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sensors Mode-S transponder

A690DD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N522FD · operated by CIRRUS DESIGN CORP

Hex
A690DD
Octal
51510335
Decimal
10,916,061
Country
US
Tail
N522FD
Type
SR22
No current signal · last broadcast Jul 18, 02:50 UTC
Flights observed
56
Distinct callsigns
1
Country
US
Last broadcast
Jul 18, 02:50 UTC

Last known position

Most recent position reported by Mode-S A690DD.

Country allocation

The ICAO 24-bit address A690DD 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
N522FD - 56 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N522FD - Jul 18, 02:00 UTCJul 18, 02:50 UTC51m
2026-07-17 N522FD - Jul 17, 23:39 UTCJul 18, 00:15 UTC35m
2026-07-17 N522FD - Jul 17, 20:29 UTCJul 17, 22:29 UTC2h 0m
2026-07-16 N522FD - Jul 16, 02:50 UTCJul 16, 03:55 UTC1h 5m
2026-07-15 N522FD - Jul 15, 14:00 UTCJul 15, 14:15 UTC15m
2026-07-15 N522FD - Jul 15, 12:15 UTCJul 15, 12:30 UTC15m
2026-07-10 N522FD - Jul 10, 19:25 UTCJul 10, 20:00 UTC35m
2026-07-10 N522FD - Jul 10, 17:25 UTCJul 10, 17:45 UTC20m
2026-07-08 N522FD - Jul 8, 18:55 UTCJul 8, 19:35 UTC40m
2026-07-08 N522FD - Jul 8, 15:05 UTCJul 8, 16:20 UTC1h 15m
2026-07-03 N522FD - Jul 3, 15:30 UTCJul 3, 16:55 UTC1h 25m
2026-07-02 N522FD - Jul 2, 19:40 UTCJul 2, 21:10 UTC1h 30m
2026-07-02 N522FD - Jul 2, 02:35 UTCJul 2, 04:00 UTC1h 25m
2026-07-01 N522FD - Jul 1, 16:10 UTCJul 1, 17:30 UTC1h 20m
2026-06-29 N522FD - Jun 29, 15:09 UTCJun 29, 15:45 UTC35m
2026-06-27 N522FD - Jun 27, 15:19 UTCJun 27, 15:49 UTC30m
2026-06-25 N522FD - Jun 25, 14:09 UTCJun 25, 14:59 UTC50m
2026-06-24 N522FD - Jun 24, 16:29 UTCJun 24, 17:10 UTC40m
2026-06-22 N522FD - Jun 22, 20:30 UTCJun 22, 21:14 UTC45m
2026-06-21 N522FD - Jun 21, 02:45 UTCJun 21, 03:19 UTC35m
2026-06-20 N522FD - Jun 20, 20:05 UTCJun 20, 20:34 UTC30m
2026-06-20 N522FD - Jun 20, 18:45 UTCJun 20, 19:34 UTC50m
2026-06-19 N522FD - Jun 19, 19:54 UTCJun 19, 21:44 UTC1h 50m
2026-06-18 N522FD - Jun 18, 19:50 UTCJun 18, 21:45 UTC1h 55m
2026-06-18 N522FD - Jun 18, 14:50 UTCJun 18, 16:35 UTC1h 45m
2026-06-17 N522FD - Jun 17, 16:20 UTCJun 17, 17:30 UTC1h 10m
2026-06-13 N522FD - Jun 13, 20:05 UTCJun 13, 21:10 UTC1h 5m
2026-06-13 N522FD - Jun 13, 17:10 UTCJun 13, 17:30 UTC20m
2026-06-13 N522FD - Jun 13, 16:05 UTCJun 13, 16:25 UTC20m
2026-06-13 N522FD - Jun 13, 03:05 UTCJun 13, 03:25 UTC20m
2026-06-04 N522FD - Jun 4, 21:10 UTCJun 4, 22:05 UTC55m
2026-06-03 N522FD - Jun 3, 21:05 UTCJun 3, 21:20 UTC15m
2026-06-03 N522FD - Jun 3, 19:45 UTCJun 3, 20:10 UTC25m
2026-06-03 N522FD - Jun 3, 16:30 UTCJun 3, 17:15 UTC45m
2026-05-31 N522FD - May 31, 15:15 UTCMay 31, 16:45 UTC1h 30m
2026-05-30 N522FD - May 30, 15:00 UTCMay 30, 17:10 UTC2h 10m
2026-05-18 N522FD - May 18, 17:00 UTCMay 18, 19:40 UTC2h 39m
2026-05-16 N522FD - May 16, 18:35 UTCMay 16, 20:15 UTC1h 40m
2026-05-16 N522FD - May 16, 15:20 UTCMay 16, 17:01 UTC1h 40m
2026-05-14 N522FD - May 14, 21:25 UTCMay 14, 22:05 UTC40m
2026-05-14 N522FD - May 14, 20:00 UTCMay 14, 20:25 UTC25m
2026-05-13 N522FD - May 13, 21:05 UTCMay 13, 21:45 UTC40m
2026-05-13 N522FD - May 13, 16:35 UTCMay 13, 17:35 UTC1h 0m
2026-05-12 N522FD - May 12, 20:25 UTCMay 12, 21:30 UTC1h 5m
2026-05-08 N522FD - May 8, 15:35 UTCMay 8, 15:50 UTC15m
2026-05-08 N522FD - May 8, 14:50 UTCMay 8, 15:00 UTC10m
2026-05-02 N522FD - May 2, 21:05 UTCMay 2, 21:20 UTC15m
2026-05-02 N522FD - May 2, 19:25 UTCMay 2, 19:55 UTC30m
2026-05-02 N522FD - May 2, 16:30 UTCMay 2, 16:50 UTC20m
2026-05-02 N522FD - May 2, 15:05 UTCMay 2, 15:30 UTC25m

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 N522FD page for operator, model, and routing details .

Mode-S A690DD frequently asked

What is Mode-S code A690DD?
A690DD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N522FD.
Where is Mode-S A690DD registered?
Mode-S code A690DD 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 A690DD broadcasting right now?
No active broadcast right now. Last signal was Jul 18, 02:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A690DD, octal 51510335, decimal 10,916,061.
What flights does A690DD operate?
Mode-S A690DD has broadcast 1 distinct callsign, including N522FD.