Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AF20C1

ICAO 24-bit transponder address

Currently assigned to 170748 · BEECH 200 Super King Air

Hex
AF20C1
Octal
53620301
Decimal
11,477,185
Tail
170748
Type
BE20
No current signal · last broadcast 1d ago
Flights observed
3
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AF20C1.

Callsign history 1 distinct

Callsign Airline Flights Last seen
STGRY07 - 3 2026-04-13

Recent flights last 3

DateFlightRouteTakeoffLandingDuration
2026-04-13 STGRY07 - Apr 13, 19:50 UTCApr 13, 20:35 UTC45m
2026-04-13 STGRY07 - Apr 13, 19:00 UTCApr 13, 20:10 UTC1h 10m
2026-04-13 STGRY07 - Apr 13, 16:40 UTCApr 13, 17:25 UTC45m

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 170748 page for operator, model, and routing details .

Mode-S AF20C1 frequently asked

What is Mode-S code AF20C1?
AF20C1 is an ICAO 24-bit transponder address. Assigned to 170748.
Is AF20C1 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 AF20C1, octal 53620301, decimal 11,477,185.
What flights does AF20C1 operate?
Mode-S AF20C1 has broadcast 1 distinct callsign, including STGRY07.