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sensors Mode-S transponder

A558AA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4434D · PIPER PA-31-300/310/325/350/425 · operated by AIR ARCTIC INC

Hex
A558AA
Octal
51254252
Decimal
10,836,138
Country
US
Tail
N4434D
Type
PA31
No current signal · last broadcast 3d ago
Flights observed
101
Distinct callsigns
1
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A558AA.

Country allocation

The ICAO 24-bit address A558AA 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
WAV34D - 101 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 WAV34D - Jul 22, 03:10 UTCJul 22, 03:25 UTC15m
2026-07-22 WAV34D - Jul 22, 00:35 UTCJul 22, 00:50 UTC15m
2026-07-21 WAV34D - Jul 21, 23:00 UTCJul 21, 23:15 UTC15m
2026-07-20 WAV34D - Jul 20, 23:25 UTCJul 20, 23:40 UTC15m
2026-07-20 WAV34D - Jul 20, 21:25 UTCJul 20, 21:50 UTC25m
2026-07-15 WAV34D - Jul 15, 19:50 UTCJul 15, 20:10 UTC20m
2026-07-15 WAV34D - Jul 15, 15:00 UTCJul 15, 15:15 UTC15m
2026-07-15 WAV34D - Jul 15, 06:00 UTCJul 15, 06:30 UTC30m
2026-07-15 WAV34D - Jul 15, 03:10 UTCJul 15, 03:30 UTC20m
2026-07-15 WAV34D - Jul 15, 01:55 UTCJul 15, 02:10 UTC15m
2026-07-14 WAV34D - Jul 14, 20:55 UTCJul 14, 21:10 UTC15m
2026-07-14 WAV34D - Jul 14, 06:05 UTCJul 14, 06:20 UTC15m
2026-07-14 WAV34D - Jul 14, 03:10 UTCJul 14, 03:20 UTC10m
2026-07-13 WAV34D FAI → FAI Jul 13, 19:55 UTCJul 13, 21:10 UTC1h 15m
2026-07-13 WAV34D - Jul 13, 07:15 UTCJul 13, 07:30 UTC15m
2026-07-13 WAV34D - Jul 13, 02:55 UTCJul 13, 03:15 UTC20m
2026-07-12 WAV34D - Jul 12, 08:10 UTCJul 12, 08:20 UTC10m
2026-07-12 WAV34D - Jul 12, 02:55 UTCJul 12, 03:15 UTC20m
2026-07-12 WAV34D - Jul 12, 01:40 UTCJul 12, 02:01 UTC20m
2026-07-11 WAV34D - Jul 11, 20:50 UTCJul 11, 21:05 UTC15m
2026-07-11 WAV34D - Jul 11, 06:15 UTCJul 11, 06:35 UTC20m
2026-07-11 WAV34D - Jul 11, 03:10 UTCJul 11, 03:25 UTC15m
2026-07-11 WAV34D - Jul 11, 01:05 UTCJul 11, 01:30 UTC25m
2026-07-10 WAV34D - Jul 10, 22:00 UTCJul 10, 22:30 UTC30m
2026-07-08 WAV34D - Jul 8, 19:40 UTCJul 8, 19:55 UTC15m
2026-07-08 WAV34D - Jul 8, 14:50 UTCJul 8, 15:00 UTC10m
2026-07-07 WAV34D - Jul 7, 06:05 UTCJul 7, 06:20 UTC15m
2026-07-07 WAV34D - Jul 7, 03:05 UTCJul 7, 03:15 UTC10m
2026-07-06 WAV34D - Jul 6, 01:45 UTCJul 6, 02:00 UTC15m
2026-07-05 WAV34D - Jul 5, 20:55 UTCJul 5, 21:15 UTC20m
2026-07-05 WAV34D - Jul 5, 05:50 UTCJul 5, 06:15 UTC25m
2026-07-05 WAV34D - Jul 5, 03:05 UTCJul 5, 03:25 UTC20m
2026-07-02 WAV34D - Jul 2, 07:10 UTCJul 2, 07:30 UTC20m
2026-07-02 WAV34D - Jul 2, 03:00 UTCJul 2, 03:25 UTC25m
2026-07-02 WAV34D - Jul 2, 01:45 UTCJul 2, 01:55 UTC10m
2026-07-01 WAV34D - Jul 1, 20:55 UTCJul 1, 21:10 UTC15m
2026-07-01 WAV34D - Jul 1, 19:35 UTCJul 1, 19:50 UTC15m
2026-07-01 WAV34D - Jul 1, 14:50 UTCJul 1, 15:10 UTC20m
2026-06-30 WAV34D - Jun 30, 19:40 UTCJun 30, 20:10 UTC30m
2026-06-30 WAV34D - Jun 30, 16:05 UTCJun 30, 16:40 UTC35m
2026-06-25 WAV34D - Jun 25, 07:49 UTCJun 25, 07:59 UTC10m
2026-06-25 WAV34D FAI → LIV Jun 25, 02:59 UTCJun 25, 03:15 UTC15m
2026-06-24 WAV34D - Jun 24, 23:54 UTCJun 25, 00:05 UTC10m
2026-06-24 WAV34D - Jun 24, 21:40 UTCJun 24, 21:54 UTC15m
2026-06-24 WAV34D - Jun 24, 19:39 UTCJun 24, 19:55 UTC15m
2026-06-24 WAV34D - Jun 24, 15:05 UTCJun 24, 15:14 UTC10m
2026-06-24 WAV34D - Jun 24, 01:39 UTCJun 24, 01:49 UTC10m
2026-06-23 WAV34D - Jun 23, 21:05 UTCJun 23, 21:20 UTC15m
2026-06-23 WAV34D - Jun 23, 19:34 UTCJun 23, 19:50 UTC15m
2026-06-23 WAV34D - Jun 23, 14:55 UTCJun 23, 15:09 UTC15m

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 N4434D page for operator, model, and routing details .

Mode-S A558AA frequently asked

What is Mode-S code A558AA?
A558AA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4434D.
Where is Mode-S A558AA registered?
Mode-S code A558AA 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 A558AA broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A558AA, octal 51254252, decimal 10,836,138.
What flights does A558AA operate?
Mode-S A558AA has broadcast 1 distinct callsign, including WAV34D.