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sensors Mode-S transponder

ADCFEF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9897Q · CESSNA 172 Skyhawk · operated by ABOVE ALL AVIATION INC

Hex
ADCFEF
Octal
53347757
Decimal
11,390,959
Country
US
Tail
N9897Q
Type
C172
No current signal · last broadcast 2d ago
Flights observed
124
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S ADCFEF.

Country allocation

The ICAO 24-bit address ADCFEF 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
N9897Q - 124 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N9897Q - Jul 26, 17:15 UTCJul 26, 18:40 UTC1h 25m
2026-07-25 N9897Q - Jul 25, 21:50 UTCJul 25, 22:40 UTC50m
2026-07-25 N9897Q - Jul 25, 19:50 UTCJul 25, 20:45 UTC55m
2026-07-25 N9897Q - Jul 25, 16:40 UTCJul 25, 18:20 UTC1h 40m
2026-07-24 N9897Q - Jul 24, 21:15 UTCJul 25, 00:05 UTC2h 50m
2026-07-24 N9897Q - Jul 24, 18:10 UTCJul 24, 19:00 UTC50m
2026-07-24 N9897Q - Jul 24, 15:35 UTCJul 24, 16:35 UTC1h 0m
2026-07-24 N9897Q - Jul 24, 00:55 UTCJul 24, 01:40 UTC45m
2026-07-23 N9897Q - Jul 23, 20:40 UTCJul 23, 21:25 UTC45m
2026-07-23 N9897Q VNY → VNY Jul 23, 18:15 UTCJul 23, 19:30 UTC1h 15m
2026-07-23 N9897Q SBA → VNY Jul 23, 01:00 UTCJul 23, 01:55 UTC55m
2026-07-22 N9897Q - Jul 22, 17:30 UTCJul 22, 17:55 UTC25m
2026-07-22 N9897Q - Jul 22, 00:50 UTCJul 22, 02:35 UTC1h 45m
2026-07-21 N9897Q - Jul 21, 21:55 UTCJul 21, 23:30 UTC1h 35m
2026-07-21 N9897Q SBA → SBA Jul 21, 18:50 UTCJul 21, 19:45 UTC55m
2026-07-21 N9897Q - Jul 21, 00:05 UTCJul 21, 00:35 UTC30m
2026-07-20 N9897Q SBA → SBA Jul 20, 20:25 UTCJul 20, 22:00 UTC1h 35m
2026-07-20 N9897Q - Jul 20, 18:00 UTCJul 20, 18:35 UTC35m
2026-07-20 N9897Q SBA → SBA Jul 20, 14:35 UTCJul 20, 15:35 UTC1h 0m
2026-07-20 N9897Q SBA → SBA Jul 20, 00:25 UTCJul 20, 01:50 UTC1h 25m
2026-07-19 N9897Q SBA → SBA Jul 19, 21:35 UTCJul 19, 22:15 UTC40m
2026-07-18 N9897Q SBA → SBA Jul 18, 00:04 UTCJul 18, 00:45 UTC40m
2026-07-17 N9897Q SBA → SBA Jul 17, 21:55 UTCJul 17, 22:45 UTC50m
2026-07-16 N9897Q - Jul 16, 23:40 UTCJul 17, 00:55 UTC1h 15m
2026-07-16 N9897Q SBA → SBA Jul 16, 17:45 UTCJul 16, 18:34 UTC50m
2026-06-27 N9897Q SBA → SBA Jun 27, 20:49 UTCJun 27, 21:44 UTC55m
2026-06-26 N9897Q SBA → SBA Jun 26, 00:15 UTCJun 26, 00:39 UTC25m
2026-06-25 N9897Q - Jun 25, 14:34 UTCJun 25, 15:34 UTC1h 0m
2026-06-24 N9897Q SBA → SBA Jun 24, 23:54 UTCJun 25, 01:04 UTC1h 10m
2026-06-24 N9897Q - Jun 24, 00:30 UTCJun 24, 01:44 UTC1h 15m
2026-06-23 N9897Q - Jun 23, 19:00 UTCJun 23, 19:34 UTC35m
2026-06-23 N9897Q - Jun 23, 17:04 UTCJun 23, 17:39 UTC35m
2026-06-22 N9897Q SBA → SBA Jun 22, 23:39 UTCJun 23, 00:45 UTC1h 5m
2026-06-22 N9897Q SBA → SBA Jun 22, 17:20 UTCJun 22, 17:44 UTC25m
2026-06-21 N9897Q SBA → SBA Jun 21, 01:14 UTCJun 21, 01:39 UTC25m
2026-06-20 N9897Q SBA → SBA Jun 20, 17:34 UTCJun 20, 18:10 UTC35m
2026-06-18 N9897Q - Jun 18, 18:20 UTCJun 18, 19:20 UTC1h 0m
2026-06-18 N9897Q - Jun 18, 00:50 UTCJun 18, 02:15 UTC1h 25m
2026-06-17 N9897Q SBA → SBA Jun 17, 22:45 UTCJun 17, 23:45 UTC1h 0m
2026-06-15 N9897Q SBA → SBA Jun 15, 21:50 UTCJun 15, 22:45 UTC55m
2026-06-13 N9897Q SBA → SBA Jun 13, 17:00 UTCJun 13, 18:20 UTC1h 20m
2026-06-11 N9897Q - Jun 11, 00:15 UTCJun 11, 01:10 UTC55m
2026-06-10 N9897Q - Jun 10, 20:40 UTCJun 10, 22:20 UTC1h 40m
2026-06-09 N9897Q - Jun 9, 20:10 UTCJun 9, 20:45 UTC35m
2026-06-08 N9897Q - Jun 8, 22:40 UTCJun 8, 23:45 UTC1h 5m
2026-06-08 N9897Q SBA → SBA Jun 8, 20:35 UTCJun 8, 21:25 UTC50m
2026-06-07 N9897Q SBA → SBA Jun 7, 23:05 UTCJun 7, 23:45 UTC40m
2026-06-06 N9897Q SBA → SBA Jun 6, 17:54 UTCJun 6, 18:50 UTC55m
2026-06-05 N9897Q - Jun 5, 21:50 UTCJun 5, 22:20 UTC30m
2026-06-02 N9897Q SBA → SBA Jun 2, 23:10 UTCJun 3, 00:05 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 N9897Q page for operator, model, and routing details .

Mode-S ADCFEF frequently asked

What is Mode-S code ADCFEF?
ADCFEF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9897Q.
Where is Mode-S ADCFEF registered?
Mode-S code ADCFEF 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 ADCFEF broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADCFEF, octal 53347757, decimal 11,390,959.
What flights does ADCFEF operate?
Mode-S ADCFEF has broadcast 1 distinct callsign, including N9897Q.