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
- 144
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 15h ago
Current 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 |
|---|---|---|---|
| JBU774 | JetBlue Airways | 8 | 2026-05-08 |
| JBU473 | JetBlue Airways | 7 | 2026-05-08 |
| JBU661 | JetBlue Airways | 6 | 2026-05-18 |
| JBU1829 | JetBlue Airways | 4 | 2026-05-02 |
| JBU162 | JetBlue Airways | 4 | 2026-05-25 |
| JBU1347 | JetBlue Airways | 4 | 2026-05-28 |
| JBU932 | JetBlue Airways | 3 | 2026-04-17 |
| JBU769 | - | 3 | 2026-04-16 |
| JBU721 | JetBlue Airways | 3 | 2026-04-15 |
| JBU574 | JetBlue Airways | 3 | 2026-05-19 |
| JBU2895 | JetBlue Airways | 3 | 2026-05-20 |
| JBU221 | JetBlue Airways | 3 | 2026-04-15 |
| JBU22 | JetBlue Airways | 3 | 2026-04-16 |
| JBU2033 | JetBlue Airways | 3 | 2026-04-17 |
| JBU1152 | JetBlue Airways | 3 | 2026-05-10 |
| JBU970 | JetBlue Airways | 2 | 2026-05-05 |
| JBU851 | JetBlue Airways | 2 | 2026-04-28 |
| JBU73 | JetBlue Airways | 2 | 2026-04-25 |
| JBU722 | JetBlue Airways | 2 | 2026-04-24 |
| JBU622 | JetBlue Airways | 2 | 2026-04-15 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | JBU552 | MCO → BOS | May 29, 10:15 UTC | May 29, 21:35 UTC | 11h 21m |
| 2026-05-28 | JBU762 | CUN → JFK | May 28, 17:47 UTC | May 29, 16:15 UTC | 22h 29m |
| 2026-05-28 | JBU1347 | DCA → SJU | May 28, 15:50 UTC | May 28, 16:10 UTC | 20m |
| 2026-05-28 | JBU1347 | DCA → SJU | May 28, 12:45 UTC | May 28, 13:45 UTC | 1h 0m |
| 2026-05-28 | JBU1347 | DCA → SJU | May 28, 12:41 UTC | May 29, 12:15 UTC | 23h 34m |
| 2026-05-27 | JBU452 | MCO → BOS | May 27, 11:55 UTC | May 28, 00:50 UTC | 12h 55m |
| 2026-05-26 | JBU1008 | JFK → BOS | May 26, 16:17 UTC | May 27, 14:15 UTC | 21h 58m |
| 2026-05-26 | JBU1008 | JFK → BOS | May 26, 11:15 UTC | May 26, 19:55 UTC | 8h 40m |
| 2026-05-25 | JBU279 | LAS → LGB | May 25, 14:45 UTC | May 26, 11:50 UTC | 21h 5m |
| 2026-05-25 | JBU162 | SMF → JFK | May 25, 07:06 UTC | May 25, 22:55 UTC | 15h 49m |
| 2026-05-25 | JBU162 | SMF → JFK | May 25, 07:10 UTC | May 25, 12:05 UTC | 4h 55m |
| 2026-05-25 | JBU161 | JFK → SMF | May 25, 01:55 UTC | May 25, 05:10 UTC | 3h 15m |
| 2026-05-24 | JBU161 | JFK → SMF | May 24, 23:40 UTC | May 24, 23:46 UTC | 6m |
| 2026-05-24 | JBU169 | BDL → FLL | May 24, 13:00 UTC | May 24, 21:35 UTC | 8h 35m |
| 2026-05-24 | JBU1759 | JFK → KIN | May 24, 00:15 UTC | May 24, 02:35 UTC | 2h 20m |
| 2026-05-24 | JBU1759 | JFK → KIN | May 24, 00:12 UTC | May 24, 21:35 UTC | 21h 23m |
| 2026-05-23 | JBU1901 | BUF → JFK | May 23, 13:55 UTC | May 23, 14:55 UTC | 1h 0m |
| 2026-05-23 | JBU1602 | JFK → BUF | May 23, 12:00 UTC | May 23, 12:55 UTC | 55m |
| 2026-05-22 | JBU989 | JFK → PUJ | May 22, 11:35 UTC | May 22, 19:50 UTC | 8h 15m |
