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sensors Mode-S transponder

A4F947

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N42AA · CESSNA 402 Businessliner · operated by N42AA LLC

Hex
A4F947
Octal
51174507
Decimal
10,811,719
Country
US
Tail
N42AA
Type
C402
No current signal · last broadcast 11h ago
Flights observed
190
Distinct callsigns
1
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A4F947.

Country allocation

The ICAO 24-bit address A4F947 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
N42AA - 190 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N42AA - Jul 13, 22:35 UTCJul 13, 23:15 UTC40m
2026-07-13 N42AA - Jul 13, 21:20 UTCJul 13, 22:00 UTC40m
2026-07-13 N42AA - Jul 13, 19:40 UTCJul 13, 19:50 UTC10m
2026-07-13 N42AA - Jul 13, 14:30 UTCJul 13, 15:20 UTC50m
2026-07-13 N42AA - Jul 13, 12:10 UTCJul 13, 13:20 UTC1h 10m
2026-07-10 N42AA - Jul 10, 10:25 UTCJul 10, 10:35 UTC10m
2026-07-09 N42AA - Jul 9, 20:25 UTCJul 9, 21:15 UTC50m
2026-07-09 N42AA - Jul 9, 15:50 UTCJul 9, 17:15 UTC1h 25m
2026-07-09 N42AA - Jul 9, 10:10 UTCJul 9, 10:20 UTC10m
2026-07-08 N42AA - Jul 8, 20:45 UTCJul 8, 21:25 UTC40m
2026-07-08 N42AA - Jul 8, 18:20 UTCJul 8, 19:25 UTC1h 5m
2026-07-08 N42AA - Jul 8, 10:15 UTCJul 8, 10:35 UTC20m
2026-07-07 N42AA - Jul 7, 15:25 UTCJul 7, 15:45 UTC20m
2026-07-07 N42AA - Jul 7, 14:35 UTCJul 7, 14:50 UTC15m
2026-07-06 N42AA - Jul 6, 16:25 UTCJul 6, 17:40 UTC1h 15m
2026-07-01 N42AA - Jul 1, 20:55 UTCJul 1, 22:15 UTC1h 20m
2026-07-01 N42AA - Jul 1, 15:45 UTCJul 1, 16:40 UTC55m
2026-06-29 N42AA - Jun 29, 21:54 UTCJun 29, 22:35 UTC40m
2026-06-29 N42AA - Jun 29, 19:39 UTCJun 29, 19:49 UTC10m
2026-06-29 N42AA - Jun 29, 14:14 UTCJun 29, 15:00 UTC45m
2026-06-29 N42AA - Jun 29, 13:14 UTCJun 29, 13:24 UTC10m
2026-06-29 N42AA - Jun 29, 11:39 UTCJun 29, 11:50 UTC10m
2026-06-29 N42AA - Jun 29, 10:20 UTCJun 29, 10:59 UTC40m
2026-06-28 N42AA - Jun 28, 21:45 UTCJun 28, 21:55 UTC10m
2026-06-28 N42AA - Jun 28, 20:09 UTCJun 28, 20:59 UTC50m
2026-06-28 N42AA - Jun 28, 18:44 UTCJun 28, 19:29 UTC45m
2026-06-27 N42AA - Jun 27, 18:54 UTCJun 27, 20:04 UTC1h 10m
2026-06-27 N42AA - Jun 27, 17:14 UTCJun 27, 18:24 UTC1h 10m
2026-06-27 N42AA - Jun 27, 12:29 UTCJun 27, 14:05 UTC1h 35m
2026-06-26 N42AA - Jun 26, 20:20 UTCJun 26, 20:29 UTC10m
2026-06-26 N42AA - Jun 26, 19:39 UTCJun 26, 19:50 UTC10m
2026-06-26 N42AA - Jun 26, 12:10 UTCJun 26, 12:19 UTC10m
2026-06-26 N42AA - Jun 26, 10:39 UTCJun 26, 10:50 UTC10m
2026-06-25 N42AA - Jun 25, 19:24 UTCJun 25, 19:34 UTC10m
2026-06-25 N42AA - Jun 25, 15:29 UTCJun 25, 15:40 UTC10m
2026-06-25 N42AA - Jun 25, 12:15 UTCJun 25, 12:25 UTC10m
2026-06-24 N42AA - Jun 24, 15:14 UTCJun 24, 16:34 UTC1h 20m
2026-06-24 N42AA - Jun 24, 13:24 UTCJun 24, 14:24 UTC1h 0m
2026-06-24 N42AA - Jun 24, 10:45 UTCJun 24, 10:55 UTC10m
2026-06-23 N42AA - Jun 23, 23:00 UTCJun 23, 23:50 UTC50m
2026-06-23 N42AA - Jun 23, 21:29 UTCJun 23, 21:39 UTC10m
2026-06-23 N42AA - Jun 23, 19:34 UTCJun 23, 19:44 UTC10m
2026-06-23 N42AA - Jun 23, 12:55 UTCJun 23, 13:09 UTC15m
2026-06-23 N42AA - Jun 23, 10:49 UTCJun 23, 10:59 UTC10m
2026-06-22 N42AA - Jun 22, 17:10 UTCJun 22, 18:49 UTC1h 40m
2026-06-22 N42AA - Jun 22, 15:10 UTCJun 22, 16:29 UTC1h 20m
2026-06-22 N42AA - Jun 22, 10:40 UTCJun 22, 11:50 UTC1h 10m
2026-06-21 N42AA - Jun 21, 19:45 UTCJun 21, 22:10 UTC2h 25m
2026-06-21 N42AA - Jun 21, 18:14 UTCJun 21, 18:39 UTC25m
2026-06-21 N42AA - Jun 21, 03:14 UTCJun 21, 03:25 UTC10m

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 N42AA page for operator, model, and routing details .

Mode-S A4F947 frequently asked

What is Mode-S code A4F947?
A4F947 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N42AA.
Where is Mode-S A4F947 registered?
Mode-S code A4F947 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 A4F947 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4F947, octal 51174507, decimal 10,811,719.
What flights does A4F947 operate?
Mode-S A4F947 has broadcast 1 distinct callsign, including N42AA.