Apparatus

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sensors Mode-S transponder

A4C96C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4073J · AIRBUS A-321neo · operated by JETBLUE AIRWAYS CORP

Hex
A4C96C
Octal
51144554
Decimal
10,799,468
Country
US
Tail
N4073J
Type
A21N
No current signal · last broadcast Jul 26, 15:15 UTC
Flights observed
242
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 15:15 UTC

Last known position

Most recent position reported by Mode-S A4C96C.

Country allocation

The ICAO 24-bit address A4C96C 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 20 distinct

Callsign Airline Flights Last seen
JBU2261 JetBlue Airways 19 2026-07-21
JBU33 JetBlue Airways 18 2026-07-23
JBU20 JetBlue Airways 18 2026-07-24
JBU2220 JetBlue Airways 17 2026-07-26
JBU7 JetBlue Airways 16 2026-07-24
JBU1620 - 15 2026-07-14
JBU34 JetBlue Airways 14 2026-07-20
JBU1407 - 14 2026-07-20
JBU1107 JetBlue Airways 14 2026-07-25
JBU2260 - 13 2026-07-21
JBU345 - 11 2026-06-17
JBU346 - 10 2026-06-17
JBU1408 JetBlue Airways 10 2026-06-20
JBU31 - 9 2026-06-19
JBU1621 JetBlue Airways 8 2026-07-22
JBU332 - 6 2026-07-06
JBU331 JetBlue Airways 6 2026-07-05
JBU32 JetBlue Airways 5 2026-05-07
JBU524 JetBlue Airways 4 2026-05-02
JBU523 JetBlue Airways 3 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JBU2220 LHR → JFK Jul 26, 07:25 UTCJul 26, 15:00 UTC7h 35m
2026-07-26 JBU2220 LHR → JFK Jul 26, 07:24 UTCJul 26, 15:15 UTC7h 52m
2026-07-25 JBU1107 JFK → LHR Jul 25, 13:05 UTCJul 25, 19:20 UTC6h 15m
2026-07-24 JBU20 LHR → JFK Jul 24, 11:25 UTCJul 24, 18:25 UTC7h 0m
2026-07-24 JBU7 JFK → LHR Jul 24, 02:10 UTCJul 24, 08:40 UTC6h 30m
2026-07-23 JBU33 BOS → SFO Jul 23, 01:53 UTCJul 23, 18:25 UTC16h 32m
2026-07-23 JBU33 BOS → SFO Jul 23, 01:55 UTCJul 23, 08:35 UTC6h 40m
2026-07-22 JBU1621 LHR → BOS Jul 22, 13:10 UTCJul 22, 14:50 UTC1h 40m
2026-07-21 JBU2260 - Jul 21, 12:30 UTCJul 21, 19:00 UTC6h 30m
2026-07-21 JBU2260 MAD → BOS Jul 21, 12:26 UTCJul 22, 05:25 UTC16h 59m
2026-07-21 JBU2261 LGA → PBI Jul 21, 02:55 UTCJul 21, 09:25 UTC6h 30m
2026-07-20 JBU34 SFO → BOS Jul 20, 11:03 UTCJul 21, 09:00 UTC21h 57m
2026-07-20 JBU34 SFO → BOS Jul 20, 11:03 UTCJul 21, 09:00 UTC21h 57m
2026-07-20 JBU1407 JFK → CDG Jul 20, 00:20 UTCJul 20, 07:20 UTC7h 0m
2026-07-20 JBU1407 JFK → CDG Jul 20, 00:19 UTCJul 20, 18:40 UTC18h 22m
2026-07-19 JBU2220 - Jul 19, 07:25 UTCJul 19, 13:00 UTC5h 35m
2026-07-19 JBU2220 LHR → JFK Jul 19, 07:24 UTCJul 20, 07:00 UTC23h 37m
2026-07-18 JBU1107 JFK → LHR Jul 18, 13:10 UTCJul 18, 19:55 UTC6h 45m
2026-07-17 JBU20 LHR → JFK Jul 17, 11:15 UTCJul 17, 18:19 UTC7h 5m
