Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9A7C9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N721FJ · operated by 8TH DIMENSION ENTERPRISES LLC

Hex
A9A7C9
Octal
52323711
Decimal
11,118,537
Country
US
Tail
N721FJ
Type
P28A
No current signal · last broadcast 2d ago
Flights observed
86
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A9A7C9.

Country allocation

The ICAO 24-bit address A9A7C9 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
N721FJ - 86 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N721FJ BJC → BJC Jul 18, 15:05 UTCJul 18, 17:40 UTC2h 35m
2026-07-18 N721FJ BJC → BJC Jul 18, 11:40 UTCJul 18, 13:30 UTC1h 50m
2026-07-17 N721FJ - Jul 17, 00:55 UTCJul 17, 01:15 UTC20m
2026-07-17 N721FJ - Jul 17, 00:14 UTCJul 17, 00:50 UTC35m
2026-07-16 N721FJ BJC → BJC Jul 16, 19:10 UTCJul 16, 20:09 UTC1h 0m
2026-07-16 N721FJ - Jul 16, 17:25 UTCJul 16, 18:10 UTC45m
2026-07-16 N721FJ - Jul 16, 15:45 UTCJul 16, 16:30 UTC45m
2026-07-15 N721FJ - Jul 15, 19:35 UTCJul 15, 20:10 UTC35m
2026-07-15 N721FJ - Jul 15, 18:05 UTCJul 15, 18:40 UTC35m
2026-07-15 N721FJ BJC → BJC Jul 15, 15:20 UTCJul 15, 17:20 UTC2h 0m
2026-07-10 N721FJ BJC → BJC Jul 10, 19:10 UTCJul 10, 20:20 UTC1h 10m
2026-07-10 N721FJ BJC → BJC Jul 10, 16:25 UTCJul 10, 17:50 UTC1h 25m
2026-07-10 N721FJ BJC → BJC Jul 10, 12:45 UTCJul 10, 14:30 UTC1h 45m
2026-06-28 N721FJ BJC → BJC Jun 28, 18:40 UTCJun 28, 20:04 UTC1h 25m
2026-06-28 N721FJ BJC → BJC Jun 28, 16:00 UTCJun 28, 16:55 UTC55m
2026-06-28 N721FJ BJC → BJC Jun 28, 03:45 UTCJun 28, 04:05 UTC20m
2026-06-25 N721FJ BJC → BJC Jun 25, 00:09 UTCJun 25, 01:30 UTC1h 20m
2026-06-23 N721FJ BJC → BJC Jun 23, 16:09 UTCJun 23, 16:39 UTC30m
2026-06-22 N721FJ BJC → BJC Jun 22, 16:54 UTCJun 22, 17:40 UTC45m
2026-06-20 N721FJ BJC → BJC Jun 20, 16:09 UTCJun 20, 17:39 UTC1h 30m
2026-06-19 N721FJ BJC → BJC Jun 19, 21:30 UTCJun 19, 22:55 UTC1h 25m
2026-06-19 N721FJ BJC → BJC Jun 19, 17:29 UTCJun 19, 18:34 UTC1h 5m
2026-06-18 N721FJ BJC → BJC Jun 18, 16:50 UTCJun 18, 18:05 UTC1h 15m
2026-06-18 N721FJ BJC → BJC Jun 18, 00:55 UTCJun 18, 02:20 UTC1h 25m
2026-06-16 N721FJ BJC → BJC Jun 16, 22:15 UTCJun 16, 23:30 UTC1h 15m
2026-06-15 N721FJ BJC → BJC Jun 15, 18:10 UTCJun 15, 20:04 UTC1h 55m
2026-06-13 N721FJ COS → BJC Jun 13, 04:35 UTCJun 13, 05:30 UTC55m
2026-06-13 N721FJ BJC → COS Jun 13, 00:35 UTCJun 13, 01:20 UTC45m
2026-06-12 N721FJ BJC → BJC Jun 12, 16:20 UTCJun 12, 17:25 UTC1h 5m
2026-06-11 N721FJ BJC → BJC Jun 11, 22:20 UTCJun 12, 00:15 UTC1h 55m
2026-06-11 N721FJ BJC → BJC Jun 11, 15:40 UTCJun 11, 17:20 UTC1h 40m
2026-06-10 N721FJ BJC → BJC Jun 10, 18:10 UTCJun 10, 18:55 UTC45m
2026-06-10 N721FJ BJC → BJC Jun 10, 15:30 UTCJun 10, 16:50 UTC1h 20m
2026-06-05 N721FJ BJC → BJC Jun 5, 18:35 UTCJun 5, 20:00 UTC1h 25m
2026-06-05 N721FJ BJC → BJC Jun 5, 14:45 UTCJun 5, 16:30 UTC1h 45m
2026-06-04 N721FJ BJC → BJC Jun 4, 15:20 UTCJun 4, 17:10 UTC1h 50m
2026-06-03 N721FJ BJC → BJC Jun 3, 19:05 UTCJun 3, 20:20 UTC1h 15m
2026-06-03 N721FJ BJC → BJC Jun 3, 13:20 UTCJun 3, 15:35 UTC2h 15m
2026-06-02 N721FJ BJC → BJC Jun 2, 17:25 UTCJun 2, 18:05 UTC40m
2026-05-31 N721FJ BJC → BJC May 31, 13:05 UTCMay 31, 14:00 UTC55m
2026-05-30 N721FJ BJC → BJC May 30, 12:45 UTCMay 30, 13:50 UTC1h 5m
2026-05-29 N721FJ BJC → BJC May 29, 16:00 UTCMay 29, 17:35 UTC1h 35m
2026-05-27 N721FJ BJC → BJC May 27, 17:00 UTCMay 27, 18:30 UTC1h 30m
2026-05-27 N721FJ BJC → BJC May 27, 12:50 UTCMay 27, 14:05 UTC1h 15m
2026-05-26 N721FJ BJC → BJC May 26, 16:15 UTCMay 26, 17:55 UTC1h 40m
2026-05-25 N721FJ BJC → BJC May 25, 14:15 UTCMay 25, 15:55 UTC1h 40m
2026-05-24 N721FJ - May 24, 19:45 UTCMay 24, 20:10 UTC25m
2026-05-24 N721FJ - May 24, 14:05 UTCMay 24, 14:45 UTC40m
2026-05-22 N721FJ BJC → BJC May 22, 18:55 UTCMay 22, 19:40 UTC45m
2026-05-21 N721FJ BJC → BJC May 21, 21:30 UTCMay 21, 22:20 UTC50m

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 N721FJ page for operator, model, and routing details .

Mode-S A9A7C9 frequently asked

What is Mode-S code A9A7C9?
A9A7C9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N721FJ.
Where is Mode-S A9A7C9 registered?
Mode-S code A9A7C9 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 A9A7C9 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 A9A7C9, octal 52323711, decimal 11,118,537.
What flights does A9A7C9 operate?
Mode-S A9A7C9 has broadcast 1 distinct callsign, including N721FJ.