Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AF3BC2

ICAO 24-bit transponder address

Currently assigned to 170113 · SIKORSKY UH-60 Black Hawk

Hex
AF3BC2
Octal
53635702
Decimal
11,484,098
Tail
170113
Type
H60
No current signal · last broadcast 2d ago
Flights observed
4
Distinct callsigns
1
Country
-
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S AF3BC2.

Callsign history 1 distinct

Callsign Airline Flights Last seen
SHWK427 - 4 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 SHWK427 - Apr 13, 05:15 UTCApr 13, 05:35 UTC20m
2026-04-13 SHWK427 - Apr 13, 02:25 UTCApr 13, 02:40 UTC15m
2026-04-13 SHWK427 - Apr 13, 01:30 UTCApr 13, 01:50 UTC20m
2026-04-12 SHWK427 - Apr 12, 18:55 UTCApr 12, 20:15 UTC1h 20m

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 170113 page for operator, model, and routing details .

Mode-S AF3BC2 frequently asked

What is Mode-S code AF3BC2?
AF3BC2 is an ICAO 24-bit transponder address. Assigned to 170113.
Is AF3BC2 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AF3BC2, octal 53635702, decimal 11,484,098.
What flights does AF3BC2 operate?
Mode-S AF3BC2 has broadcast 1 distinct callsign, including SHWK427.