Apparatus

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sensors Mode-S transponder

AE56BA

ICAO 24-bit transponder address

Currently assigned to 13-20594 · SIKORSKY UH-60 Black Hawk

Hex
AE56BA
Octal
53453272
Decimal
11,425,466
Tail
13-20594
Type
H60
No current signal · last broadcast 22h ago
Flights observed
4
Distinct callsigns
3
Country
-
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S AE56BA.

Callsign history 3 distinct

Callsign Airline Flights Last seen
BLOOD10 - 2 2026-06-18
BLOOD12 - 1 2026-06-10
BLOOD01 - 1 2026-06-18

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-06-18 BLOOD01 - Jun 18, 07:45 UTCJun 18, 08:10 UTC25m
2026-06-18 BLOOD10 - Jun 18, 04:50 UTCJun 18, 05:00 UTC10m
2026-06-18 BLOOD10 - Jun 18, 03:00 UTCJun 18, 03:10 UTC10m
2026-06-10 BLOOD12 - Jun 10, 23:40 UTCJun 10, 23:55 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 13-20594 page for operator, model, and routing details .

Mode-S AE56BA frequently asked

What is Mode-S code AE56BA?
AE56BA is an ICAO 24-bit transponder address. Assigned to 13-20594.
Is AE56BA broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE56BA, octal 53453272, decimal 11,425,466.
What flights does AE56BA operate?
Mode-S AE56BA has broadcast 3 distinct callsigns, including BLOOD10, BLOOD12, BLOOD01.