sensors Mode-S transponder
AD4BCB
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N956JT · AIRBUS A-321 · operated by JETBLUE AIRWAYS CORP
- Hex
- AD4BCB
- Octal
- 53245713
- Decimal
- 11,357,131
- Country
- US
- Tail
- N956JT
- Type
- A321
- Flights observed
- 266
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 26, 20:40 UTC
Last known position
Country allocation
The ICAO 24-bit address AD4BCB 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 |
|---|---|---|---|
| JBU2173 | JetBlue Airways | 9 | 2026-07-25 |
| JBU574 | JetBlue Airways | 8 | 2026-07-25 |
| JBU651 | JetBlue Airways | 6 | 2026-05-14 |
| JBU2829 | JetBlue Airways | 5 | 2026-07-26 |
| JBU1457 | - | 5 | 2026-07-09 |
| JBU1348 | JetBlue Airways | 5 | 2026-05-28 |
| JBU1347 | - | 5 | 2026-07-12 |
| JBU1073 | JetBlue Airways | 5 | 2026-06-06 |
| JBU91 | JetBlue Airways | 4 | 2026-04-22 |
| JBU592 | JetBlue Airways | 4 | 2026-04-22 |
| JBU22 | JetBlue Airways | 4 | 2026-06-08 |
| JBU1830 | - | 4 | 2026-07-19 |
| JBU1829 | JetBlue Airways | 4 | 2026-07-24 |
| JBU1652 | JetBlue Airways | 4 | 2026-04-24 |
| JBU1604 | - | 4 | 2026-07-12 |
| JBU1603 | - | 4 | 2026-07-11 |
| JBU862 | JetBlue Airways | 3 | 2026-04-25 |
| JBU774 | JetBlue Airways | 3 | 2026-06-06 |
| JBU772 | JetBlue Airways | 3 | 2026-06-02 |
| JBU771 | JetBlue Airways | 3 | 2026-06-04 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | JBU2829 | JFK → RSW | Jul 26, 02:43 UTC | Jul 26, 20:40 UTC | 17h 58m |
| 2026-07-25 | JBU574 | GND → BOS | Jul 25, 21:55 UTC | Jul 26, 00:15 UTC | 2h 20m |
| 2026-07-25 | JBU574 | GND → BOS | Jul 25, 19:35 UTC | Jul 25, 19:55 UTC | 20m |
| 2026-07-25 | JBU574 | GND → BOS | Jul 25, 19:33 UTC | Jul 26, 18:15 UTC | 22h 43m |
| 2026-07-25 | JBU2173 | BOS → AUA | Jul 25, 17:50 UTC | Jul 25, 18:10 UTC | 20m |
| 2026-07-25 | JBU2173 | BOS → AUA | Jul 25, 13:30 UTC | Jul 25, 17:20 UTC | 3h 50m |
| 2026-07-24 | JBU1829 | BOS → SDQ | Jul 24, 18:42 UTC | Jul 25, 15:55 UTC | 21h 13m |
| 2026-07-24 | JBU1829 | BOS → SDQ | Jul 24, 18:45 UTC | Jul 24, 19:45 UTC | 1h 0m |
| 2026-07-24 | JBU1160 | PHL → BOS | Jul 24, 15:40 UTC | Jul 24, 16:25 UTC | 45m |
| 2026-07-24 | JBU1159 | BOS → PHL | Jul 24, 13:00 UTC | Jul 24, 14:05 UTC | 1h 5m |
| 2026-07-23 | JBU2110 | SDQ → JFK | Jul 23, 16:11 UTC | Jul 24, 14:05 UTC | 21h 54m |
| 2026-07-22 | JBU9 | JFK → FLL | Jul 22, 21:55 UTC | Jul 23, 19:50 UTC | 21h 55m |
| 2026-07-22 | JBU1436 | LGB → SFO | Jul 22, 11:10 UTC | Jul 22, 19:40 UTC | 8h 30m |
| 2026-07-21 | JBU1536 | BOS → JFK | Jul 21, 03:35 UTC | Jul 21, 17:55 UTC | 14h 20m |
| 2026-07-20 | JBU398 | SEA → BOS | Jul 20, 21:00 UTC | Jul 21, 01:15 UTC | 4h 15m |
| 2026-07-20 | JBU397 | BOS → SEA | Jul 20, 12:35 UTC | Jul 20, 18:30 UTC | 5h 55m |
| 2026-07-19 | JBU1830 | - | Jul 19, 11:35 UTC | Jul 19, 12:55 UTC | 1h 20m |
