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sensors Mode-S transponder

A4F50F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4186N · PIPER PA-28-140/150/160/180 · operated by 86 AVIATION LLC

Hex
A4F50F
Octal
51172417
Decimal
10,810,639
Country
US
Tail
N4186N
Type
P28A
No current signal · last broadcast Jul 26, 20:30 UTC
Flights observed
72
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S A4F50F.

Country allocation

The ICAO 24-bit address A4F50F 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
N4186N - 72 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N4186N - Jul 26, 19:55 UTCJul 26, 20:30 UTC35m
2026-07-26 N4186N - Jul 26, 17:35 UTCJul 26, 18:10 UTC35m
2026-07-25 N4186N - Jul 25, 15:45 UTCJul 25, 18:00 UTC2h 15m
2026-07-25 N4186N - Jul 25, 12:15 UTCJul 25, 14:20 UTC2h 5m
2026-07-23 N4186N - Jul 23, 15:20 UTCJul 23, 17:30 UTC2h 10m
2026-07-23 N4186N - Jul 23, 12:20 UTCJul 23, 14:35 UTC2h 15m
2026-07-21 N4186N - Jul 21, 19:20 UTCJul 21, 20:10 UTC50m
2026-07-21 N4186N - Jul 21, 15:40 UTCJul 21, 17:40 UTC2h 0m
2026-07-20 N4186N - Jul 20, 23:40 UTCJul 21, 00:10 UTC30m
2026-07-20 N4186N - Jul 20, 20:55 UTCJul 20, 22:15 UTC1h 20m
2026-07-20 N4186N - Jul 20, 18:40 UTCJul 20, 20:20 UTC1h 40m
2026-07-20 N4186N - Jul 20, 00:25 UTCJul 20, 00:45 UTC20m
2026-07-19 N4186N - Jul 19, 21:45 UTCJul 19, 22:00 UTC15m
2026-07-18 N4186N - Jul 18, 14:50 UTCJul 18, 16:20 UTC1h 30m
2026-07-17 N4186N - Jul 17, 14:30 UTCJul 17, 15:44 UTC1h 15m
2026-07-16 N4186N - Jul 16, 17:45 UTCJul 16, 18:00 UTC15m
2026-07-16 N4186N - Jul 16, 15:55 UTCJul 16, 16:44 UTC50m
2026-07-12 N4186N - Jul 12, 15:55 UTCJul 12, 16:10 UTC15m
2026-07-12 N4186N - Jul 12, 13:15 UTCJul 12, 13:30 UTC15m
2026-06-28 N4186N - Jun 28, 16:19 UTCJun 28, 16:29 UTC10m
2026-06-28 N4186N - Jun 28, 13:45 UTCJun 28, 14:25 UTC40m
2026-06-27 N4186N - Jun 27, 15:34 UTCJun 27, 16:20 UTC45m
2026-06-25 N4186N - Jun 25, 14:29 UTCJun 25, 15:20 UTC50m
2026-06-24 N4186N - Jun 24, 23:00 UTCJun 24, 23:50 UTC50m
2026-06-23 N4186N - Jun 23, 22:19 UTCJun 23, 23:39 UTC1h 20m
2026-06-21 N4186N - Jun 21, 23:50 UTCJun 22, 00:24 UTC35m
2026-06-21 N4186N - Jun 21, 21:54 UTCJun 21, 22:20 UTC25m
2026-06-21 N4186N - Jun 21, 20:05 UTCJun 21, 20:14 UTC10m
2026-06-21 N4186N - Jun 21, 18:04 UTCJun 21, 18:20 UTC15m
2026-06-20 N4186N - Jun 20, 18:04 UTCJun 20, 18:14 UTC10m
2026-06-20 N4186N - Jun 20, 16:05 UTCJun 20, 16:24 UTC20m
2026-06-19 N4186N - Jun 19, 17:04 UTCJun 19, 18:14 UTC1h 10m
2026-06-18 N4186N - Jun 18, 21:15 UTCJun 18, 22:00 UTC45m
2026-06-18 N4186N - Jun 18, 20:30 UTCJun 18, 20:40 UTC10m
2026-06-13 N4186N - Jun 13, 18:20 UTCJun 13, 18:30 UTC10m
2026-06-12 N4186N - Jun 12, 16:40 UTCJun 12, 17:20 UTC40m
2026-06-07 N4186N - Jun 7, 23:50 UTCJun 8, 00:00 UTC10m
2026-06-07 N4186N - Jun 7, 21:55 UTCJun 7, 22:05 UTC10m
2026-06-07 N4186N - Jun 7, 16:35 UTCJun 7, 16:55 UTC20m
2026-06-07 N4186N - Jun 7, 14:15 UTCJun 7, 14:40 UTC25m
2026-06-06 N4186N - Jun 6, 22:05 UTCJun 6, 22:15 UTC10m
2026-06-06 N4186N - Jun 6, 21:04 UTCJun 6, 21:15 UTC10m
2026-06-03 N4186N - Jun 3, 16:45 UTCJun 3, 17:40 UTC55m
2026-05-31 N4186N - May 31, 17:00 UTCMay 31, 17:30 UTC30m
2026-05-29 N4186N - May 29, 19:30 UTCMay 29, 19:45 UTC15m
2026-05-29 N4186N - May 29, 18:00 UTCMay 29, 18:40 UTC40m
2026-05-29 N4186N - May 29, 15:00 UTCMay 29, 15:40 UTC40m
2026-05-25 N4186N - May 25, 16:45 UTCMay 25, 17:00 UTC15m
2026-05-24 N4186N - May 24, 17:55 UTCMay 24, 18:05 UTC10m
2026-05-24 N4186N - May 24, 16:30 UTCMay 24, 16:45 UTC15m

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 N4186N page for operator, model, and routing details .

Mode-S A4F50F frequently asked

What is Mode-S code A4F50F?
A4F50F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4186N.
Where is Mode-S A4F50F registered?
Mode-S code A4F50F 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 A4F50F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4F50F, octal 51172417, decimal 10,810,639.
What flights does A4F50F operate?
Mode-S A4F50F has broadcast 1 distinct callsign, including N4186N.