Apparatus

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sensors Mode-S transponder

A9E9FB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N738NM · CESSNA 172 Skyhawk · operated by SPRING CITY AVIATION INC

Hex
A9E9FB
Octal
52364773
Decimal
11,135,483
Country
US
Tail
N738NM
Type
C172
No current signal · last broadcast 2d ago
Flights observed
223
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A9E9FB.

Country allocation

The ICAO 24-bit address A9E9FB 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
N738NM - 222 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N738NM - Jul 15, 18:45 UTCJul 15, 21:00 UTC2h 15m
2026-07-15 N738NM - Jul 15, 15:20 UTCJul 15, 16:40 UTC1h 20m
2026-07-15 N738NM - Jul 15, 13:45 UTCJul 15, 14:35 UTC50m
2026-07-14 N738NM - Jul 14, 21:30 UTCJul 14, 22:05 UTC35m
2026-07-14 N738NM - Jul 14, 17:35 UTCJul 14, 18:25 UTC50m
2026-07-14 N738NM - Jul 14, 15:15 UTCJul 14, 16:45 UTC1h 30m
2026-07-14 N738NM - Jul 14, 13:20 UTCJul 14, 14:25 UTC1h 5m
2026-07-13 N738NM - Jul 13, 19:40 UTCJul 13, 20:40 UTC1h 0m
2026-07-13 N738NM - Jul 13, 17:30 UTCJul 13, 18:20 UTC50m
2026-07-13 N738NM - Jul 13, 15:40 UTCJul 13, 16:40 UTC1h 0m
2026-07-13 N738NM - Jul 13, 13:35 UTCJul 13, 14:30 UTC55m
2026-07-12 N738NM - Jul 12, 18:30 UTCJul 12, 20:01 UTC1h 30m
2026-07-12 N738NM - Jul 12, 17:15 UTCJul 12, 17:55 UTC40m
2026-07-12 N738NM - Jul 12, 16:01 UTCJul 12, 16:35 UTC35m
2026-07-12 N738NM - Jul 12, 13:35 UTCJul 12, 14:25 UTC50m
2026-07-11 N738NM - Jul 11, 23:35 UTCJul 12, 00:50 UTC1h 15m
2026-07-11 N738NM - Jul 11, 15:45 UTCJul 11, 16:05 UTC20m
2026-07-11 N738NM - Jul 11, 13:20 UTCJul 11, 14:00 UTC40m
2026-07-10 N738NM - Jul 10, 21:45 UTCJul 10, 22:50 UTC1h 5m
2026-07-10 N738NM - Jul 10, 19:40 UTCJul 10, 20:55 UTC1h 15m
2026-07-10 N738NM - Jul 10, 18:10 UTCJul 10, 19:00 UTC50m
2026-07-10 N738NM - Jul 10, 15:50 UTCJul 10, 16:40 UTC50m
2026-07-10 N738NM - Jul 10, 13:30 UTCJul 10, 15:00 UTC1h 30m
2026-07-09 N738NM - Jul 9, 22:00 UTCJul 9, 23:00 UTC1h 0m
2026-07-09 N738NM - Jul 9, 16:10 UTCJul 9, 16:35 UTC25m
2026-07-08 N738NM - Jul 8, 17:35 UTCJul 8, 18:35 UTC1h 0m
2026-07-08 N738NM - Jul 8, 15:55 UTCJul 8, 16:40 UTC45m
2026-07-08 N738NM - Jul 8, 15:15 UTCJul 8, 15:25 UTC10m
2026-07-08 N738NM - Jul 8, 13:20 UTCJul 8, 14:40 UTC1h 20m
2026-07-07 N738NM - Jul 7, 20:20 UTCJul 7, 21:15 UTC55m
2026-07-07 N738NM - Jul 7, 17:05 UTCJul 7, 18:25 UTC1h 20m
2026-07-07 N738NM - Jul 7, 15:40 UTCJul 7, 16:25 UTC45m
2026-07-07 N738NM - Jul 7, 03:15 UTCJul 7, 04:10 UTC55m
2026-07-06 N738NM - Jul 6, 17:15 UTCJul 6, 18:55 UTC1h 40m
2026-07-06 N738NM - Jul 6, 12:50 UTCJul 6, 14:45 UTC1h 55m
2026-07-02 N738NM - Jul 2, 19:05 UTCJul 2, 20:15 UTC1h 10m
2026-07-02 N738NM - Jul 2, 17:35 UTCJul 2, 18:30 UTC55m
2026-07-02 N738NM - Jul 2, 13:30 UTCJul 2, 14:00 UTC30m
2026-07-01 N738NM - Jul 1, 16:05 UTCJul 1, 17:10 UTC1h 5m
2026-06-30 N738NM - Jun 30, 23:40 UTCJul 1, 00:10 UTC30m
2026-06-30 N738NM - Jun 30, 20:25 UTCJun 30, 20:50 UTC25m
2026-06-30 N738NM - Jun 30, 17:20 UTCJun 30, 19:50 UTC2h 30m
2026-06-29 N738NM - Jun 29, 17:49 UTCJun 29, 18:34 UTC45m
2026-06-29 N738NM - Jun 29, 15:45 UTCJun 29, 16:39 UTC55m
2026-06-27 N738NM - Jun 27, 19:29 UTCJun 27, 20:19 UTC50m
2026-06-27 N738NM - Jun 27, 17:20 UTCJun 27, 18:09 UTC50m
2026-06-27 N738NM - Jun 27, 15:34 UTCJun 27, 16:39 UTC1h 5m
2026-06-27 N738NM - Jun 27, 14:00 UTCJun 27, 14:25 UTC25m
2026-06-26 N738NM - Jun 26, 18:34 UTCJun 26, 19:55 UTC1h 20m
2026-06-26 N738NM - Jun 26, 16:35 UTCJun 26, 16:54 UTC20m

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 N738NM page for operator, model, and routing details .

Mode-S A9E9FB frequently asked

What is Mode-S code A9E9FB?
A9E9FB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N738NM.
Where is Mode-S A9E9FB registered?
Mode-S code A9E9FB 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 A9E9FB 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 A9E9FB, octal 52364773, decimal 11,135,483.
What flights does A9E9FB operate?
Mode-S A9E9FB has broadcast 1 distinct callsign, including N738NM.