sensors Mode-S transponder
AD3581
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N950JT · AIRBUS A-321 · operated by JETBLUE AIRWAYS CORP
- Hex
- AD3581
- Octal
- 53232601
- Decimal
- 11,351,425
- Country
- US
- Tail
- N950JT
- Type
- A321
- Flights observed
- 268
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address AD3581 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 |
|---|---|---|---|
| JBU574 | - | 16 | 2026-07-02 |
| JBU2173 | - | 15 | 2026-07-02 |
| JBU774 | JetBlue Airways | 8 | 2026-05-08 |
| JBU473 | JetBlue Airways | 7 | 2026-05-08 |
| JBU1347 | - | 7 | 2026-06-28 |
| JBU661 | JetBlue Airways | 6 | 2026-05-18 |
| JBU162 | - | 5 | 2026-06-29 |
| JBU2829 | JetBlue Airways | 4 | 2026-06-07 |
| JBU1830 | - | 4 | 2026-06-17 |
| JBU1829 | JetBlue Airways | 4 | 2026-05-02 |
| JBU1604 | - | 4 | 2026-06-28 |
| JBU1603 | - | 4 | 2026-07-14 |
| JBU1348 | - | 4 | 2026-06-28 |
| JBU932 | JetBlue Airways | 3 | 2026-04-17 |
| JBU904 | - | 3 | 2026-06-27 |
| JBU817 | - | 3 | 2026-07-05 |
| JBU771 | JetBlue Airways | 3 | 2026-06-10 |
| JBU769 | - | 3 | 2026-04-16 |
| JBU721 | JetBlue Airways | 3 | 2026-04-15 |
| JBU474 | - | 3 | 2026-06-18 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | JBU1603 | - | Jul 14, 12:40 UTC | Jul 14, 13:20 UTC | 40m |
| 2026-07-13 | JBU17 | - | Jul 13, 18:05 UTC | Jul 13, 22:25 UTC | 4h 20m |
| 2026-07-13 | JBU17 | JFK → POS | Jul 13, 18:05 UTC | Jul 14, 13:20 UTC | 19h 16m |
| 2026-07-12 | JBU859 | JFK → KIN | Jul 12, 20:29 UTC | Jul 13, 18:55 UTC | 22h 27m |
| 2026-07-12 | JBU859 | - | Jul 12, 20:30 UTC | Jul 12, 22:15 UTC | 1h 45m |
| 2026-07-12 | JBU1436 | - | Jul 12, 09:30 UTC | Jul 12, 17:50 UTC | 8h 20m |
| 2026-07-11 | JBU1869 | JFK → JFK | Jul 11, 16:10 UTC | Jul 12, 00:30 UTC | 8h 20m |
| 2026-07-11 | JBU937 | JFK → JFK | Jul 11, 02:25 UTC | Jul 11, 14:05 UTC | 11h 40m |
| 2026-07-10 | JBU1682 | - | Jul 10, 20:50 UTC | Jul 11, 00:15 UTC | 3h 25m |
| 2026-07-10 | JBU1681 | - | Jul 10, 14:05 UTC | Jul 10, 17:25 UTC | 3h 20m |
| 2026-07-09 | JBU168 | PUJ → JFK | Jul 9, 17:09 UTC | Jul 10, 14:45 UTC | 21h 36m |
| 2026-07-09 | JBU1936 | STI → JFK | Jul 9, 02:46 UTC | Jul 10, 02:15 UTC | 23h 29m |
| 2026-07-08 | JBU510 | SDQ → JFK | Jul 8, 14:25 UTC | Jul 9, 12:40 UTC | 22h 15m |
| 2026-07-08 | JBU209 | JFK → SDQ | Jul 8, 09:20 UTC | Jul 9, 06:05 UTC | 20h 45m |
| 2026-07-07 | JBU454 | - | Jul 7, 23:30 UTC | Jul 8, 04:40 UTC | 5h 10m |
| 2026-07-07 | JBU454 | ONT → JFK | Jul 7, 23:27 UTC | Jul 8, 22:05 UTC | 22h 39m |
| 2026-07-07 | JBU355 | JFK → ONT | Jul 7, 03:30 UTC | Jul 7, 08:35 UTC | 5h 5m |
| 2026-07-06 | JBU411 | BOS → SAN | Jul 6, 11:00 UTC | Jul 6, 15:40 UTC | 4h 40m |
