Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACE621

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N930EV · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
ACE621
Octal
53163041
Decimal
11,331,105
Country
US
Tail
N930EV
Type
CRJ2
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
303
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S ACE621.

Country allocation

The ICAO 24-bit address ACE621 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
SKW5081 - 7 2026-07-08
SKW5082 - 6 2026-06-30
SKW5017 - 6 2026-07-14
SKW465C - 6 2026-07-14
SKW5019 SkyWest Airlines 5 2026-07-24
SKW6074 - 4 2026-06-25
SKW5755 - 4 2026-07-20
SKW5634 SkyWest Airlines 4 2026-07-24
SKW5109 SkyWest Airlines 4 2026-07-25
SKW5067 - 4 2026-07-10
SKW5025 - 4 2026-07-11
SKW4770 SkyWest Airlines 4 2026-07-19
SKW4674 SkyWest Airlines 4 2026-07-24
SKW6058 SkyWest Airlines 3 2026-04-23
SKW5831 SkyWest Airlines 3 2026-07-23
SKW5742 SkyWest Airlines 3 2026-07-24
SKW5488 - 3 2026-04-13
SKW5436 - 3 2026-07-11
SKW527Y SkyWest Airlines 3 2026-07-23
SKW5246 SkyWest Airlines 3 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW321C DEN → DVL Jul 26, 20:55 UTCJul 26, 22:15 UTC1h 20m
2026-07-26 SKW5708 ORD → PWM Jul 26, 18:25 UTCJul 26, 19:00 UTC35m
2026-07-26 SKW5708 ORD → PWM Jul 26, 18:22 UTCJul 26, 18:56 UTC34m
2026-07-26 SKW413Y DEN → RAP Jul 26, 14:20 UTCJul 26, 14:50 UTC30m
2026-07-26 SKW5061 EWR → IAH Jul 26, 11:30 UTCJul 26, 12:05 UTC35m
2026-07-26 SKW562V DEN → SLC Jul 26, 03:10 UTCJul 26, 03:35 UTC25m
2026-07-26 SKW562V DEN → SLC Jul 26, 02:56 UTCJul 26, 03:46 UTC50m
2026-07-25 SKW5109 ORD → EAU Jul 25, 11:30 UTCJul 25, 12:30 UTC1h 0m
2026-07-25 SKW393X DEN → EAR Jul 25, 02:45 UTCJul 25, 03:30 UTC45m
2026-07-24 SKW5098 DIK → DEN Jul 24, 22:10 UTCJul 25, 01:45 UTC3h 35m
2026-07-24 SKW5742 ASE → ORD Jul 24, 19:05 UTCJul 24, 19:40 UTC35m
2026-07-24 SKW4674 GEG → SFO Jul 24, 17:05 UTCJul 24, 17:35 UTC30m
2026-07-24 SKW5634 MDT → ORD Jul 24, 15:40 UTCJul 24, 16:00 UTC20m
2026-07-24 SKW5246 RDD → SFO Jul 24, 14:00 UTCJul 24, 14:15 UTC15m
2026-07-24 SKW5246 RDD → SFO Jul 24, 14:04 UTCJul 24, 14:17 UTC13m
2026-07-24 SKW5104 DEN → SUX Jul 24, 11:25 UTCJul 24, 12:25 UTC1h 0m
2026-07-24 SKW5062 FOD → ORD Jul 24, 07:00 UTCJul 24, 08:00 UTC1h 0m
2026-07-24 SKW5019 PIB → IAH Jul 24, 04:55 UTCJul 24, 05:20 UTC25m
2026-07-24 SKW5019 PIB → IAH Jul 24, 03:24 UTCJul 24, 05:12 UTC1h 48m
2026-07-24 SKW5019 PIB → IAH Jul 24, 00:55 UTCJul 24, 02:55 UTC2h 0m
2026-07-23 SKW527Y DEN → ATY Jul 23, 20:45 UTCJul 23, 21:50 UTC1h 5m
