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
- Flights observed
- 153
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 14h ago
Last known 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 |
|---|---|---|---|
| JBU206 | JetBlue Airways | 4 | 2026-05-16 |
| JBU68 | JetBlue Airways | 3 | 2026-05-22 |
| JBU369 | JetBlue Airways | 3 | 2026-04-14 |
| JBU366 | - | 3 | 2026-04-14 |
| JBU1923 | JetBlue Airways | 3 | 2026-04-29 |
| JBU1499 | JetBlue Airways | 3 | 2026-05-20 |
| JBU896 | JetBlue Airways | 2 | 2026-04-16 |
| JBU892 | JetBlue Airways | 2 | 2026-05-28 |
| JBU797 | JetBlue Airways | 2 | 2026-04-16 |
| JBU720 | JetBlue Airways | 2 | 2026-05-19 |
| JBU547 | JetBlue Airways | 2 | 2026-04-24 |
| JBU450 | JetBlue Airways | 2 | 2026-04-17 |
| JBU376 | JetBlue Airways | 2 | 2026-05-11 |
| JBU2786 | JetBlue Airways | 2 | 2026-05-24 |
| JBU2602 | - | 2 | 2026-04-13 |
| JBU2601 | - | 2 | 2026-04-13 |
| JBU249 | JetBlue Airways | 2 | 2026-04-17 |
| JBU2368 | JetBlue Airways | 2 | 2026-04-15 |
| JBU2186 | JetBlue Airways | 2 | 2026-04-26 |
| JBU2119 | JetBlue Airways | 2 | 2026-05-01 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-28 | JBU516 | RSW → BOS | May 28, 22:39 UTC | May 29, 19:45 UTC | 21h 7m |
| 2026-05-28 | JBU892 | TPA → BOS | May 28, 14:40 UTC | May 28, 17:15 UTC | 2h 35m |
| 2026-05-28 | JBU892 | TPA → BOS | May 28, 14:38 UTC | May 29, 00:00 UTC | 9h 22m |
| 2026-05-28 | JBU891 | BOS → TPA | May 28, 10:40 UTC | May 28, 13:30 UTC | 2h 50m |
| 2026-05-27 | JBU396 | PUJ → BOS | May 27, 21:40 UTC | May 28, 02:45 UTC | 5h 5m |
| 2026-05-27 | JBU95 | BOS → PUJ | May 27, 14:20 UTC | May 27, 19:55 UTC | 5h 35m |
| 2026-05-27 | JBU716 | BUF → BOS | May 27, 11:50 UTC | May 27, 12:50 UTC | 1h 0m |
| 2026-05-26 | JBU1515 | JFK → SFO | May 26, 09:57 UTC | May 27, 00:44 UTC | 14h 48m |
| 2026-05-26 | JBU1516 | JFK → SYR | May 26, 03:20 UTC | May 27, 00:44 UTC | 21h 25m |
| 2026-05-25 | JBU2032 | BDA → JFK | May 25, 18:50 UTC | May 26, 17:39 UTC | 22h 50m |
| 2026-05-25 | JBU130 | RSW → JFK | May 25, 11:01 UTC | May 26, 10:44 UTC | 23h 44m |
| 2026-05-24 | JBU2786 | RDU → JFK | May 24, 17:45 UTC | May 24, 18:45 UTC | 1h 0m |
| 2026-05-24 | JBU2786 | RDU → JFK | May 24, 17:40 UTC | May 25, 16:45 UTC | 23h 5m |
| 2026-05-24 | JBU2285 | JFK → RDU | May 24, 14:55 UTC | May 24, 16:10 UTC | 1h 15m |
| 2026-05-24 | JBU1678 | JAX → JFK | May 24, 11:20 UTC | May 24, 13:10 UTC | 1h 50m |
| 2026-05-24 | JBU1677 | JFK → JAX | May 24, 01:20 UTC | May 24, 03:20 UTC | 2h 0m |
| 2026-05-23 | JBU765 | JFK → GCM | May 23, 14:20 UTC | May 23, 22:50 UTC | 8h 30m |
| 2026-05-23 | JBU2768 | TPA → BQN | May 23, 04:21 UTC | May 24, 02:45 UTC | 22h 25m |
| 2026-05-22 | JBU68 | CHS → BOS | May 22, 16:30 UTC | May 22, 18:15 UTC | 1h 45m |
