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sensors Mode-S transponder

ADC8C7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9879Q · operated by REGISTRATION PENDING

Hex
ADC8C7
Octal
53344307
Decimal
11,389,127
Country
US
Tail
N9879Q
Type
C172
No current signal · last broadcast 15h ago
Flights observed
256
Distinct callsigns
1
Country
US
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S ADC8C7.

Country allocation

The ICAO 24-bit address ADC8C7 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
N9879Q - 255 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 N9879Q - Jul 20, 12:00 UTCJul 20, 13:30 UTC1h 30m
2026-07-19 N9879Q - Jul 19, 16:55 UTCJul 19, 18:15 UTC1h 20m
2026-07-16 N9879Q - Jul 16, 13:15 UTCJul 16, 13:25 UTC10m
2026-07-15 N9879Q - Jul 15, 17:30 UTCJul 15, 18:20 UTC50m
2026-07-14 N9879Q - Jul 14, 20:25 UTCJul 14, 21:35 UTC1h 10m
2026-07-14 N9879Q - Jul 14, 15:15 UTCJul 14, 15:50 UTC35m
2026-07-13 N9879Q - Jul 13, 18:35 UTCJul 13, 18:50 UTC15m
2026-07-12 N9879Q - Jul 12, 13:30 UTCJul 12, 15:01 UTC1h 30m
2026-07-12 N9879Q - Jul 12, 11:35 UTCJul 12, 11:50 UTC15m
2026-07-11 N9879Q - Jul 11, 12:35 UTCJul 11, 15:25 UTC2h 50m
2026-07-09 N9879Q - Jul 9, 21:30 UTCJul 9, 21:50 UTC20m
2026-07-09 N9879Q - Jul 9, 19:20 UTCJul 9, 19:35 UTC15m
2026-07-08 N9879Q - Jul 8, 23:55 UTCJul 9, 00:15 UTC20m
2026-07-08 N9879Q - Jul 8, 21:30 UTCJul 8, 21:40 UTC10m
2026-07-08 N9879Q - Jul 8, 17:30 UTCJul 8, 18:25 UTC55m
2026-07-08 N9879Q - Jul 8, 12:10 UTCJul 8, 13:30 UTC1h 20m
2026-07-07 N9879Q - Jul 7, 15:20 UTCJul 7, 15:35 UTC15m
2026-07-07 N9879Q - Jul 7, 12:40 UTCJul 7, 13:05 UTC25m
2026-07-06 N9879Q - Jul 6, 22:05 UTCJul 6, 22:55 UTC50m
2026-07-06 N9879Q - Jul 6, 10:25 UTCJul 6, 11:05 UTC40m
2026-07-05 N9879Q - Jul 5, 14:50 UTCJul 5, 15:05 UTC15m
2026-07-05 N9879Q - Jul 5, 11:20 UTCJul 5, 12:10 UTC50m
2026-07-05 N9879Q - Jul 5, 01:40 UTCJul 5, 02:30 UTC50m
2026-07-04 N9879Q - Jul 4, 17:45 UTCJul 4, 18:10 UTC25m
2026-07-04 N9879Q GMU → GMU Jul 4, 09:25 UTCJul 4, 11:30 UTC2h 5m
2026-07-04 N9879Q - Jul 4, 02:00 UTCJul 4, 03:05 UTC1h 5m
2026-07-03 N9879Q - Jul 3, 19:15 UTCJul 3, 21:40 UTC2h 25m
2026-07-03 N9879Q - Jul 3, 14:50 UTCJul 3, 15:00 UTC10m
2026-07-03 N9879Q - Jul 3, 12:35 UTCJul 3, 12:45 UTC10m
2026-07-02 N9879Q - Jul 2, 22:00 UTCJul 2, 22:55 UTC55m
2026-07-02 N9879Q - Jul 2, 19:45 UTCJul 2, 21:05 UTC1h 20m
2026-07-02 N9879Q - Jul 2, 13:55 UTCJul 2, 14:55 UTC1h 0m
2026-06-30 N9879Q - Jun 30, 18:45 UTCJun 30, 19:05 UTC20m
2026-06-30 N9879Q - Jun 30, 15:25 UTCJun 30, 15:40 UTC15m
2026-06-30 N9879Q - Jun 30, 12:00 UTCJun 30, 12:40 UTC40m
2026-06-29 N9879Q - Jun 29, 15:39 UTCJun 29, 15:49 UTC10m
2026-06-28 N9879Q - Jun 28, 23:39 UTCJun 29, 00:14 UTC35m
2026-06-28 N9879Q - Jun 28, 15:09 UTCJun 28, 15:40 UTC30m
2026-06-28 N9879Q - Jun 28, 14:04 UTCJun 28, 14:14 UTC10m
2026-06-27 N9879Q - Jun 27, 16:35 UTCJun 27, 16:44 UTC10m
2026-06-26 N9879Q - Jun 26, 21:59 UTCJun 26, 22:25 UTC25m
2026-06-26 N9879Q - Jun 26, 20:20 UTCJun 26, 20:50 UTC30m
2026-06-26 N9879Q - Jun 26, 15:39 UTCJun 26, 16:39 UTC1h 0m
2026-06-26 N9879Q - Jun 26, 13:45 UTCJun 26, 13:59 UTC15m
2026-06-25 N9879Q - Jun 25, 21:50 UTCJun 25, 22:39 UTC50m
2026-06-25 N9879Q - Jun 25, 19:54 UTCJun 25, 20:30 UTC35m
2026-06-25 N9879Q - Jun 25, 17:39 UTCJun 25, 18:45 UTC1h 5m
2026-06-25 N9879Q - Jun 25, 15:50 UTCJun 25, 16:55 UTC1h 5m
2026-06-24 N9879Q GMU → GMU Jun 24, 23:04 UTCJun 25, 00:09 UTC1h 5m
2026-06-24 N9879Q - Jun 24, 21:34 UTCJun 24, 22:00 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 N9879Q page for operator, model, and routing details .

Mode-S ADC8C7 frequently asked

What is Mode-S code ADC8C7?
ADC8C7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9879Q.
Where is Mode-S ADC8C7 registered?
Mode-S code ADC8C7 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 ADC8C7 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADC8C7, octal 53344307, decimal 11,389,127.
What flights does ADC8C7 operate?
Mode-S ADC8C7 has broadcast 1 distinct callsign, including N9879Q.