Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE5AB1

ICAO 24-bit transponder address

Currently assigned to 15-20719 · SIKORSKY UH-60 Black Hawk

Hex
AE5AB1
Octal
53455261
Decimal
11,426,481
Tail
15-20719
Type
H60
No current signal · last broadcast 1d ago
Flights observed
4
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE5AB1.

Callsign history 1 distinct

Callsign Airline Flights Last seen
R20719 - 4 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 R20719 - Apr 13, 20:50 UTCApr 13, 21:40 UTC50m
2026-04-13 R20719 - Apr 13, 19:50 UTCApr 13, 20:05 UTC15m
2026-04-13 R20719 - Apr 13, 18:05 UTCApr 13, 20:05 UTC2h 0m
2026-04-13 R20719 - Apr 13, 14:05 UTCApr 13, 15:55 UTC1h 50m

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 15-20719 page for operator, model, and routing details .

Mode-S AE5AB1 frequently asked

What is Mode-S code AE5AB1?
AE5AB1 is an ICAO 24-bit transponder address. Assigned to 15-20719.
Is AE5AB1 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 AE5AB1, octal 53455261, decimal 11,426,481.
What flights does AE5AB1 operate?
Mode-S AE5AB1 has broadcast 1 distinct callsign, including R20719.