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sensors Mode-S transponder

A6D5E2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N54DD · CESSNA 560 Citation Ultra · operated by CHRYSLER AVIATION INC

Hex
A6D5E2
Octal
51552742
Decimal
10,933,730
Country
US
Tail
N54DD
Type
C560
No current signal · last broadcast Jul 25, 13:00 UTC
Flights observed
178
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 13:00 UTC

Last known position

Most recent position reported by Mode-S A6D5E2.

Country allocation

The ICAO 24-bit address A6D5E2 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
N54DD - 178 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N54DD - Jul 25, 12:05 UTCJul 25, 12:55 UTC50m
2026-07-25 N54DD - Jul 25, 11:00 UTCJul 25, 11:30 UTC30m
2026-07-25 N54DD - Jul 25, 06:10 UTCJul 25, 06:35 UTC25m
2026-07-25 N54DD VNY → SJC Jul 25, 04:55 UTCJul 25, 05:45 UTC50m
2026-07-23 N54DD SMX → VNY Jul 23, 23:00 UTCJul 23, 23:25 UTC25m
2026-07-23 N54DD - Jul 23, 18:30 UTCJul 23, 22:25 UTC3h 55m
2026-07-23 N54DD - Jul 23, 15:15 UTCJul 23, 17:20 UTC2h 5m
2026-07-23 N54DD - Jul 23, 12:35 UTCJul 23, 14:25 UTC1h 50m
2026-07-22 N54DD - Jul 22, 21:50 UTCJul 23, 00:25 UTC2h 35m
2026-07-22 N54DD - Jul 22, 18:20 UTCJul 22, 21:00 UTC2h 40m
2026-07-22 N54DD - Jul 22, 13:55 UTCJul 22, 14:20 UTC25m
2026-07-22 N54DD VNY → SMX Jul 22, 12:55 UTCJul 22, 13:30 UTC35m
2026-07-21 N54DD - Jul 21, 07:50 UTCJul 21, 10:15 UTC2h 25m
2026-07-21 N54DD - Jul 21, 05:00 UTCJul 21, 07:15 UTC2h 15m
2026-07-20 N54DD - Jul 20, 21:05 UTCJul 20, 21:30 UTC25m
2026-07-20 N54DD HIO → VNY Jul 20, 18:20 UTCJul 20, 20:35 UTC2h 15m
2026-07-20 N54DD VNY → HIO Jul 20, 15:30 UTCJul 20, 17:30 UTC2h 0m
2026-07-20 N54DD - Jul 20, 12:30 UTCJul 20, 13:10 UTC40m
2026-07-20 N54DD VNY → LAS Jul 20, 11:10 UTCJul 20, 11:55 UTC45m
2026-07-19 N54DD - Jul 19, 04:10 UTCJul 19, 06:05 UTC1h 55m
2026-07-18 N54DD - Jul 18, 21:05 UTCJul 18, 21:30 UTC25m
2026-07-18 N54DD VNY → OAK Jul 18, 19:15 UTCJul 18, 20:05 UTC50m
2026-07-17 N54DD SJC → VNY Jul 17, 15:20 UTCJul 17, 16:15 UTC55m
2026-07-17 N54DD - Jul 17, 14:44 UTCJul 17, 15:10 UTC25m
2026-07-17 N54DD - Jul 17, 07:35 UTCJul 17, 08:04 UTC30m
2026-07-17 N54DD - Jul 17, 06:25 UTCJul 17, 07:20 UTC55m
2026-07-17 N54DD - Jul 17, 02:15 UTCJul 17, 04:04 UTC1h 50m
2026-07-16 N54DD - Jul 16, 20:05 UTCJul 16, 20:29 UTC25m
2026-07-16 N54DD VNY → SFO Jul 16, 18:19 UTCJul 16, 19:14 UTC55m
2026-07-15 N54DD - Jul 15, 03:35 UTCJul 15, 04:25 UTC50m
2026-07-15 N54DD - Jul 15, 02:45 UTCJul 15, 03:20 UTC35m
2026-07-14 N54DD - Jul 14, 22:40 UTCJul 14, 23:15 UTC34m
2026-07-14 N54DD VNY → SJC Jul 14, 21:25 UTCJul 14, 22:20 UTC55m
2026-07-12 N54DD VNY → VNY Jul 12, 18:15 UTCJul 12, 19:01 UTC45m
2026-07-11 N54DD - Jul 11, 22:10 UTCJul 12, 00:55 UTC2h 45m
2026-07-11 N54DD VNY → SAN Jul 11, 19:55 UTCJul 11, 20:30 UTC35m
2026-07-10 N54DD - Jul 10, 07:15 UTCJul 10, 09:30 UTC2h 15m
2026-07-10 N54DD - Jul 10, 04:10 UTCJul 10, 06:40 UTC2h 30m
2026-07-10 N54DD VNY → CLD Jul 10, 02:00 UTCJul 10, 02:25 UTC25m
2026-07-09 N54DD MHR → VNY Jul 9, 07:50 UTCJul 9, 08:45 UTC55m
2026-07-09 N54DD VNY → MCC Jul 9, 06:15 UTCJul 9, 07:25 UTC1h 10m
2026-07-08 N54DD OAK → VNY Jul 8, 10:05 UTCJul 8, 11:50 UTC1h 45m
2026-07-08 N54DD VNY → OAK Jul 8, 01:40 UTCJul 8, 03:35 UTC1h 55m
2026-07-07 N54DD - Jul 7, 05:50 UTCJul 7, 06:40 UTC50m
2026-07-07 N54DD VNY → SJC Jul 7, 04:35 UTCJul 7, 05:20 UTC45m
2026-07-06 N54DD - Jul 6, 09:15 UTCJul 6, 10:55 UTC1h 40m
2026-07-06 N54DD - Jul 6, 07:00 UTCJul 6, 08:30 UTC1h 30m
2026-07-06 N54DD - Jul 6, 02:25 UTCJul 6, 03:25 UTC1h 0m
2026-07-06 N54DD VNY → SFO Jul 6, 01:00 UTCJul 6, 02:00 UTC1h 0m
2026-07-05 N54DD OAK → VNY Jul 5, 18:25 UTCJul 5, 19:20 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 N54DD page for operator, model, and routing details .

Mode-S A6D5E2 frequently asked

What is Mode-S code A6D5E2?
A6D5E2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N54DD.
Where is Mode-S A6D5E2 registered?
Mode-S code A6D5E2 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 A6D5E2 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 13:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6D5E2, octal 51552742, decimal 10,933,730.
What flights does A6D5E2 operate?
Mode-S A6D5E2 has broadcast 1 distinct callsign, including N54DD.