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sensors Mode-S transponder

A4EE59

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N417CF · BELL 407 · operated by CAREFLITE

Hex
A4EE59
Octal
51167131
Decimal
10,808,921
Country
US
Tail
N417CF
Type
B407
No current signal · last broadcast 49m ago
Flights observed
332
Distinct callsigns
1
Country
US
Last broadcast
49m ago

Last known position

Most recent position reported by Mode-S A4EE59.

Country allocation

The ICAO 24-bit address A4EE59 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
N417CF - 332 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N417CF - Jul 22, 03:40 UTCJul 22, 03:55 UTC15m
2026-07-22 N417CF - Jul 22, 02:40 UTCJul 22, 02:55 UTC15m
2026-07-21 N417CF - Jul 21, 23:55 UTCJul 22, 00:10 UTC15m
2026-07-21 N417CF - Jul 21, 22:25 UTCJul 21, 23:25 UTC1h 0m
2026-07-21 N417CF - Jul 21, 21:20 UTCJul 21, 21:30 UTC10m
2026-07-21 N417CF - Jul 21, 12:45 UTCJul 21, 13:05 UTC20m
2026-07-21 N417CF - Jul 21, 07:05 UTCJul 21, 07:20 UTC15m
2026-07-21 N417CF - Jul 21, 06:00 UTCJul 21, 06:20 UTC20m
2026-07-21 N417CF - Jul 21, 04:40 UTCJul 21, 04:50 UTC10m
2026-07-20 N417CF - Jul 20, 22:45 UTCJul 20, 23:00 UTC15m
2026-07-19 N417CF - Jul 19, 21:00 UTCJul 19, 21:20 UTC20m
2026-07-19 N417CF - Jul 19, 19:45 UTCJul 19, 20:30 UTC45m
2026-07-19 N417CF - Jul 19, 02:15 UTCJul 19, 02:30 UTC15m
2026-07-19 N417CF - Jul 19, 01:15 UTCJul 19, 01:40 UTC25m
2026-07-18 N417CF - Jul 18, 23:55 UTCJul 19, 00:10 UTC15m
2026-07-18 N417CF - Jul 18, 22:55 UTCJul 18, 23:20 UTC25m
2026-07-18 N417CF - Jul 18, 11:40 UTCJul 18, 11:55 UTC15m
2026-07-18 N417CF - Jul 18, 10:30 UTCJul 18, 11:10 UTC40m
2026-07-18 N417CF - Jul 18, 04:30 UTCJul 18, 04:45 UTC15m
2026-07-18 N417CF - Jul 18, 03:35 UTCJul 18, 03:50 UTC15m
2026-07-18 N417CF - Jul 18, 01:15 UTCJul 18, 02:35 UTC1h 20m
2026-07-17 N417CF - Jul 17, 21:00 UTCJul 17, 22:20 UTC1h 20m
2026-07-17 N417CF - Jul 17, 20:15 UTCJul 17, 20:29 UTC15m
2026-07-17 N417CF - Jul 17, 17:44 UTCJul 17, 19:35 UTC1h 50m
2026-07-16 N417CF - Jul 16, 21:25 UTCJul 16, 21:40 UTC15m
2026-07-16 N417CF - Jul 16, 20:29 UTCJul 16, 20:45 UTC15m
2026-07-16 N417CF - Jul 16, 19:30 UTCJul 16, 19:45 UTC15m
2026-07-16 N417CF - Jul 16, 18:19 UTCJul 16, 18:59 UTC40m
2026-07-13 N417CF - Jul 13, 21:15 UTCJul 13, 21:30 UTC15m
2026-07-13 N417CF - Jul 13, 20:25 UTCJul 13, 20:40 UTC15m
2026-07-12 N417CF - Jul 12, 17:25 UTCJul 12, 17:45 UTC20m
2026-07-12 N417CF - Jul 12, 15:50 UTCJul 12, 16:01 UTC10m
2026-07-12 N417CF - Jul 12, 14:10 UTCJul 12, 14:45 UTC35m
2026-07-11 N417CF - Jul 11, 22:40 UTCJul 11, 23:10 UTC30m
2026-07-11 N417CF - Jul 11, 21:30 UTCJul 11, 22:05 UTC35m
2026-07-11 N417CF - Jul 11, 17:00 UTCJul 11, 17:25 UTC25m
2026-07-11 N417CF - Jul 11, 15:40 UTCJul 11, 16:15 UTC35m
2026-07-11 N417CF - Jul 11, 14:30 UTCJul 11, 14:45 UTC15m
2026-07-11 N417CF - Jul 11, 13:40 UTCJul 11, 13:55 UTC15m
2026-07-10 N417CF - Jul 10, 22:05 UTCJul 10, 22:35 UTC30m
2026-07-10 N417CF - Jul 10, 21:00 UTCJul 10, 21:30 UTC30m
2026-07-10 N417CF - Jul 10, 19:35 UTCJul 10, 19:50 UTC15m
2026-07-10 N417CF - Jul 10, 18:35 UTCJul 10, 18:50 UTC15m
2026-07-10 N417CF - Jul 10, 13:55 UTCJul 10, 14:15 UTC20m
2026-07-10 N417CF - Jul 10, 12:45 UTCJul 10, 13:20 UTC35m
2026-07-10 N417CF - Jul 10, 05:20 UTCJul 10, 05:40 UTC20m
2026-07-10 N417CF - Jul 10, 04:00 UTCJul 10, 04:15 UTC15m
2026-07-10 N417CF - Jul 10, 03:05 UTCJul 10, 03:15 UTC10m
2026-07-09 N417CF - Jul 9, 19:15 UTCJul 9, 20:50 UTC1h 35m
2026-07-09 N417CF - Jul 9, 03:05 UTCJul 9, 03:25 UTC20m

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 N417CF page for operator, model, and routing details .

Mode-S A4EE59 frequently asked

What is Mode-S code A4EE59?
A4EE59 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N417CF.
Where is Mode-S A4EE59 registered?
Mode-S code A4EE59 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 A4EE59 broadcasting right now?
No active broadcast right now. Last signal was 49m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4EE59, octal 51167131, decimal 10,808,921.
What flights does A4EE59 operate?
Mode-S A4EE59 has broadcast 1 distinct callsign, including N417CF.