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
- Flights observed
- 350
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 26, 22:30 UTC
Last known 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 |
| JBU1883 | - | 6 | 2026-07-18 |
| 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 |
| 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 |
| JBU677 | JetBlue Airways | 3 | 2026-07-24 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | JBU419 | JFK → ATL | Jul 26, 20:30 UTC | Jul 26, 22:15 UTC | 1h 45m |
| 2026-07-26 | JBU184 | RDU → BOS | Jul 26, 15:45 UTC | Jul 26, 17:55 UTC | 2h 10m |
| 2026-07-26 | JBU737 | BDL → MCO | Jul 26, 11:35 UTC | Jul 26, 14:05 UTC | 2h 30m |
| 2026-07-25 | JBU521 | BOS → JFK | Jul 25, 18:00 UTC | Jul 25, 18:45 UTC | 45m |
| 2026-07-25 | JBU521 | BOS → JFK | Jul 25, 17:58 UTC | Jul 26, 16:30 UTC | 22h 33m |
| 2026-07-25 | JBU1085 | BUF → MCO | Jul 25, 14:00 UTC | Jul 25, 16:15 UTC | 2h 15m |
| 2026-07-25 | JBU1086 | DTW → BOS | Jul 25, 10:30 UTC | Jul 25, 12:50 UTC | 2h 20m |
| 2026-07-25 | JBU1083 | JFK → MCO | Jul 25, 02:25 UTC | Jul 25, 04:35 UTC | 2h 10m |
| 2026-07-24 | JBU678 | JAX → JFK | Jul 24, 21:45 UTC | Jul 24, 23:35 UTC | 1h 50m |
| 2026-07-24 | JBU677 | JFK → JAX | Jul 24, 18:10 UTC | Jul 24, 20:05 UTC | 1h 55m |
| 2026-07-22 | JBU678 | JAX → JFK | Jul 22, 21:55 UTC | Jul 22, 22:30 UTC | 35m |
| 2026-07-22 | JBU677 | - | Jul 22, 18:40 UTC | Jul 22, 20:35 UTC | 1h 55m |
| 2026-07-22 | JBU677 | JFK → JAX | Jul 22, 18:36 UTC | Jul 23, 05:05 UTC | 10h 29m |
| 2026-07-22 | JBU142 | GCM → BOS | Jul 22, 15:05 UTC | Jul 22, 16:50 UTC | 1h 45m |
| 2026-07-22 | JBU249 | SAV → BOS | Jul 22, 11:45 UTC | Jul 22, 14:05 UTC | 2h 20m |
| 2026-07-21 | JBU2116 | SFO → JFK | Jul 21, 15:10 UTC | Jul 21, 16:25 UTC | 1h 15m |
| 2026-07-21 | JBU2115 | JFK → SFO | Jul 21, 12:40 UTC | Jul 21, 13:50 UTC | 1h 10m |
| 2026-07-20 | JBU8358 | - | Jul 20, 16:00 UTC | Jul 20, 16:25 UTC | 25m |
| 2026-07-20 | JBU8358 | ACK → BOS | Jul 20, 15:56 UTC | Jul 21, 13:50 UTC | 21h 54m |
| 2026-07-18 | JBU1352 | BOS → ACK | Jul 18, 16:16 UTC | Jul 18, 16:40 UTC | 25m |
| 2026-07-18 | JBU484 | RDU → BOS | Jul 18, 13:31 UTC | Jul 18, 16:40 UTC | 3h 10m |
| 2026-07-18 | JBU1883 | BOS → RDU | Jul 18, 10:37 UTC | Jul 18, 16:40 UTC | 6h 4m |
