Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ADFF61

ICAO 24-bit transponder address

Currently assigned to 68-8213 · Northrop T-38C Talon

Hex
ADFF61
Octal
53377541
Decimal
11,403,105
Tail
68-8213
Type
T38
No current signal · last broadcast 1d ago
Flights observed
2
Distinct callsigns
2
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ADFF61.

Callsign history 2 distinct

Callsign Airline Flights Last seen
SPUR80 - 1 2026-04-13
COBRA68 - 1 2026-04-13

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-13 COBRA68 - Apr 13, 17:55 UTCApr 13, 18:40 UTC45m
2026-04-13 SPUR80 RND → RND Apr 13, 14:35 UTCApr 13, 15:20 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 68-8213 page for operator, model, and routing details .

Mode-S ADFF61 frequently asked

What is Mode-S code ADFF61?
ADFF61 is an ICAO 24-bit transponder address. Assigned to 68-8213.
Is ADFF61 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 ADFF61, octal 53377541, decimal 11,403,105.
What flights does ADFF61 operate?
Mode-S ADFF61 has broadcast 2 distinct callsigns, including SPUR80, COBRA68.