Apparatus

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sensors Mode-S transponder

A4C5D8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4064J · AIRBUS A-321neo · operated by JETBLUE AIRWAYS CORP

Hex
A4C5D8
Octal
51142730
Decimal
10,798,552
Country
US
Tail
N4064J
Type
A21N
Broadcasting now · callsign JBU332 · 18,425 ft
Flights observed
256
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:00 UTC

Current position

A4C5D8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4C5D8 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
JBU1408 - 24 2026-07-21
JBU33 JetBlue Airways 19 2026-07-21
JBU1621 - 18 2026-07-09
JBU1407 JetBlue Airways 18 2026-07-25
JBU7 JetBlue Airways 17 2026-07-22
JBU2261 JetBlue Airways 15 2026-07-26
JBU2260 JetBlue Airways 15 2026-07-26
JBU2220 JetBlue Airways 13 2026-07-24
JBU20 JetBlue Airways 13 2026-07-22
JBU1620 - 13 2026-07-08
JBU1107 JetBlue Airways 11 2026-07-23
JBU332 - 10 2026-07-12
JBU331 JetBlue Airways 9 2026-07-09
JBU346 - 6 2026-07-20
JBU345 - 6 2026-07-20
JBU34 - 5 2026-07-02
JBU32 - 5 2026-06-21
JBU31 - 5 2026-06-21
JBU123 - 5 2026-04-13
JBU588 JetBlue Airways 4 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JBU2260 MAD → BOS Jul 26, 12:45 UTCJul 26, 19:45 UTC7h 0m
2026-07-26 JBU2260 MAD → BOS Jul 26, 12:44 UTCJul 26, 20:00 UTC7h 17m
2026-07-26 JBU2261 LGA → PBI Jul 26, 02:35 UTCJul 26, 09:15 UTC6h 41m
2026-07-25 JBU1407 JFK → CDG Jul 25, 00:10 UTCJul 25, 20:35 UTC20h 25m
2026-07-25 JBU1407 JFK → CDG Jul 25, 00:10 UTCJul 25, 02:00 UTC1h 50m
2026-07-24 JBU2220 LHR → JFK Jul 24, 07:40 UTCJul 24, 14:35 UTC6h 55m
2026-07-23 JBU1107 JFK → LHR Jul 23, 13:25 UTCJul 23, 19:35 UTC6h 10m
2026-07-22 JBU20 LHR → JFK Jul 22, 11:55 UTCJul 22, 19:05 UTC7h 10m
2026-07-22 JBU20 LHR → JFK Jul 22, 11:51 UTCJul 22, 19:10 UTC7h 19m
2026-07-22 JBU7 JFK → LHR Jul 22, 02:40 UTCJul 22, 04:25 UTC1h 45m
2026-07-21 JBU1408 CDG → JFK Jul 21, 10:50 UTCJul 21, 18:25 UTC7h 35m
2026-07-21 JBU33 BOS → SFO Jul 21, 01:35 UTCJul 21, 08:00 UTC6h 25m
2026-07-20 JBU346 BCN → BOS Jul 20, 11:20 UTCJul 20, 19:25 UTC8h 5m
2026-07-20 JBU345 BOS → BCN Jul 20, 01:05 UTCJul 20, 08:20 UTC7h 16m
2026-07-20 JBU345 BOS → BCN Jul 20, 01:05 UTCJul 20, 08:10 UTC7h 5m
2026-07-19 JBU2261 BOS → MAD Jul 19, 03:45 UTCJul 20, 02:00 UTC22h 16m
2026-07-19 JBU2261 - Jul 19, 03:45 UTCJul 19, 04:45 UTC1h 0m
2026-07-17 JBU1407 JFK → CDG Jul 17, 23:53 UTCJul 18, 16:50 UTC16h 58m
2026-07-17 JBU2220 - Jul 17, 07:30 UTCJul 17, 08:00 UTC30m
2026-07-17 JBU2220 LHR → JFK Jul 17, 07:29 UTCJul 18, 06:00 UTC22h 32m
