Apparatus

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sensors Mode-S transponder

A4FF16

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4208G · CESSNA 172 Skyhawk · operated by N936AZ LLC

Hex
A4FF16
Octal
51177426
Decimal
10,813,206
Country
US
Tail
N4208G
Type
C172
Broadcasting now · callsign N54346 · 2,000 ft
Flights observed
248
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Current position

A4FF16 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4FF16 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
N54346 - 248 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N54346 - Jul 15, 13:50 UTCJul 15, 15:30 UTC1h 40m
2026-07-15 N54346 - Jul 15, 11:55 UTCJul 15, 12:55 UTC1h 0m
2026-07-15 N54346 - Jul 15, 01:30 UTCJul 15, 03:50 UTC2h 20m
2026-07-14 N54346 - Jul 14, 23:50 UTCJul 15, 00:45 UTC55m
2026-07-14 N54346 HWO → HWO Jul 14, 14:45 UTCJul 14, 15:55 UTC1h 10m
2026-07-14 N54346 - Jul 14, 12:45 UTCJul 14, 13:45 UTC1h 0m
2026-07-14 N54346 - Jul 14, 10:55 UTCJul 14, 12:10 UTC1h 15m
2026-07-14 N54346 - Jul 14, 00:05 UTCJul 14, 00:35 UTC30m
2026-07-13 N54346 HWO → HWO Jul 13, 23:10 UTCJul 13, 23:25 UTC15m
2026-07-13 N54346 - Jul 13, 18:45 UTCJul 13, 21:15 UTC2h 30m
2026-07-12 N54346 HWO → HWO Jul 12, 20:35 UTCJul 12, 21:05 UTC30m
2026-07-11 N54346 HWO → HWO Jul 11, 20:45 UTCJul 11, 22:50 UTC2h 5m
2026-07-11 N54346 HWO → HWO Jul 11, 13:35 UTCJul 11, 14:30 UTC55m
2026-07-10 N54346 HWO → HWO Jul 10, 21:30 UTCJul 10, 22:30 UTC1h 0m
2026-07-10 N54346 - Jul 10, 00:15 UTCJul 10, 01:55 UTC1h 40m
2026-07-08 N54346 - Jul 8, 23:30 UTCJul 9, 00:10 UTC40m
2026-07-08 N54346 - Jul 8, 21:25 UTCJul 8, 22:20 UTC55m
2026-07-08 N54346 HWO → HWO Jul 8, 15:40 UTCJul 8, 16:40 UTC1h 0m
2026-07-08 N54346 - Jul 8, 00:30 UTCJul 8, 01:05 UTC35m
2026-07-07 N54346 - Jul 7, 15:40 UTCJul 7, 16:30 UTC50m
2026-07-06 N54346 - Jul 6, 13:50 UTCJul 6, 14:50 UTC1h 0m
2026-07-05 N54346 - Jul 5, 20:25 UTCJul 5, 21:35 UTC1h 10m
2026-07-05 N54346 HWO → HWO Jul 5, 13:40 UTCJul 5, 14:35 UTC55m
2026-07-04 N54346 - Jul 4, 17:20 UTCJul 4, 17:55 UTC35m
2026-07-04 N54346 - Jul 4, 15:10 UTCJul 4, 15:45 UTC35m
2026-07-04 N54346 - Jul 4, 12:15 UTCJul 4, 13:10 UTC55m
2026-07-03 N54346 HWO → HWO Jul 3, 17:10 UTCJul 3, 18:40 UTC1h 30m
2026-07-02 N54346 - Jul 2, 22:10 UTCJul 2, 23:00 UTC50m
2026-07-02 N54346 HWO → HWO Jul 2, 15:50 UTCJul 2, 16:35 UTC45m
2026-07-02 N54346 HWO → HWO Jul 2, 11:50 UTCJul 2, 14:50 UTC3h 0m
2026-07-01 N54346 - Jul 1, 18:00 UTCJul 1, 19:15 UTC1h 15m
2026-07-01 N54346 - Jul 1, 11:15 UTCJul 1, 12:25 UTC1h 10m
2026-06-30 N54346 - Jun 30, 21:25 UTCJun 30, 22:30 UTC1h 5m
2026-06-30 N54346 - Jun 30, 17:10 UTCJun 30, 18:45 UTC1h 35m
2026-06-29 N54346 - Jun 29, 20:40 UTCJun 29, 21:39 UTC1h 0m
2026-06-29 N54346 HWO → HWO Jun 29, 18:34 UTCJun 29, 19:54 UTC1h 20m
2026-06-28 N54346 HWO → HWO Jun 28, 22:45 UTCJun 28, 23:25 UTC40m
2026-06-28 N54346 - Jun 28, 21:04 UTCJun 28, 21:34 UTC30m
2026-06-28 N54346 - Jun 28, 19:44 UTCJun 28, 20:19 UTC35m
2026-06-28 N54346 - Jun 28, 11:35 UTCJun 28, 12:25 UTC50m
2026-06-27 N54346 - Jun 27, 22:09 UTCJun 27, 22:49 UTC40m
2026-06-27 N54346 HWO → HWO Jun 27, 15:45 UTCJun 27, 16:44 UTC1h 0m
2026-06-27 N54346 - Jun 27, 14:05 UTCJun 27, 15:00 UTC55m
2026-06-27 N54346 - Jun 27, 12:15 UTCJun 27, 13:00 UTC45m
2026-06-27 N54346 HWO → HWO Jun 27, 00:39 UTCJun 27, 02:04 UTC1h 25m
2026-06-26 N54346 HWO → HWO Jun 26, 20:29 UTCJun 26, 21:04 UTC35m
2026-06-26 N54346 HWO → HWO Jun 26, 14:29 UTCJun 26, 15:10 UTC40m
2026-06-25 N54346 HWO → HWO Jun 25, 14:29 UTCJun 25, 15:50 UTC1h 20m
2026-06-25 N54346 - Jun 25, 11:50 UTCJun 25, 13:45 UTC1h 55m
2026-06-24 N54346 HWO → HWO Jun 24, 13:34 UTCJun 24, 14:50 UTC1h 15m

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 N4208G page for operator, model, and routing details .

Mode-S A4FF16 frequently asked

What is Mode-S code A4FF16?
A4FF16 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4208G.
Where is Mode-S A4FF16 registered?
Mode-S code A4FF16 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 A4FF16 broadcasting right now?
Yes. Mode-S A4FF16 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4FF16, octal 51177426, decimal 10,813,206.
What flights does A4FF16 operate?
Mode-S A4FF16 has broadcast 1 distinct callsign, including N54346.