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sensors Mode-S transponder

A9B128

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N72306 · CESSNA T206 Turbo Stationair · operated by USDA APHIS PPQ

Hex
A9B128
Octal
52330450
Decimal
11,120,936
Country
US
Tail
N72306
Type
T206
No current signal · last broadcast 2h ago
Flights observed
151
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A9B128.

Country allocation

The ICAO 24-bit address A9B128 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
N72306 - 151 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N72306 - Jul 14, 14:00 UTCJul 14, 14:20 UTC20m
2026-07-14 N72306 - Jul 14, 12:15 UTCJul 14, 12:40 UTC25m
2026-07-13 N72306 - Jul 13, 13:55 UTCJul 13, 14:10 UTC15m
2026-07-13 N72306 - Jul 13, 12:05 UTCJul 13, 12:30 UTC25m
2026-07-11 N72306 - Jul 11, 13:20 UTCJul 11, 14:15 UTC55m
2026-07-11 N72306 - Jul 11, 12:15 UTCJul 11, 12:40 UTC25m
2026-07-10 N72306 - Jul 10, 13:55 UTCJul 10, 14:05 UTC10m
2026-07-10 N72306 - Jul 10, 12:10 UTCJul 10, 12:40 UTC30m
2026-07-09 N72306 - Jul 9, 13:55 UTCJul 9, 14:10 UTC15m
2026-07-09 N72306 - Jul 9, 12:10 UTCJul 9, 12:35 UTC25m
2026-07-08 N72306 - Jul 8, 14:20 UTCJul 8, 14:35 UTC15m
2026-07-08 N72306 - Jul 8, 12:35 UTCJul 8, 13:00 UTC25m
2026-07-07 N72306 - Jul 7, 14:00 UTCJul 7, 14:15 UTC15m
2026-07-07 N72306 - Jul 7, 12:15 UTCJul 7, 12:40 UTC25m
2026-07-06 N72306 - Jul 6, 14:10 UTCJul 6, 14:25 UTC15m
2026-07-06 N72306 - Jul 6, 12:20 UTCJul 6, 13:00 UTC40m
2026-07-04 N72306 - Jul 4, 14:15 UTCJul 4, 14:30 UTC15m
2026-07-04 N72306 - Jul 4, 12:30 UTCJul 4, 12:50 UTC20m
2026-07-03 N72306 - Jul 3, 14:15 UTCJul 3, 14:25 UTC10m
2026-07-03 N72306 - Jul 3, 12:25 UTCJul 3, 12:40 UTC15m
2026-07-02 N72306 - Jul 2, 14:15 UTCJul 2, 14:30 UTC15m
2026-07-02 N72306 - Jul 2, 12:30 UTCJul 2, 12:50 UTC20m
2026-07-01 N72306 - Jul 1, 13:50 UTCJul 1, 14:00 UTC10m
2026-07-01 N72306 - Jul 1, 12:00 UTCJul 1, 12:15 UTC15m
2026-06-30 N72306 - Jun 30, 13:50 UTCJun 30, 14:05 UTC15m
2026-06-30 N72306 - Jun 30, 12:05 UTCJun 30, 12:25 UTC20m
2026-06-29 N72306 - Jun 29, 13:49 UTCJun 29, 14:04 UTC15m
2026-06-29 N72306 - Jun 29, 12:05 UTCJun 29, 12:20 UTC15m
2026-06-27 N72306 - Jun 27, 13:55 UTCJun 27, 14:05 UTC10m
2026-06-27 N72306 - Jun 27, 12:04 UTCJun 27, 12:19 UTC15m
2026-06-26 N72306 - Jun 26, 13:45 UTCJun 26, 13:59 UTC15m
2026-06-26 N72306 - Jun 26, 12:00 UTCJun 26, 12:14 UTC15m
2026-06-25 N72306 - Jun 25, 13:55 UTCJun 25, 14:09 UTC15m
2026-06-25 N72306 - Jun 25, 12:04 UTCJun 25, 12:25 UTC20m
2026-06-24 N72306 - Jun 24, 13:54 UTCJun 24, 14:09 UTC15m
2026-06-24 N72306 - Jun 24, 13:10 UTCJun 24, 13:20 UTC10m
2026-06-24 N72306 - Jun 24, 12:04 UTCJun 24, 12:30 UTC25m
2026-06-23 N72306 - Jun 23, 13:34 UTCJun 23, 14:10 UTC35m
2026-06-23 N72306 - Jun 23, 12:05 UTCJun 23, 12:20 UTC15m
2026-06-22 N72306 - Jun 22, 14:10 UTCJun 22, 14:19 UTC10m
2026-06-22 N72306 - Jun 22, 12:19 UTCJun 22, 12:40 UTC20m
2026-06-20 N72306 - Jun 20, 13:59 UTCJun 20, 14:09 UTC10m
2026-06-20 N72306 - Jun 20, 12:04 UTCJun 20, 12:24 UTC20m
2026-06-19 N72306 - Jun 19, 13:54 UTCJun 19, 14:04 UTC10m
2026-06-19 N72306 - Jun 19, 11:59 UTCJun 19, 12:14 UTC15m
2026-06-18 N72306 - Jun 18, 14:01 UTCJun 18, 14:15 UTC15m
2026-06-18 N72306 - Jun 18, 12:10 UTCJun 18, 12:25 UTC15m
2026-06-17 N72306 - Jun 17, 14:05 UTCJun 17, 14:20 UTC15m
2026-06-17 N72306 - Jun 17, 12:15 UTCJun 17, 12:35 UTC20m
2026-06-16 N72306 - Jun 16, 14:05 UTCJun 16, 14:15 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 N72306 page for operator, model, and routing details .

Mode-S A9B128 frequently asked

What is Mode-S code A9B128?
A9B128 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N72306.
Where is Mode-S A9B128 registered?
Mode-S code A9B128 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 A9B128 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9B128, octal 52330450, decimal 11,120,936.
What flights does A9B128 operate?
Mode-S A9B128 has broadcast 1 distinct callsign, including N72306.