Apparatus

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sensors Mode-S transponder

A4A929

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4NP · CESSNA 172 Skyhawk · operated by SKYWARRIOR FLIGHT TRAINING INC

Hex
A4A929
Octal
51124451
Decimal
10,791,209
Country
US
Tail
N4NP
Type
C172
No current signal · last broadcast 1d ago
Flights observed
95
Distinct callsigns
2
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A4A929.

Country allocation

The ICAO 24-bit address A4A929 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 2 distinct

Callsign Airline Flights Last seen
BL4NP - 74 2026-06-26
N4NP - 21 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 N4NP - Jul 12, 19:45 UTCJul 12, 20:10 UTC25m
2026-07-12 N4NP - Jul 12, 13:20 UTCJul 12, 13:45 UTC25m
2026-07-08 N4NP - Jul 8, 21:15 UTCJul 8, 21:25 UTC10m
2026-07-08 N4NP - Jul 8, 19:40 UTCJul 8, 19:50 UTC10m
2026-07-07 N4NP - Jul 7, 16:25 UTCJul 7, 16:45 UTC20m
2026-07-03 N4NP PNS → PNS Jul 3, 22:15 UTCJul 3, 23:50 UTC1h 35m
2026-07-02 N4NP - Jul 2, 22:25 UTCJul 3, 00:20 UTC1h 55m
2026-07-02 N4NP - Jul 2, 20:25 UTCJul 2, 20:40 UTC15m
2026-07-02 N4NP - Jul 2, 19:10 UTCJul 2, 19:25 UTC15m
2026-07-01 N4NP - Jul 1, 22:15 UTCJul 1, 23:40 UTC1h 25m
2026-07-01 N4NP - Jul 1, 19:40 UTCJul 1, 20:20 UTC40m
2026-07-01 N4NP - Jul 1, 16:35 UTCJul 1, 17:45 UTC1h 10m
2026-07-01 N4NP - Jul 1, 13:25 UTCJul 1, 14:55 UTC1h 30m
2026-07-01 N4NP - Jul 1, 12:25 UTCJul 1, 12:55 UTC30m
2026-06-29 N4NP - Jun 29, 21:39 UTCJun 29, 22:55 UTC1h 15m
2026-06-29 N4NP - Jun 29, 19:35 UTCJun 29, 20:54 UTC1h 20m
2026-06-28 N4NP - Jun 28, 17:39 UTCJun 28, 18:59 UTC1h 20m
2026-06-28 N4NP - Jun 28, 16:39 UTCJun 28, 16:49 UTC10m
2026-06-28 N4NP - Jun 28, 11:59 UTCJun 28, 13:59 UTC2h 0m
2026-06-27 N4NP - Jun 27, 13:15 UTCJun 27, 15:14 UTC2h 0m
2026-06-26 N4NP - Jun 26, 16:44 UTCJun 26, 17:29 UTC45m
2026-06-26 BL4NP - Jun 26, 14:05 UTCJun 26, 14:59 UTC55m
2026-06-25 BL4NP - Jun 25, 19:44 UTCJun 25, 21:15 UTC1h 30m
2026-06-25 BL4NP - Jun 25, 17:49 UTCJun 25, 18:50 UTC1h 0m
2026-06-23 BL4NP - Jun 23, 15:59 UTCJun 23, 16:20 UTC20m
2026-06-22 BL4NP - Jun 22, 19:19 UTCJun 22, 20:19 UTC1h 0m
2026-06-22 BL4NP - Jun 22, 14:14 UTCJun 22, 15:24 UTC1h 10m
2026-06-22 BL4NP - Jun 22, 12:05 UTCJun 22, 13:29 UTC1h 25m
2026-06-17 BL4NP - Jun 17, 16:35 UTCJun 17, 17:30 UTC55m
2026-06-15 BL4NP - Jun 15, 19:39 UTCJun 15, 20:50 UTC1h 10m
2026-06-12 BL4NP GUF → GUF Jun 12, 18:15 UTCJun 12, 19:40 UTC1h 25m
2026-06-12 BL4NP - Jun 12, 15:00 UTCJun 12, 16:20 UTC1h 20m
2026-06-12 BL4NP - Jun 12, 12:45 UTCJun 12, 13:55 UTC1h 10m
2026-06-11 BL4NP - Jun 11, 17:35 UTCJun 11, 19:00 UTC1h 25m
2026-06-11 BL4NP - Jun 11, 15:10 UTCJun 11, 15:55 UTC45m
2026-06-11 BL4NP - Jun 11, 12:50 UTCJun 11, 14:20 UTC1h 30m
2026-06-10 BL4NP - Jun 10, 20:45 UTCJun 10, 21:00 UTC15m
2026-06-10 BL4NP - Jun 10, 16:40 UTCJun 10, 17:00 UTC20m
2026-06-10 BL4NP - Jun 10, 13:30 UTCJun 10, 14:40 UTC1h 10m
2026-06-09 BL4NP - Jun 9, 21:30 UTCJun 9, 21:50 UTC20m
2026-06-09 BL4NP - Jun 9, 20:35 UTCJun 9, 20:55 UTC20m
2026-06-09 BL4NP - Jun 9, 16:45 UTCJun 9, 17:40 UTC55m
2026-06-09 BL4NP - Jun 9, 14:10 UTCJun 9, 15:10 UTC1h 0m
2026-06-08 BL4NP - Jun 8, 18:25 UTCJun 8, 19:40 UTC1h 15m
2026-06-08 BL4NP - Jun 8, 14:40 UTCJun 8, 15:50 UTC1h 10m
2026-06-08 BL4NP - Jun 8, 12:15 UTCJun 8, 13:40 UTC1h 25m
2026-06-05 BL4NP - Jun 5, 16:00 UTCJun 5, 17:20 UTC1h 20m
2026-06-04 BL4NP - Jun 4, 17:05 UTCJun 4, 18:25 UTC1h 20m
2026-06-04 BL4NP - Jun 4, 15:10 UTCJun 4, 15:40 UTC30m
2026-06-02 BL4NP - Jun 2, 18:45 UTCJun 2, 19:40 UTC55m

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 N4NP page for operator, model, and routing details .

Mode-S A4A929 frequently asked

What is Mode-S code A4A929?
A4A929 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4NP.
Where is Mode-S A4A929 registered?
Mode-S code A4A929 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 A4A929 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4A929, octal 51124451, decimal 10,791,209.
What flights does A4A929 operate?
Mode-S A4A929 has broadcast 2 distinct callsigns, including BL4NP, N4NP.