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
- 283
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 1h ago
Current 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 |
|---|---|---|---|
| JBU934 | - | 5 | 2026-07-09 |
| JBU128 | JetBlue Airways | 5 | 2026-07-08 |
| JBU68 | JetBlue Airways | 4 | 2026-06-06 |
| JBU654 | JetBlue Airways | 4 | 2026-04-27 |
| JBU1484 | JetBlue Airways | 4 | 2026-05-16 |
| JBU862 | JetBlue Airways | 3 | 2026-06-10 |
| JBU720 | JetBlue Airways | 3 | 2026-05-14 |
| JBU716 | JetBlue Airways | 3 | 2026-06-07 |
| JBU53 | - | 3 | 2026-07-13 |
| JBU519 | JetBlue Airways | 3 | 2026-06-19 |
| JBU450 | JetBlue Airways | 3 | 2026-05-15 |
| JBU401 | JetBlue Airways | 3 | 2026-05-26 |
| JBU311 | - | 3 | 2026-06-24 |
| JBU2768 | - | 3 | 2026-06-20 |
| JBU2602 | - | 3 | 2026-06-29 |
| JBU254 | - | 3 | 2026-06-25 |
| JBU244 | JetBlue Airways | 3 | 2026-06-01 |
| JBU21 | - | 3 | 2026-07-05 |
| JBU1602 | JetBlue Airways | 3 | 2026-05-22 |
| JBU1520 | JetBlue Airways | 3 | 2026-06-19 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | JBU53 | - | Jul 13, 18:20 UTC | Jul 13, 20:35 UTC | 2h 15m |
| 2026-07-13 | JBU53 | - | Jul 13, 18:19 UTC | Jul 14, 11:15 UTC | 16h 57m |
| 2026-07-13 | JBU2786 | - | Jul 13, 15:35 UTC | Jul 13, 16:40 UTC | 1h 5m |
| 2026-07-12 | JBU625 | JFK → TPA | Jul 12, 20:31 UTC | Jul 13, 19:15 UTC | 22h 45m |
| 2026-07-12 | JBU184 | MCO → JFK | Jul 12, 15:30 UTC | Jul 13, 14:15 UTC | 22h 46m |
| 2026-07-12 | JBU438 | MCO → BDL | Jul 12, 00:21 UTC | Jul 12, 22:55 UTC | 22h 35m |
| 2026-07-11 | JBU522 | MBJ → MCO | Jul 11, 20:40 UTC | Jul 12, 17:45 UTC | 21h 6m |
| 2026-07-11 | JBU522 | - | Jul 11, 17:45 UTC | Jul 11, 22:20 UTC | 4h 35m |
| 2026-07-10 | JBU334 | - | Jul 10, 23:05 UTC | Jul 11, 00:15 UTC | 1h 10m |
| 2026-07-10 | JBU334 | - | Jul 10, 21:15 UTC | Jul 10, 21:30 UTC | 15m |
| 2026-07-10 | JBU1033 | - | Jul 10, 19:45 UTC | Jul 10, 20:05 UTC | 20m |
| 2026-07-10 | JBU1033 | - | Jul 10, 17:25 UTC | Jul 10, 18:05 UTC | 40m |
| 2026-07-10 | JBU605 | MCO → MCO | Jul 10, 09:20 UTC | Jul 10, 15:40 UTC | 6h 20m |
| 2026-07-09 | JBU730 | - | Jul 9, 18:50 UTC | Jul 9, 19:25 UTC | 35m |
| 2026-07-09 | JBU730 | MCO → BQN | Jul 9, 18:47 UTC | Jul 10, 17:15 UTC | 22h 28m |
| 2026-07-09 | JBU934 | - | Jul 9, 16:35 UTC | Jul 9, 17:30 UTC | 55m |
| 2026-07-09 | JBU934 | - | Jul 9, 14:55 UTC | Jul 9, 15:05 UTC | 10m |
| 2026-07-09 | JBU2133 | - | Jul 9, 12:40 UTC | Jul 9, 13:05 UTC | 25m |
| 2026-07-09 | JBU2133 | - | Jul 9, 10:25 UTC | Jul 9, 11:05 UTC | 40m |
