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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 Jul 26, 20:45 UTC
Flights observed
272
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 20:45 UTC

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 - 272 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N739HP - Jul 26, 20:10 UTCJul 26, 20:45 UTC35m
2026-07-26 N739HP - Jul 26, 18:40 UTCJul 26, 19:15 UTC35m
2026-07-24 N739HP KOA → KOA Jul 24, 18:30 UTCJul 24, 19:50 UTC1h 20m
2026-07-24 N739HP - Jul 24, 06:30 UTCJul 24, 07:00 UTC30m
2026-07-24 N739HP KOA → KOA Jul 24, 06:10 UTCJul 24, 06:25 UTC15m
2026-07-24 N739HP - Jul 24, 00:40 UTCJul 24, 01:20 UTC40m
2026-07-23 N739HP - Jul 23, 23:40 UTCJul 23, 23:50 UTC10m
2026-07-23 N739HP - Jul 23, 17:50 UTCJul 23, 18:35 UTC45m
2026-07-23 N739HP KOA → KOA Jul 23, 04:20 UTCJul 23, 04:55 UTC35m
2026-07-23 N739HP - Jul 23, 02:50 UTCJul 23, 02:55 UTC5m
2026-07-23 N739HP KOA → KOA Jul 23, 01:25 UTCJul 23, 01:50 UTC25m
2026-07-23 N739HP - Jul 23, 00:40 UTCJul 23, 00:50 UTC10m
2026-07-22 N739HP - Jul 22, 23:50 UTCJul 23, 00:10 UTC20m
2026-07-22 N739HP - Jul 22, 22:25 UTCJul 22, 22:35 UTC10m
2026-07-22 N739HP - Jul 22, 20:55 UTCJul 22, 21:10 UTC15m
2026-07-22 N739HP - Jul 22, 19:00 UTCJul 22, 19:25 UTC25m
2026-07-22 N739HP - Jul 22, 18:00 UTCJul 22, 18:10 UTC10m
2026-07-22 N739HP KOA → KOA Jul 22, 00:30 UTCJul 22, 01:05 UTC35m
2026-07-21 N739HP KOA → KOA Jul 21, 22:15 UTCJul 21, 22:55 UTC40m
2026-07-21 N739HP - Jul 21, 21:05 UTCJul 21, 21:10 UTC5m
2026-07-21 N739HP - Jul 21, 07:20 UTCJul 21, 07:35 UTC15m
2026-07-21 N739HP - Jul 21, 06:50 UTCJul 21, 07:15 UTC25m
2026-07-21 N739HP KOA → KOA Jul 21, 06:05 UTCJul 21, 06:45 UTC40m
2026-07-21 N739HP - Jul 21, 03:20 UTCJul 21, 04:00 UTC40m
2026-07-21 N739HP - Jul 21, 02:20 UTCJul 21, 02:25 UTC5m
2026-07-20 N739HP KOA → KOA Jul 20, 20:40 UTCJul 20, 21:30 UTC50m
2026-07-20 N739HP - Jul 20, 19:45 UTCJul 20, 20:10 UTC25m
2026-07-20 N739HP - Jul 20, 18:20 UTCJul 20, 18:30 UTC10m
2026-07-18 N739HP - Jul 18, 23:25 UTCJul 18, 23:35 UTC10m
2026-07-18 N739HP - Jul 18, 22:25 UTCJul 18, 22:45 UTC20m
2026-07-18 N739HP KOA → KOA Jul 18, 21:30 UTCJul 18, 21:50 UTC20m
2026-07-18 N739HP - Jul 18, 20:45 UTCJul 18, 20:50 UTC5m
2026-07-16 N739HP KOA → KOA Jul 16, 22:15 UTCJul 16, 22:49 UTC35m
2026-07-16 N739HP KOA → KOA Jul 16, 17:30 UTCJul 16, 18:44 UTC1h 15m
2026-07-16 N739HP - Jul 16, 00:15 UTCJul 16, 00:35 UTC20m
2026-07-15 N739HP - Jul 15, 22:30 UTCJul 15, 22:40 UTC10m
2026-07-15 N739HP KOA → KOA Jul 15, 19:35 UTCJul 15, 20:35 UTC1h 0m
2026-07-15 N739HP KOA → KOA Jul 15, 18:00 UTCJul 15, 18:50 UTC50m
2026-07-15 N739HP KOA → KOA Jul 15, 03:40 UTCJul 15, 03:55 UTC15m
2026-07-15 N739HP - Jul 15, 03:20 UTCJul 15, 03:35 UTC15m
2026-07-15 N739HP - Jul 15, 02:25 UTCJul 15, 02:35 UTC10m
2026-07-15 N739HP - Jul 15, 00:25 UTCJul 15, 00:55 UTC30m
2026-07-14 N739HP - Jul 14, 23:20 UTCJul 14, 23:30 UTC10m
2026-07-14 N739HP KOA → KOA Jul 14, 22:05 UTCJul 14, 22:30 UTC25m
2026-07-14 N739HP - Jul 14, 20:50 UTCJul 14, 21:20 UTC30m
2026-07-14 N739HP - Jul 14, 18:55 UTCJul 14, 19:25 UTC30m
2026-07-14 N739HP - Jul 14, 18:15 UTCJul 14, 18:45 UTC30m
2026-07-14 N739HP - Jul 14, 17:35 UTCJul 14, 17:45 UTC10m
2026-07-14 N739HP KOA → KOA Jul 14, 01:50 UTCJul 14, 02:10 UTC20m
2026-07-14 N739HP - Jul 14, 01:00 UTCJul 14, 01:05 UTC5m

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 Jul 26, 20:45 UTC.
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.