Apparatus

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sensors Mode-S transponder

AE5D70

ICAO 24-bit transponder address

Currently assigned to 16-20871 · SIKORSKY UH-60 Black Hawk

Hex
AE5D70
Octal
53456560
Decimal
11,427,184
Tail
16-20871
Type
H60
No current signal · last broadcast 20d ago
Flights observed
11
Distinct callsigns
2
Country
-
Last broadcast
20d ago

Last known position

Most recent position reported by Mode-S AE5D70.

Callsign history 2 distinct

Callsign Airline Flights Last seen
R20871 - 9 2026-07-01
EVAC871 - 2 2026-07-15

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-07-15 EVAC871 - Jul 15, 18:50 UTCJul 15, 19:00 UTC10m
2026-07-01 R20871 - Jul 1, 03:05 UTCJul 1, 03:15 UTC10m
2026-06-26 R20871 - Jun 26, 12:10 UTCJun 26, 12:39 UTC30m
2026-06-25 R20871 - Jun 25, 10:39 UTCJun 25, 10:55 UTC15m
2026-06-19 R20871 - Jun 19, 01:50 UTCJun 19, 02:14 UTC25m
2026-06-19 R20871 - Jun 19, 00:24 UTCJun 19, 01:19 UTC55m
2026-06-18 R20871 - Jun 18, 04:10 UTCJun 18, 04:25 UTC15m
2026-06-18 R20871 - Jun 18, 00:15 UTCJun 18, 00:55 UTC40m
2026-05-22 R20871 - May 22, 13:35 UTCMay 22, 13:45 UTC10m
2026-05-10 R20871 - May 10, 08:00 UTCMay 10, 08:30 UTC30m
2026-05-10 EVAC871 - May 10, 06:10 UTCMay 10, 06:35 UTC25m

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 16-20871 page for operator, model, and routing details .

Mode-S AE5D70 frequently asked

What is Mode-S code AE5D70?
AE5D70 is an ICAO 24-bit transponder address. Assigned to 16-20871.
Is AE5D70 broadcasting right now?
No active broadcast right now. Last signal was 20d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE5D70, octal 53456560, decimal 11,427,184.
What flights does AE5D70 operate?
Mode-S AE5D70 has broadcast 2 distinct callsigns, including R20871, EVAC871.