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sensors Mode-S transponder

A69821

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N524DM · CESSNA 560XL Citation XLS · operated by MAX AIRCRAFT LLC

Hex
A69821
Octal
51514041
Decimal
10,917,921
Country
US
Tail
N524DM
Type
C56X
No current signal · last broadcast 8h ago
Flights observed
152
Distinct callsigns
1
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A69821.

Country allocation

The ICAO 24-bit address A69821 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
RVJ524 - 152 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 RVJ524 - Jul 17, 20:55 UTCJul 17, 21:50 UTC55m
2026-07-16 RVJ524 - Jul 16, 19:05 UTCJul 16, 20:05 UTC1h 0m
2026-07-16 RVJ524 - Jul 16, 16:35 UTCJul 16, 17:45 UTC1h 10m
2026-07-16 RVJ524 - Jul 16, 12:14 UTCJul 16, 12:49 UTC35m
2026-07-16 RVJ524 - Jul 16, 11:20 UTCJul 16, 11:30 UTC10m
2026-07-15 RVJ524 - Jul 15, 19:40 UTCJul 15, 20:45 UTC1h 5m
2026-07-15 RVJ524 - Jul 15, 14:15 UTCJul 15, 14:55 UTC40m
2026-07-15 RVJ524 - Jul 15, 12:35 UTCJul 15, 12:50 UTC15m
2026-07-12 RVJ524 BNA → PIT Jul 12, 19:01 UTCJul 12, 21:00 UTC2h 0m
2026-07-11 RVJ524 - Jul 11, 20:55 UTCJul 11, 21:30 UTC35m
2026-07-10 RVJ524 - Jul 10, 14:20 UTCJul 10, 15:40 UTC1h 20m
2026-07-10 RVJ524 - Jul 10, 12:55 UTCJul 10, 13:15 UTC20m
2026-07-09 RVJ524 - Jul 9, 23:10 UTCJul 10, 00:10 UTC1h 0m
2026-07-09 RVJ524 - Jul 9, 20:45 UTCJul 9, 22:20 UTC1h 35m
2026-07-08 RVJ524 - Jul 8, 13:10 UTCJul 8, 14:35 UTC1h 25m
2026-07-08 RVJ524 - Jul 8, 10:40 UTCJul 8, 11:30 UTC50m
2026-07-07 RVJ524 - Jul 7, 19:40 UTCJul 7, 21:50 UTC2h 10m
2026-07-03 RVJ524 - Jul 3, 17:50 UTCJul 3, 19:30 UTC1h 40m
2026-07-01 RVJ524 - Jul 1, 18:25 UTCJul 1, 19:25 UTC1h 0m
2026-06-28 RVJ524 - Jun 28, 17:04 UTCJun 28, 18:34 UTC1h 30m
2026-06-27 RVJ524 - Jun 27, 14:29 UTCJun 27, 15:39 UTC1h 10m
2026-06-26 RVJ524 - Jun 26, 22:55 UTCJun 27, 00:05 UTC1h 10m
2026-06-25 RVJ524 - Jun 25, 13:09 UTCJun 25, 14:20 UTC1h 10m
2026-06-23 RVJ524 - Jun 23, 19:59 UTCJun 23, 21:29 UTC1h 30m
2026-06-22 RVJ524 - Jun 22, 17:25 UTCJun 22, 18:00 UTC35m
2026-06-22 RVJ524 PIT → TEB Jun 22, 14:34 UTCJun 22, 15:29 UTC55m
2026-06-19 RVJ524 - Jun 19, 22:24 UTCJun 19, 23:19 UTC55m
2026-06-19 RVJ524 BNA → USA Jun 19, 19:19 UTCJun 19, 20:14 UTC55m
2026-06-19 RVJ524 - Jun 19, 01:15 UTCJun 19, 04:14 UTC3h 0m
2026-06-18 RVJ524 - Jun 18, 18:15 UTCJun 18, 19:05 UTC50m
2026-06-17 RVJ524 - Jun 17, 13:20 UTCJun 17, 13:30 UTC10m
2026-06-17 RVJ524 - Jun 17, 10:35 UTCJun 17, 10:50 UTC15m
2026-06-16 RVJ524 - Jun 16, 17:24 UTCJun 16, 18:55 UTC1h 30m
2026-06-16 RVJ524 PIT → TMA Jun 16, 09:40 UTCJun 16, 11:25 UTC1h 45m
2026-06-16 RVJ524 - Jun 16, 01:25 UTCJun 16, 02:34 UTC1h 10m
2026-06-15 RVJ524 - Jun 15, 19:50 UTCJun 15, 20:50 UTC1h 0m
2026-06-15 RVJ524 - Jun 15, 10:35 UTCJun 15, 11:15 UTC40m
2026-06-15 RVJ524 - Jun 15, 09:20 UTCJun 15, 09:54 UTC35m
2026-06-14 RVJ524 - Jun 14, 20:05 UTCJun 14, 20:55 UTC50m
2026-06-14 RVJ524 - Jun 14, 18:10 UTCJun 14, 19:05 UTC55m
2026-06-14 RVJ524 - Jun 14, 16:50 UTCJun 14, 17:45 UTC55m
2026-06-13 RVJ524 - Jun 13, 17:05 UTCJun 13, 17:15 UTC10m
2026-06-13 RVJ524 - Jun 13, 15:05 UTCJun 13, 16:25 UTC1h 20m
2026-06-12 RVJ524 - Jun 12, 16:40 UTCJun 12, 18:05 UTC1h 25m
2026-06-12 RVJ524 - Jun 12, 12:00 UTCJun 12, 14:15 UTC2h 15m
2026-06-11 RVJ524 - Jun 11, 18:25 UTCJun 11, 18:50 UTC25m
2026-06-11 RVJ524 - Jun 11, 16:35 UTCJun 11, 17:50 UTC1h 15m
2026-06-11 RVJ524 - Jun 11, 15:30 UTCJun 11, 16:00 UTC30m
2026-06-11 RVJ524 - Jun 11, 12:30 UTCJun 11, 13:10 UTC40m
2026-06-10 RVJ524 - Jun 10, 23:00 UTCJun 11, 01:15 UTC2h 15m

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 N524DM page for operator, model, and routing details .

Mode-S A69821 frequently asked

What is Mode-S code A69821?
A69821 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N524DM.
Where is Mode-S A69821 registered?
Mode-S code A69821 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 A69821 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A69821, octal 51514041, decimal 10,917,921.
What flights does A69821 operate?
Mode-S A69821 has broadcast 1 distinct callsign, including RVJ524.