Apparatus

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sensors Mode-S transponder

A3EF25

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3524F · CESSNA TR182 Turbo Skylane RG · operated by HILL FLYING CLUB INC

Hex
A3EF25
Octal
50767445
Decimal
10,743,589
Country
US
Tail
N3524F
Type
C82T
No current signal · last broadcast Jul 26, 19:50 UTC
Flights observed
124
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 19:50 UTC

Last known position

Most recent position reported by Mode-S A3EF25.

Country allocation

The ICAO 24-bit address A3EF25 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
N3524F - 124 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N3524F - Jul 26, 19:10 UTCJul 26, 19:50 UTC40m
2026-07-26 N3524F - Jul 26, 17:40 UTCJul 26, 17:55 UTC15m
2026-07-25 N3524F - Jul 25, 15:00 UTCJul 25, 16:20 UTC1h 20m
2026-07-21 N3524F OGD → OGD Jul 21, 14:55 UTCJul 21, 16:20 UTC1h 25m
2026-07-18 N3524F - Jul 18, 14:25 UTCJul 18, 15:25 UTC1h 0m
2026-07-17 N3524F - Jul 17, 17:55 UTCJul 17, 18:44 UTC50m
2026-07-16 N3524F - Jul 16, 15:45 UTCJul 16, 16:19 UTC35m
2026-07-15 N3524F - Jul 15, 14:15 UTCJul 15, 15:00 UTC45m
2026-07-14 N3524F - Jul 14, 22:55 UTCJul 14, 23:25 UTC30m
2026-07-14 N3524F - Jul 14, 17:20 UTCJul 14, 17:50 UTC30m
2026-07-14 N3524F OGD → OGD Jul 14, 12:45 UTCJul 14, 13:50 UTC1h 5m
2026-07-13 N3524F OGD → OGD Jul 13, 16:50 UTCJul 13, 18:00 UTC1h 10m
2026-07-13 N3524F - Jul 13, 14:55 UTCJul 13, 15:30 UTC35m
2026-07-12 N3524F - Jul 12, 14:40 UTCJul 12, 15:25 UTC45m
2026-07-05 N3524F - Jul 5, 04:00 UTCJul 5, 04:25 UTC25m
2026-07-02 N3524F - Jul 2, 17:50 UTCJul 2, 18:15 UTC25m
2026-07-02 N3524F - Jul 2, 16:40 UTCJul 2, 16:55 UTC15m
2026-06-30 N3524F - Jun 30, 21:15 UTCJun 30, 21:40 UTC25m
2026-06-30 N3524F - Jun 30, 19:50 UTCJun 30, 20:30 UTC40m
2026-06-30 N3524F - Jun 30, 16:25 UTCJun 30, 17:15 UTC50m
2026-06-30 N3524F - Jun 30, 14:00 UTCJun 30, 15:10 UTC1h 10m
2026-06-28 N3524F - Jun 28, 17:50 UTCJun 28, 18:40 UTC50m
2026-06-24 N3524F - Jun 24, 19:55 UTCJun 24, 20:09 UTC15m
2026-06-24 N3524F - Jun 24, 18:15 UTCJun 24, 19:24 UTC1h 10m
2026-06-24 N3524F OGD → BTF Jun 24, 16:24 UTCJun 24, 16:40 UTC15m
2026-06-24 N3524F OGD → OGD Jun 24, 01:34 UTCJun 24, 04:30 UTC2h 55m
2026-06-23 N3524F - Jun 23, 19:39 UTCJun 23, 20:49 UTC1h 10m
2026-06-22 N3524F - Jun 22, 16:05 UTCJun 22, 16:34 UTC30m
2026-06-19 N3524F - Jun 19, 17:34 UTCJun 19, 17:59 UTC25m
2026-06-19 N3524F - Jun 19, 12:54 UTCJun 19, 13:20 UTC25m
2026-06-19 N3524F OGD → OGD Jun 19, 01:50 UTCJun 19, 03:05 UTC1h 15m
2026-06-18 N3524F - Jun 18, 19:05 UTCJun 18, 19:15 UTC10m
2026-06-18 N3524F - Jun 18, 18:10 UTCJun 18, 18:20 UTC10m
2026-06-18 N3524F - Jun 18, 06:10 UTCJun 18, 06:35 UTC25m
2026-06-18 N3524F - Jun 18, 05:15 UTCJun 18, 05:40 UTC25m
2026-06-17 N3524F - Jun 17, 01:05 UTCJun 17, 01:35 UTC30m
2026-06-16 N3524F - Jun 16, 21:55 UTCJun 16, 23:00 UTC1h 5m
2026-06-16 N3524F - Jun 16, 20:15 UTCJun 16, 21:00 UTC45m
2026-06-16 N3524F - Jun 16, 15:30 UTCJun 16, 16:05 UTC35m
2026-06-15 N3524F - Jun 15, 22:05 UTCJun 15, 22:25 UTC20m
2026-06-15 N3524F - Jun 15, 20:25 UTCJun 15, 22:00 UTC1h 35m
2026-06-15 N3524F - Jun 15, 19:10 UTCJun 15, 19:30 UTC20m
2026-06-15 N3524F - Jun 15, 15:59 UTCJun 15, 17:20 UTC1h 20m
2026-06-15 N3524F - Jun 15, 00:45 UTCJun 15, 01:04 UTC20m
2026-06-14 N3524F - Jun 14, 23:44 UTCJun 15, 00:15 UTC30m
2026-06-14 N3524F - Jun 14, 22:50 UTCJun 14, 23:39 UTC50m
2026-06-14 N3524F - Jun 14, 21:55 UTCJun 14, 22:15 UTC20m
2026-06-13 N3524F - Jun 13, 16:10 UTCJun 13, 17:05 UTC55m
2026-06-13 N3524F - Jun 13, 14:15 UTCJun 13, 14:35 UTC20m
2026-06-12 N3524F - Jun 12, 19:25 UTCJun 12, 20:35 UTC1h 10m

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 N3524F page for operator, model, and routing details .

Mode-S A3EF25 frequently asked

What is Mode-S code A3EF25?
A3EF25 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3524F.
Where is Mode-S A3EF25 registered?
Mode-S code A3EF25 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 A3EF25 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3EF25, octal 50767445, decimal 10,743,589.
What flights does A3EF25 operate?
Mode-S A3EF25 has broadcast 1 distinct callsign, including N3524F.