sensors Mode-S transponder
A39243
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N3291J · AIRBUS A220-300 · operated by JETBLUE AIRWAYS
- Hex
- A39243
- Octal
- 50711103
- Decimal
- 10,719,811
- Country
- US
- Tail
- N3291J
- Type
- BCS3
- Flights observed
- 324
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 26, 22:45 UTC
Current position
Country allocation
The ICAO 24-bit address A39243 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 |
|---|---|---|---|
| JBU2786 | JetBlue Airways | 7 | 2026-07-26 |
| JBU2601 | - | 6 | 2026-07-15 |
| JBU506 | - | 5 | 2026-07-18 |
| JBU1206 | - | 5 | 2026-07-06 |
| JBU405 | - | 4 | 2026-07-10 |
| JBU2602 | JetBlue Airways | 4 | 2026-06-07 |
| JBU249 | - | 4 | 2026-07-05 |
| JBU206 | JetBlue Airways | 4 | 2026-05-16 |
| JBU1715 | - | 4 | 2026-07-08 |
| JBU897 | JetBlue Airways | 3 | 2026-07-22 |
| JBU854 | - | 3 | 2026-07-08 |
| JBU80 | JetBlue Airways | 3 | 2026-07-25 |
| JBU68 | JetBlue Airways | 3 | 2026-05-22 |
| JBU369 | JetBlue Airways | 3 | 2026-04-14 |
| JBU366 | - | 3 | 2026-04-14 |
| JBU2285 | JetBlue Airways | 3 | 2026-07-26 |
| JBU2186 | - | 3 | 2026-07-17 |
| JBU2152 | - | 3 | 2026-07-15 |
| JBU1923 | JetBlue Airways | 3 | 2026-04-29 |
| JBU1499 | JetBlue Airways | 3 | 2026-05-20 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | JBU226 | TPA → JFK | Jul 26, 21:55 UTC | Jul 26, 22:45 UTC | 50m |
| 2026-07-26 | JBU125 | JFK → TPA | Jul 26, 18:15 UTC | Jul 26, 20:35 UTC | 2h 20m |
| 2026-07-26 | JBU2786 | RDU → JFK | Jul 26, 15:30 UTC | Jul 26, 16:35 UTC | 1h 5m |
| 2026-07-26 | JBU2285 | JFK → RDU | Jul 26, 13:10 UTC | Jul 26, 14:20 UTC | 1h 10m |
| 2026-07-25 | JBU80 | RNO → JFK | Jul 25, 15:25 UTC | Jul 25, 19:55 UTC | 4h 30m |
| 2026-07-25 | JBU80 | RNO → JFK | Jul 25, 15:18 UTC | Jul 26, 14:20 UTC | 23h 3m |
| 2026-07-24 | JBU2901 | JFK → FLL | Jul 24, 19:55 UTC | Jul 24, 20:50 UTC | 55m |
| 2026-07-24 | JBU2901 | JFK → FLL | Jul 24, 19:50 UTC | Jul 25, 18:45 UTC | 22h 55m |
| 2026-07-24 | JBU2902 | JFK → BUF | Jul 24, 17:40 UTC | Jul 24, 18:35 UTC | 55m |
| 2026-07-24 | JBU626 | TPA → JFK | Jul 24, 13:25 UTC | Jul 24, 15:45 UTC | 2h 20m |
| 2026-07-24 | JBU2725 | JFK → TPA | Jul 24, 02:55 UTC | Jul 24, 05:10 UTC | 2h 15m |
| 2026-07-23 | JBU1515 | JFK → SFO | Jul 23, 09:59 UTC | Jul 24, 05:15 UTC | 19h 16m |
| 2026-07-23 | JBU1516 | JFK → SYR | Jul 23, 04:29 UTC | Jul 24, 02:45 UTC | 22h 16m |
| 2026-07-23 | JBU520 | ATL → JFK | Jul 23, 00:25 UTC | Jul 23, 00:45 UTC | 20m |
| 2026-07-22 | JBU897 | BOS → LIR | Jul 22, 20:00 UTC | Jul 22, 22:25 UTC | 2h 25m |
| 2026-07-22 | JBU897 | BOS → LIR | Jul 22, 19:56 UTC | Jul 23, 18:45 UTC | 22h 49m |
| 2026-07-22 | JBU203 | BOS → BDA | Jul 22, 13:35 UTC | Jul 22, 18:15 UTC | 4h 40m |
