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sensors Mode-S transponder

ADCFA9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9895Q · CESSNA 172 Skyhawk · operated by CK LEASING SERVICES LLC

Hex
ADCFA9
Octal
53347651
Decimal
11,390,889
Country
US
Tail
N9895Q
Type
C172
No current signal · last broadcast 1d ago
Flights observed
269
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ADCFA9.

Country allocation

The ICAO 24-bit address ADCFA9 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
N9895Q - 269 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N9895Q - Jul 16, 22:30 UTCJul 16, 23:20 UTC50m
2026-07-16 N9895Q - Jul 16, 20:39 UTCJul 16, 20:45 UTC5m
2026-07-16 N9895Q - Jul 16, 19:05 UTCJul 16, 19:20 UTC15m
2026-07-16 N9895Q - Jul 16, 18:40 UTCJul 16, 18:59 UTC20m
2026-07-16 N9895Q - Jul 16, 03:10 UTCJul 16, 05:00 UTC1h 50m
2026-07-16 N9895Q MIV → MIV Jul 16, 02:45 UTCJul 16, 03:05 UTC20m
2026-07-16 N9895Q - Jul 16, 02:10 UTCJul 16, 02:40 UTC30m
2026-07-15 N9895Q - Jul 15, 21:15 UTCJul 15, 21:50 UTC35m
2026-07-15 N9895Q - Jul 15, 18:55 UTCJul 15, 20:05 UTC1h 10m
2026-07-15 N9895Q - Jul 15, 17:35 UTCJul 15, 18:05 UTC30m
2026-07-15 N9895Q - Jul 15, 15:35 UTCJul 15, 16:40 UTC1h 5m
2026-07-15 N9895Q - Jul 15, 12:15 UTCJul 15, 12:55 UTC40m
2026-07-15 N9895Q - Jul 15, 02:25 UTCJul 15, 04:05 UTC1h 40m
2026-07-15 N9895Q - Jul 15, 01:20 UTCJul 15, 02:20 UTC1h 0m
2026-07-14 N9895Q - Jul 14, 22:45 UTCJul 14, 23:45 UTC1h 0m
2026-07-14 N9895Q - Jul 14, 19:30 UTCJul 14, 19:55 UTC25m
2026-07-14 N9895Q - Jul 14, 18:40 UTCJul 14, 19:20 UTC40m
2026-07-14 N9895Q - Jul 14, 16:55 UTCJul 14, 17:50 UTC55m
2026-07-14 N9895Q - Jul 14, 13:40 UTCJul 14, 14:40 UTC1h 0m
2026-07-14 N9895Q - Jul 14, 12:40 UTCJul 14, 13:00 UTC20m
2026-07-13 N9895Q - Jul 13, 22:55 UTCJul 13, 23:20 UTC25m
2026-07-13 N9895Q - Jul 13, 22:40 UTCJul 13, 22:50 UTC10m
2026-07-13 N9895Q - Jul 13, 21:00 UTCJul 13, 21:55 UTC55m
2026-07-13 N9895Q - Jul 13, 19:00 UTCJul 13, 19:35 UTC35m
2026-07-13 N9895Q - Jul 13, 18:40 UTCJul 13, 18:50 UTC10m
2026-07-13 N9895Q - Jul 13, 15:45 UTCJul 13, 16:40 UTC55m
2026-07-13 N9895Q - Jul 13, 12:45 UTCJul 13, 14:35 UTC1h 50m
2026-07-13 N9895Q - Jul 13, 10:40 UTCJul 13, 11:45 UTC1h 5m
2026-07-12 N9895Q - Jul 12, 23:25 UTCJul 12, 23:55 UTC30m
2026-07-12 N9895Q - Jul 12, 22:35 UTCJul 12, 23:15 UTC40m
2026-07-12 N9895Q - Jul 12, 19:40 UTCJul 12, 20:30 UTC50m
2026-07-12 N9895Q - Jul 12, 16:15 UTCJul 12, 16:30 UTC15m
2026-07-12 N9895Q - Jul 12, 15:55 UTCJul 12, 16:10 UTC15m
2026-07-11 N9895Q - Jul 11, 12:40 UTCJul 11, 13:40 UTC1h 0m
2026-07-10 N9895Q - Jul 10, 18:20 UTCJul 10, 19:25 UTC1h 5m
2026-07-10 N9895Q - Jul 10, 17:00 UTCJul 10, 18:05 UTC1h 5m
2026-07-10 N9895Q - Jul 10, 15:45 UTCJul 10, 16:05 UTC20m
2026-07-10 N9895Q - Jul 10, 14:55 UTCJul 10, 15:40 UTC45m
2026-07-10 N9895Q - Jul 10, 12:45 UTCJul 10, 13:35 UTC50m
2026-07-08 N9895Q - Jul 8, 15:35 UTCJul 8, 16:15 UTC40m
2026-07-05 N9895Q - Jul 5, 15:30 UTCJul 5, 16:30 UTC1h 0m
2026-07-04 N9895Q - Jul 4, 12:40 UTCJul 4, 13:00 UTC20m
2026-07-04 N9895Q - Jul 4, 11:50 UTCJul 4, 12:35 UTC45m
2026-07-03 N9895Q - Jul 3, 20:10 UTCJul 3, 20:25 UTC15m
2026-07-03 N9895Q - Jul 3, 18:30 UTCJul 3, 19:55 UTC1h 25m
2026-07-03 N9895Q - Jul 3, 15:00 UTCJul 3, 15:30 UTC30m
2026-07-03 N9895Q - Jul 3, 12:30 UTCJul 3, 13:40 UTC1h 10m
2026-07-02 N9895Q - Jul 2, 18:45 UTCJul 2, 19:45 UTC1h 0m
2026-07-02 N9895Q - Jul 2, 14:55 UTCJul 2, 15:50 UTC55m
2026-07-02 N9895Q - Jul 2, 12:40 UTCJul 2, 13:20 UTC40m

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 N9895Q page for operator, model, and routing details .

Mode-S ADCFA9 frequently asked

What is Mode-S code ADCFA9?
ADCFA9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9895Q.
Where is Mode-S ADCFA9 registered?
Mode-S code ADCFA9 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 ADCFA9 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADCFA9, octal 53347651, decimal 11,390,889.
What flights does ADCFA9 operate?
Mode-S ADCFA9 has broadcast 1 distinct callsign, including N9895Q.