| 2026-05-22 | JBU68 | CHS → BOS | May 22, 16:27 UTC | May 23, 14:45 UTC | 22h 18m |
| 2026-05-22 | JBU267 | BOS → CHS | May 22, 12:55 UTC | May 22, 15:00 UTC | 2h 5m |
| 2026-05-21 | JBU68 | CHS → BOS | May 21, 16:08 UTC | May 22, 14:45 UTC | 22h 38m |
| 2026-05-20 | JBU1499 | BOS → DAB | May 20, 17:15 UTC | May 20, 19:40 UTC | 2h 25m |
| 2026-05-20 | JBU1499 | BOS → DAB | May 20, 17:12 UTC | May 21, 16:45 UTC | 23h 34m |
| 2026-05-20 | JBU918 | JFK → BOS | May 20, 01:20 UTC | May 20, 02:05 UTC | 45m |
| 2026-05-19 | JBU156 | PLS → JFK | May 19, 20:15 UTC | May 19, 21:35 UTC | 1h 20m |
| 2026-05-19 | JBU255 | JFK → PLS | May 19, 13:55 UTC | May 19, 15:45 UTC | 1h 50m |
| 2026-05-19 | JBU720 | ATL → JFK | May 19, 10:20 UTC | May 19, 11:40 UTC | 1h 20m |
| 2026-05-18 | JBU1906 | TPA → FLL | May 18, 11:03 UTC | May 19, 10:45 UTC | 23h 42m |
| 2026-05-18 | JBU1905 | FLL → TPA | May 18, 01:18 UTC | May 19, 00:45 UTC | 23h 27m |
| 2026-05-17 | JBU1158 | LIR → FLL | May 17, 19:03 UTC | May 18, 18:45 UTC | 23h 42m |
| 2026-05-17 | JBU1157 | FLL → LIR | May 17, 15:24 UTC | May 18, 14:45 UTC | 23h 22m |
| 2026-05-17 | JBU1822 | BOS → PBI | May 17, 12:20 UTC | May 17, 13:45 UTC | 1h 25m |
| 2026-05-17 | JBU1822 | BOS → PBI | May 17, 12:20 UTC | May 18, 02:05 UTC | 13h 46m |
| 2026-05-16 | JBU207 | BOS → BNA | May 16, 09:55 UTC | May 16, 22:20 UTC | 12h 25m |
| 2026-05-16 | JBU206 | BNA → BOS | May 16, 02:15 UTC | May 16, 03:10 UTC | 55m |
| 2026-05-16 | JBU206 | BNA → BOS | May 16, 02:14 UTC | May 16, 22:20 UTC | 20h 6m |
| 2026-05-15 | JBU1782 | VPS → BOS | May 15, 22:20 UTC | May 16, 00:55 UTC | 2h 35m |
| 2026-05-15 | JBU1781 | BOS → MCO | May 15, 16:50 UTC | May 15, 19:20 UTC | 2h 30m |
| 2026-05-15 | JBU318 | JFK → BOS | May 15, 14:45 UTC | May 15, 15:20 UTC | 34m |
| 2026-05-15 | JBU720 | ATL → JFK | May 15, 10:30 UTC | May 15, 11:50 UTC | 1h 20m |
| 2026-05-15 | JBU2737 | JFK → LAX | May 15, 02:10 UTC | May 15, 03:40 UTC | 1h 30m |
| 2026-05-14 | JBU1500 | DAB → BOS | May 14, 22:25 UTC | May 15, 00:45 UTC | 2h 20m |
| 2026-05-14 | JBU1499 | BOS → DAB | May 14, 18:15 UTC | May 14, 20:50 UTC | 2h 35m |
| 2026-05-13 | JBU374 | BNA → JFK | May 13, 12:05 UTC | May 14, 10:20 UTC | 22h 16m |
| 2026-05-12 | JBU1500 | DAB → BOS | May 12, 21:51 UTC | May 13, 20:45 UTC | 22h 55m |
| 2026-05-12 | JBU1286 | PIT → BOS | May 12, 14:06 UTC | May 13, 12:45 UTC | 22h 40m |
| 2026-05-11 | JBU1880 | FLL → DCA | May 11, 20:34 UTC | May 12, 18:45 UTC | 22h 12m |
| 2026-05-11 | JBU1593 | FLL → NAS | May 11, 15:26 UTC | May 12, 14:45 UTC | 23h 20m |
| 2026-05-11 | JBU376 | SJU → BDL | May 11, 00:28 UTC | May 11, 22:35 UTC | 22h 7m |
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 .