| 2026-05-21 | JBU2917 | BOS → JFK | May 21, 09:34 UTC | May 21, 23:10 UTC | 13h 37m |
| 2026-05-20 | JBU2896 | PUJ → BOS | May 20, 17:06 UTC | May 21, 15:40 UTC | 22h 35m |
| 2026-05-20 | JBU2895 | BOS → PUJ | May 20, 11:44 UTC | May 21, 10:15 UTC | 22h 32m |
| 2026-05-20 | JBU2895 | BOS → PUJ | May 20, 11:45 UTC | May 20, 13:40 UTC | 1h 55m |
| 2026-05-19 | JBU574 | GND → BOS | May 19, 23:45 UTC | May 20, 00:25 UTC | 40m |
| 2026-05-19 | JBU574 | GND → BOS | May 19, 18:40 UTC | May 19, 22:35 UTC | 3h 55m |
| 2026-05-19 | JBU574 | GND → BOS | May 19, 17:50 UTC | May 19, 18:00 UTC | 10m |
| 2026-05-19 | JBU2173 | BOS → AUA | May 19, 16:00 UTC | May 19, 16:20 UTC | 20m |
| 2026-05-18 | JBU1296 | BUF → BOS | May 18, 20:30 UTC | May 19, 18:00 UTC | 21h 30m |
| 2026-05-18 | JBU661 | LGA → PBI | May 18, 06:20 UTC | May 18, 06:40 UTC | 20m |
| 2026-05-18 | JBU661 | LGA → PBI | May 18, 02:50 UTC | May 19, 01:00 UTC | 22h 10m |
| 2026-05-18 | JBU661 | LGA → PBI | May 18, 02:50 UTC | May 18, 04:05 UTC | 1h 15m |
| 2026-05-17 | JBU1296 | BUF → BOS | May 17, 14:45 UTC | May 17, 23:50 UTC | 9h 5m |
| 2026-05-17 | JBU42 | PBI → LGA | May 17, 10:50 UTC | May 17, 13:01 UTC | 2h 10m |
| 2026-05-17 | JBU42 | PBI → LGA | May 17, 09:20 UTC | May 17, 09:35 UTC | 15m |
| 2026-05-16 | JBU1347 | DCA → SJU | May 16, 12:07 UTC | May 17, 09:35 UTC | 21h 29m |
| 2026-05-15 | JBU1348 | SJU → DCA | May 15, 22:35 UTC | May 16, 22:15 UTC | 23h 40m |
| 2026-05-15 | JBU552 | MCO → BOS | May 15, 11:47 UTC | May 16, 03:00 UTC | 15h 13m |
| 2026-05-15 | JBU1827 | EWR → MCO | May 15, 01:52 UTC | May 15, 22:50 UTC | 20h 58m |
| 2026-05-14 | JBU1483 | JFK → MCO | May 14, 11:20 UTC | May 14, 13:40 UTC | 2h 20m |
| 2026-05-14 | JBU1483 | JFK → MCO | May 14, 11:16 UTC | May 15, 04:15 UTC | 17h 0m |
| 2026-05-14 | JBU1329 | GUA → JFK | May 14, 04:55 UTC | May 14, 06:55 UTC | 2h 0m |
| 2026-05-11 | JBU2896 | PUJ → BOS | May 11, 17:00 UTC | May 12, 06:50 UTC | 13h 51m |
| 2026-05-11 | JBU2895 | BOS → PUJ | May 11, 11:45 UTC | May 11, 14:55 UTC | 3h 10m |
| 2026-05-10 | JBU1152 | MCO → BOS | May 10, 22:09 UTC | May 11, 00:30 UTC | 2h 20m |
| 2026-05-09 | JBU392 | TPA → BOS | May 9, 23:20 UTC | May 10, 22:15 UTC | 22h 55m |
| 2026-05-09 | JBU392 | TPA → BOS | May 9, 23:20 UTC | May 10, 01:55 UTC | 2h 35m |
| 2026-05-09 | JBU391 | BOS → TPA | May 9, 18:55 UTC | May 9, 21:50 UTC | 2h 55m |
| 2026-05-09 | JBU1830 | SDQ → BOS | May 9, 02:35 UTC | May 9, 12:55 UTC | 10h 20m |
| 2026-05-08 | JBU774 | LAS → JFK | May 8, 23:00 UTC | May 9, 00:05 UTC | 1h 5m |
| 2026-05-08 | JBU774 | LAS → JFK | May 8, 19:35 UTC | May 8, 19:50 UTC | 15m |
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 .