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 5h ago
Flights observed
588
Distinct callsigns
20
Country
US
Last broadcast
5h ago

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
SKW382H SkyWest Airlines 9 2026-06-05
SKW5053 - 8 2026-06-18
SKW5320 - 7 2026-07-13
SKW6068 SkyWest Airlines 6 2026-05-31
SKW5839 - 6 2026-07-13
SKW5080 SkyWest Airlines 6 2026-06-11
SKW5034 - 6 2026-07-08
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
SKW5075 - 5 2026-07-08
SKW5058 - 5 2026-07-03
SKW5042 SkyWest Airlines 5 2026-06-17
SKW5037 - 5 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SKW578A - Jul 13, 23:10 UTCJul 13, 23:30 UTC20m
2026-07-13 SKW5675 - Jul 13, 21:30 UTCJul 13, 21:35 UTC5m
2026-07-13 SKW5675 - Jul 13, 21:00 UTCJul 13, 21:35 UTC35m
2026-07-13 SKW5675 SBN → ORD Jul 13, 21:08 UTCJul 13, 21:15 UTC7m
2026-07-13 SKW376K - Jul 13, 19:45 UTCJul 13, 20:05 UTC20m
2026-07-13 SKW376K ORD → SBN Jul 13, 19:55 UTCJul 13, 20:00 UTC5m
2026-07-13 SKW5320 - Jul 13, 17:35 UTCJul 13, 18:10 UTC35m
2026-07-13 SKW5320 GRB → ORD Jul 13, 17:47 UTCJul 13, 17:57 UTC10m
2026-07-13 SKW5839 - Jul 13, 16:00 UTCJul 13, 16:35 UTC35m
2026-07-13 SKW5839 ORD → GRB Jul 13, 16:08 UTCJul 13, 16:36 UTC28m
2026-07-13 SKW4676 - Jul 13, 13:05 UTCJul 13, 13:40 UTC35m
2026-07-13 SKW5317 - Jul 13, 03:01 UTCJul 13, 03:30 UTC30m
2026-07-12 SKW5916 - Jul 12, 23:20 UTCJul 13, 00:40 UTC1h 20m
2026-07-12 SKW5930 - Jul 12, 19:20 UTCJul 12, 20:50 UTC1h 30m
2026-07-12 SKW5526 - Jul 12, 15:15 UTCJul 12, 16:35 UTC1h 20m
2026-07-12 SKW5375 - Jul 12, 12:55 UTCJul 12, 14:10 UTC1h 15m
2026-07-12 SKW5124 - Jul 12, 10:15 UTCJul 12, 11:01 UTC45m
2026-07-12 SKW5124 - Jul 12, 03:25 UTCJul 12, 04:05 UTC40m
2026-07-12 SKW4681 GRB → ORD Jul 12, 00:04 UTCJul 12, 00:21 UTC17m
2026-07-11 SKW4681 - Jul 11, 23:55 UTCJul 12, 00:30 UTC35m
2026-07-11 SKW5907 - Jul 11, 20:55 UTCJul 11, 21:30 UTC35m
2026-07-11 SKW5320 - Jul 11, 17:40 UTCJul 11, 18:20 UTC40m
2026-07-11 SKW5320 GRB → ORD Jul 11, 17:47 UTCJul 11, 18:08 UTC21m
2026-07-11 SKW5839 - Jul 11, 16:20 UTCJul 11, 16:55 UTC35m
2026-07-11 SKW5839 ORD → GRB Jul 11, 16:08 UTCJul 11, 16:56 UTC48m
2026-07-11 SKW4676 - Jul 11, 13:10 UTCJul 11, 14:30 UTC1h 20m
2026-07-11 SKW5317 - Jul 11, 02:50 UTCJul 11, 03:30 UTC40m
2026-07-11 SKW5082 - Jul 11, 00:30 UTCJul 11, 01:30 UTC1h 0m
2026-07-10 SKW489J - Jul 10, 22:40 UTCJul 10, 23:20 UTC40m
2026-07-10 SKW489J ORD → CMX Jul 10, 22:25 UTCJul 10, 23:35 UTC1h 10m
2026-07-10 SKW5568 - Jul 10, 18:55 UTCJul 10, 20:45 UTC1h 50m
2026-07-10 SKW5568 MDT → ORD Jul 10, 18:32 UTCJul 10, 20:47 UTC2h 15m
2026-07-10 SKW4798 ORD → CHA Jul 10, 15:40 UTCJul 10, 17:10 UTC1h 30m
2026-07-10 SKW5910 LNK → ORD Jul 10, 12:45 UTCJul 10, 14:10 UTC1h 25m
2026-07-10 SKW5910 LNK → ORD Jul 10, 12:50 UTCJul 10, 13:53 UTC1h 3m
2026-07-10 SKW5314 - Jul 10, 03:55 UTCJul 10, 05:20 UTC1h 25m
2026-07-09 SKW5916 - Jul 9, 23:00 UTCJul 10, 00:25 UTC1h 25m
2026-07-09 SKW5916 FAR → ORD Jul 9, 23:03 UTCJul 10, 00:09 UTC1h 6m
2026-07-09 SKW5930 - Jul 9, 20:20 UTCJul 9, 21:40 UTC1h 20m
2026-07-09 SKW5930 ORD → FAR Jul 9, 20:15 UTCJul 9, 21:41 UTC1h 26m
2026-07-09 SKW5526 - Jul 9, 15:20 UTCJul 9, 16:25 UTC1h 5m
2026-07-09 SKW5526 CRW → ORD Jul 9, 15:13 UTCJul 9, 16:12 UTC59m
2026-07-09 SKW5375 - Jul 9, 13:00 UTCJul 9, 14:05 UTC1h 5m
2026-07-09 SKW5121 - Jul 9, 10:15 UTCJul 9, 11:10 UTC55m
2026-07-09 SKW5124 - Jul 9, 06:35 UTCJul 9, 07:20 UTC45m
2026-07-09 SKW5135 MCW → ORD Jul 9, 04:25 UTCJul 9, 05:15 UTC50m
2026-07-09 SKW6079 ORD → MCW Jul 9, 02:45 UTCJul 9, 03:40 UTC55m
2026-07-08 SKW6079 - Jul 8, 22:25 UTCJul 9, 01:10 UTC2h 45m
2026-07-08 SKW5034 - Jul 8, 18:50 UTCJul 8, 20:20 UTC1h 30m
2026-07-08 SKW5075 ORD → LNS Jul 8, 16:35 UTCJul 8, 18:05 UTC1h 30m

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 5h ago.
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, SKW382H, SKW5053, SKW5320.