Apparatus

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sensors Mode-S transponder

A09D14

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N139ER · CESSNA 172 Skyhawk · operated by RICK AVIATION INC

Hex
A09D14
Octal
50116424
Decimal
10,525,972
Country
US
Tail
N139ER
Type
C172
No current signal · last broadcast 6h ago
Flights observed
106
Distinct callsigns
1
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A09D14.

Country allocation

The ICAO 24-bit address A09D14 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
N139ER - 105 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N139ER - Jul 14, 16:05 UTCJul 14, 16:20 UTC15m
2026-07-13 N139ER - Jul 13, 23:05 UTCJul 13, 23:50 UTC45m
2026-07-11 N139ER - Jul 11, 16:45 UTCJul 11, 16:55 UTC10m
2026-07-10 N139ER - Jul 10, 23:25 UTCJul 10, 23:45 UTC20m
2026-07-08 N139ER - Jul 8, 23:20 UTCJul 9, 00:20 UTC1h 0m
2026-07-08 N139ER - Jul 8, 21:30 UTCJul 8, 22:15 UTC45m
2026-07-03 N139ER PHF → PHF Jul 3, 17:10 UTCJul 3, 18:10 UTC1h 0m
2026-07-03 N139ER - Jul 3, 02:40 UTCJul 3, 02:55 UTC15m
2026-07-03 N139ER - Jul 3, 01:35 UTCJul 3, 01:50 UTC15m
2026-07-01 N139ER - Jul 1, 17:10 UTCJul 1, 17:55 UTC45m
2026-07-01 N139ER PHF → PHF Jul 1, 11:45 UTCJul 1, 12:25 UTC40m
2026-07-01 N139ER - Jul 1, 00:30 UTCJul 1, 00:40 UTC10m
2026-06-30 N139ER - Jun 30, 21:15 UTCJun 30, 21:40 UTC25m
2026-06-30 - - Jun 30, 15:35 UTCJun 30, 15:50 UTC15m
2026-06-29 N139ER - Jun 29, 17:30 UTCJun 29, 18:25 UTC55m
2026-06-25 N139ER - Jun 25, 15:54 UTCJun 25, 16:09 UTC15m
2026-06-25 N139ER - Jun 25, 14:20 UTCJun 25, 14:55 UTC35m
2026-06-24 N139ER - Jun 24, 18:15 UTCJun 24, 18:25 UTC10m
2026-06-24 N139ER - Jun 24, 17:10 UTCJun 24, 17:34 UTC25m
2026-06-24 N139ER - Jun 24, 14:55 UTCJun 24, 15:54 UTC1h 0m
2026-06-22 N139ER - Jun 22, 17:04 UTCJun 22, 17:44 UTC40m
2026-06-21 N139ER - Jun 21, 20:09 UTCJun 21, 21:29 UTC1h 20m
2026-06-20 N139ER - Jun 20, 14:35 UTCJun 20, 15:54 UTC1h 20m
2026-06-18 N139ER - Jun 18, 15:30 UTCJun 18, 16:15 UTC45m
2026-06-17 N139ER - Jun 17, 21:25 UTCJun 17, 21:50 UTC25m
2026-06-17 N139ER - Jun 17, 20:05 UTCJun 17, 20:40 UTC35m
2026-06-17 N139ER - Jun 17, 17:05 UTCJun 17, 17:45 UTC40m
2026-06-16 N139ER - Jun 16, 20:00 UTCJun 16, 21:10 UTC1h 10m
2026-06-15 N139ER - Jun 15, 17:15 UTCJun 15, 17:50 UTC35m
2026-06-15 N139ER - Jun 15, 11:15 UTCJun 15, 11:30 UTC15m
2026-06-15 N139ER - Jun 15, 10:20 UTCJun 15, 10:45 UTC25m
2026-06-13 N139ER PHF → PHF Jun 13, 23:40 UTCJun 14, 00:45 UTC1h 5m
2026-06-13 N139ER - Jun 13, 17:55 UTCJun 13, 18:25 UTC30m
2026-06-13 N139ER - Jun 13, 14:50 UTCJun 13, 15:20 UTC30m
2026-06-12 N139ER - Jun 12, 17:55 UTCJun 12, 18:10 UTC15m
2026-06-11 N139ER - Jun 11, 20:00 UTCJun 11, 20:45 UTC45m
2026-06-11 N139ER - Jun 11, 17:25 UTCJun 11, 18:10 UTC45m
2026-06-11 N139ER - Jun 11, 13:05 UTCJun 11, 14:00 UTC55m
2026-06-10 N139ER PHF → PHF Jun 10, 19:40 UTCJun 10, 20:20 UTC40m
2026-06-10 N139ER - Jun 10, 13:50 UTCJun 10, 14:15 UTC25m
2026-06-09 N139ER - Jun 9, 14:35 UTCJun 9, 15:45 UTC1h 10m
2026-06-07 N139ER - Jun 7, 16:15 UTCJun 7, 17:15 UTC1h 0m
2026-06-06 N139ER - Jun 6, 17:00 UTCJun 6, 17:19 UTC20m
2026-06-06 N139ER - Jun 6, 16:10 UTCJun 6, 16:20 UTC10m
2026-06-06 N139ER - Jun 6, 13:54 UTCJun 6, 14:54 UTC1h 0m
2026-06-06 N139ER - Jun 6, 00:25 UTCJun 6, 00:35 UTC10m
2026-06-05 N139ER - Jun 5, 23:30 UTCJun 5, 23:55 UTC25m
2026-06-05 N139ER - Jun 5, 15:55 UTCJun 5, 16:05 UTC10m
2026-06-05 N139ER - Jun 5, 10:40 UTCJun 5, 11:40 UTC1h 0m
2026-06-04 N139ER - Jun 4, 19:00 UTCJun 4, 19:55 UTC55m

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 N139ER page for operator, model, and routing details .

Mode-S A09D14 frequently asked

What is Mode-S code A09D14?
A09D14 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N139ER.
Where is Mode-S A09D14 registered?
Mode-S code A09D14 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 A09D14 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A09D14, octal 50116424, decimal 10,525,972.
What flights does A09D14 operate?
Mode-S A09D14 has broadcast 1 distinct callsign, including N139ER.