| 2026-07-06 | JBU411 | BOS → SAN | Jul 6, 10:59 UTC | Jul 7, 08:35 UTC | 21h 37m |
| 2026-07-05 | JBU779 | JFK → MBJ | Jul 5, 12:22 UTC | Jul 6, 12:15 UTC | 23h 54m |
| 2026-07-05 | JBU817 | BOS → JFK | Jul 5, 03:05 UTC | Jul 5, 05:10 UTC | 2h 5m |
| 2026-07-05 | JBU817 | BOS → JFK | Jul 5, 03:05 UTC | Jul 5, 21:10 UTC | 18h 6m |
| 2026-07-04 | JBU817 | BOS → BOS | Jul 4, 21:35 UTC | Jul 4, 21:40 UTC | 5m |
| 2026-07-03 | JBU1668 | PUJ → JFK | Jul 3, 21:42 UTC | Jul 4, 20:15 UTC | 22h 33m |
| 2026-07-03 | JBU1668 | JFK → JFK | Jul 3, 17:05 UTC | Jul 4, 01:20 UTC | 8h 15m |
| 2026-07-03 | JBU2110 | BOS → JFK | Jul 3, 01:45 UTC | Jul 3, 15:10 UTC | 13h 25m |
| 2026-07-02 | JBU574 | - | Jul 2, 18:25 UTC | Jul 2, 23:00 UTC | 4h 35m |
| 2026-07-02 | JBU2173 | BOS → AUA | Jul 2, 12:20 UTC | Jul 2, 16:15 UTC | 3h 56m |
| 2026-07-02 | JBU2173 | BOS → AUA | Jul 2, 12:20 UTC | Jul 2, 16:30 UTC | 4h 10m |
| 2026-07-02 | JBU2924 | STI → BOS | Jul 2, 00:40 UTC | Jul 2, 04:15 UTC | 3h 36m |
| 2026-07-01 | JBU1601 | JFK → FLL | Jul 1, 11:05 UTC | Jul 1, 13:20 UTC | 2h 15m |
| 2026-07-01 | JBU1601 | JFK → FLL | Jul 1, 11:01 UTC | Jul 2, 04:20 UTC | 17h 20m |
| 2026-06-30 | JBU2023 | BOS → JFK | Jun 30, 17:30 UTC | Jul 1, 02:00 UTC | 8h 30m |
| 2026-06-30 | JBU724 | STI → BOS | Jun 30, 02:05 UTC | Jun 30, 12:50 UTC | 10h 45m |
| 2026-06-29 | JBU279 | JFK → JFK | Jun 29, 14:39 UTC | Jun 29, 22:55 UTC | 8h 15m |
| 2026-06-29 | JBU162 | - | Jun 29, 07:25 UTC | Jun 29, 12:09 UTC | 4h 45m |
| 2026-06-29 | JBU161 | - | Jun 29, 00:14 UTC | Jun 29, 05:54 UTC | 5h 40m |
| 2026-06-28 | JBU1604 | - | Jun 28, 21:04 UTC | Jun 28, 21:59 UTC | 55m |
| 2026-06-28 | JBU1604 | - | Jun 28, 18:34 UTC | Jun 28, 18:49 UTC | 15m |
| 2026-06-28 | JBU1347 | - | Jun 28, 16:45 UTC | Jun 28, 17:10 UTC | 25m |
| 2026-06-28 | JBU1348 | - | Jun 28, 00:35 UTC | Jun 28, 01:34 UTC | 1h 0m |
| 2026-06-27 | JBU1348 | - | Jun 27, 22:20 UTC | Jun 27, 22:29 UTC | 10m |
| 2026-06-27 | JBU1348 | SJU → DCA | Jun 27, 22:16 UTC | Jun 28, 18:49 UTC | 20h 34m |
| 2026-06-27 | JBU1603 | JFK → SJU | Jun 27, 17:20 UTC | Jun 27, 20:39 UTC | 3h 20m |
| 2026-06-27 | JBU904 | - | Jun 27, 12:04 UTC | Jun 27, 15:30 UTC | 3h 25m |
| 2026-06-27 | JBU2903 | - | Jun 27, 02:29 UTC | Jun 27, 02:50 UTC | 20m |
| 2026-06-26 | JBU2903 | - | Jun 26, 23:34 UTC | Jun 27, 00:00 UTC | 25m |
| 2026-06-26 | JBU1604 | - | Jun 26, 20:00 UTC | Jun 26, 20:50 UTC | 50m |
| 2026-06-26 | JBU1604 | - | Jun 26, 17:19 UTC | Jun 26, 17:29 UTC | 10m |
| 2026-06-26 | JBU1347 | - | Jun 26, 15:15 UTC | Jun 26, 15:34 UTC | 20m |
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 N950JT page for operator, model, and routing details .