Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A04088

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N115U · DOUGLAS DC-3 Dakota · operated by BASLER TURBO CONVERSIONS LLC

Hex
A04088
Octal
50040210
Decimal
10,502,280
Country
US
Tail
N115U
Type
DC3
Photo of N115U
No current signal · last broadcast 1d ago
Flights observed
5
Distinct callsigns
2
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A04088.

Country allocation

The ICAO 24-bit address A04088 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
DAZ15 - 4 2026-04-13
DAZ11 - 1 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 DAZ11 - Apr 13, 21:10 UTCApr 13, 21:55 UTC45m
2026-04-13 DAZ15 ADQ → ANC Apr 13, 17:50 UTCApr 13, 19:10 UTC1h 20m
2026-04-13 DAZ15 - Apr 13, 16:15 UTCApr 13, 16:25 UTC10m
2026-04-13 DAZ15 - Apr 13, 15:50 UTCApr 13, 16:25 UTC35m
2026-04-13 DAZ15 - Apr 13, 15:10 UTCApr 13, 16:15 UTC1h 5m

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 N115U page for operator, model, and routing details .

Mode-S A04088 frequently asked

What is Mode-S code A04088?
A04088 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N115U.
Where is Mode-S A04088 registered?
Mode-S code A04088 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 A04088 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 A04088, octal 50040210, decimal 10,502,280.
What flights does A04088 operate?
Mode-S A04088 has broadcast 2 distinct callsigns, including DAZ15, DAZ11.