Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADFFFC

ICAO 24-bit transponder address

Currently assigned to 70-1585 · Northrop T-38C Talon

Hex
ADFFFC
Octal
53377774
Decimal
11,403,260
Tail
70-1585
Type
T38
No current signal · last broadcast 29d ago
Flights observed
4
Distinct callsigns
4
Country
-
Last broadcast
29d ago

Last known position

Most recent position reported by Mode-S ADFFFC.

Callsign history 4 distinct

Callsign Airline Flights Last seen
SPEED63 - 1 2026-05-04
GUTS31 - 1 2026-04-13
EAGLE67 - 1 2026-04-15
BASS33 - 1 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-04 SPEED63 - May 4, 17:00 UTCMay 4, 17:30 UTC30m
2026-04-15 EAGLE67 - Apr 15, 20:00 UTCApr 15, 20:20 UTC20m
2026-04-13 GUTS31 - Apr 13, 19:55 UTCApr 13, 20:10 UTC15m
2026-04-13 BASS33 - Apr 13, 16:35 UTCApr 13, 17:00 UTC25m

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 70-1585 page for operator, model, and routing details .

Mode-S ADFFFC frequently asked

What is Mode-S code ADFFFC?
ADFFFC is an ICAO 24-bit transponder address. Assigned to 70-1585.
Is ADFFFC broadcasting right now?
No active broadcast right now. Last signal was 29d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADFFFC, octal 53377774, decimal 11,403,260.
What flights does ADFFFC operate?
Mode-S ADFFFC has broadcast 4 distinct callsigns, including SPEED63, GUTS31, EAGLE67, BASS33.