Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACE9D8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N931EV · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
ACE9D8
Octal
53164730
Decimal
11,332,056
Country
US
Tail
N931EV
Type
CRJ2
No current signal · last broadcast Jul 26, 20:30 UTC
Flights observed
571
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S ACE9D8.

Country allocation

The ICAO 24-bit address ACE9D8 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
SKW5103 - 7 2026-06-24
SKW4794 - 7 2026-07-11
SKW6022 - 6 2026-07-10
SKW5584 SkyWest Airlines 6 2026-05-14
SKW5043 - 6 2026-07-19
SKW5016 - 6 2026-07-24
SKW5015 SkyWest Airlines 6 2026-07-25
SKW5733 - 5 2026-07-10
SKW5402 - 5 2026-07-05
SKW5274 SkyWest Airlines 5 2026-07-08
SKW5020 SkyWest Airlines 5 2026-07-26
SKW4725 SkyWest Airlines 5 2026-05-24
SKW4633 - 5 2026-07-06
SKW792R SkyWest Airlines 4 2026-06-14
SKW5801 - 4 2026-06-12
SKW5710 SkyWest Airlines 4 2026-06-18
SKW5400 SkyWest Airlines 4 2026-06-06
SKW5376 SkyWest Airlines 4 2026-05-20
SKW5308 SkyWest Airlines 4 2026-06-06
SKW5285 - 4 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6077 DVL → DEN Jul 26, 19:35 UTCJul 26, 20:30 UTC55m
2026-07-26 SKW411Y ORD → CIU Jul 26, 17:25 UTCJul 26, 18:10 UTC45m
2026-07-26 SKW5020 DEC → ORD Jul 26, 13:55 UTCJul 26, 15:20 UTC1h 25m
2026-07-25 SKW5015 BFF → DEN Jul 25, 16:40 UTCJul 25, 17:55 UTC1h 15m
2026-07-25 SKW5910 LNK → ORD Jul 25, 12:55 UTCJul 25, 14:15 UTC1h 20m
2026-07-25 SKW5314 XNA → ORD Jul 25, 01:25 UTCJul 25, 02:40 UTC1h 15m
2026-07-24 SKW4644 CLT → DEN Jul 24, 22:35 UTCJul 24, 23:45 UTC1h 10m
2026-07-24 SKW5566 LAX → ACV Jul 24, 20:00 UTCJul 24, 21:05 UTC1h 5m
2026-07-24 SKW5566 LAX → ACV Jul 24, 19:58 UTCJul 24, 20:55 UTC57m
2026-07-24 SKW5016 - Jul 24, 13:45 UTCJul 24, 14:30 UTC45m
2026-07-24 SKW404X ORD → CMX Jul 24, 03:30 UTCJul 24, 04:10 UTC40m
2026-07-24 SKW5135 MCW → ORD Jul 24, 00:30 UTCJul 24, 01:30 UTC1h 0m
2026-07-23 SKW6079 IAH → PAH Jul 23, 22:35 UTCJul 23, 23:30 UTC55m
2026-07-23 SKW6073 PIR → DEN Jul 23, 18:45 UTCJul 23, 20:00 UTC1h 15m
2026-07-23 SKW6071 ORD → FOD Jul 23, 17:25 UTCJul 23, 17:45 UTC20m
2026-07-23 SKW6070 LBF → DEN Jul 23, 14:35 UTCJul 23, 15:05 UTC30m
2026-07-22 SKW6074 ORD → LAF Jul 22, 22:00 UTCJul 22, 22:55 UTC55m
2026-07-22 SKW5352 - Jul 22, 19:35 UTCJul 22, 20:00 UTC25m
2026-07-22 SKW5352 SBN → ORD Jul 22, 19:47 UTCJul 22, 19:59 UTC12m
2026-07-22 SKW5285 - Jul 22, 16:35 UTCJul 22, 16:55 UTC20m