| 2026-07-09 | JBU1727 | EWR → MCO | Jul 9, 03:30 UTC | Jul 9, 05:35 UTC | 2h 5m |
| 2026-07-08 | JBU128 | MCO → EWR | Jul 8, 20:45 UTC | Jul 8, 22:55 UTC | 2h 10m |
| 2026-07-08 | JBU1083 | JFK → MCO | Jul 8, 01:28 UTC | Jul 8, 22:55 UTC | 21h 28m |
| 2026-07-08 | JBU1083 | JFK → MCO | Jul 8, 01:30 UTC | Jul 8, 03:40 UTC | 2h 10m |
| 2026-07-07 | JBU98 | DEN → JFK | Jul 7, 20:15 UTC | Jul 7, 23:45 UTC | 3h 30m |
| 2026-07-07 | JBU97 | JFK → DEN | Jul 7, 05:10 UTC | Jul 7, 08:30 UTC | 3h 20m |
| 2026-07-06 | JBU854 | - | Jul 6, 10:55 UTC | Jul 6, 13:20 UTC | 2h 25m |
| 2026-07-05 | JBU21 | - | Jul 5, 18:45 UTC | Jul 5, 21:30 UTC | 2h 45m |
| 2026-07-05 | JBU21 | DCA → BOS | Jul 5, 15:15 UTC | Jul 5, 16:15 UTC | 1h 0m |
| 2026-07-04 | JBU128 | MCO → EWR | Jul 4, 19:40 UTC | Jul 4, 22:00 UTC | 2h 20m |
| 2026-07-04 | JBU128 | MCO → EWR | Jul 4, 19:38 UTC | Jul 5, 19:15 UTC | 23h 37m |
| 2026-07-04 | JBU934 | - | Jul 4, 17:00 UTC | Jul 4, 18:00 UTC | 1h 0m |
| 2026-07-03 | JBU128 | MCO → EWR | Jul 3, 19:45 UTC | Jul 3, 22:30 UTC | 2h 45m |
| 2026-07-03 | JBU128 | MCO → EWR | Jul 3, 19:42 UTC | Jul 4, 19:15 UTC | 23h 34m |
| 2026-07-03 | JBU934 | - | Jul 3, 17:05 UTC | Jul 3, 17:50 UTC | 45m |
| 2026-07-03 | JBU934 | - | Jul 3, 15:20 UTC | Jul 3, 15:30 UTC | 10m |
| 2026-07-02 | JBU1355 | BOS → DCA | Jul 2, 20:29 UTC | Jul 3, 18:00 UTC | 21h 31m |
| 2026-07-02 | JBU1254 | DCA → BOS | Jul 2, 18:01 UTC | Jul 3, 17:15 UTC | 23h 15m |
| 2026-07-02 | JBU2493 | ACK → DCA | Jul 2, 15:17 UTC | Jul 3, 12:00 UTC | 20h 43m |
| 2026-07-02 | JBU2121 | - | Jul 2, 13:05 UTC | Jul 2, 13:45 UTC | 40m |
| 2026-07-01 | JBU855 | - | Jul 1, 17:30 UTC | Jul 1, 18:40 UTC | 1h 10m |
| 2026-07-01 | JBU855 | BOS → DCA | Jul 1, 17:29 UTC | Jul 2, 16:35 UTC | 23h 7m |
| 2026-07-01 | JBU806 | - | Jul 1, 13:55 UTC | Jul 1, 16:05 UTC | 2h 10m |
| 2026-06-30 | JBU793 | BOS → DEN | Jun 30, 15:56 UTC | Jul 1, 15:15 UTC | 23h 20m |
| 2026-06-30 | JBU1192 | - | Jun 30, 11:35 UTC | Jun 30, 14:30 UTC | 2h 55m |
| 2026-06-30 | JBU1192 | TPA → BOS | Jun 30, 11:34 UTC | Jul 1, 11:15 UTC | 23h 41m |
| 2026-06-30 | JBU591 | - | Jun 30, 01:14 UTC | Jun 30, 03:50 UTC | 2h 36m |
| 2026-06-29 | JBU592 | TPA → BOS | Jun 29, 21:09 UTC | Jun 29, 23:44 UTC | 2h 35m |
| 2026-06-29 | JBU2152 | - | Jun 29, 16:55 UTC | Jun 29, 20:00 UTC | 3h 5m |
| 2026-06-29 | JBU2601 | - | Jun 29, 15:14 UTC | Jun 29, 15:34 UTC | 20m |
| 2026-06-29 | JBU2601 | - | Jun 29, 12:20 UTC | Jun 29, 12:55 UTC | 35m |
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 .