Apparatus

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sensors Mode-S transponder

AD5329

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N958JB · AIRBUS A-321 · operated by JETBLUE AIRWAYS CORP

Hex
AD5329
Octal
53251451
Decimal
11,359,017
Country
US
Tail
N958JB
Type
A321
Photo of N958JB
Transponder active on ground
Flights observed
5
Distinct callsigns
2
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AD5329.

Country allocation

The ICAO 24-bit address AD5329 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 2 distinct

Callsign Airline Flights Last seen
JBU350 - 3 2026-04-13
JBU149 - 2 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 JBU350 - Apr 13, 20:30 UTCApr 13, 23:45 UTC3h 15m
2026-04-13 JBU350 - Apr 13, 19:45 UTCApr 13, 19:55 UTC10m
2026-04-13 JBU350 - Apr 13, 19:40 UTCApr 13, 19:55 UTC15m
2026-04-13 JBU149 - Apr 13, 16:25 UTCApr 13, 17:30 UTC1h 5m
2026-04-13 JBU149 - Apr 13, 13:29 UTCApr 13, 14:05 UTC37m

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 N958JB page for operator, model, and routing details .

Mode-S AD5329 frequently asked

What is Mode-S code AD5329?
AD5329 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N958JB.
Where is Mode-S AD5329 registered?
Mode-S code AD5329 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 AD5329 broadcasting right now?
Mode-S AD5329 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD5329, octal 53251451, decimal 11,359,017.
What flights does AD5329 operate?
Mode-S AD5329 has broadcast 2 distinct callsigns, including JBU350, JBU149.