2026-07-17 JBU7 JFK → LHR Jul 17, 02:34 UTCJul 17, 09:20 UTC6h 45m
2026-07-16 JBU33 BOS → CDG Jul 16, 01:44 UTCJul 16, 18:44 UTC17h 1m
2026-07-16 JBU33 - Jul 16, 01:45 UTCJul 16, 03:00 UTC1h 15m
2026-07-14 JBU1620 - Jul 14, 23:05 UTCJul 15, 05:30 UTC6h 25m
2026-07-14 JBU1620 BOS → LHR Jul 14, 23:03 UTCJul 15, 15:05 UTC16h 2m
2026-07-14 JBU1620 BOS → BOS Jul 14, 22:30 UTCJul 14, 22:35 UTC5m
2026-07-14 JBU2261 BOS → MAD Jul 14, 02:37 UTCJul 15, 00:25 UTC21h 48m
2026-07-13 JBU34 - Jul 13, 11:15 UTCJul 13, 18:20 UTC7h 5m
2026-07-13 JBU34 CDG → BOS Jul 13, 11:13 UTCJul 14, 09:15 UTC22h 3m
2026-07-13 JBU1407 JFK → CDG Jul 13, 01:10 UTCJul 13, 08:10 UTC7h 0m
2026-07-12 JBU2220 LHR → JFK Jul 12, 07:26 UTCJul 13, 07:01 UTC23h 35m
2026-07-12 JBU2220 LHR → JFK Jul 12, 07:31 UTCJul 12, 14:35 UTC7h 5m
2026-07-11 JBU1107 JFK → LHR Jul 11, 13:34 UTCJul 12, 13:01 UTC23h 27m
2026-07-11 JBU1107 - Jul 11, 13:35 UTCJul 11, 15:00 UTC1h 25m
2026-07-10 JBU7 - Jul 10, 01:45 UTCJul 10, 03:00 UTC1h 15m
2026-07-10 JBU7 JFK → LHR Jul 10, 01:45 UTCJul 10, 19:15 UTC17h 30m
2026-07-09 JBU33 BOS → CDG Jul 9, 02:06 UTCJul 9, 19:00 UTC16h 55m
2026-07-08 JBU1621 LHR → BOS Jul 8, 08:18 UTCJul 9, 03:35 UTC19h 18m
2026-07-08 JBU1620 BOS → LHR Jul 8, 00:11 UTCJul 8, 15:15 UTC15h 4m
2026-07-07 JBU2260 - Jul 7, 12:45 UTCJul 7, 13:00 UTC15m
2026-07-07 JBU2260 MAD → BOS Jul 7, 12:45 UTCJul 8, 09:35 UTC20h 51m
2026-07-07 JBU2261 - Jul 7, 02:45 UTCJul 7, 09:20 UTC6h 35m
2026-07-06 JBU332 MXP → BOS Jul 6, 08:23 UTCJul 7, 03:50 UTC19h 27m
2026-07-05 JBU331 BDL → MCO Jul 5, 22:40 UTCJul 6, 16:45 UTC18h 5m
2026-07-05 JBU73 JFK → EDI Jul 5, 03:09 UTCJul 6, 00:05 UTC20h 57m
2026-07-04 JBU8533 BOS → JFK Jul 4, 22:40 UTCJul 4, 23:15 UTC35m
2026-07-04 JBU8533 BOS → JFK Jul 4, 22:36 UTCJul 5, 18:50 UTC20h 15m
2026-07-03 JBU1621 - Jul 3, 07:55 UTCJul 3, 09:20 UTC1h 25m
2026-07-03 JBU1621 LHR → BOS Jul 3, 07:53 UTCJul 4, 06:35 UTC22h 43m
2026-07-02 JBU1620 - Jul 2, 23:05 UTCJul 3, 05:10 UTC6h 5m
2026-07-02 JBU332 MXP → BOS Jul 2, 10:20 UTCJul 2, 18:30 UTC8h 10m

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 N4073J page for operator, model, and routing details .

Mode-S A4C96C frequently asked

What is Mode-S code A4C96C?
A4C96C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4073J.
Where is Mode-S A4C96C registered?
Mode-S code A4C96C 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 A4C96C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 15:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C96C, octal 51144554, decimal 10,799,468.
What flights does A4C96C operate?
Mode-S A4C96C has broadcast 20 distinct callsigns, including JBU2261, JBU33, JBU20, JBU2220, JBU7.