Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACE39F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N93DD · BELL 407 · operated by HELICOPTERS INC

Hex
ACE39F
Octal
53161637
Decimal
11,330,463
Country
US
Tail
N93DD
Type
B407
No current signal · last broadcast Jul 21, 00:50 UTC
Flights observed
76
Distinct callsigns
1
Country
US
Last broadcast
Jul 21, 00:50 UTC

Last known position

Most recent position reported by Mode-S ACE39F.

Country allocation

The ICAO 24-bit address ACE39F 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 1 distinct

Callsign Airline Flights Last seen
N93DD - 76 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 N93DD - Jul 21, 00:35 UTCJul 21, 00:50 UTC15m
2026-07-11 N93DD - Jul 11, 02:20 UTCJul 11, 03:30 UTC1h 10m
2026-07-11 N93DD - Jul 11, 00:30 UTCJul 11, 01:05 UTC35m
2026-07-10 N93DD - Jul 10, 20:40 UTCJul 10, 21:05 UTC25m
2026-07-10 N93DD - Jul 10, 18:20 UTCJul 10, 19:10 UTC50m
2026-07-10 N93DD - Jul 10, 15:30 UTCJul 10, 16:45 UTC1h 15m
2026-07-10 N93DD VNY → VNY Jul 10, 00:10 UTCJul 10, 00:30 UTC20m
2026-07-09 N93DD VNY → VNY Jul 9, 21:30 UTCJul 9, 23:05 UTC1h 35m
2026-07-09 N93DD VNY → VNY Jul 9, 20:40 UTCJul 9, 20:55 UTC15m
2026-07-09 N93DD VNY → VNY Jul 9, 04:00 UTCJul 9, 04:35 UTC35m
2026-07-08 N93DD VNY → VNY Jul 8, 23:45 UTCJul 9, 00:20 UTC35m
2026-07-08 N93DD VNY → VNY Jul 8, 21:35 UTCJul 8, 23:05 UTC1h 30m
2026-07-08 N93DD - Jul 8, 04:10 UTCJul 8, 04:35 UTC25m
2026-07-07 N93DD - Jul 7, 19:55 UTCJul 8, 01:35 UTC5h 40m
2026-07-07 N93DD VNY → LGB Jul 7, 17:00 UTCJul 7, 19:15 UTC2h 15m
2026-07-07 N93DD - Jul 7, 12:55 UTCJul 7, 15:25 UTC2h 30m
2026-07-07 N93DD - Jul 7, 06:05 UTCJul 7, 06:30 UTC25m
2026-07-07 N93DD - Jul 7, 04:20 UTCJul 7, 04:55 UTC35m
2026-07-06 N93DD - Jul 6, 23:10 UTCJul 7, 01:20 UTC2h 10m
2026-07-06 N93DD - Jul 6, 21:35 UTCJul 6, 22:35 UTC1h 0m
2026-07-02 N93DD VNY → VNY Jul 2, 19:30 UTCJul 2, 21:00 UTC1h 30m
2026-07-02 N93DD - Jul 2, 16:20 UTCJul 2, 18:20 UTC2h 0m
2026-07-01 N93DD - Jul 1, 19:20 UTCJul 1, 20:10 UTC50m
2026-06-25 N93DD - Jun 25, 23:24 UTCJun 26, 01:54 UTC2h 30m
2026-06-25 N93DD - Jun 25, 20:25 UTCJun 25, 22:20 UTC1h 55m
2026-06-25 N93DD - Jun 25, 17:25 UTCJun 25, 19:49 UTC2h 25m
2026-06-25 N93DD - Jun 25, 15:54 UTCJun 25, 16:20 UTC25m
2026-06-25 N93DD VNY → VNY Jun 25, 02:45 UTCJun 25, 06:25 UTC3h 40m
2026-06-24 N93DD - Jun 24, 23:50 UTCJun 25, 00:24 UTC35m
2026-06-24 N93DD - Jun 24, 21:40 UTCJun 24, 23:14 UTC1h 35m
2026-06-24 N93DD - Jun 24, 04:55 UTCJun 24, 05:24 UTC30m
2026-06-24 N93DD - Jun 24, 03:44 UTCJun 24, 04:15 UTC30m
2026-06-24 N93DD VNY → VNY Jun 24, 02:09 UTCJun 24, 02:45 UTC35m
2026-06-23 N93DD - Jun 23, 23:55 UTCJun 24, 00:44 UTC50m
2026-06-23 N93DD VNY → EMT Jun 23, 21:24 UTCJun 23, 23:14 UTC1h 50m
2026-06-23 N93DD - Jun 23, 03:45 UTCJun 23, 06:19 UTC2h 35m
2026-06-23 N93DD VNY → VNY Jun 23, 02:45 UTCJun 23, 03:09 UTC25m
2026-06-22 N93DD - Jun 22, 22:34 UTCJun 23, 01:25 UTC2h 50m
2026-06-22 N93DD VNY → VNY Jun 22, 04:59 UTCJun 22, 06:19 UTC1h 20m
2026-06-22 N93DD - Jun 22, 02:45 UTCJun 22, 04:19 UTC1h 35m
2026-06-21 N93DD - Jun 21, 23:50 UTCJun 22, 01:29 UTC1h 40m
2026-06-21 N93DD VNY → VNY Jun 21, 23:05 UTCJun 21, 23:44 UTC40m
2026-06-21 N93DD - Jun 21, 03:49 UTCJun 21, 06:19 UTC2h 30m
2026-06-21 N93DD - Jun 21, 02:40 UTCJun 21, 03:19 UTC40m
2026-06-20 N93DD - Jun 20, 23:34 UTCJun 21, 01:45 UTC2h 10m
2026-06-19 N93DD - Jun 19, 23:44 UTCJun 20, 00:54 UTC1h 10m
2026-06-19 N93DD - Jun 19, 21:49 UTCJun 19, 23:14 UTC1h 25m
2026-06-19 N93DD - Jun 19, 02:59 UTCJun 19, 06:24 UTC3h 25m
2026-06-18 N93DD - Jun 18, 21:55 UTCJun 19, 01:39 UTC3h 44m
2026-06-18 N93DD - Jun 18, 02:45 UTCJun 18, 05:25 UTC2h 40m

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 N93DD page for operator, model, and routing details .

Mode-S ACE39F frequently asked

What is Mode-S code ACE39F?
ACE39F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N93DD.
Where is Mode-S ACE39F registered?
Mode-S code ACE39F 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 ACE39F broadcasting right now?
No active broadcast right now. Last signal was Jul 21, 00:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACE39F, octal 53161637, decimal 11,330,463.
What flights does ACE39F operate?
Mode-S ACE39F has broadcast 1 distinct callsign, including N93DD.