Apparatus

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sensors Mode-S transponder

A1A7DE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N20565 · CESSNA 172 Skyhawk · operated by WATERS AERO MARINE INC

Hex
A1A7DE
Octal
50323736
Decimal
10,594,270
Country
US
Tail
N20565
Type
C172
No current signal · last broadcast 13h ago
Flights observed
97
Distinct callsigns
1
Country
US
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S A1A7DE.

Country allocation

The ICAO 24-bit address A1A7DE 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
N20565 - 97 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N20565 - Jul 13, 19:15 UTCJul 13, 20:00 UTC45m
2026-07-13 N20565 RKD → RKD Jul 13, 17:25 UTCJul 13, 18:10 UTC45m
2026-07-13 N20565 RKD → RKD Jul 13, 15:40 UTCJul 13, 16:35 UTC55m
2026-07-13 N20565 RKD → RKD Jul 13, 13:25 UTCJul 13, 14:45 UTC1h 20m
2026-07-13 N20565 RKD → RKD Jul 13, 11:45 UTCJul 13, 12:35 UTC50m
2026-07-12 N20565 RKD → RKD Jul 12, 21:20 UTCJul 12, 22:10 UTC50m
2026-07-11 N20565 RKD → RKD Jul 11, 20:50 UTCJul 11, 21:50 UTC1h 0m
2026-07-07 N20565 RKD → RKD Jul 7, 00:10 UTCJul 7, 01:20 UTC1h 10m
2026-07-06 N20565 - Jul 6, 22:35 UTCJul 6, 23:20 UTC45m
2026-07-06 N20565 - Jul 6, 20:05 UTCJul 6, 20:40 UTC35m
2026-07-06 N20565 - Jul 6, 18:05 UTCJul 6, 19:00 UTC55m
2026-07-06 N20565 - Jul 6, 15:45 UTCJul 6, 16:35 UTC50m
2026-07-06 N20565 - Jul 6, 13:15 UTCJul 6, 14:25 UTC1h 10m
2026-07-06 N20565 - Jul 6, 11:30 UTCJul 6, 12:20 UTC50m
2026-07-05 N20565 - Jul 5, 17:50 UTCJul 5, 19:05 UTC1h 15m
2026-07-05 N20565 - Jul 5, 16:20 UTCJul 5, 17:15 UTC55m
2026-07-05 N20565 RKD → RKD Jul 5, 13:15 UTCJul 5, 14:10 UTC55m
2026-07-02 N20565 RKD → RKD Jul 2, 20:00 UTCJul 2, 20:15 UTC15m
2026-07-02 N20565 - Jul 2, 13:35 UTCJul 2, 13:45 UTC10m
2026-07-02 N20565 - Jul 2, 11:55 UTCJul 2, 12:20 UTC25m
2026-06-30 N20565 RKD → RKD Jun 30, 22:25 UTCJun 30, 23:10 UTC45m
2026-06-30 N20565 MLT → RKD Jun 30, 19:55 UTCJun 30, 21:00 UTC1h 5m
2026-06-30 N20565 - Jun 30, 16:30 UTCJun 30, 17:30 UTC1h 0m
2026-06-30 N20565 - Jun 30, 14:05 UTCJun 30, 14:25 UTC20m
2026-06-30 N20565 - Jun 30, 12:40 UTCJun 30, 13:35 UTC55m
2026-06-29 N20565 NHZ → RKD Jun 29, 22:24 UTCJun 29, 23:09 UTC45m
2026-06-29 N20565 - Jun 29, 21:09 UTCJun 29, 21:19 UTC10m
2026-06-28 N20565 RKD → RKD Jun 28, 21:14 UTCJun 28, 22:29 UTC1h 15m
2026-06-28 N20565 RKD → RKD Jun 28, 19:40 UTCJun 28, 20:29 UTC50m
2026-06-28 N20565 RKD → RKD Jun 28, 17:34 UTCJun 28, 18:34 UTC1h 0m
2026-06-28 N20565 - Jun 28, 15:29 UTCJun 28, 16:14 UTC45m
2026-06-14 N20565 RKD → RKD Jun 14, 15:00 UTCJun 14, 15:10 UTC10m
2026-06-13 N20565 RKD → RKD Jun 13, 19:15 UTCJun 13, 20:20 UTC1h 5m
2026-06-11 N20565 - Jun 11, 20:35 UTCJun 11, 21:05 UTC30m
2026-06-11 N20565 RKD → RKD Jun 11, 18:40 UTCJun 11, 19:35 UTC55m
2026-06-05 N20565 - Jun 5, 03:40 UTCJun 5, 03:50 UTC10m
2026-06-04 N20565 - Jun 4, 21:30 UTCJun 4, 21:40 UTC10m
2026-06-04 N20565 - Jun 4, 20:00 UTCJun 4, 20:10 UTC10m
2026-06-04 N20565 - Jun 4, 18:35 UTCJun 4, 18:55 UTC20m
2026-06-04 N20565 - Jun 4, 16:20 UTCJun 4, 17:15 UTC55m
2026-06-04 N20565 - Jun 4, 13:55 UTCJun 4, 14:40 UTC45m
2026-06-04 N20565 RKD → RKD Jun 4, 11:50 UTCJun 4, 12:40 UTC50m
2026-06-04 N20565 RKD → RKD Jun 4, 01:20 UTCJun 4, 01:30 UTC10m
2026-06-03 N20565 - Jun 3, 19:55 UTCJun 3, 20:10 UTC15m
2026-06-03 N20565 - Jun 3, 18:35 UTCJun 3, 18:50 UTC15m
2026-06-03 N20565 RKD → RKD Jun 3, 16:10 UTCJun 3, 16:55 UTC45m
2026-06-03 N20565 RKD → RKD Jun 3, 14:30 UTCJun 3, 15:20 UTC50m
2026-06-02 N20565 RKD → RKD Jun 2, 19:10 UTCJun 2, 20:15 UTC1h 5m
2026-06-02 N20565 RKD → RKD Jun 2, 17:40 UTCJun 2, 18:25 UTC45m
2026-06-01 N20565 - Jun 1, 19:45 UTCJun 1, 19:55 UTC10m

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 N20565 page for operator, model, and routing details .

Mode-S A1A7DE frequently asked

What is Mode-S code A1A7DE?
A1A7DE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N20565.
Where is Mode-S A1A7DE registered?
Mode-S code A1A7DE 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 A1A7DE broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1A7DE, octal 50323736, decimal 10,594,270.
What flights does A1A7DE operate?
Mode-S A1A7DE has broadcast 1 distinct callsign, including N20565.