Apparatus

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sensors Mode-S transponder

AE74AB

ICAO 24-bit transponder address

Currently assigned to 22-21223 · Sikorsky UH-60M Black Hawk

Hex
AE74AB
Octal
53472253
Decimal
11,433,131
Tail
22-21223
Type
H60
No current signal · last broadcast 21h ago
Flights observed
15
Distinct callsigns
1
Country
-
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S AE74AB.

Callsign history 1 distinct

Callsign Airline Flights Last seen
G21223 - 3 2026-07-13

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-07-13 G21223 - Jul 13, 20:20 UTCJul 13, 20:50 UTC30m
2026-07-13 G21223 - Jul 13, 15:10 UTCJul 13, 15:50 UTC40m
2026-07-13 G21223 - Jul 13, 13:40 UTCJul 13, 13:50 UTC10m
2026-07-09 - - Jul 9, 20:55 UTCJul 9, 21:05 UTC10m
2026-07-08 - - Jul 8, 18:40 UTCJul 8, 19:10 UTC30m
2026-07-06 - - Jul 6, 17:00 UTCJul 6, 17:15 UTC15m
2026-07-03 - - Jul 3, 19:35 UTCJul 3, 19:50 UTC15m
2026-07-03 - - Jul 3, 14:20 UTCJul 3, 14:30 UTC10m
2026-07-02 - - Jul 2, 15:20 UTCJul 2, 15:30 UTC10m
2026-07-02 - - Jul 2, 01:40 UTCJul 2, 02:00 UTC20m
2026-07-01 - - Jul 1, 02:05 UTCJul 1, 02:40 UTC35m
2026-06-30 - - Jun 30, 23:25 UTCJun 30, 23:45 UTC20m
2026-06-29 - - Jun 29, 22:05 UTCJun 29, 22:19 UTC15m
2026-06-29 - - Jun 29, 16:35 UTCJun 29, 16:55 UTC20m
2026-06-26 - - Jun 26, 17:00 UTCJun 26, 17:25 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 22-21223 page for operator, model, and routing details .

Mode-S AE74AB frequently asked

What is Mode-S code AE74AB?
AE74AB is an ICAO 24-bit transponder address. Assigned to 22-21223.
Is AE74AB broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE74AB, octal 53472253, decimal 11,433,131.
What flights does AE74AB operate?
Mode-S AE74AB has broadcast 1 distinct callsign, including G21223.