Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE2125

ICAO 24-bit transponder address

Hex
AE2125
Octal
53420445
Decimal
11,411,749
No current signal · last broadcast 1d ago
Flights observed
3
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE2125.

Callsign history 1 distinct

Callsign Airline Flights Last seen
C2701 - 3 2026-04-13

Recent flights last 3

DateFlightRouteTakeoffLandingDuration
2026-04-13 C2701 - Apr 13, 21:35 UTCApr 13, 22:15 UTC40m
2026-04-13 C2701 - Apr 13, 20:00 UTCApr 13, 20:10 UTC10m
2026-04-13 C2701 - Apr 13, 16:45 UTCApr 13, 19:10 UTC2h 25m

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 AE2125 frequently asked

What is Mode-S code AE2125?
AE2125 is an ICAO 24-bit transponder address.
Is AE2125 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 AE2125, octal 53420445, decimal 11,411,749.
What flights does AE2125 operate?
Mode-S AE2125 has broadcast 1 distinct callsign, including C2701.