEN → SJC Jul 18, 00:00 UTCJul 18, 01:00 UTC1h 0m
2026-07-17 SKW4650 DEN → SJC Jul 17, 23:43 UTCJul 18, 00:47 UTC1h 4m
2026-07-17 SKW4734 DEN → COS Jul 17, 20:44 UTCJul 17, 21:44 UTC1h 0m
2026-07-17 SKW4734 DEN → COS Jul 17, 20:52 UTCJul 17, 21:59 UTC1h 7m
2026-07-17 SKW5463 - Jul 17, 16:59 UTCJul 17, 18:10 UTC1h 10m

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 N915EV page for operator, model, and routing details .

Mode-S ACA9B6 frequently asked

What is Mode-S code ACA9B6?
ACA9B6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N915EV.
Where is Mode-S ACA9B6 registered?
Mode-S code ACA9B6 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 ACA9B6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA9B6, octal 53124666, decimal 11,315,638.
What flights does ACA9B6 operate?
Mode-S ACA9B6 has broadcast 20 distinct callsigns, including SKW5100, SKW5061, SKW5400, SKW5199, SKW5121.