sensors Mode-S transponder
A37F8D
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N3240J · operated by JETBLUE AIRWAYS CORP
- Hex
- A37F8D
- Octal
- 50677615
- Decimal
- 10,715,021
- Country
- US
- Tail
- N3240J
- Type
- BCS3
- Flights observed
- 141
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address A37F8D 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 |
|---|---|---|---|
| JBU654 | JetBlue Airways | 4 | 2026-04-27 |
| JBU1484 | JetBlue Airways | 4 | 2026-05-16 |
| JBU720 | JetBlue Airways | 3 | 2026-05-14 |
| JBU450 | JetBlue Airways | 3 | 2026-05-15 |
| JBU401 | JetBlue Airways | 3 | 2026-05-26 |
| JBU1602 | JetBlue Airways | 3 | 2026-05-22 |
| JBU1480 | JetBlue Airways | 3 | 2026-04-27 |
| JBU1420 | JetBlue Airways | 3 | 2026-05-07 |
| JBU783 | JetBlue Airways | 2 | 2026-04-26 |
| JBU716 | JetBlue Airways | 2 | 2026-05-12 |
| JBU68 | JetBlue Airways | 2 | 2026-05-03 |
| JBU618 | JetBlue Airways | 2 | 2026-05-07 |
| JBU551 | JetBlue Airways | 2 | 2026-05-25 |
| JBU508 | JetBlue Airways | 2 | 2026-05-22 |
| JBU400 | JetBlue Airways | 2 | 2026-05-26 |
| JBU311 | JetBlue Airways | 2 | 2026-04-17 |
| JBU2841 | - | 2 | 2026-04-13 |
| JBU2783 | JetBlue Airways | 2 | 2026-05-15 |
| JBU2722 | JetBlue Airways | 2 | 2026-04-14 |
| JBU249 | JetBlue Airways | 2 | 2026-05-15 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | JBU471 | BOS → SJC | May 29, 20:45 UTC | May 29, 23:10 UTC | 2h 25m |
| 2026-05-29 | JBU272 | FLL → LGA | May 29, 16:30 UTC | May 29, 19:00 UTC | 2h 30m |
| 2026-05-29 | JBU1071 | BOS → JFK | May 29, 10:50 UTC | May 29, 13:10 UTC | 2h 20m |
| 2026-05-28 | JBU1062 | SJU → BOS | May 28, 12:15 UTC | May 28, 14:30 UTC | 2h 15m |
| 2026-05-28 | JBU1062 | SJU → BOS | May 28, 12:11 UTC | May 29, 11:15 UTC | 23h 4m |
| 2026-05-27 | JBU2421 | BOS → PBI | May 27, 00:39 UTC | May 27, 03:24 UTC | 2h 45m |
| 2026-05-26 | JBU400 | MSY → BOS | May 26, 18:55 UTC | May 26, 21:44 UTC | 2h 50m |
| 2026-05-26 | JBU401 | BOS → MSY | May 26, 14:14 UTC | May 26, 17:35 UTC | 3h 20m |
| 2026-05-26 | JBU540 | JAX → LGA | May 26, 11:39 UTC | May 26, 12:50 UTC | 1h 10m |
| 2026-05-25 | JBU743 | JFK → ANU | May 25, 14:25 UTC | May 25, 17:45 UTC | 3h 20m |
| 2026-05-25 | JBU2584 | MCO → JFK | May 25, 10:34 UTC | May 26, 03:45 UTC | 17h 11m |
| 2026-05-25 | JBU551 | BOS → MCO | May 25, 10:35 UTC | May 25, 12:55 UTC | 2h 20m |
| 2026-05-25 | JBU551 | BOS → MCO | May 25, 01:55 UTC | May 25, 04:30 UTC | 2h 35m |
| 2026-05-24 | JBU352 | BOS → ACK | May 24, 11:50 UTC | May 24, 14:15 UTC | 2h 25m |
| 2026-05-23 | JBU1515 | JFK → SFO | May 23, 09:59 UTC | May 24, 05:35 UTC | 19h 37m |
| 2026-05-22 | JBU1202 | JFK → BUF | May 22, 21:54 UTC | May 23, 13:05 UTC | 15h 11m |
| 2026-05-22 | JBU407 | PWM → JFK | May 22, 19:14 UTC | May 23, 13:05 UTC | 17h 51m |
| 2026-05-22 | JBU508 | JFK → PWM | May 22, 16:30 UTC | May 22, 17:15 UTC | 45m |