| 2026-07-18 | JBU1830 | - | Jul 18, 16:50 UTC | Jul 19, 12:55 UTC | 20h 5m |
| 2026-07-18 | JBU1829 | BOS → SDQ | Jul 18, 16:00 UTC | Jul 19, 13:00 UTC | 21h 1m |
| 2026-07-18 | JBU1829 | - | Jul 18, 16:00 UTC | Jul 18, 17:00 UTC | 1h 0m |
| 2026-07-17 | JBU1830 | JFK → BOS | Jul 17, 21:15 UTC | Jul 18, 13:00 UTC | 15h 46m |
| 2026-07-17 | JBU602 | - | Jul 17, 16:29 UTC | Jul 17, 18:50 UTC | 2h 20m |
| 2026-07-17 | JBU1601 | JFK → FLL | Jul 17, 11:15 UTC | Jul 17, 13:29 UTC | 2h 15m |
| 2026-07-16 | JBU860 | - | Jul 16, 22:10 UTC | Jul 17, 06:05 UTC | 7h 55m |
| 2026-07-16 | JBU859 | BOS → FLL | Jul 16, 21:40 UTC | Jul 16, 22:05 UTC | 25m |
| 2026-07-16 | JBU1436 | JFK → JFK | Jul 16, 09:15 UTC | Jul 16, 17:35 UTC | 8h 20m |
| 2026-07-15 | JBU1668 | JFK → JFK | Jul 15, 16:10 UTC | Jul 16, 00:20 UTC | 8h 10m |
| 2026-07-14 | JBU610 | JFK → JFK | Jul 14, 22:00 UTC | Jul 15, 13:55 UTC | 15h 54m |
| 2026-07-13 | JBU1668 | JFK → JFK | Jul 13, 15:55 UTC | Jul 14, 00:20 UTC | 8h 25m |
| 2026-07-13 | JBU162 | - | Jul 13, 07:45 UTC | Jul 13, 12:55 UTC | 5h 10m |
| 2026-07-12 | JBU1604 | SJU → JFK | Jul 12, 18:23 UTC | Jul 13, 16:40 UTC | 22h 18m |
| 2026-07-12 | JBU1347 | DCA → SJU | Jul 12, 12:39 UTC | Jul 13, 10:45 UTC | 22h 7m |
| 2026-07-11 | JBU1603 | JFK → SJU | Jul 11, 21:20 UTC | Jul 12, 18:45 UTC | 21h 26m |
| 2026-07-11 | JBU1603 | JFK → SJU | Jul 11, 21:20 UTC | Jul 12, 18:45 UTC | 21h 26m |
| 2026-07-11 | JBU1603 | - | Jul 11, 21:20 UTC | Jul 11, 22:40 UTC | 1h 20m |
| 2026-07-11 | JBU454 | ONT → JFK | Jul 11, 07:30 UTC | Jul 11, 12:05 UTC | 4h 35m |
| 2026-07-11 | JBU355 | JFK → ONT | Jul 11, 00:35 UTC | Jul 11, 05:55 UTC | 5h 20m |
| 2026-07-10 | JBU152 | CUN → JFK | Jul 10, 19:00 UTC | Jul 10, 22:15 UTC | 3h 16m |
| 2026-07-09 | JBU158 | AUA → JFK | Jul 9, 23:02 UTC | Jul 10, 22:20 UTC | 23h 19m |
| 2026-07-09 | JBU1457 | JFK → AUA | Jul 9, 17:11 UTC | Jul 10, 16:30 UTC | 23h 20m |
| 2026-07-09 | JBU1457 | - | Jul 9, 17:15 UTC | Jul 9, 20:35 UTC | 3h 20m |
| 2026-07-08 | JBU637 | - | Jul 8, 23:55 UTC | Jul 9, 12:55 UTC | 13h 0m |
| 2026-07-08 | JBU169 | JFK → PUJ | Jul 8, 11:56 UTC | Jul 9, 01:50 UTC | 13h 55m |
| 2026-07-07 | JBU1604 | - | Jul 7, 20:05 UTC | Jul 7, 20:45 UTC | 40m |
| 2026-07-07 | JBU1604 | - | Jul 7, 17:25 UTC | Jul 7, 17:40 UTC | 15m |
| 2026-07-07 | JBU1604 | SJU → JFK | Jul 7, 17:21 UTC | Jul 8, 13:15 UTC | 19h 54m |
| 2026-07-05 | JBU1603 | JFK → SJU | Jul 5, 13:25 UTC | Jul 5, 16:45 UTC | 3h 20m |
| 2026-07-04 | JBU536 | STI → JFK | Jul 4, 09:39 UTC | Jul 5, 02:20 UTC | 16h 41m |
| 2026-07-04 | JBU937 | JFK → STI | Jul 4, 02:31 UTC | Jul 4, 18:10 UTC | 15h 40m |
| 2026-07-04 | JBU937 | - | Jul 4, 02:35 UTC | Jul 4, 03:15 UTC | 40m |
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 N956JT page for operator, model, and routing details .