sensors Mode-S transponder

A5981C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N46JT · MX-2 · operated by WORLDWIDE AVIATION SERVICES LLC

Hex
A5981C
Octal
51314034
Decimal
10,852,380
Country
US
Tail
N46JT
No current signal · last broadcast 8d ago
Flights observed
6
Distinct callsigns
1
Country
US
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S A5981C.

Country allocation

The ICAO 24-bit address A5981C falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N46JT - 6 2026-05-25

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-05-25 N46JT - May 25, 16:05 UTCMay 25, 16:20 UTC15m
2026-05-16 N46JT AND → AND May 16, 15:16 UTCMay 16, 15:31 UTC15m
2026-05-02 N46JT AND → AND May 2, 17:20 UTCMay 2, 17:40 UTC20m
2026-05-02 N46JT AND → AND May 2, 16:10 UTCMay 2, 16:20 UTC10m
2026-05-01 N46JT - May 1, 19:35 UTCMay 1, 19:50 UTC15m
2026-04-27 N46JT - Apr 27, 19:55 UTCApr 27, 20:10 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 N46JT page for operator, model, and routing details .

Mode-S A5981C frequently asked

What is Mode-S code A5981C?
A5981C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N46JT.
Where is Mode-S A5981C registered?
Mode-S code A5981C is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A5981C broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5981C, octal 51314034, decimal 10,852,380.
What flights does A5981C operate?
Mode-S A5981C has broadcast 1 distinct callsign, including N46JT.