Apparatus

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sensors Mode-S transponder

A9D6F1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N733HT · CESSNA 172 Skyhawk · operated by BRAZOS VALLEY FLIGHT SERVICES LLC

Hex
A9D6F1
Octal
52353361
Decimal
11,130,609
Country
US
Tail
N733HT
Type
C172
No current signal · last broadcast 5h ago
Flights observed
170
Distinct callsigns
1
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A9D6F1.

Country allocation

The ICAO 24-bit address A9D6F1 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
N733HT - 170 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N733HT - Jul 24, 23:35 UTCJul 25, 00:35 UTC1h 0m
2026-07-24 N733HT CLL → CLL Jul 24, 20:40 UTCJul 24, 21:40 UTC1h 0m
2026-07-23 N733HT CLL → CLL Jul 23, 16:30 UTCJul 23, 18:10 UTC1h 40m
2026-07-23 N733HT - Jul 23, 14:40 UTCJul 23, 15:20 UTC40m
2026-07-22 N733HT - Jul 22, 17:50 UTCJul 22, 18:55 UTC1h 5m
2026-07-21 N733HT - Jul 21, 21:40 UTCJul 21, 22:55 UTC1h 15m
2026-07-21 N733HT CLL → CLL Jul 21, 19:10 UTCJul 21, 20:50 UTC1h 40m
2026-07-21 N733HT - Jul 21, 16:45 UTCJul 21, 17:55 UTC1h 10m
2026-07-20 N733HT CLL → CLL Jul 20, 23:05 UTCJul 21, 01:55 UTC2h 49m
2026-07-20 N733HT - Jul 20, 19:35 UTCJul 20, 20:50 UTC1h 15m
2026-07-19 N733HT CLL → CLL Jul 19, 23:15 UTCJul 20, 01:15 UTC2h 0m
2026-07-19 N733HT CLL → CLL Jul 19, 17:05 UTCJul 19, 18:05 UTC1h 0m
2026-07-19 N733HT CLL → CLL Jul 19, 01:00 UTCJul 19, 01:15 UTC15m
2026-07-19 N733HT CLL → CLL Jul 19, 00:10 UTCJul 19, 00:50 UTC40m
2026-07-17 N733HT CLL → CLL Jul 17, 23:45 UTCJul 18, 00:35 UTC50m
2026-07-17 N733HT CLL → CLL Jul 17, 22:00 UTCJul 17, 22:29 UTC30m
2026-07-17 N733HT - Jul 17, 18:05 UTCJul 17, 19:15 UTC1h 10m
2026-07-17 N733HT CLL → CLL Jul 17, 02:30 UTCJul 17, 05:15 UTC2h 45m
2026-07-16 N733HT CLL → CLL Jul 16, 17:45 UTCJul 16, 18:44 UTC1h 0m
2026-07-16 N733HT CLL → CLL Jul 16, 15:55 UTCJul 16, 16:19 UTC25m
2026-07-16 N733HT CLL → CLL Jul 16, 14:20 UTCJul 16, 14:35 UTC15m
2026-07-16 N733HT - Jul 16, 13:49 UTCJul 16, 14:05 UTC15m
2026-07-15 N733HT - Jul 15, 23:55 UTCJul 16, 00:55 UTC1h 0m
2026-07-15 N733HT - Jul 15, 21:35 UTCJul 15, 23:05 UTC1h 30m
2026-07-15 N733HT - Jul 15, 19:40 UTCJul 15, 20:45 UTC1h 5m
2026-07-15 N733HT CLL → CLL Jul 15, 13:45 UTCJul 15, 14:40 UTC55m
2026-07-13 N733HT CLL → CLL Jul 13, 04:45 UTCJul 13, 05:01 UTC15m
2026-07-12 N733HT CLL → CLL Jul 12, 00:01 UTCJul 12, 01:00 UTC1h 0m
2026-07-11 N733HT CLL → CLL Jul 11, 21:20 UTCJul 11, 22:15 UTC55m
2026-07-11 N733HT - Jul 11, 15:25 UTCJul 11, 16:00 UTC35m
2026-07-10 N733HT - Jul 10, 19:00 UTCJul 10, 19:55 UTC55m
2026-07-10 N733HT CLL → CLL Jul 10, 15:40 UTCJul 10, 16:50 UTC1h 10m
2026-07-10 N733HT - Jul 10, 13:20 UTCJul 10, 13:55 UTC35m
2026-07-09 N733HT CLL → CLL Jul 9, 23:45 UTCJul 10, 00:40 UTC55m
2026-07-09 N733HT CLL → CLL Jul 9, 19:40 UTCJul 9, 21:00 UTC1h 20m
2026-07-08 N733HT CLL → CLL Jul 8, 23:40 UTCJul 9, 00:25 UTC45m
2026-07-08 N733HT CLL → CLL Jul 8, 19:45 UTCJul 8, 20:40 UTC55m
2026-07-08 N733HT - Jul 8, 16:35 UTCJul 8, 17:40 UTC1h 5m
2026-07-07 N733HT - Jul 7, 21:40 UTCJul 7, 22:35 UTC55m
2026-07-07 N733HT - Jul 7, 19:05 UTCJul 7, 20:50 UTC1h 45m
2026-07-07 N733HT - Jul 7, 14:35 UTCJul 7, 16:45 UTC2h 10m
2026-07-06 N733HT - Jul 6, 23:50 UTCJul 7, 00:00 UTC10m
2026-07-06 N733HT - Jul 6, 22:40 UTCJul 6, 22:50 UTC10m
2026-07-06 N733HT - Jul 6, 19:40 UTCJul 6, 19:50 UTC10m
2026-07-06 N733HT - Jul 6, 18:40 UTCJul 6, 18:50 UTC10m
2026-07-05 N733HT - Jul 5, 23:00 UTCJul 5, 23:50 UTC50m
2026-07-02 N733HT - Jul 2, 02:35 UTCJul 2, 05:05 UTC2h 30m
2026-07-02 N733HT - Jul 2, 00:10 UTCJul 2, 00:35 UTC25m
2026-07-01 N733HT - Jul 1, 22:30 UTCJul 1, 23:10 UTC40m
2026-07-01 N733HT - Jul 1, 21:25 UTCJul 1, 21:35 UTC10m

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 N733HT page for operator, model, and routing details .

Mode-S A9D6F1 frequently asked

What is Mode-S code A9D6F1?
A9D6F1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N733HT.
Where is Mode-S A9D6F1 registered?
Mode-S code A9D6F1 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 A9D6F1 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D6F1, octal 52353361, decimal 11,130,609.
What flights does A9D6F1 operate?
Mode-S A9D6F1 has broadcast 1 distinct callsign, including N733HT.