| 2026-05-22 | JBU508 | JFK → PWM | May 22, 16:30 UTC | May 23, 13:05 UTC | 20h 35m |
| 2026-05-22 | JBU1901 | - | May 22, 14:00 UTC | May 22, 14:55 UTC | 55m |
| 2026-05-22 | JBU1602 | JFK → BUF | May 22, 12:05 UTC | May 22, 13:00 UTC | 55m |
| 2026-05-21 | JBU244 | PBI → EWR | May 21, 16:20 UTC | May 21, 18:10 UTC | 1h 50m |
| 2026-05-21 | JBU244 | PBI → EWR | May 21, 16:16 UTC | May 22, 14:55 UTC | 22h 40m |
| 2026-05-21 | JBU243 | JFK → BNA | May 21, 13:01 UTC | May 21, 14:55 UTC | 1h 55m |
| 2026-05-21 | JBU254 | DCA → BOS | May 21, 10:20 UTC | May 21, 11:00 UTC | 40m |
| 2026-05-20 | JBU2355 | BOS → DCA | May 20, 23:40 UTC | May 21, 00:55 UTC | 1h 15m |
| 2026-05-20 | JBU400 | MSY → BOS | May 20, 15:50 UTC | May 20, 18:45 UTC | 2h 55m |
| 2026-05-20 | JBU401 | BOS → MSY | May 20, 11:10 UTC | May 20, 14:20 UTC | 3h 10m |
| 2026-05-19 | JBU2901 | JFK → FLL | May 19, 15:05 UTC | May 19, 15:15 UTC | 10m |
| 2026-05-19 | JBU1602 | JFK → BUF | May 19, 12:20 UTC | May 19, 13:20 UTC | 1h 0m |
| 2026-05-19 | JBU1602 | JFK → BUF | May 19, 12:19 UTC | May 20, 11:15 UTC | 22h 57m |
| 2026-05-19 | JBU372 | FLL → LGA | May 19, 06:55 UTC | May 19, 10:50 UTC | 3h 55m |
| 2026-05-18 | JBU255 | JFK → PLS | May 18, 13:30 UTC | May 19, 13:15 UTC | 23h 45m |
| 2026-05-18 | JBU117 | BOS → ATL | May 18, 10:27 UTC | May 19, 09:15 UTC | 22h 48m |
| 2026-05-17 | JBU449 | BOS → FLL | May 17, 20:21 UTC | May 18, 18:45 UTC | 22h 24m |
| 2026-05-17 | JBU173 | FLL → PUJ | May 17, 10:38 UTC | May 18, 03:35 UTC | 16h 58m |
| 2026-05-16 | JBU1360 | KIN → JFK | May 16, 21:09 UTC | May 17, 18:15 UTC | 21h 7m |
| 2026-05-16 | JBU1359 | JFK → KIN | May 16, 14:40 UTC | May 17, 12:30 UTC | 21h 51m |
| 2026-05-16 | JBU217 | JFK → LGB | May 16, 11:46 UTC | May 17, 11:15 UTC | 23h 30m |
| 2026-05-16 | JBU1484 | RDU → BOS | May 16, 11:46 UTC | May 16, 12:31 UTC | 45m |
| 2026-05-15 | JBU1484 | RDU → BOS | May 15, 23:50 UTC | May 16, 01:25 UTC | 1h 35m |
| 2026-05-15 | JBU2783 | BOS → RDU | May 15, 21:05 UTC | May 15, 22:30 UTC | 1h 25m |
| 2026-05-15 | JBU450 | PHL → BOS | May 15, 17:20 UTC | May 15, 19:30 UTC | 2h 10m |
| 2026-05-15 | JBU249 | SAV → BOS | May 15, 13:15 UTC | May 15, 15:15 UTC | 1h 59m |
| 2026-05-15 | JBU2468 | CHS → BOS | May 15, 10:05 UTC | May 15, 12:00 UTC | 1h 55m |
| 2026-05-14 | JBU1293 | BOS → ILM | May 14, 15:36 UTC | May 15, 15:15 UTC | 23h 39m |
| 2026-05-14 | JBU318 | JFK → BOS | May 14, 13:10 UTC | May 15, 11:15 UTC | 22h 6m |
| 2026-05-14 | JBU720 | ATL → JFK | May 14, 10:17 UTC | May 15, 01:15 UTC | 14h 59m |
| 2026-05-14 | JBU1419 | BOS → JAX | May 14, 02:44 UTC | May 15, 01:15 UTC | 22h 32m |
| 2026-05-13 | JBU1360 | KIN → JFK | May 13, 19:58 UTC | May 14, 19:15 UTC | 23h 18m |
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 N3240J page for operator, model, and routing details .