Apparatus

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sensors Mode-S transponder

A37842

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3221J · operated by JETBLUE AIRWAYS CORP

Hex
A37842
Octal
50674102
Decimal
10,713,154
Country
US
Tail
N3221J
Type
BCS3
Broadcasting now · callsign JBU248 · 35,000 ft
Flights observed
325
Distinct callsigns
20
Country
US
Last broadcast
47m ago

Current position

A37842 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A37842 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
JBU203 - 9 2026-07-04
JBU204 - 7 2026-07-06
JBU810 - 5 2026-07-09
JBU2230 - 5 2026-07-12
JBU940 JetBlue Airways 4 2026-05-17
JBU71 JetBlue Airways 4 2026-04-27
JBU509 - 4 2026-07-08
JBU493 - 4 2026-06-21
JBU379 JetBlue Airways 4 2026-05-20
JBU2783 - 4 2026-06-29
JBU1883 JetBlue Airways 4 2026-06-04
JBU1782 - 4 2026-06-13
JBU1192 - 4 2026-07-02
JBU1155 JetBlue Airways 4 2026-05-20
JBU883 JetBlue Airways 3 2026-05-18
JBU797 - 3 2026-04-13
JBU796 - 3 2026-04-13
JBU72 JetBlue Airways 3 2026-04-16
JBU717 JetBlue Airways 3 2026-04-27
JBU2784 JetBlue Airways 3 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 JBU932 IAH → BOS Jul 13, 19:44 UTCJul 14, 06:30 UTC10h 47m
2026-07-13 JBU2033 BOS → IAH Jul 13, 13:29 UTCJul 14, 06:30 UTC17h 2m
2026-07-13 JBU2033 - Jul 13, 13:30 UTCJul 13, 16:30 UTC3h 0m
2026-07-12 JBU2230 - Jul 12, 14:40 UTCJul 12, 16:30 UTC1h 50m
2026-07-12 JBU2230 MKE → BOS Jul 12, 14:36 UTCJul 13, 14:30 UTC23h 55m
2026-07-12 JBU2229 - Jul 12, 11:15 UTCJul 12, 13:20 UTC2h 5m
2026-07-11 JBU68 - Jul 11, 17:45 UTCJul 11, 18:30 UTC45m
2026-07-11 JBU267 BOS → CHS Jul 11, 14:37 UTCJul 12, 13:20 UTC22h 44m
2026-07-11 JBU267 - Jul 11, 14:40 UTCJul 11, 16:35 UTC1h 55m
2026-07-11 JBU207 PQI → BOS Jul 11, 09:55 UTCJul 11, 10:50 UTC55m
2026-07-10 JBU793 BOS → DEN Jul 10, 15:38 UTCJul 11, 14:30 UTC22h 53m
2026-07-10 JBU793 BOS → DEN Jul 10, 15:40 UTCJul 10, 19:50 UTC4h 10m
2026-07-10 JBU2322 - Jul 10, 01:05 UTCJul 10, 03:55 UTC2h 50m
2026-07-09 JBU2321 - Jul 9, 21:00 UTCJul 9, 23:45 UTC2h 45m
2026-07-09 JBU810 - Jul 9, 01:50 UTCJul 9, 04:00 UTC2h 10m
2026-07-09 JBU810 JAX → BOS Jul 9, 01:46 UTCJul 9, 23:45 UTC22h 0m
2026-07-08 JBU509 - Jul 8, 22:30 UTCJul 9, 00:50 UTC2h 20m
2026-07-08 JBU509 BOS → BOS Jul 8, 20:25 UTCJul 8, 20:30 UTC5m
2026-07-08 JBU252 MCO → BOS Jul 8, 17:15 UTCJul 8, 19:45 UTC2h 30m
2026-07-08 JBU1406 MCO → MCO Jul 8, 09:20 UTCJul 8, 15:20 UTC6h 0m
2026-07-07 JBU51 BOS → MCO Jul 7, 16:25 UTCJul 8, 14:30 UTC22h 6m
2026-07-07 JBU1282 - Jul 7, 13:55 UTCJul 7, 15:00 UTC1h 5m
