Apparatus

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sensors Mode-S transponder

A9A749

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N721AF · PILATUS PC-12 · operated by AVIATION 17 LLC, BAYBOYS LLC, LOONKAR RAKESH K, MCCORMICK DAVID H, STEWART BETH A, WEINBERG JOHN S

Hex
A9A749
Octal
52323511
Decimal
11,118,409
Country
US
Tail
N721AF
Type
PC12
No current signal · last broadcast Jul 22, 22:15 UTC
Flights observed
177
Distinct callsigns
19
Country
US
Last broadcast
Jul 22, 22:15 UTC

Last known position

Most recent position reported by Mode-S A9A749.

Country allocation

The ICAO 24-bit address A9A749 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 19 distinct

Callsign Airline Flights Last seen
CNS58 - 32 2026-06-17
CNS147 - 20 2026-07-05
CNS801 - 15 2026-06-08
CNS34 - 15 2026-07-12
CNS370 - 14 2026-06-29
CNS308 - 12 2026-07-08
CNS3311 - 11 2026-07-20
N721AF - 10 2026-07-16
CNS342 - 9 2026-07-14
CNS678 - 8 2026-07-09
CNS46 - 8 2026-07-18
CNS123 - 6 2026-05-31
CNS128 - 5 2026-07-22
CNS66 - 3 2026-06-27
CNS513 - 3 2026-06-09
CNS85 - 2 2026-04-13
CNS32 - 2 2026-06-19
CNS724 - 1 2026-06-30
CNS541 - 1 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 CNS128 - Jul 22, 19:40 UTCJul 22, 22:15 UTC2h 35m
2026-07-22 CNS128 - Jul 22, 14:00 UTCJul 22, 18:45 UTC4h 45m
2026-07-22 CNS128 - Jul 22, 11:35 UTCJul 22, 11:55 UTC20m
2026-07-21 CNS128 - Jul 21, 20:25 UTCJul 21, 21:45 UTC1h 20m
2026-07-21 CNS128 - Jul 21, 17:10 UTCJul 21, 19:45 UTC2h 35m
2026-07-20 CNS3311 - Jul 20, 13:25 UTCJul 20, 14:05 UTC40m
2026-07-20 CNS3311 - Jul 20, 10:55 UTCJul 20, 11:25 UTC30m
2026-07-19 CNS3311 - Jul 19, 21:30 UTCJul 19, 21:55 UTC25m
2026-07-19 CNS3311 - Jul 19, 20:10 UTCJul 19, 20:50 UTC40m
2026-07-19 CNS3311 - Jul 19, 18:25 UTCJul 19, 19:30 UTC1h 5m
2026-07-19 CNS3311 - Jul 19, 16:05 UTCJul 19, 17:40 UTC1h 35m
2026-07-19 CNS3311 - Jul 19, 14:05 UTCJul 19, 14:35 UTC30m
2026-07-19 CNS3311 PSM → BGR Jul 19, 12:40 UTCJul 19, 13:25 UTC45m
2026-07-18 CNS46 - Jul 18, 15:10 UTCJul 18, 20:00 UTC4h 50m
2026-07-18 CNS46 - Jul 18, 13:00 UTCJul 18, 14:15 UTC1h 15m
2026-07-17 CNS46 - Jul 17, 16:00 UTCJul 17, 17:35 UTC1h 35m
2026-07-17 CNS46 - Jul 17, 14:20 UTCJul 17, 15:00 UTC40m
2026-07-17 CNS46 ORL → FMY Jul 17, 12:30 UTCJul 17, 13:15 UTC45m
2026-07-16 CNS46 TMB → ORL Jul 16, 21:25 UTCJul 16, 22:19 UTC55m
2026-07-16 CNS46 TPA → TMB Jul 16, 19:30 UTCJul 16, 20:25 UTC55m
2026-07-16 N721AF - Jul 16, 17:30 UTCJul 16, 18:34 UTC1h 5m
2026-07-16 N721AF - Jul 16, 12:55 UTCJul 16, 13:25 UTC30m
2026-07-16 CNS46 - Jul 16, 11:25 UTCJul 16, 12:05 UTC40m
2026-07-15 N721AF - Jul 15, 17:20 UTCJul 15, 18:35 UTC1h 15m
2026-07-15 N721AF - Jul 15, 13:10 UTCJul 15, 15:40 UTC2h 30m
2026-07-15 CNS541 - Jul 15, 10:55 UTCJul 15, 12:35 UTC1h 40m
2026-07-14 CNS342 - Jul 14, 14:40 UTCJul 14, 16:40 UTC2h 0m
2026-07-14 CNS342 - Jul 14, 13:40 UTCJul 14, 14:00 UTC20m
2026-07-14 CNS342 - Jul 14, 12:05 UTCJul 14, 12:50 UTC45m
2026-07-14 CNS342 - Jul 14, 10:05 UTCJul 14, 11:10 UTC1h 5m
2026-07-13 CNS342 - Jul 13, 18:50 UTCJul 13, 19:40 UTC50m
2026-07-13 CNS342 - Jul 13, 17:00 UTCJul 13, 18:15 UTC1h 15m
2026-07-13 CNS342 - Jul 13, 14:25 UTCJul 13, 15:55 UTC1h 30m
2026-07-13 CNS342 - Jul 13, 12:50 UTCJul 13, 13:15 UTC25m
2026-07-13 CNS342 - Jul 13, 09:55 UTCJul 13, 11:55 UTC2h 0m
2026-07-12 CNS34 - Jul 12, 22:15 UTCJul 12, 23:40 UTC1h 25m
2026-07-12 CNS34 - Jul 12, 19:15 UTCJul 12, 20:55 UTC1h 40m
2026-07-12 CNS34 - Jul 12, 17:20 UTCJul 12, 18:20 UTC1h 0m
2026-07-12 CNS34 - Jul 12, 15:40 UTCJul 12, 16:20 UTC40m
2026-07-12 CNS34 - Jul 12, 14:10 UTCJul 12, 14:55 UTC45m
2026-07-11 CNS34 PVC → MVY Jul 11, 22:25 UTCJul 11, 22:40 UTC15m
2026-07-11 CNS34 BED → PVC Jul 11, 21:35 UTCJul 11, 21:55 UTC20m
2026-07-11 CNS34 - Jul 11, 19:00 UTCJul 11, 19:30 UTC30m
2026-07-11 CNS34 - Jul 11, 17:30 UTCJul 11, 18:05 UTC35m
2026-07-11 CNS34 - Jul 11, 16:30 UTCJul 11, 16:45 UTC15m
2026-07-11 CNS34 - Jul 11, 15:05 UTCJul 11, 15:40 UTC35m
2026-07-10 CNS34 - Jul 10, 21:50 UTCJul 10, 22:05 UTC15m
2026-07-10 CNS34 - Jul 10, 20:45 UTCJul 10, 21:20 UTC35m
2026-07-10 CNS34 - Jul 10, 16:30 UTCJul 10, 17:35 UTC1h 5m
2026-07-10 CNS34 - Jul 10, 13:55 UTCJul 10, 15:50 UTC1h 55m

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 N721AF page for operator, model, and routing details .

Mode-S A9A749 frequently asked

What is Mode-S code A9A749?
A9A749 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N721AF.
Where is Mode-S A9A749 registered?
Mode-S code A9A749 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 A9A749 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9A749, octal 52323511, decimal 11,118,409.
What flights does A9A749 operate?
Mode-S A9A749 has broadcast 19 distinct callsigns, including CNS58, CNS147, CNS801, CNS34, CNS370.