2026-07-22 SKW467O - Jul 22, 14:15 UTCJul 22, 15:30 UTC1h 15m
2026-07-22 SKW430X - Jul 22, 12:10 UTCJul 22, 13:10 UTC1h 0m
2026-07-21 SKW5432 DEN → SJC Jul 21, 15:55 UTCJul 21, 17:15 UTC1h 20m
2026-07-21 SKW5194 ORD → BJX Jul 21, 13:55 UTCJul 21, 15:10 UTC1h 15m
2026-07-21 SKW5107 JST → ORD Jul 21, 01:20 UTCJul 21, 01:50 UTC30m
2026-07-20 SKW5039 - Jul 20, 23:50 UTCJul 21, 00:10 UTC20m
2026-07-20 SKW6065 - Jul 20, 22:05 UTCJul 20, 22:45 UTC40m
2026-07-20 SKW6065 - Jul 20, 20:15 UTCJul 20, 20:55 UTC40m
2026-07-20 SKW5114 DEN → LBL Jul 20, 16:40 UTCJul 20, 17:45 UTC1h 5m
2026-07-20 SKW483R DEN → SUX Jul 20, 14:25 UTCJul 20, 15:25 UTC1h 0m
2026-07-20 SKW5093 DEN → DEN Jul 20, 03:30 UTCJul 20, 12:00 UTC8h 30m
2026-07-20 SKW5057 - Jul 20, 00:10 UTCJul 20, 01:25 UTC1h 15m
2026-07-19 SKW768J DEN → LBF Jul 19, 22:00 UTCJul 19, 23:05 UTC1h 5m
2026-07-19 SKW768J DEN → LBF Jul 19, 22:03 UTCJul 19, 23:05 UTC1h 2m
2026-07-19 SKW422W ORD → DEC Jul 19, 19:00 UTCJul 19, 20:30 UTC1h 30m
2026-07-19 SKW5015 ORD → JLN Jul 19, 16:55 UTCJul 19, 18:05 UTC1h 10m
2026-07-19 SKW5015 ORD → JLN Jul 19, 17:03 UTCJul 19, 18:02 UTC59m
2026-07-19 SKW5036 - Jul 19, 14:55 UTCJul 19, 15:45 UTC50m
2026-07-19 SKW486F - Jul 19, 13:05 UTCJul 19, 13:55 UTC50m
2026-07-19 SKW5043 LAF → ORD Jul 19, 10:45 UTCJul 19, 11:25 UTC40m
2026-07-18 SKW5070 ORD → LAF Jul 18, 18:40 UTCJul 18, 19:05 UTC25m
2026-07-18 SKW6058 - Jul 18, 15:15 UTCJul 18, 16:10 UTC55m
2026-07-17 SKW364V - Jul 17, 23:14 UTCJul 17, 23:50 UTC35m
2026-07-17 SKW4747 - Jul 17, 20:40 UTCJul 17, 21:44 UTC1h 5m
2026-07-17 SKW4747 DAY → ORD Jul 17, 20:29 UTCJul 17, 21:28 UTC59m
2026-07-17 SKW727R - Jul 17, 17:09 UTCJul 17, 18:00 UTC50m
2026-07-17 SKW5027 - Jul 17, 14:39 UTCJul 17, 15:15 UTC35m
2026-07-17 SKW598C - Jul 17, 13:10 UTCJul 17, 13:45 UTC35m
2026-07-17 SKW598C ORD → DEC Jul 17, 13:14 UTCJul 17, 13:37 UTC23m
2026-07-17 SKW4714 - Jul 17, 10:40 UTCJul 17, 11:20 UTC40m

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 N931EV page for operator, model, and routing details .

Mode-S ACE9D8 frequently asked

What is Mode-S code ACE9D8?
ACE9D8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N931EV.
Where is Mode-S ACE9D8 registered?
Mode-S code ACE9D8 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 ACE9D8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACE9D8, octal 53164730, decimal 11,332,056.
What flights does ACE9D8 operate?
Mode-S ACE9D8 has broadcast 20 distinct callsigns, including SKW5103, SKW4794, SKW6022, SKW5584, SKW5043.