Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADFF81

ICAO 24-bit transponder address

Currently assigned to 68-8101 · Northrop T-38C Talon

Hex
ADFF81
Octal
53377601
Decimal
11,403,137
Tail
68-8101
Type
T38
No current signal · last broadcast 21d ago
Flights observed
4
Distinct callsigns
3
Country
-
Last broadcast
21d ago

Last known position

Most recent position reported by Mode-S ADFF81.

Callsign history 3 distinct

Callsign Airline Flights Last seen
NINJA12 - 2 2026-05-12
TORCH05 - 1 2026-04-22
EAGLE12 - 1 2026-04-22

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-12 NINJA12 - May 12, 16:15 UTCMay 12, 16:50 UTC35m
2026-05-11 NINJA12 - May 11, 16:05 UTCMay 11, 16:35 UTC30m
2026-04-22 EAGLE12 - Apr 22, 17:10 UTCApr 22, 17:30 UTC20m
2026-04-22 TORCH05 - Apr 22, 13:30 UTCApr 22, 14:00 UTC30m

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 68-8101 page for operator, model, and routing details .

Mode-S ADFF81 frequently asked

What is Mode-S code ADFF81?
ADFF81 is an ICAO 24-bit transponder address. Assigned to 68-8101.
Is ADFF81 broadcasting right now?
No active broadcast right now. Last signal was 21d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADFF81, octal 53377601, decimal 11,403,137.
What flights does ADFF81 operate?
Mode-S ADFF81 has broadcast 3 distinct callsigns, including NINJA12, TORCH05, EAGLE12.