Apparatus

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sensors Mode-S transponder

ACF146

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N933EV · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
ACF146
Octal
53170506
Decimal
11,333,958
Country
US
Tail
N933EV
Type
CRJ2
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
666
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S ACF146.

Country allocation

The ICAO 24-bit address ACF146 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
SKW4635 - 15 2026-07-01
SKW5488 - 14 2026-06-30
SKW5320 SkyWest Airlines 11 2026-07-21
SKW5839 SkyWest Airlines 9 2026-07-21
SKW382H SkyWest Airlines 9 2026-06-05
SKW5053 - 8 2026-06-18
SKW5034 SkyWest Airlines 8 2026-07-20
SKW5633 SkyWest Airlines 7 2026-07-23
SKW5075 - 7 2026-07-20
SKW4633 SkyWest Airlines 7 2026-07-23
SKW6068 SkyWest Airlines 6 2026-05-31
SKW5141 SkyWest Airlines 6 2026-07-24
SKW5080 SkyWest Airlines 6 2026-06-11
SKW5028 SkyWest Airlines 6 2026-06-12
SKW5916 - 5 2026-07-12
SKW5614 SkyWest Airlines 5 2026-06-17
SKW5128 SkyWest Airlines 5 2026-05-24
SKW5123 SkyWest Airlines 5 2026-06-15
SKW5091 - 5 2026-07-03
SKW5086 - 5 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4747 ORD → XNA Jul 26, 19:00 UTCJul 26, 19:45 UTC45m
2026-07-26 SKW789X ORD → DAY Jul 26, 17:25 UTCJul 26, 18:05 UTC40m
2026-07-26 SKW789X ORD → DAY Jul 26, 17:34 UTCJul 26, 18:05 UTC31m
2026-07-26 SKW5027 DEC → ORD Jul 26, 14:35 UTCJul 26, 15:15 UTC40m
2026-07-26 SKW319K ORD → FWA Jul 26, 12:55 UTCJul 26, 13:30 UTC35m
2026-07-26 SKW4714 FNT → ORD Jul 26, 10:35 UTCJul 26, 11:20 UTC45m
2026-07-25 SKW599E ORD → DEC Jul 25, 19:25 UTCJul 25, 20:10 UTC45m
2026-07-25 SKW599E ORD → DEC Jul 25, 19:30 UTCJul 25, 20:05 UTC35m
2026-07-25 SKW5399 BWI → LGA Jul 25, 15:30 UTCJul 25, 16:10 UTC40m
2026-07-25 SKW5399 BWI → LGA Jul 25, 15:39 UTCJul 25, 15:55 UTC16m
2026-07-25 SKW5842 - Jul 25, 13:50 UTCJul 25, 14:05 UTC15m
2026-07-25 SKW4714 FNT → ORD Jul 25, 11:55 UTCJul 25, 12:40 UTC45m
2026-07-25 SKW4714 FNT → ORD Jul 25, 12:02 UTCJul 25, 12:39 UTC37m
2026-07-24 SKW5258 RDM → SFO Jul 24, 23:15 UTCJul 25, 00:00 UTC45m
2026-07-24 SKW5141 DEN → SGU Jul 24, 19:40 UTCJul 24, 20:35 UTC55m
2026-07-24 SKW5141 DEN → SGU Jul 24, 19:40 UTCJul 24, 20:18 UTC38m
2026-07-24 SKW357K - Jul 24, 17:40 UTCJul 24, 18:20 UTC40m
2026-07-24 SKW5065 - Jul 24, 14:30 UTCJul 24, 15:55 UTC1h 25m
2026-07-24 SKW5065 LYH → ORD Jul 24, 14:45 UTCJul 24, 15:46 UTC1h 1m
2026-07-24 SKW5038 PLN → ORD Jul 24, 12:35 UTCJul 24, 13:00 UTC25m