| 2026-07-18 | JBU1883 | BOS → RDU | Jul 18, 10:40 UTC | Jul 18, 12:10 UTC | 1h 30m |
| 2026-07-14 | JBU2468 | CHS → BOS | Jul 14, 21:26 UTC | Jul 15, 11:20 UTC | 13h 54m |
| 2026-07-14 | JBU2355 | BOS → DCA | Jul 14, 12:45 UTC | Jul 15, 11:20 UTC | 22h 35m |
| 2026-07-13 | JBU932 | IAH → BOS | Jul 13, 19:44 UTC | Jul 14, 18:30 UTC | 22h 47m |
| 2026-07-13 | JBU2033 | BOS → IAH | Jul 13, 13:29 UTC | Jul 14, 12:30 UTC | 23h 2m |
| 2026-07-13 | JBU2033 | - | Jul 13, 13:30 UTC | Jul 13, 16:30 UTC | 3h 0m |
| 2026-07-12 | JBU2230 | - | Jul 12, 14:40 UTC | Jul 12, 16:30 UTC | 1h 50m |
| 2026-07-12 | JBU2230 | MKE → BOS | Jul 12, 14:36 UTC | Jul 13, 14:30 UTC | 23h 55m |
| 2026-07-12 | JBU2229 | - | Jul 12, 11:15 UTC | Jul 12, 13:20 UTC | 2h 5m |
| 2026-07-11 | JBU68 | - | Jul 11, 17:45 UTC | Jul 11, 18:30 UTC | 45m |
| 2026-07-11 | JBU267 | BOS → CHS | Jul 11, 14:37 UTC | Jul 12, 13:20 UTC | 22h 44m |
| 2026-07-11 | JBU267 | - | Jul 11, 14:40 UTC | Jul 11, 16:35 UTC | 1h 55m |
| 2026-07-11 | JBU207 | PQI → BOS | Jul 11, 09:55 UTC | Jul 11, 10:50 UTC | 55m |
| 2026-07-10 | JBU793 | BOS → DEN | Jul 10, 15:38 UTC | Jul 11, 14:30 UTC | 22h 53m |
| 2026-07-10 | JBU793 | BOS → DEN | Jul 10, 15:40 UTC | Jul 10, 19:50 UTC | 4h 10m |
| 2026-07-10 | JBU2322 | - | Jul 10, 01:05 UTC | Jul 10, 03:55 UTC | 2h 50m |
| 2026-07-09 | JBU2321 | - | Jul 9, 21:00 UTC | Jul 9, 23:45 UTC | 2h 45m |
| 2026-07-09 | JBU810 | - | Jul 9, 01:50 UTC | Jul 9, 04:00 UTC | 2h 10m |
| 2026-07-09 | JBU810 | JAX → BOS | Jul 9, 01:46 UTC | Jul 9, 23:45 UTC | 22h 0m |
| 2026-07-08 | JBU509 | - | Jul 8, 22:30 UTC | Jul 9, 00:50 UTC | 2h 20m |
| 2026-07-08 | JBU509 | BOS → BOS | Jul 8, 20:25 UTC | Jul 8, 20:30 UTC | 5m |
| 2026-07-08 | JBU252 | MCO → BOS | Jul 8, 17:15 UTC | Jul 8, 19:45 UTC | 2h 30m |
| 2026-07-08 | JBU1406 | MCO → MCO | Jul 8, 09:20 UTC | Jul 8, 15:20 UTC | 6h 0m |
| 2026-07-07 | JBU51 | BOS → MCO | Jul 7, 16:25 UTC | Jul 8, 14:30 UTC | 22h 6m |
| 2026-07-07 | JBU1282 | - | Jul 7, 13:55 UTC | Jul 7, 15:00 UTC | 1h 5m |
| 2026-07-07 | JBU1282 | RIC → BOS | Jul 7, 13:52 UTC | Jul 8, 10:00 UTC | 20h 9m |
| 2026-07-06 | JBU204 | BDA → BOS | Jul 6, 15:58 UTC | Jul 7, 14:30 UTC | 22h 33m |
| 2026-07-06 | JBU2468 | BOS → BOS | Jul 6, 12:50 UTC | Jul 6, 17:55 UTC | 5h 5m |
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 .