sensors Mode-S transponder
A37FD3
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N3242J · operated by JETBLUE AIRWAYS CORP
- Hex
- A37FD3
- Octal
- 50677723
- Decimal
- 10,715,091
- Country
- US
- Tail
- N3242J
- Type
- BCS3
- Flights observed
- 164
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 8h ago
Last known position
Country allocation
The ICAO 24-bit address A37FD3 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 |
|---|---|---|---|
| JBU400 | JetBlue Airways | 4 | 2026-05-04 |
| JBU2473 | JetBlue Airways | 4 | 2026-05-09 |
| JBU204 | - | 4 | 2026-04-16 |
| JBU870 | JetBlue Airways | 3 | 2026-04-13 |
| JBU72 | JetBlue Airways | 3 | 2026-04-17 |
| JBU71 | JetBlue Airways | 3 | 2026-04-17 |
| JBU519 | - | 3 | 2026-04-17 |
| JBU401 | JetBlue Airways | 3 | 2026-05-04 |
| JBU267 | JetBlue Airways | 3 | 2026-04-20 |
| JBU203 | - | 3 | 2026-04-16 |
| JBU95 | JetBlue Airways | 2 | 2026-05-25 |
| JBU918 | JetBlue Airways | 2 | 2026-04-18 |
| JBU860 | JetBlue Airways | 2 | 2026-04-25 |
| JBU859 | JetBlue Airways | 2 | 2026-04-25 |
| JBU856 | JetBlue Airways | 2 | 2026-05-23 |
| JBU810 | JetBlue Airways | 2 | 2026-05-17 |
| JBU717 | JetBlue Airways | 2 | 2026-05-16 |
| JBU68 | JetBlue Airways | 2 | 2026-04-15 |
| JBU641 | JetBlue Airways | 2 | 2026-05-17 |
| JBU591 | JetBlue Airways | 2 | 2026-04-21 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | JBU1955 | BOS → DCA | May 29, 22:25 UTC | May 30, 02:06 UTC | 3h 42m |
| 2026-05-29 | JBU618 | JFK → BOS | May 29, 20:06 UTC | May 30, 02:06 UTC | 6h 1m |
| 2026-05-29 | JBU372 | FLL → LGA | May 29, 06:05 UTC | May 29, 10:05 UTC | 4h 0m |
| 2026-05-29 | JBU372 | FLL → LGA | May 29, 06:04 UTC | May 30, 02:06 UTC | 20h 3m |
| 2026-05-28 | JBU2769 | BOS → FLL | May 28, 10:39 UTC | May 29, 08:45 UTC | 22h 6m |
| 2026-05-27 | JBU1785 | BOS → PIT | May 27, 17:28 UTC | May 28, 16:05 UTC | 22h 37m |
| 2026-05-27 | JBU150 | SAV → BOS | May 27, 13:48 UTC | May 28, 11:50 UTC | 22h 2m |
| 2026-05-27 | JBU249 | SAV → BOS | May 27, 09:59 UTC | May 28, 03:30 UTC | 17h 31m |
| 2026-05-26 | JBU1500 | DAB → BOS | May 26, 20:20 UTC | May 26, 22:54 UTC | 2h 35m |
| 2026-05-26 | JBU1500 | DAB → BOS | May 26, 20:16 UTC | May 27, 18:45 UTC | 22h 30m |
| 2026-05-26 | JBU1499 | BOS → DAB | May 26, 14:50 UTC | May 26, 17:20 UTC | 2h 30m |
| 2026-05-25 | JBU396 | PUJ → BOS | May 25, 21:54 UTC | May 26, 00:44 UTC | 2h 50m |
| 2026-05-25 | JBU396 | PUJ → BOS | May 25, 21:53 UTC | May 26, 20:45 UTC | 22h 52m |
| 2026-05-25 | JBU95 | BOS → PUJ | May 25, 14:23 UTC | May 26, 12:45 UTC | 22h 22m |
| 2026-05-25 | JBU95 | BOS → PUJ | May 25, 14:25 UTC | May 25, 20:09 UTC | 5h 44m |
| 2026-05-25 | JBU540 | JAX → LGA | May 25, 11:35 UTC | May 25, 12:50 UTC | 1h 15m |
| 2026-05-24 | JBU382 | FLL → LGA | May 24, 10:14 UTC | May 25, 02:00 UTC | 15h 47m |
| 2026-05-23 | JBU1109 | BOS → NAS | May 23, 14:56 UTC | May 24, 14:05 UTC | 23h 9m |
