sensors Mode-S transponder

A04ECE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N119N · operated by SPANO THOMAS

Hex
A04ECE
Octal
50047316
Decimal
10,505,934
Country
US
Tail
N119N
No current signal · last broadcast 1h ago
Flights observed
5
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A04ECE.

Country allocation

The ICAO 24-bit address A04ECE 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
N119N - 5 2026-04-18

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-18 N119N - Apr 18, 15:20 UTCApr 18, 15:30 UTC10m
2026-04-16 N119N - Apr 16, 15:15 UTCApr 16, 15:25 UTC10m
2026-04-15 N119N - Apr 15, 17:05 UTCApr 15, 17:15 UTC10m
2026-04-14 N119N - Apr 14, 15:15 UTCApr 14, 15:30 UTC15m
2026-04-13 N119N - Apr 13, 12:35 UTCApr 13, 13:00 UTC25m

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 N119N page for operator, model, and routing details .

Mode-S A04ECE frequently asked

What is Mode-S code A04ECE?
A04ECE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N119N.
Where is Mode-S A04ECE registered?
Mode-S code A04ECE 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 A04ECE broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A04ECE, octal 50047316, decimal 10,505,934.
What flights does A04ECE operate?
Mode-S A04ECE has broadcast 1 distinct callsign, including N119N.