Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE4ECA

ICAO 24-bit transponder address

Hex
AE4ECA
Octal
53447312
Decimal
11,423,434
No current signal · last broadcast 1d ago
Flights observed
4
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE4ECA.

Callsign history 1 distinct

Callsign Airline Flights Last seen
00000000 - 4 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 00000000 - Apr 13, 21:25 UTCApr 13, 21:35 UTC10m
2026-04-13 00000000 - Apr 13, 19:45 UTCApr 13, 20:20 UTC35m
2026-04-13 00000000 - Apr 13, 19:35 UTCApr 13, 20:10 UTC35m
2026-04-13 00000000 - Apr 13, 18:10 UTCApr 13, 18:55 UTC45m

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.

Mode-S AE4ECA frequently asked

What is Mode-S code AE4ECA?
AE4ECA is an ICAO 24-bit transponder address.
Is AE4ECA 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 AE4ECA, octal 53447312, decimal 11,423,434.
What flights does AE4ECA operate?
Mode-S AE4ECA has broadcast 1 distinct callsign, including 00000000.