sensors Mode-S transponder

ADFF5C

ICAO 24-bit transponder address

Currently assigned to 68-8136 · Northrop T-38C Talon

Hex
ADFF5C
Octal
53377534
Decimal
11,403,100
Tail
68-8136
Type
T38
No current signal · last broadcast 1d ago
Flights observed
6
Distinct callsigns
4
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ADFF5C.

Callsign history 4 distinct

Callsign Airline Flights Last seen
RANDY11 - 2 2026-04-12
MACH69 - 2 2026-04-13
ICEMAN1 - 1 2026-04-13
ANARCH2 - 1 2026-04-13

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-13 MACH69 - Apr 13, 20:05 UTCApr 13, 20:20 UTC15m
2026-04-13 MACH69 - Apr 13, 19:25 UTCApr 13, 19:35 UTC10m
2026-04-13 ICEMAN1 - Apr 13, 16:50 UTCApr 13, 17:40 UTC50m
2026-04-13 ANARCH2 - Apr 13, 13:55 UTCApr 13, 14:45 UTC50m
2026-04-12 RANDY11 - Apr 12, 19:20 UTCApr 12, 20:05 UTC45m
2026-04-12 RANDY11 - Apr 12, 17:15 UTCApr 12, 17:30 UTC15m

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 68-8136 page for operator, model, and routing details .

Mode-S ADFF5C frequently asked

What is Mode-S code ADFF5C?
ADFF5C is an ICAO 24-bit transponder address. Assigned to 68-8136.
Is ADFF5C 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 ADFF5C, octal 53377534, decimal 11,403,100.
What flights does ADFF5C operate?
Mode-S ADFF5C has broadcast 4 distinct callsigns, including RANDY11, MACH69, ICEMAN1, ANARCH2.