Apparatus

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sensors Mode-S transponder

A39243

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3291J · AIRBUS A220-300 · operated by JETBLUE AIRWAYS

Hex
A39243
Octal
50711103
Decimal
10,719,811
Country
US
Tail
N3291J
Type
BCS3
Broadcasting now · callsign JBU1048 · 775 ft
Flights observed
281
Distinct callsigns
20
Country
US
Last broadcast
37m ago

Current position

A39243 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A39243 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
JBU2786 - 6 2026-07-09
JBU1206 - 5 2026-07-06
JBU405 - 4 2026-07-10
JBU2602 JetBlue Airways 4 2026-06-07
JBU249 - 4 2026-07-05
JBU206 JetBlue Airways 4 2026-05-16
JBU1715 - 4 2026-07-08
JBU854 - 3 2026-07-08
JBU68 JetBlue Airways 3 2026-05-22
JBU506 JetBlue Airways 3 2026-06-10
JBU369 JetBlue Airways 3 2026-04-14
JBU366 - 3 2026-04-14
JBU2601 JetBlue Airways 3 2026-06-07
JBU1923 JetBlue Airways 3 2026-04-29
JBU1499 JetBlue Airways 3 2026-05-20
JBU1498 - 3 2026-06-29
JBU1238 - 3 2026-07-13
JBU1053 - 3 2026-06-29
JBU994 JetBlue Airways 2 2026-06-11
JBU955 - 2 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 JBU1238 - Jul 13, 15:20 UTCJul 13, 18:55 UTC3h 35m
2026-07-13 JBU1238 AUS → BOS Jul 13, 15:18 UTCJul 14, 14:45 UTC23h 28m
2026-07-13 JBU1439 - Jul 13, 10:05 UTCJul 13, 13:35 UTC3h 30m
2026-07-12 JBU494 DEN → BOS Jul 12, 16:15 UTCJul 13, 14:45 UTC22h 31m
2026-07-12 JBU250 SAV → BOS Jul 12, 02:42 UTCJul 13, 00:15 UTC21h 34m
2026-07-11 JBU654 PLS → BOS Jul 11, 16:54 UTCJul 12, 16:45 UTC23h 52m
2026-07-11 JBU453 BOS → PLS Jul 11, 11:41 UTCJul 12, 10:45 UTC23h 5m
2026-07-10 JBU405 JFK → ORD Jul 10, 21:21 UTCJul 11, 18:45 UTC21h 25m
2026-07-10 JBU405 JFK → ORD Jul 10, 21:25 UTCJul 10, 23:25 UTC2h 0m
2026-07-10 JBU80 - Jul 10, 14:50 UTCJul 10, 19:20 UTC4h 30m
2026-07-09 JBU81 JFK → RNO Jul 9, 23:05 UTCJul 10, 22:45 UTC23h 41m
2026-07-09 JBU2291 JFK → ACK Jul 9, 18:12 UTCJul 10, 16:40 UTC22h 28m
2026-07-09 JBU2786 - Jul 9, 15:20 UTCJul 9, 16:25 UTC1h 5m
2026-07-09 JBU2786 RDU → JFK Jul 9, 15:17 UTCJul 10, 04:40 UTC13h 23m
2026-07-09 JBU2285 JFK → RDU Jul 9, 12:45 UTCJul 9, 13:55 UTC1h 10m
2026-07-09 JBU372 SLC → JFK Jul 9, 05:10 UTCJul 9, 09:05 UTC3h 55m
2026-07-08 JBU1715 - Jul 8, 14:45 UTCJul 8, 16:55 UTC2h 10m
2026-07-08 JBU1715 JFK → VRB Jul 8, 14:42 UTCJul 9, 12:45 UTC22h 4m
2026-07-08 JBU854 - Jul 8, 10:55 UTCJul 8, 13:05 UTC2h 10m
2026-07-07 JBU1381 JFK → IAH Jul 7, 13:21 UTCJul 8, 12:45 UTC23h 25m
2026-07-06 JBU1539 MVY → JFK Jul 6, 23:11 UTCJul 7, 22:10 UTC23h 0m
