Apparatus

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sensors Mode-S transponder

AE56BD

ICAO 24-bit transponder address

Currently assigned to 13-20597 · SIKORSKY UH-60 Black Hawk

Hex
AE56BD
Octal
53453275
Decimal
11,425,469
Tail
13-20597
Type
H60
No current signal · last broadcast 13d ago
Flights observed
2
Distinct callsigns
2
Country
-
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S AE56BD.

Callsign history 2 distinct

Callsign Airline Flights Last seen
BLOOD06 - 1 2026-06-05
BLOOD01 - 1 2026-06-04

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-06-05 BLOOD06 HHI → HHI Jun 5, 20:15 UTCJun 5, 23:20 UTC3h 5m
2026-06-04 BLOOD01 - Jun 4, 03:10 UTCJun 4, 05:15 UTC2h 5m

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 13-20597 page for operator, model, and routing details .

Mode-S AE56BD frequently asked

What is Mode-S code AE56BD?
AE56BD is an ICAO 24-bit transponder address. Assigned to 13-20597.
Is AE56BD broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE56BD, octal 53453275, decimal 11,425,469.
What flights does AE56BD operate?
Mode-S AE56BD has broadcast 2 distinct callsigns, including BLOOD06, BLOOD01.