| 2026-07-22 | JBU1290 | ILM → BOS | Jul 22, 03:15 UTC | Jul 22, 04:45 UTC | 1h 30m |
| 2026-07-21 | JBU1293 | BOS → ILM | Jul 21, 23:00 UTC | Jul 22, 01:10 UTC | 2h 10m |
| 2026-07-21 | JBU1151 | BOS → MCO | Jul 21, 16:40 UTC | Jul 21, 17:05 UTC | 25m |
| 2026-07-21 | JBU2352 | MCO → BOS | Jul 21, 14:00 UTC | Jul 21, 14:20 UTC | 20m |
| 2026-07-21 | JBU96 | SXM → EWR | Jul 21, 06:45 UTC | Jul 21, 11:20 UTC | 4h 35m |
| 2026-07-20 | JBU95 | BOS → PUJ | Jul 20, 23:35 UTC | Jul 21, 05:40 UTC | 6h 5m |
| 2026-07-20 | JBU2265 | BOS → RSW | Jul 20, 09:35 UTC | Jul 20, 10:10 UTC | 35m |
| 2026-07-20 | JBU2265 | BOS → RSW | Jul 20, 09:32 UTC | Jul 21, 08:45 UTC | 23h 13m |
| 2026-07-19 | JBU1281 | BOS → RIC | Jul 19, 11:20 UTC | Jul 20, 10:10 UTC | 22h 51m |
| 2026-07-18 | JBU910 | NAS → BOS | Jul 18, 15:55 UTC | Jul 19, 12:40 UTC | 20h 46m |
| 2026-07-18 | JBU506 | - | Jul 18, 01:45 UTC | Jul 18, 03:55 UTC | 2h 11m |
| 2026-07-18 | JBU506 | BNA → BOS | Jul 18, 01:44 UTC | Jul 19, 00:45 UTC | 23h 2m |
| 2026-07-17 | JBU507 | BOS → BNA | Jul 17, 22:29 UTC | Jul 18, 00:45 UTC | 2h 15m |
| 2026-07-17 | JBU2186 | PIT → BOS | Jul 17, 04:06 UTC | Jul 18, 02:45 UTC | 22h 39m |
| 2026-07-16 | JBU22 | - | Jul 16, 21:29 UTC | Jul 17, 19:40 UTC | 22h 11m |
| 2026-07-16 | JBU53 | - | Jul 16, 18:05 UTC | Jul 16, 20:15 UTC | 2h 10m |
| 2026-07-16 | JBU53 | - | Jul 16, 18:02 UTC | Jul 17, 14:35 UTC | 20h 33m |
| 2026-07-16 | JBU626 | TPA → JFK | Jul 16, 14:10 UTC | Jul 16, 16:25 UTC | 2h 15m |
| 2026-07-15 | JBU2152 | - | Jul 15, 19:20 UTC | Jul 15, 20:20 UTC | 1h 0m |
| 2026-07-15 | JBU2152 | - | Jul 15, 17:30 UTC | Jul 15, 17:45 UTC | 15m |
| 2026-07-15 | JBU2152 | SJU → TPA | Jul 15, 17:29 UTC | Jul 16, 16:30 UTC | 23h 1m |
| 2026-07-15 | JBU2601 | - | Jul 15, 15:45 UTC | Jul 15, 16:10 UTC | 25m |
| 2026-07-15 | JBU2601 | HPN → SJU | Jul 15, 12:45 UTC | Jul 15, 16:10 UTC | 3h 25m |
| 2026-07-15 | JBU2601 | - | Jul 15, 12:50 UTC | Jul 15, 13:30 UTC | 40m |
| 2026-07-14 | JBU1047 | PHL → HPN | Jul 14, 16:45 UTC | Jul 15, 02:25 UTC | 9h 39m |
| 2026-07-14 | JBU1048 | - | Jul 14, 14:15 UTC | Jul 14, 15:25 UTC | 1h 10m |
| 2026-07-13 | JBU1238 | - | Jul 13, 15:20 UTC | Jul 13, 18:55 UTC | 3h 35m |
| 2026-07-13 | JBU1238 | AUS → BOS | Jul 13, 15:18 UTC | Jul 14, 14:45 UTC | 23h 28m |
| 2026-07-13 | JBU1439 | - | Jul 13, 10:05 UTC | Jul 13, 13:35 UTC | 3h 30m |
| 2026-07-12 | JBU494 | DEN → BOS | Jul 12, 16:15 UTC | Jul 13, 14:45 UTC | 22h 31m |
| 2026-07-12 | JBU250 | SAV → BOS | Jul 12, 02:42 UTC | Jul 13, 00:15 UTC | 21h 34m |
| 2026-07-11 | JBU654 | PLS → BOS | Jul 11, 16:54 UTC | Jul 12, 16:45 UTC | 23h 52m |
| 2026-07-11 | JBU453 | BOS → PLS | Jul 11, 11:41 UTC | Jul 12, 10:45 UTC | 23h 5m |
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 N3291J page for operator, model, and routing details .