2026-07-16 JBU1107 JFK → LHR Jul 16, 13:10 UTCJul 16, 20:00 UTC6h 50m
2026-07-16 JBU1107 JFK → LHR Jul 16, 13:10 UTCJul 16, 20:09 UTC7h 0m
2026-07-15 JBU7 JFK → LHR Jul 15, 01:27 UTCJul 15, 18:40 UTC17h 13m
2026-07-15 JBU7 - Jul 15, 01:30 UTCJul 15, 08:45 UTC7h 15m
2026-07-14 JBU1408 YCL → JFK Jul 14, 20:05 UTCJul 14, 21:30 UTC1h 25m
2026-07-14 JBU1408 - Jul 14, 13:55 UTCJul 14, 20:00 UTC6h 5m
2026-07-14 JBU33 BOS → CDG Jul 14, 03:25 UTCJul 14, 10:35 UTC7h 10m
2026-07-13 JBU1534 SFO → BOS Jul 13, 19:25 UTCJul 14, 00:45 UTC5h 20m
2026-07-13 JBU1333 BOS → SFO Jul 13, 12:00 UTCJul 13, 17:40 UTC5h 40m
2026-07-13 JBU1333 - Jul 13, 11:10 UTCJul 13, 11:15 UTC5m
2026-07-12 JBU332 MXP → BOS Jul 12, 10:15 UTCJul 13, 01:05 UTC14h 51m
2026-07-12 JBU332 MXP → BOS Jul 12, 10:15 UTCJul 13, 01:05 UTC14h 51m
2026-07-11 JBU346 BCN → BOS Jul 11, 12:06 UTCJul 12, 12:01 UTC23h 55m
2026-07-11 JBU346 - Jul 11, 12:10 UTCJul 11, 14:00 UTC1h 50m
2026-07-11 JBU345 - Jul 11, 00:50 UTCJul 11, 07:50 UTC7h 0m
2026-07-09 JBU331 BDL → MCO Jul 9, 22:25 UTCJul 9, 23:35 UTC1h 10m
2026-07-09 JBU331 BDL → MCO Jul 9, 22:24 UTCJul 10, 20:30 UTC22h 6m
2026-07-09 JBU1621 LHR → BOS Jul 9, 08:05 UTCJul 9, 15:00 UTC6h 55m
2026-07-08 JBU1620 BOS → LHR Jul 8, 22:50 UTCJul 9, 05:15 UTC6h 25m
2026-07-08 JBU2261 BOS → MAD Jul 8, 02:45 UTCJul 9, 00:10 UTC21h 26m
2026-07-07 JBU1621 - Jul 7, 09:45 UTCJul 7, 17:05 UTC7h 20m
2026-07-07 JBU1621 LHR → BOS Jul 7, 09:44 UTCJul 8, 08:00 UTC22h 17m
2026-07-06 JBU1620 - Jul 6, 23:10 UTCJul 7, 05:20 UTC6h 10m
2026-07-06 JBU1407 JFK → CDG Jul 6, 02:25 UTCJul 7, 00:30 UTC22h 5m
2026-07-05 JBU1408 MIA → EWR Jul 5, 14:30 UTCJul 5, 22:30 UTC8h 0m
2026-07-05 JBU1408 MIA → EWR Jul 5, 14:27 UTCJul 6, 13:00 UTC22h 33m
2026-07-05 JBU33 BOS → CDG Jul 5, 01:48 UTCJul 5, 03:00 UTC1h 12m
2026-07-05 JBU33 BOS → CDG Jul 5, 01:50 UTCJul 5, 08:15 UTC6h 25m
2026-07-04 JBU332 MXP → BOS Jul 4, 09:23 UTCJul 5, 08:00 UTC22h 37m
2026-07-04 JBU332 MXP → BOS Jul 4, 09:25 UTCJul 4, 17:45 UTC8h 20m

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 N4064J page for operator, model, and routing details .

Mode-S A4C5D8 frequently asked

What is Mode-S code A4C5D8?
A4C5D8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4064J.
Where is Mode-S A4C5D8 registered?
Mode-S code A4C5D8 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 A4C5D8 broadcasting right now?
Yes. Mode-S A4C5D8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C5D8, octal 51142730, decimal 10,798,552.
What flights does A4C5D8 operate?
Mode-S A4C5D8 has broadcast 20 distinct callsigns, including JBU1408, JBU33, JBU1621, JBU1407, JBU7.