Apparatus

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sensors Mode-S transponder

A4DBE3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N412DK · PIPER PA-28-140/150/160/180 · operated by CHRISTIANSEN AVIATION LLC

Hex
A4DBE3
Octal
51155743
Decimal
10,804,195
Country
US
Tail
N412DK
Type
P28A
No current signal · last broadcast 1d ago
Flights observed
209
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A4DBE3.

Country allocation

The ICAO 24-bit address A4DBE3 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
N412DK - 209 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N412DK - Jul 16, 21:50 UTCJul 16, 22:40 UTC50m
2026-07-16 N412DK - Jul 16, 18:05 UTCJul 16, 19:35 UTC1h 30m
2026-07-15 N412DK MYF → MYF Jul 15, 23:15 UTCJul 16, 00:20 UTC1h 5m
2026-07-15 N412DK MYF → MYF Jul 15, 20:55 UTCJul 15, 22:10 UTC1h 15m
2026-07-15 N412DK - Jul 15, 17:55 UTCJul 15, 19:20 UTC1h 25m
2026-07-14 N412DK MYF → MYF Jul 14, 20:50 UTCJul 14, 21:40 UTC50m
2026-07-14 N412DK - Jul 14, 18:05 UTCJul 14, 19:40 UTC1h 35m
2026-07-13 N412DK - Jul 13, 22:45 UTCJul 13, 23:55 UTC1h 10m
2026-07-13 N412DK MYF → MYF Jul 13, 20:15 UTCJul 13, 21:20 UTC1h 5m
2026-07-12 N412DK MYF → MYF Jul 12, 23:20 UTCJul 13, 00:45 UTC1h 25m
2026-07-12 N412DK RAL → MYF Jul 12, 20:50 UTCJul 12, 21:55 UTC1h 5m
2026-07-12 N412DK - Jul 12, 19:30 UTCJul 12, 20:30 UTC1h 0m
2026-07-12 N412DK - Jul 12, 15:40 UTCJul 12, 17:10 UTC1h 30m
2026-07-12 N412DK MYF → MYF Jul 12, 03:45 UTCJul 12, 05:25 UTC1h 40m
2026-07-11 N412DK MYF → MYF Jul 11, 23:20 UTCJul 12, 01:05 UTC1h 45m
2026-07-11 N412DK - Jul 11, 20:20 UTCJul 11, 21:25 UTC1h 5m
2026-07-11 N412DK - Jul 11, 18:00 UTCJul 11, 18:30 UTC30m
2026-07-11 N412DK - Jul 11, 03:50 UTCJul 11, 06:15 UTC2h 25m
2026-07-11 N412DK MYF → SBP Jul 11, 00:40 UTCJul 11, 02:55 UTC2h 15m
2026-07-10 N412DK MYF → MYF Jul 10, 20:15 UTCJul 10, 21:45 UTC1h 30m
2026-07-10 N412DK MYF → MYF Jul 10, 17:45 UTCJul 10, 19:10 UTC1h 25m
2026-07-10 N412DK MYF → MYF Jul 10, 01:40 UTCJul 10, 02:55 UTC1h 15m
2026-07-09 N412DK - Jul 9, 20:55 UTCJul 9, 22:10 UTC1h 15m
2026-07-09 N412DK MYF → MYF Jul 9, 18:20 UTCJul 9, 20:00 UTC1h 40m
2026-07-09 N412DK - Jul 9, 16:10 UTCJul 9, 17:35 UTC1h 25m
2026-07-09 N412DK MYF → MYF Jul 9, 00:45 UTCJul 9, 03:15 UTC2h 30m
2026-07-08 N412DK - Jul 8, 20:30 UTCJul 8, 21:05 UTC35m
2026-07-08 N412DK MYF → HMT Jul 8, 19:40 UTCJul 8, 20:20 UTC40m
2026-07-08 N412DK - Jul 8, 18:35 UTCJul 8, 18:55 UTC20m
2026-07-07 N412DK MYF → MYF Jul 7, 22:10 UTCJul 7, 22:50 UTC40m
2026-07-07 N412DK NKX → MYF Jul 7, 17:10 UTCJul 7, 18:25 UTC1h 15m
2026-07-06 N412DK MYF → MYF Jul 6, 22:35 UTCJul 6, 23:20 UTC45m
2026-07-06 N412DK MYF → MYF Jul 6, 19:45 UTCJul 6, 21:00 UTC1h 15m
2026-07-06 N412DK - Jul 6, 17:25 UTCJul 6, 18:40 UTC1h 15m
2026-07-04 N412DK MYF → MYF Jul 4, 03:40 UTCJul 4, 04:20 UTC40m
2026-07-03 N412DK - Jul 3, 23:10 UTCJul 4, 00:55 UTC1h 45m
2026-07-03 N412DK MYF → MYF Jul 3, 21:40 UTCJul 3, 22:10 UTC30m
2026-07-03 N412DK - Jul 3, 20:55 UTCJul 3, 21:30 UTC35m
2026-07-03 N412DK - Jul 3, 18:20 UTCJul 3, 19:35 UTC1h 15m
2026-07-03 N412DK MYF → MYF Jul 3, 00:50 UTCJul 3, 01:35 UTC45m
2026-07-02 N412DK - Jul 2, 23:00 UTCJul 2, 23:15 UTC15m
2026-07-02 N412DK - Jul 2, 21:45 UTCJul 2, 22:45 UTC1h 0m
2026-07-02 N412DK MYF → MYF Jul 2, 19:20 UTCJul 2, 20:05 UTC45m
2026-07-02 N412DK - Jul 2, 17:20 UTCJul 2, 18:10 UTC50m
2026-07-02 N412DK - Jul 2, 03:45 UTCJul 2, 05:55 UTC2h 10m
2026-07-02 N412DK - Jul 2, 00:20 UTCJul 2, 01:45 UTC1h 25m
2026-07-01 N412DK - Jul 1, 21:35 UTCJul 1, 22:55 UTC1h 20m
2026-07-01 N412DK - Jul 1, 19:10 UTCJul 1, 20:40 UTC1h 30m
2026-06-30 N412DK MYF → MYF Jun 30, 23:10 UTCJun 30, 23:30 UTC20m
2026-06-30 N412DK MYF → MYF Jun 30, 22:10 UTCJun 30, 23:05 UTC55m

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 N412DK page for operator, model, and routing details .

Mode-S A4DBE3 frequently asked

What is Mode-S code A4DBE3?
A4DBE3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N412DK.
Where is Mode-S A4DBE3 registered?
Mode-S code A4DBE3 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 A4DBE3 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4DBE3, octal 51155743, decimal 10,804,195.
What flights does A4DBE3 operate?
Mode-S A4DBE3 has broadcast 1 distinct callsign, including N412DK.