2026-07-24 SKW5046 IAD → JST Jul 24, 10:50 UTCJul 24, 11:15 UTC25m
2026-07-24 SKW572U ORD → JST Jul 24, 03:25 UTCJul 24, 04:25 UTC1h 0m
2026-07-23 SKW4633 BOI → LAX Jul 23, 22:55 UTCJul 23, 23:40 UTC45m
2026-07-23 SKW5633 LEX → ORD Jul 23, 20:55 UTCJul 23, 21:30 UTC35m
2026-07-23 SKW4747 ORD → XNA Jul 23, 18:40 UTCJul 23, 19:40 UTC1h 0m
2026-07-23 SKW727R ORD → DAY Jul 23, 16:55 UTCJul 23, 17:40 UTC45m
2026-07-23 SKW5723 - Jul 23, 14:35 UTCJul 23, 14:50 UTC15m
2026-07-22 SKW5499 - Jul 22, 01:05 UTCJul 22, 01:25 UTC20m
2026-07-21 SKW4698 CVG → ORD Jul 21, 22:10 UTCJul 21, 23:15 UTC1h 5m
2026-07-21 SKW5563 BIH → SFO Jul 21, 20:00 UTCJul 21, 21:05 UTC1h 5m
2026-07-21 SKW5563 BIH → SFO Jul 21, 20:14 UTCJul 21, 20:53 UTC39m
2026-07-21 SKW5320 ORD → MKE Jul 21, 17:40 UTCJul 21, 18:25 UTC45m
2026-07-21 SKW5320 ORD → MKE Jul 21, 17:46 UTCJul 21, 18:25 UTC39m
2026-07-21 SKW5839 BFL → DEN Jul 21, 16:05 UTCJul 21, 16:40 UTC35m
2026-07-21 SKW5839 BFL → DEN Jul 21, 16:08 UTCJul 21, 16:33 UTC25m
2026-07-21 SKW4676 - Jul 21, 13:10 UTCJul 21, 14:05 UTC55m
2026-07-21 SKW4676 MBS → ORD Jul 21, 13:17 UTCJul 21, 13:50 UTC33m
2026-07-21 SKW5317 ORD → MEM Jul 21, 03:10 UTCJul 21, 03:55 UTC45m
2026-07-21 SKW5135 MCW → ORD Jul 21, 00:30 UTCJul 21, 01:20 UTC50m
2026-07-21 SKW5135 MCW → ORD Jul 21, 00:29 UTCJul 21, 01:04 UTC35m
2026-07-20 SKW6079 IAH → PAH Jul 20, 22:40 UTCJul 20, 23:45 UTC1h 5m
2026-07-20 SKW5034 SGU → LAX Jul 20, 19:10 UTCJul 20, 20:50 UTC1h 40m
2026-07-20 SKW5034 SGU → LAX Jul 20, 19:05 UTCJul 20, 20:27 UTC1h 22m
2026-07-20 SKW5075 - Jul 20, 16:40 UTCJul 20, 18:00 UTC1h 20m
2026-07-20 SKW5075 ORD → LNS Jul 20, 16:38 UTCJul 20, 18:06 UTC1h 28m
2026-07-20 SKW5016 - Jul 20, 13:55 UTCJul 20, 14:50 UTC55m
2026-07-20 SKW5016 CMX → ORD Jul 20, 13:22 UTCJul 20, 14:37 UTC1h 15m
2026-07-20 SKW404X - Jul 20, 03:15 UTCJul 20, 03:55 UTC40m
2026-07-19 SKW6013 MKE → ORD Jul 19, 23:35 UTCJul 20, 00:40 UTC1h 5m
2026-07-19 SKW503C ORD → DLH Jul 19, 21:05 UTCJul 19, 22:00 UTC55m

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 N933EV page for operator, model, and routing details .

Mode-S ACF146 frequently asked

What is Mode-S code ACF146?
ACF146 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N933EV.
Where is Mode-S ACF146 registered?
Mode-S code ACF146 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 ACF146 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACF146, octal 53170506, decimal 11,333,958.
What flights does ACF146 operate?
Mode-S ACF146 has broadcast 20 distinct callsigns, including SKW4635, SKW5488, SKW5320, SKW5839, SKW382H.