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sensors Mode-S transponder

A8D9AE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N67DD · HELIO Courier · operated by DIETZ MICHAEL D

Hex
A8D9AE
Octal
52154656
Decimal
11,065,774
Country
US
Tail
N67DD
Type
COUR
No current signal · last broadcast Jul 25, 02:25 UTC
Flights observed
37
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 02:25 UTC

Last known position

Most recent position reported by Mode-S A8D9AE.

Country allocation

The ICAO 24-bit address A8D9AE 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
N67DD - 37 2026-07-25

Recent flights last 37

DateFlightRouteTakeoffLandingDuration
2026-07-25 N67DD - Jul 25, 02:05 UTCJul 25, 02:25 UTC20m
2026-07-24 N67DD - Jul 24, 20:15 UTCJul 24, 20:25 UTC10m
2026-07-24 N67DD - Jul 24, 03:45 UTCJul 24, 04:55 UTC1h 10m
2026-07-22 N67DD - Jul 22, 01:50 UTCJul 22, 02:00 UTC10m
2026-07-21 N67DD - Jul 21, 03:35 UTCJul 21, 04:30 UTC55m
2026-07-21 N67DD - Jul 21, 01:25 UTCJul 21, 02:15 UTC50m
2026-07-17 N67DD - Jul 17, 22:45 UTCJul 17, 23:35 UTC50m
2026-07-16 N67DD - Jul 16, 17:35 UTCJul 16, 19:20 UTC1h 45m
2026-07-13 N67DD - Jul 13, 22:20 UTCJul 13, 23:15 UTC55m
2026-07-10 N67DD - Jul 10, 15:50 UTCJul 10, 16:40 UTC50m
2026-07-09 N67DD - Jul 9, 22:40 UTCJul 9, 22:55 UTC15m
2026-07-09 N67DD - Jul 9, 21:50 UTCJul 9, 22:00 UTC10m
2026-07-08 N67DD - Jul 8, 19:45 UTCJul 8, 20:40 UTC55m
2026-07-01 N67DD - Jul 1, 22:45 UTCJul 1, 23:40 UTC55m
2026-07-01 N67DD - Jul 1, 22:00 UTCJul 1, 22:10 UTC10m
2026-07-01 N67DD - Jul 1, 18:55 UTCJul 1, 19:50 UTC55m
2026-07-01 N67DD - Jul 1, 00:40 UTCJul 1, 01:35 UTC55m
2026-06-30 N67DD - Jun 30, 02:05 UTCJun 30, 02:55 UTC50m
2026-06-29 N67DD - Jun 29, 00:05 UTCJun 29, 01:05 UTC1h 0m
2026-06-25 N67DD - Jun 25, 22:29 UTCJun 25, 22:45 UTC15m
2026-06-16 N67DD - Jun 16, 16:45 UTCJun 16, 16:55 UTC10m
2026-06-14 N67DD - Jun 14, 23:59 UTCJun 15, 00:10 UTC10m
2026-06-14 N67DD - Jun 14, 20:25 UTCJun 14, 21:00 UTC35m
2026-06-12 N67DD - Jun 12, 17:55 UTCJun 12, 18:05 UTC10m
2026-06-12 N67DD - Jun 12, 03:50 UTCJun 12, 04:05 UTC15m
2026-06-07 N67DD - Jun 7, 23:50 UTCJun 8, 00:00 UTC10m
2026-06-05 N67DD - Jun 5, 11:55 UTCJun 5, 12:10 UTC15m
2026-06-04 N67DD - Jun 4, 03:25 UTCJun 4, 03:35 UTC10m
2026-06-03 N67DD - Jun 3, 02:25 UTCJun 3, 02:40 UTC15m
2026-06-02 N67DD - Jun 2, 21:05 UTCJun 2, 21:15 UTC10m
2026-06-02 N67DD - Jun 2, 02:55 UTCJun 2, 03:05 UTC10m
2026-06-01 N67DD - Jun 1, 20:50 UTCJun 1, 21:00 UTC10m
2026-05-29 N67DD - May 29, 16:15 UTCMay 29, 16:45 UTC30m
2026-05-25 N67DD - May 25, 23:45 UTCMay 26, 00:29 UTC45m
2026-05-22 N67DD - May 22, 03:30 UTCMay 22, 04:20 UTC50m
2026-05-15 N67DD - May 15, 22:00 UTCMay 15, 22:15 UTC15m
2026-05-15 N67DD - May 15, 21:25 UTCMay 15, 21:55 UTC30m

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 N67DD page for operator, model, and routing details .

Mode-S A8D9AE frequently asked

What is Mode-S code A8D9AE?
A8D9AE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N67DD.
Where is Mode-S A8D9AE registered?
Mode-S code A8D9AE 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 A8D9AE broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 02:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8D9AE, octal 52154656, decimal 11,065,774.
What flights does A8D9AE operate?
Mode-S A8D9AE has broadcast 1 distinct callsign, including N67DD.