Apparatus

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sensors Mode-S transponder

A9ECC7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N739DB · CESSNA 172 Skyhawk · operated by MELBOURNE FLIGHT TRAINING LLC

Hex
A9ECC7
Octal
52366307
Decimal
11,136,199
Country
US
Tail
N739DB
Type
C172
No current signal · last broadcast 3d ago
Flights observed
134
Distinct callsigns
1
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A9ECC7.

Country allocation

The ICAO 24-bit address A9ECC7 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
N739DB - 134 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N739DB - Jul 14, 19:55 UTCJul 14, 21:00 UTC1h 5m
2026-07-14 N739DB - Jul 14, 16:10 UTCJul 14, 17:35 UTC1h 25m
2026-07-14 N739DB - Jul 14, 13:40 UTCJul 14, 14:45 UTC1h 5m
2026-07-14 N739DB - Jul 14, 11:40 UTCJul 14, 12:45 UTC1h 5m
2026-07-14 N739DB - Jul 14, 01:30 UTCJul 14, 02:25 UTC55m
2026-07-13 N739DB MLB → MLB Jul 13, 20:35 UTCJul 13, 21:40 UTC1h 5m
2026-07-13 N739DB - Jul 13, 17:20 UTCJul 13, 19:15 UTC1h 55m
2026-07-13 N739DB - Jul 13, 14:00 UTCJul 13, 16:10 UTC2h 10m
2026-07-13 N739DB - Jul 13, 11:25 UTCJul 13, 12:35 UTC1h 10m
2026-07-12 N739DB - Jul 12, 19:40 UTCJul 12, 20:01 UTC20m
2026-07-12 N739DB MLB → MLB Jul 12, 15:35 UTCJul 12, 16:50 UTC1h 15m
2026-07-12 N739DB - Jul 12, 13:40 UTCJul 12, 14:50 UTC1h 10m
2026-07-11 N739DB - Jul 11, 17:40 UTCJul 11, 18:50 UTC1h 10m
2026-07-11 N739DB - Jul 11, 15:55 UTCJul 11, 16:55 UTC1h 0m
2026-07-11 N739DB - Jul 11, 14:05 UTCJul 11, 15:00 UTC55m
2026-07-11 N739DB - Jul 11, 11:40 UTCJul 11, 12:50 UTC1h 10m
2026-07-10 N739DB - Jul 10, 22:20 UTCJul 10, 23:55 UTC1h 35m
2026-07-10 N739DB MLB → MLB Jul 10, 17:20 UTCJul 10, 18:55 UTC1h 35m
2026-07-10 N739DB MLB → MLB Jul 10, 13:35 UTCJul 10, 14:50 UTC1h 15m
2026-07-10 N739DB - Jul 10, 01:40 UTCJul 10, 03:05 UTC1h 25m
2026-07-09 N739DB - Jul 9, 19:00 UTCJul 9, 19:25 UTC25m
2026-07-09 N739DB - Jul 9, 16:40 UTCJul 9, 17:45 UTC1h 5m
2026-07-09 N739DB - Jul 9, 14:10 UTCJul 9, 15:15 UTC1h 5m
2026-07-09 N739DB - Jul 9, 11:35 UTCJul 9, 12:25 UTC50m
2026-07-08 N739DB - Jul 8, 21:45 UTCJul 9, 00:15 UTC2h 30m
2026-07-08 N739DB MLB → MLB Jul 8, 17:45 UTCJul 8, 18:40 UTC55m
2026-07-08 N739DB - Jul 8, 15:40 UTCJul 8, 17:00 UTC1h 20m
2026-07-08 N739DB - Jul 8, 11:05 UTCJul 8, 12:30 UTC1h 25m
2026-07-07 N739DB - Jul 7, 20:45 UTCJul 7, 22:10 UTC1h 25m
2026-07-07 N739DB - Jul 7, 18:35 UTCJul 7, 19:40 UTC1h 5m
2026-07-07 N739DB - Jul 7, 17:00 UTCJul 7, 17:40 UTC40m
2026-07-07 N739DB - Jul 7, 14:35 UTCJul 7, 16:00 UTC1h 25m
2026-07-07 N739DB MLB → MLB Jul 7, 11:20 UTCJul 7, 12:45 UTC1h 25m
2026-07-06 N739DB - Jul 6, 15:35 UTCJul 6, 18:25 UTC2h 50m
2026-07-06 N739DB - Jul 6, 13:05 UTCJul 6, 14:40 UTC1h 35m
2026-07-05 N739DB - Jul 5, 19:10 UTCJul 5, 20:25 UTC1h 15m
2026-07-05 N739DB - Jul 5, 16:30 UTCJul 5, 16:55 UTC25m
2026-07-05 N739DB - Jul 5, 14:15 UTCJul 5, 14:45 UTC30m
2026-07-05 N739DB - Jul 5, 11:45 UTCJul 5, 12:40 UTC55m
2026-07-04 N739DB - Jul 4, 15:45 UTCJul 4, 16:50 UTC1h 5m
2026-07-04 N739DB - Jul 4, 13:35 UTCJul 4, 14:45 UTC1h 10m
2026-07-03 N739DB - Jul 3, 20:30 UTCJul 3, 22:05 UTC1h 35m
2026-07-03 N739DB - Jul 3, 17:55 UTCJul 3, 18:50 UTC55m
2026-07-02 N739DB - Jul 2, 16:35 UTCJul 2, 17:50 UTC1h 15m
2026-07-02 N739DB - Jul 2, 14:20 UTCJul 2, 15:40 UTC1h 20m
2026-07-01 N739DB - Jul 1, 18:35 UTCJul 1, 19:40 UTC1h 5m
2026-07-01 N739DB - Jul 1, 16:15 UTCJul 1, 16:25 UTC10m
2026-07-01 N739DB - Jul 1, 00:35 UTCJul 1, 01:30 UTC55m
2026-06-30 N739DB - Jun 30, 15:55 UTCJun 30, 17:20 UTC1h 25m
2026-06-30 N739DB - Jun 30, 13:25 UTCJun 30, 14:25 UTC1h 0m

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 N739DB page for operator, model, and routing details .

Mode-S A9ECC7 frequently asked

What is Mode-S code A9ECC7?
A9ECC7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N739DB.
Where is Mode-S A9ECC7 registered?
Mode-S code A9ECC7 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 A9ECC7 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9ECC7, octal 52366307, decimal 11,136,199.
What flights does A9ECC7 operate?
Mode-S A9ECC7 has broadcast 1 distinct callsign, including N739DB.