Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE4BFB

ICAO 24-bit transponder address

Hex
AE4BFB
Octal
53445773
Decimal
11,422,715
Type
V22
No current signal · last broadcast Apr 29, 21:15 UTC
Flights observed
3
Distinct callsigns
3
Country
-
Last broadcast
Apr 29, 21:15 UTC

Last known position

Most recent position reported by Mode-S AE4BFB.

Callsign history 3 distinct

Callsign Airline Flights Last seen
NTRDR31 - 1 2026-04-23
NTRDR01 - 1 2026-04-29
KNTRDR11 - 1 2026-04-23

Recent flights last 3

DateFlightRouteTakeoffLandingDuration
2026-04-29 NTRDR01 - Apr 29, 20:00 UTCApr 29, 21:15 UTC1h 15m
2026-04-23 NTRDR31 - Apr 23, 03:25 UTCApr 23, 04:00 UTC35m
2026-04-23 KNTRDR11 - Apr 23, 01:45 UTCApr 23, 02:05 UTC20m

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 AE4BFB frequently asked

What is Mode-S code AE4BFB?
AE4BFB is an ICAO 24-bit transponder address.
Is AE4BFB broadcasting right now?
No active broadcast right now. Last signal was Apr 29, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE4BFB, octal 53445773, decimal 11,422,715.
What flights does AE4BFB operate?
Mode-S AE4BFB has broadcast 3 distinct callsigns, including NTRDR31, NTRDR01, KNTRDR11.