Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADC569

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N987CT · DIAMOND DA-20 · operated by DIAMOND AIRCRAFT SALES OF KENTUCKY LLC

Hex
ADC569
Octal
53342551
Decimal
11,388,265
Country
US
Tail
N987CT
Type
DV20
No current signal · last broadcast Jul 24, 14:40 UTC
Flights observed
65
Distinct callsigns
1
Country
US
Last broadcast
Jul 24, 14:40 UTC

Last known position

Most recent position reported by Mode-S ADC569.

Country allocation

The ICAO 24-bit address ADC569 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
N987CT - 65 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N987CT - Jul 24, 13:30 UTCJul 24, 14:40 UTC1h 10m
2026-07-23 N987CT - Jul 23, 23:40 UTCJul 24, 00:10 UTC30m
2026-07-23 N987CT - Jul 23, 22:50 UTCJul 23, 23:05 UTC15m
2026-07-23 N987CT - Jul 23, 15:20 UTCJul 23, 15:30 UTC10m
2026-07-23 N987CT - Jul 23, 13:40 UTCJul 23, 13:50 UTC10m
2026-07-22 N987CT - Jul 22, 00:00 UTCJul 22, 00:30 UTC30m
2026-07-21 N987CT - Jul 21, 20:40 UTCJul 21, 22:00 UTC1h 20m
2026-07-20 N987CT - Jul 20, 21:45 UTCJul 20, 22:25 UTC40m
2026-07-17 N987CT - Jul 17, 14:30 UTCJul 17, 14:44 UTC15m
2026-07-17 N987CT - Jul 17, 13:29 UTCJul 17, 13:55 UTC25m
2026-07-17 N987CT - Jul 17, 02:05 UTCJul 17, 02:54 UTC50m
2026-07-13 N987CT - Jul 13, 23:00 UTCJul 13, 23:50 UTC50m
2026-07-13 N987CT - Jul 13, 21:40 UTCJul 13, 22:00 UTC20m
2026-07-13 N987CT - Jul 13, 20:50 UTCJul 13, 21:05 UTC15m
2026-07-13 N987CT - Jul 13, 15:20 UTCJul 13, 15:35 UTC15m
2026-07-13 N987CT - Jul 13, 13:45 UTCJul 13, 14:40 UTC55m
2026-07-08 N987CT - Jul 8, 19:45 UTCJul 8, 20:05 UTC20m
2026-07-08 N987CT - Jul 8, 18:50 UTCJul 8, 19:10 UTC20m
2026-07-08 N987CT - Jul 8, 14:25 UTCJul 8, 14:45 UTC20m
2026-07-08 N987CT - Jul 8, 11:45 UTCJul 8, 12:20 UTC35m
2026-07-07 N987CT HUF → HUF Jul 7, 22:30 UTCJul 7, 23:55 UTC1h 25m
2026-07-07 N987CT - Jul 7, 19:55 UTCJul 7, 20:05 UTC10m
2026-07-07 N987CT - Jul 7, 19:05 UTCJul 7, 19:20 UTC15m
2026-07-06 N987CT HUF → HUF Jul 6, 18:25 UTCJul 6, 18:45 UTC20m
2026-07-02 N987CT - Jul 2, 13:55 UTCJul 2, 14:50 UTC55m
2026-07-02 N987CT - Jul 2, 11:45 UTCJul 2, 11:55 UTC10m
2026-07-01 N987CT - Jul 1, 13:30 UTCJul 1, 14:30 UTC1h 0m
2026-06-30 N987CT - Jun 30, 13:40 UTCJun 30, 13:50 UTC10m
2026-06-30 N987CT - Jun 30, 12:20 UTCJun 30, 12:50 UTC30m
2026-06-30 N987CT - Jun 30, 11:35 UTCJun 30, 11:45 UTC10m
2026-06-29 N987CT - Jun 29, 15:19 UTCJun 29, 15:54 UTC35m
2026-06-25 N987CT - Jun 25, 02:39 UTCJun 25, 03:24 UTC45m
2026-06-24 N987CT HUF → HUF Jun 24, 22:10 UTCJun 24, 22:29 UTC20m
2026-06-24 N987CT - Jun 24, 20:44 UTCJun 24, 21:24 UTC40m
2026-06-17 N987CT HUF → HUF Jun 17, 11:35 UTCJun 17, 12:45 UTC1h 10m
2026-06-15 N987CT - Jun 15, 21:45 UTCJun 15, 22:30 UTC45m
2026-06-10 N987CT - Jun 10, 14:15 UTCJun 10, 14:35 UTC20m
2026-05-13 N987CT - May 13, 21:45 UTCMay 13, 21:55 UTC10m
2026-05-12 N987CT - May 12, 12:35 UTCMay 12, 12:45 UTC10m
2026-05-12 N987CT - May 12, 11:35 UTCMay 12, 11:50 UTC15m
2026-05-11 N987CT - May 11, 19:55 UTCMay 11, 20:15 UTC20m
2026-05-11 N987CT - May 11, 19:10 UTCMay 11, 19:20 UTC10m
2026-05-08 N987CT - May 8, 13:35 UTCMay 8, 15:25 UTC1h 50m
2026-05-07 N987CT - May 7, 21:35 UTCMay 7, 22:10 UTC35m
2026-05-07 N987CT - May 7, 19:30 UTCMay 7, 19:50 UTC20m
2026-05-07 N987CT - May 7, 17:00 UTCMay 7, 18:10 UTC1h 10m
2026-05-07 N987CT HUF → HUF May 7, 11:45 UTCMay 7, 12:40 UTC55m
2026-05-06 N987CT - May 6, 23:00 UTCMay 6, 23:45 UTC45m
2026-05-06 N987CT - May 6, 21:10 UTCMay 6, 22:20 UTC1h 10m
2026-05-06 N987CT - May 6, 19:05 UTCMay 6, 20:00 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 N987CT page for operator, model, and routing details .

Mode-S ADC569 frequently asked

What is Mode-S code ADC569?
ADC569 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N987CT.
Where is Mode-S ADC569 registered?
Mode-S code ADC569 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 ADC569 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 14:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADC569, octal 53342551, decimal 11,388,265.
What flights does ADC569 operate?
Mode-S ADC569 has broadcast 1 distinct callsign, including N987CT.