Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A5FE17

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4854G · CESSNA 172 Skyhawk · operated by MILWAUKEE AERO LLC

Hex
A5FE17
Octal
51377027
Decimal
10,878,487
Country
US
Tail
N4854G
Type
C172
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
203
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A5FE17.

Country allocation

The ICAO 24-bit address A5FE17 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
N4854G - 203 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N4854G - Jul 26, 21:25 UTCJul 26, 21:45 UTC20m
2026-07-26 N4854G - Jul 26, 14:50 UTCJul 26, 16:00 UTC1h 10m
2026-07-25 N4854G - Jul 25, 14:25 UTCJul 25, 16:05 UTC1h 40m
2026-07-24 N4854G - Jul 24, 23:00 UTCJul 25, 00:30 UTC1h 30m
2026-07-23 N4854G - Jul 23, 16:10 UTCJul 23, 16:25 UTC15m
2026-07-23 N4854G - Jul 23, 13:30 UTCJul 23, 15:15 UTC1h 45m
2026-07-23 N4854G - Jul 23, 00:10 UTCJul 23, 01:20 UTC1h 10m
2026-07-22 N4854G - Jul 22, 22:25 UTCJul 22, 23:25 UTC1h 0m
2026-07-22 N4854G MKE → MKE Jul 22, 16:40 UTCJul 22, 17:50 UTC1h 10m
2026-07-22 N4854G MKE → MKE Jul 22, 14:40 UTCJul 22, 15:55 UTC1h 15m
2026-07-22 N4854G - Jul 22, 02:10 UTCJul 22, 04:20 UTC2h 10m
2026-07-21 N4854G - Jul 21, 20:40 UTCJul 21, 21:50 UTC1h 10m
2026-07-21 N4854G - Jul 21, 17:35 UTCJul 21, 19:40 UTC2h 5m
2026-07-13 N4854G - Jul 13, 16:00 UTCJul 13, 16:35 UTC35m
2026-07-13 N4854G - Jul 13, 13:35 UTCJul 13, 14:05 UTC30m
2026-07-12 N4854G - Jul 12, 23:50 UTCJul 13, 00:45 UTC55m
2026-07-12 N4854G - Jul 12, 14:01 UTCJul 12, 14:45 UTC45m
2026-07-11 N4854G - Jul 11, 20:35 UTCJul 11, 21:55 UTC1h 20m
2026-07-11 N4854G - Jul 11, 17:50 UTCJul 11, 19:40 UTC1h 50m
2026-07-11 N4854G - Jul 11, 14:20 UTCJul 11, 15:45 UTC1h 25m
2026-07-11 N4854G - Jul 11, 04:10 UTCJul 11, 05:40 UTC1h 30m
2026-07-10 N4854G - Jul 10, 21:20 UTCJul 10, 22:35 UTC1h 15m
2026-07-10 N4854G - Jul 10, 19:15 UTCJul 10, 20:25 UTC1h 10m
2026-07-10 N4854G - Jul 10, 16:20 UTCJul 10, 17:10 UTC50m
2026-07-10 N4854G - Jul 10, 13:35 UTCJul 10, 14:25 UTC50m
2026-07-09 N4854G - Jul 9, 19:40 UTCJul 9, 20:25 UTC45m
2026-07-09 N4854G - Jul 9, 15:40 UTCJul 9, 17:05 UTC1h 25m
2026-07-09 N4854G - Jul 9, 13:25 UTCJul 9, 14:15 UTC50m
2026-07-09 N4854G - Jul 9, 00:10 UTCJul 9, 01:15 UTC1h 5m
2026-07-08 N4854G - Jul 8, 21:15 UTCJul 8, 22:20 UTC1h 5m
2026-07-08 N4854G - Jul 8, 17:55 UTCJul 8, 19:00 UTC1h 5m
2026-07-08 N4854G - Jul 8, 16:45 UTCJul 8, 16:55 UTC10m
2026-07-08 N4854G - Jul 8, 15:00 UTCJul 8, 15:10 UTC10m
2026-07-08 N4854G - Jul 8, 02:00 UTCJul 8, 04:40 UTC2h 40m
2026-07-07 N4854G - Jul 7, 20:25 UTCJul 7, 21:15 UTC50m
2026-07-07 N4854G - Jul 7, 18:40 UTCJul 7, 19:40 UTC1h 0m
2026-07-07 N4854G - Jul 7, 16:15 UTCJul 7, 17:50 UTC1h 35m
2026-07-07 N4854G - Jul 7, 14:35 UTCJul 7, 15:20 UTC45m
2026-07-07 N4854G - Jul 7, 04:35 UTCJul 7, 06:15 UTC1h 40m
2026-07-06 N4854G - Jul 6, 20:35 UTCJul 6, 22:05 UTC1h 30m
2026-07-06 N4854G - Jul 6, 18:00 UTCJul 6, 19:55 UTC1h 55m
2026-07-06 N4854G - Jul 6, 15:15 UTCJul 6, 16:30 UTC1h 15m
2026-07-05 N4854G - Jul 5, 22:10 UTCJul 5, 23:40 UTC1h 30m
2026-07-05 N4854G - Jul 5, 01:30 UTCJul 5, 02:50 UTC1h 20m
2026-07-04 N4854G - Jul 4, 10:40 UTCJul 4, 11:50 UTC1h 10m
2026-07-02 N4854G - Jul 2, 21:15 UTCJul 2, 22:40 UTC1h 25m
2026-07-02 N4854G - Jul 2, 00:50 UTCJul 2, 01:55 UTC1h 5m
2026-07-01 N4854G - Jul 1, 22:45 UTCJul 1, 23:45 UTC1h 0m
2026-07-01 N4854G - Jul 1, 21:00 UTCJul 1, 21:45 UTC45m
2026-07-01 N4854G - Jul 1, 18:05 UTCJul 1, 18:55 UTC50m

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 N4854G page for operator, model, and routing details .

Mode-S A5FE17 frequently asked

What is Mode-S code A5FE17?
A5FE17 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4854G.
Where is Mode-S A5FE17 registered?
Mode-S code A5FE17 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 A5FE17 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5FE17, octal 51377027, decimal 10,878,487.
What flights does A5FE17 operate?
Mode-S A5FE17 has broadcast 1 distinct callsign, including N4854G.