| 2026-05-23 | JBU856 | PLS → JFK | May 23, 11:25 UTC | May 23, 12:45 UTC | 1h 20m |
| 2026-05-23 | JBU856 | PLS → JFK | May 23, 11:23 UTC | May 24, 10:45 UTC | 23h 22m |
| 2026-05-23 | JBU895 | BOS → PUJ | May 23, 01:20 UTC | May 23, 03:20 UTC | 1h 59m |
| 2026-05-22 | JBU678 | JAX → JFK | May 22, 21:50 UTC | May 22, 23:40 UTC | 1h 50m |
| 2026-05-22 | JBU677 | JFK → JAX | May 22, 18:15 UTC | May 22, 20:15 UTC | 2h 0m |
| 2026-05-22 | JBU142 | GCM → BOS | May 22, 14:55 UTC | May 22, 16:30 UTC | 1h 35m |
| 2026-05-22 | JBU741 | BOS → SRQ | May 22, 11:50 UTC | May 22, 13:35 UTC | 1h 45m |
| 2026-05-21 | JBU349 | BOS → SAV | May 21, 18:35 UTC | May 21, 20:45 UTC | 2h 10m |
| 2026-05-21 | JBU349 | BOS → SAV | May 21, 18:31 UTC | May 22, 16:30 UTC | 22h 0m |
| 2026-05-21 | JBU1814 | ORF → BOS | May 21, 15:10 UTC | May 21, 16:10 UTC | 1h 0m |
| 2026-05-21 | JBU1813 | BOS → ORF | May 21, 12:25 UTC | May 21, 13:35 UTC | 1h 10m |
| 2026-05-21 | JBU1302 | PHX → BOS | May 21, 05:50 UTC | May 21, 10:05 UTC | 4h 15m |
| 2026-05-20 | JBU1303 | BOS → PHX | May 20, 23:00 UTC | May 21, 04:30 UTC | 5h 30m |
| 2026-05-20 | JBU2554 | DCA → BOS | May 20, 19:50 UTC | May 20, 20:55 UTC | 1h 5m |
| 2026-05-20 | JBU2024 | MCO → DCA | May 20, 12:55 UTC | May 20, 14:45 UTC | 1h 50m |
| 2026-05-19 | JBU2523 | DCA → MCO | May 19, 22:30 UTC | May 20, 00:15 UTC | 1h 45m |
| 2026-05-19 | JBU2055 | BOS → DCA | May 19, 20:10 UTC | May 19, 21:25 UTC | 1h 15m |
| 2026-05-19 | JBU418 | JFK → BOS | May 19, 18:00 UTC | May 19, 18:45 UTC | 45m |
| 2026-05-19 | JBU1306 | IAD → JFK | May 19, 13:50 UTC | May 19, 15:30 UTC | 1h 40m |
| 2026-05-18 | JBU2283 | BOS → RDU | May 18, 16:37 UTC | May 19, 14:45 UTC | 22h 8m |
| 2026-05-17 | JBU1979 | DCA → FLL | May 17, 23:10 UTC | May 18, 22:20 UTC | 23h 10m |
| 2026-05-17 | JBU641 | BOS → CLE | May 17, 13:50 UTC | May 17, 15:25 UTC | 1h 35m |
| 2026-05-17 | JBU641 | BOS → CLE | May 17, 13:49 UTC | May 18, 12:45 UTC | 22h 57m |
| 2026-05-17 | JBU810 | NAS → BOS | May 17, 10:10 UTC | May 17, 12:15 UTC | 2h 5m |
| 2026-05-16 | JBU896 | ATL → BOS | May 16, 15:05 UTC | May 17, 14:45 UTC | 23h 41m |
| 2026-05-16 | JBU117 | BOS → ATL | May 16, 09:59 UTC | May 16, 21:05 UTC | 11h 7m |
| 2026-05-16 | JBU717 | BOS → JFK | May 16, 03:50 UTC | May 16, 21:05 UTC | 17h 16m |
| 2026-05-15 | JBU1315 | BOS → BUF | May 15, 14:25 UTC | May 16, 12:45 UTC | 22h 21m |
| 2026-05-15 | JBU1315 | BOS → BUF | May 15, 14:25 UTC | May 15, 17:15 UTC | 2h 49m |
| 2026-05-15 | JBU2186 | PIT → BOS | May 15, 11:25 UTC | May 15, 12:50 UTC | 1h 25m |
| 2026-05-14 | JBU2367 | BOS → CHS | May 14, 17:15 UTC | May 15, 16:45 UTC | 23h 30m |
| 2026-05-14 | JBU1905 | FLL → TPA | May 14, 01:28 UTC | May 15, 00:30 UTC | 23h 3m |
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 N3242J page for operator, model, and routing details .