2026-07-06 JBU1206 ORD → JFK Jul 6, 11:15 UTCJul 6, 12:50 UTC1h 35m
2026-07-06 JBU1206 ORD → JFK Jul 6, 11:11 UTCJul 7, 10:45 UTC23h 35m
2026-07-05 JBU405 JFK → ORD Jul 5, 20:10 UTCJul 5, 22:15 UTC2h 5m
2026-07-05 JBU142 - Jul 5, 16:10 UTCJul 5, 18:00 UTC1h 50m
2026-07-05 JBU249 BOS → SAV Jul 5, 11:35 UTCJul 5, 13:35 UTC2h 0m
2026-07-04 JBU1352 BOS → ACK Jul 4, 16:34 UTCJul 5, 13:35 UTC21h 1m
2026-07-03 JBU391 BOS → TPA Jul 3, 22:14 UTCJul 4, 20:35 UTC22h 21m
2026-07-03 JBU1254 DCA → BOS Jul 3, 19:09 UTCJul 4, 18:40 UTC23h 31m
2026-07-03 JBU2493 ACK → DCA Jul 3, 15:56 UTCJul 4, 14:45 UTC22h 50m
2026-07-02 JBU2122 ACK → HPN Jul 2, 22:30 UTCJul 3, 20:45 UTC22h 15m
2026-07-02 JBU1207 - Jul 2, 10:05 UTCJul 2, 12:15 UTC2h 10m
2026-07-02 JBU1207 BOS → BNA Jul 2, 10:03 UTCJul 2, 23:15 UTC13h 12m
2026-07-01 JBU1596 - Jul 1, 17:45 UTCJul 2, 02:20 UTC8h 35m
2026-06-30 JBU1290 ILM → BOS Jun 30, 21:48 UTCJul 1, 18:15 UTC20h 28m
2026-06-30 JBU1293 BOS → ILM Jun 30, 18:39 UTCJul 1, 16:45 UTC22h 7m
2026-06-30 JBU806 BNA → BOS Jun 30, 13:43 UTCJul 1, 12:45 UTC23h 2m
2026-06-30 JBU2754 - Jun 30, 04:20 UTCJun 30, 04:45 UTC25m
2026-06-30 JBU955 JFK → DCA Jun 30, 02:29 UTCJul 1, 00:25 UTC21h 57m
2026-06-30 JBU955 JFK → DCA Jun 30, 02:30 UTCJun 30, 03:15 UTC45m
2026-06-29 JBU1498 - Jun 29, 20:30 UTCJun 29, 23:49 UTC3h 20m
2026-06-29 JBU1053 JFK → PBI Jun 29, 00:07 UTCJun 29, 22:44 UTC22h 38m
2026-06-28 JBU1054 PBI → JFK Jun 28, 18:04 UTCJun 29, 16:44 UTC22h 41m
2026-06-28 JBU247 - Jun 28, 00:39 UTCJun 28, 05:49 UTC5h 10m
2026-06-28 JBU247 BOS → SLC Jun 28, 00:38 UTCJun 28, 20:39 UTC20h 2m
2026-06-27 JBU400 MSY → BOS Jun 27, 19:19 UTCJun 27, 22:15 UTC2h 55m
2026-06-27 JBU401 - Jun 27, 14:45 UTCJun 27, 17:49 UTC3h 5m
2026-06-26 JBU2954 DCA → BOS Jun 26, 22:09 UTCJun 27, 20:44 UTC22h 36m
2026-06-26 JBU1055 BOS → DCA Jun 26, 14:34 UTCJun 27, 12:45 UTC22h 11m
2026-06-25 JBU1632 IAH → BOS Jun 25, 22:12 UTCJun 26, 20:40 UTC22h 28m

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 N3291J page for operator, model, and routing details .

Mode-S A39243 frequently asked

What is Mode-S code A39243?
A39243 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3291J.
Where is Mode-S A39243 registered?
Mode-S code A39243 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 A39243 broadcasting right now?
Yes. Mode-S A39243 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A39243, octal 50711103, decimal 10,719,811.
What flights does A39243 operate?
Mode-S A39243 has broadcast 20 distinct callsigns, including JBU2786, JBU1206, JBU405, JBU2602, JBU249.