Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE56B4

ICAO 24-bit transponder address

Currently assigned to 13-20588 · SIKORSKY UH-60 Black Hawk

Hex
AE56B4
Octal
53453264
Decimal
11,425,460
Tail
13-20588
Type
H60
No current signal · last broadcast 20h ago
Flights observed
2
Distinct callsigns
1
Country
-
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S AE56B4.

Callsign history 1 distinct

Callsign Airline Flights Last seen
AR20813 - 2 2026-04-14

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-14 AR20813 - Apr 14, 07:50 UTCApr 14, 08:05 UTC15m
2026-04-14 AR20813 - Apr 14, 05:15 UTCApr 14, 05:30 UTC15m

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 13-20588 page for operator, model, and routing details .

Mode-S AE56B4 frequently asked

What is Mode-S code AE56B4?
AE56B4 is an ICAO 24-bit transponder address. Assigned to 13-20588.
Is AE56B4 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE56B4, octal 53453264, decimal 11,425,460.
What flights does AE56B4 operate?
Mode-S AE56B4 has broadcast 1 distinct callsign, including AR20813.