2026-07-07 JBU1282 RIC → BOS Jul 7, 13:52 UTCJul 8, 10:00 UTC20h 9m
2026-07-06 JBU204 BDA → BOS Jul 6, 15:58 UTCJul 7, 14:30 UTC22h 33m
2026-07-06 JBU2468 BOS → BOS Jul 6, 12:50 UTCJul 6, 17:55 UTC5h 5m
2026-07-05 JBU2468 - Jul 5, 23:10 UTCJul 6, 00:55 UTC1h 45m
2026-07-05 JBU2467 - Jul 5, 19:35 UTCJul 5, 21:35 UTC2h 0m
2026-07-04 JBU1814 ORF → BOS Jul 4, 22:44 UTCJul 5, 21:35 UTC22h 51m
2026-07-04 JBU203 BOS → BDA Jul 4, 13:21 UTCJul 5, 12:30 UTC23h 10m
2026-07-04 JBU207 PQI → BOS Jul 4, 09:48 UTCJul 5, 08:30 UTC22h 42m
2026-07-04 JBU206 BOS → PQI Jul 4, 01:21 UTCJul 5, 00:30 UTC23h 9m
2026-07-03 JBU782 RIC → BOS Jul 3, 22:19 UTCJul 4, 20:30 UTC22h 11m
2026-07-03 JBU248 SLC → BOS Jul 3, 06:04 UTCJul 4, 02:20 UTC20h 16m
2026-07-02 JBU247 BOS → SLC Jul 2, 23:46 UTCJul 3, 22:30 UTC22h 44m
2026-07-02 JBU401 BOS → MSY Jul 2, 15:05 UTCJul 3, 13:20 UTC22h 15m
2026-07-02 JBU1192 TPA → BOS Jul 2, 10:41 UTCJul 3, 10:30 UTC23h 49m
2026-07-02 JBU591 BOS → TPA Jul 2, 03:51 UTCJul 3, 00:30 UTC20h 39m
2026-07-01 JBU2152 SJU → TPA Jul 1, 16:56 UTCJul 2, 16:30 UTC23h 35m
2026-06-30 JBU2122 ACK → HPN Jun 30, 22:10 UTCJul 1, 20:30 UTC22h 20m
2026-06-30 JBU2665 ACK → HPN Jun 30, 18:09 UTCJul 1, 15:40 UTC21h 32m
2026-06-30 JBU1281 BOS → RIC Jun 30, 11:02 UTCJun 30, 22:50 UTC11h 49m
2026-06-29 JBU1232 VRB → BOS Jun 29, 17:24 UTCJun 30, 14:30 UTC21h 7m
2026-06-29 JBU2783 BOS → RDU Jun 29, 03:25 UTCJun 29, 04:55 UTC1h 30m
2026-06-29 JBU2783 BOS → RDU Jun 29, 03:20 UTCJun 30, 02:30 UTC23h 11m
2026-06-29 JBU2754 DCA → BOS Jun 29, 00:39 UTCJun 29, 01:50 UTC1h 10m
2026-06-28 JBU1355 - Jun 28, 21:24 UTCJun 28, 22:34 UTC1h 10m
2026-06-28 JBU1355 BOS → BOS Jun 28, 19:44 UTCJun 28, 20:04 UTC20m
2026-06-28 JBU1238 - Jun 28, 15:29 UTCJun 28, 19:04 UTC3h 35m
2026-06-28 JBU1439 BOS → AUS Jun 28, 10:24 UTCJun 28, 14:19 UTC3h 55m
2026-06-27 JBU1595 - Jun 27, 18:09 UTCJun 27, 20:19 UTC2h 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 N3221J page for operator, model, and routing details .

Mode-S A37842 frequently asked

What is Mode-S code A37842?
A37842 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3221J.
Where is Mode-S A37842 registered?
Mode-S code A37842 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 A37842 broadcasting right now?
Yes. Mode-S A37842 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A37842, octal 50674102, decimal 10,713,154.
What flights does A37842 operate?
Mode-S A37842 has broadcast 20 distinct callsigns, including JBU203, JBU204, JBU810, JBU2230, JBU940.