Apparatus

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sensors Mode-S transponder

A9ED37

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N739HP · CESSNA 172 Skyhawk · operated by HAWAII PACIFIC AVIATION INC

Hex
A9ED37
Octal
52366467
Decimal
11,136,311
Country
US
Tail
N739HP
Type
C172
No current signal · last broadcast 8h ago
Flights observed
94
Distinct callsigns
1
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A9ED37.

Country allocation

The ICAO 24-bit address A9ED37 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
N739HP - 94 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 N739HP - May 30, 01:20 UTCMay 30, 01:40 UTC20m
2026-05-29 N739HP - May 29, 22:10 UTCMay 29, 22:25 UTC15m
2026-05-29 N739HP - May 29, 21:10 UTCMay 29, 21:20 UTC10m
2026-05-28 N739HP KOA → KOA May 28, 22:35 UTCMay 28, 23:10 UTC35m
2026-05-28 N739HP KOA → KOA May 28, 21:00 UTCMay 28, 21:20 UTC20m
2026-05-28 N739HP KOA → KOA May 28, 03:00 UTCMay 28, 04:00 UTC1h 0m
2026-05-28 N739HP KOA → KOA May 28, 02:00 UTCMay 28, 02:45 UTC45m
2026-05-27 N739HP KOA → KOA May 27, 19:00 UTCMay 27, 20:45 UTC1h 45m
2026-05-25 N739HP KOA → KOA May 25, 21:09 UTCMay 25, 21:49 UTC40m
2026-05-25 N739HP KOA → KOA May 25, 18:45 UTCMay 25, 19:40 UTC54m
2026-05-24 N739HP KOA → KOA May 24, 20:35 UTCMay 24, 21:15 UTC40m
2026-05-24 N739HP KOA → KOA May 24, 18:50 UTCMay 24, 19:35 UTC45m
2026-05-24 N739HP - May 24, 02:55 UTCMay 24, 03:05 UTC10m
2026-05-24 N739HP - May 24, 02:05 UTCMay 24, 02:15 UTC10m
2026-05-24 N739HP KOA → KOA May 24, 01:00 UTCMay 24, 01:15 UTC15m
2026-05-24 N739HP - May 24, 00:20 UTCMay 24, 00:30 UTC10m
2026-05-22 N739HP KOA → KOA May 22, 03:55 UTCMay 22, 04:25 UTC30m
2026-05-22 N739HP - May 22, 03:15 UTCMay 22, 03:25 UTC10m
2026-05-22 N739HP - May 22, 01:05 UTCMay 22, 02:20 UTC1h 15m
2026-05-21 N739HP KOA → KOA May 21, 22:30 UTCMay 21, 23:35 UTC1h 5m
2026-05-21 N739HP - May 21, 20:35 UTCMay 21, 20:45 UTC10m
2026-05-21 N739HP KOA → KOA May 21, 18:10 UTCMay 21, 18:55 UTC45m
2026-05-21 N739HP - May 21, 00:45 UTCMay 21, 01:05 UTC20m
2026-05-20 N739HP - May 20, 23:35 UTCMay 20, 23:45 UTC10m
2026-05-20 N739HP - May 20, 03:35 UTCMay 20, 04:20 UTC45m
2026-05-20 N739HP - May 20, 02:35 UTCMay 20, 02:45 UTC10m
2026-05-20 N739HP KOA → KOA May 20, 00:40 UTCMay 20, 01:50 UTC1h 10m
2026-05-19 N739HP KOA → KOA May 19, 23:05 UTCMay 19, 23:50 UTC45m
2026-05-19 N739HP KOA → KOA May 19, 02:40 UTCMay 19, 03:45 UTC1h 5m
2026-05-19 N739HP - May 19, 01:30 UTCMay 19, 01:50 UTC20m
2026-05-19 N739HP - May 19, 00:45 UTCMay 19, 00:55 UTC10m
2026-05-18 N739HP KOA → KOA May 18, 22:55 UTCMay 18, 23:45 UTC50m
2026-05-18 N739HP KOA → KOA May 18, 20:35 UTCMay 18, 21:15 UTC40m
2026-05-17 N739HP - May 17, 01:20 UTCMay 17, 01:30 UTC10m
2026-05-16 N739HP KOA → KOA May 16, 20:00 UTCMay 16, 20:50 UTC50m
2026-05-15 N739HP KOA → KOA May 15, 19:35 UTCMay 15, 20:00 UTC25m
2026-05-15 N739HP - May 15, 00:40 UTCMay 15, 02:05 UTC1h 25m
2026-05-14 N739HP - May 14, 23:45 UTCMay 15, 00:00 UTC15m
2026-05-14 N739HP - May 14, 23:00 UTCMay 14, 23:10 UTC10m
2026-05-14 N739HP - May 14, 20:40 UTCMay 14, 21:40 UTC1h 0m
2026-05-14 N739HP KOA → KOA May 14, 18:45 UTCMay 14, 19:25 UTC40m
2026-05-13 N739HP KOA → KOA May 13, 23:50 UTCMay 14, 00:20 UTC30m
2026-05-13 N739HP KOA → KOA May 13, 18:55 UTCMay 13, 19:50 UTC55m
2026-05-13 N739HP KOA → KOA May 13, 00:20 UTCMay 13, 00:50 UTC30m
2026-05-12 N739HP KOA → KOA May 12, 18:45 UTCMay 12, 19:45 UTC1h 0m
2026-05-11 N739HP - May 11, 21:30 UTCMay 11, 21:40 UTC10m
2026-05-11 N739HP - May 11, 20:30 UTCMay 11, 20:40 UTC10m
2026-05-11 N739HP - May 11, 01:20 UTCMay 11, 01:50 UTC30m
2026-05-11 N739HP - May 11, 00:05 UTCMay 11, 00:25 UTC20m
2026-05-10 N739HP - May 10, 17:30 UTCMay 10, 18:55 UTC1h 25m

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 N739HP page for operator, model, and routing details .

Mode-S A9ED37 frequently asked

What is Mode-S code A9ED37?
A9ED37 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N739HP.
Where is Mode-S A9ED37 registered?
Mode-S code A9ED37 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 A9ED37 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9ED37, octal 52366467, decimal 11,136,311.
What flights does A9ED37 operate?
Mode-S A9ED37 has broadcast 1 distinct callsign, including N739HP.