2026-07-23 SKW5649 SFO → ONT Jul 23, 18:20 UTCJul 23, 19:30 UTC1h 10m
2026-07-23 SKW5831 SFO → JAC Jul 23, 16:25 UTCJul 23, 17:25 UTC1h 0m
2026-07-23 SKW5831 SFO → JAC Jul 23, 16:11 UTCJul 23, 17:27 UTC1h 16m
2026-07-23 SKW4677 CVG → ORD Jul 23, 14:00 UTCJul 23, 14:25 UTC25m
2026-07-23 SKW741Y DEN → COS Jul 23, 06:00 UTCJul 23, 06:20 UTC20m
2026-07-22 SKW5037 ORD → DEC Jul 22, 16:29 UTCJul 22, 18:02 UTC1h 33m
2026-07-22 SKW382H DEN → SLN Jul 22, 02:45 UTCJul 22, 18:00 UTC15h 15m
2026-07-22 SKW5078 LBL → DEN Jul 22, 00:25 UTCJul 22, 00:55 UTC30m
2026-07-21 SKW577P DEN → JMS Jul 21, 23:00 UTCJul 21, 23:20 UTC20m
2026-07-21 SKW4800 - Jul 21, 12:10 UTCJul 21, 12:40 UTC30m
2026-07-21 SKW5240 - Jul 21, 03:15 UTCJul 21, 03:30 UTC15m
2026-07-21 SKW5240 DEN → GJT Jul 21, 03:13 UTCJul 21, 03:51 UTC38m
2026-07-20 SKW5019 PIB → IAH Jul 20, 23:30 UTCJul 21, 00:55 UTC1h 24m
2026-07-20 SKW527Y DEN → ATY Jul 20, 20:30 UTCJul 20, 21:30 UTC1h 0m
2026-07-20 SKW5463 RNO → SFO Jul 20, 17:10 UTCJul 20, 18:25 UTC1h 15m
2026-07-20 SKW5463 RNO → SFO Jul 20, 16:57 UTCJul 20, 18:20 UTC1h 23m
2026-07-20 SKW4762 - Jul 20, 14:35 UTCJul 20, 15:55 UTC1h 20m
2026-07-20 SKW5109 - Jul 20, 11:25 UTCJul 20, 12:20 UTC55m
2026-07-20 SKW393X DEN → EAR Jul 20, 03:20 UTCJul 20, 04:00 UTC40m
2026-07-20 SKW5755 - Jul 20, 01:35 UTCJul 20, 02:00 UTC25m
2026-07-19 SKW4770 DEN → GJT Jul 19, 23:30 UTCJul 19, 23:55 UTC25m
2026-07-19 SKW4770 DEN → GJT Jul 19, 23:15 UTCJul 20, 00:11 UTC56m
2026-07-19 SKW5120 EAR → DEN Jul 19, 18:50 UTCJul 19, 22:10 UTC3h 20m
2026-07-19 SKW5096 DIK → DEN Jul 19, 14:55 UTCJul 19, 16:00 UTC1h 5m
2026-07-18 SKW5096 DIK → DEN Jul 18, 22:50 UTCJul 19, 16:00 UTC17h 10m
2026-07-18 SKW5033 EAU → ORD Jul 18, 20:55 UTCJul 18, 21:35 UTC40m
2026-07-18 SKW5033 EAU → ORD Jul 18, 20:57 UTCJul 18, 21:30 UTC33m
2026-07-18 SKW5046 JST → IAD Jul 18, 18:35 UTCJul 18, 19:01 UTC26m
2026-07-18 SKW5046 - Jul 18, 18:20 UTCJul 18, 18:55 UTC35m

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 N930EV page for operator, model, and routing details .

Mode-S ACE621 frequently asked

What is Mode-S code ACE621?
ACE621 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N930EV.
Where is Mode-S ACE621 registered?
Mode-S code ACE621 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 ACE621 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACE621, octal 53163041, decimal 11,331,105.
What flights does ACE621 operate?
Mode-S ACE621 has broadcast 20 distinct callsigns, including SKW5081, SKW5082, SKW5017, SKW465C, SKW5019.