Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AF3C5B

ICAO 24-bit transponder address

Currently assigned to 90-26219 · SIKORSKY UH-60 Black Hawk

Hex
AF3C5B
Octal
53636133
Decimal
11,484,251
Tail
90-26219
Type
H60
No current signal · last broadcast 1d ago
Flights observed
2
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AF3C5B.

Callsign history 1 distinct

Callsign Airline Flights Last seen
G26219 - 2 2026-04-13

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-13 G26219 - Apr 13, 17:35 UTCApr 13, 18:05 UTC30m
2026-04-13 G26219 - Apr 13, 16:30 UTCApr 13, 16:50 UTC20m

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 90-26219 page for operator, model, and routing details .

Mode-S AF3C5B frequently asked

What is Mode-S code AF3C5B?
AF3C5B is an ICAO 24-bit transponder address. Assigned to 90-26219.
Is AF3C5B 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 AF3C5B, octal 53636133, decimal 11,484,251.
What flights does AF3C5B operate?
Mode-S AF3C5B has broadcast 1 distinct callsign, including G26219.