sensors Mode-S transponder
A3845C
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N3258J · operated by JETBLUE AIRWAYS CORP
- Hex
- A3845C
- Octal
- 50702134
- Decimal
- 10,716,252
- Country
- US
- Tail
- N3258J
- Type
- BCS3
- Flights observed
- 165
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 2h ago
Current position
Country allocation
The ICAO 24-bit address A3845C 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 |
|---|---|---|---|
| JBU303 | JetBlue Airways | 6 | 2026-05-09 |
| JBU932 | JetBlue Airways | 3 | 2026-05-27 |
| JBU822 | JetBlue Airways | 3 | 2026-05-03 |
| JBU502 | JetBlue Airways | 3 | 2026-05-09 |
| JBU2901 | JetBlue Airways | 3 | 2026-05-10 |
| JBU2754 | JetBlue Airways | 3 | 2026-05-26 |
| JBU2468 | JetBlue Airways | 3 | 2026-05-25 |
| JBU1602 | JetBlue Airways | 3 | 2026-05-10 |
| JBU1500 | JetBlue Airways | 3 | 2026-05-28 |
| JBU1337 | JetBlue Airways | 3 | 2026-05-28 |
| JBU1302 | - | 3 | 2026-04-13 |
| JBU1069 | - | 3 | 2026-04-13 |
| JBU883 | JetBlue Airways | 2 | 2026-05-13 |
| JBU706 | JetBlue Airways | 2 | 2026-05-08 |
| JBU69 | JetBlue Airways | 2 | 2026-05-15 |
| JBU641 | JetBlue Airways | 2 | 2026-04-27 |
| JBU495 | JetBlue Airways | 2 | 2026-04-18 |
| JBU401 | JetBlue Airways | 2 | 2026-04-15 |
| JBU400 | JetBlue Airways | 2 | 2026-04-15 |
| JBU359 | JetBlue Airways | 2 | 2026-04-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | JBU516 | RSW → BOS | May 29, 21:50 UTC | May 29, 22:50 UTC | 1h 0m |
| 2026-05-29 | JBU1115 | BOS → DFW | May 29, 19:40 UTC | May 29, 20:50 UTC | 1h 10m |
| 2026-05-29 | JBU1254 | DCA → BOS | May 29, 17:30 UTC | May 29, 18:30 UTC | 1h 0m |
| 2026-05-29 | JBU1055 | BOS → DCA | May 29, 14:55 UTC | May 29, 16:05 UTC | 1h 10m |
| 2026-05-29 | JBU806 | LAX → SEA | May 29, 11:15 UTC | May 29, 13:25 UTC | 2h 10m |
| 2026-05-28 | JBU1500 | DAB → BOS | May 28, 18:48 UTC | May 29, 16:05 UTC | 21h 17m |
| 2026-05-28 | JBU1499 | BOS → DAB | May 28, 14:57 UTC | May 29, 13:00 UTC | 22h 3m |
| 2026-05-28 | JBU1337 | BOS → DTW | May 28, 00:50 UTC | May 28, 01:00 UTC | 10m |
| 2026-05-28 | JBU1337 | BOS → DTW | May 28, 00:48 UTC | May 28, 23:00 UTC | 22h 12m |
| 2026-05-27 | JBU932 | IAH → BOS | May 27, 19:45 UTC | May 27, 23:25 UTC | 3h 40m |
| 2026-05-27 | JBU932 | IAH → BOS | May 27, 19:40 UTC | May 28, 19:00 UTC | 23h 20m |
| 2026-05-27 | JBU2033 | BOS → IAH | May 27, 14:15 UTC | May 27, 18:20 UTC | 4h 5m |
| 2026-05-26 | JBU782 | MBJ → JFK | May 26, 20:56 UTC | May 27, 18:20 UTC | 21h 24m |
| 2026-05-26 | JBU845 | BOS → SYR | May 26, 02:30 UTC | May 26, 22:59 UTC | 20h 30m |
| 2026-05-26 | JBU2754 | DCA → BOS | May 26, 00:06 UTC | May 26, 22:59 UTC | 22h 54m |
| 2026-05-25 | JBU204 | BDA → BOS | May 25, 16:24 UTC | May 26, 14:35 UTC | 22h 11m |
| 2026-05-25 | JBU2468 | CHS → BOS | May 25, 02:29 UTC | May 26, 01:00 UTC | 22h 31m |
| 2026-05-24 | JBU2467 | BOS → CHS | May 24, 23:11 UTC | May 25, 23:00 UTC | 23h 49m |
| 2026-05-24 | JBU2896 | PUJ → BOS | May 24, 16:55 UTC | May 25, 14:35 UTC | 21h 41m |
| 2026-05-24 | JBU2895 | BOS → PUJ | May 24, 11:00 UTC | May 25, 09:00 UTC | 22h 1m |
| 2026-05-23 | JBU993 | BOS → DEN | May 23, 22:55 UTC | May 23, 23:00 UTC | 5m |
| 2026-05-23 | JBU1500 | DAB → BOS | May 23, 18:45 UTC | May 23, 21:00 UTC | 2h 15m |
| 2026-05-23 | JBU1500 | DAB → BOS | May 23, 18:43 UTC | May 24, 12:50 UTC | 18h 7m |
| 2026-05-23 | JBU1499 | BOS → DAB | May 23, 14:55 UTC | May 23, 17:30 UTC | 2h 35m |
| 2026-05-23 | JBU1236 | MSP → BOS | May 23, 11:55 UTC | May 23, 13:15 UTC | 1h 20m |
| 2026-05-23 | JBU1337 | BOS → DTW | May 23, 00:50 UTC | May 23, 02:30 UTC | 1h 40m |
| 2026-05-22 | JBU932 | IAH → BOS | May 22, 19:40 UTC | May 22, 23:00 UTC | 3h 20m |
| 2026-05-22 | JBU2033 | BOS → IAH | May 22, 14:30 UTC | May 22, 18:30 UTC | 4h 0m |
| 2026-05-22 | JBU716 | BUF → BOS | May 22, 11:50 UTC | May 22, 12:50 UTC | 1h 0m |
| 2026-05-21 | JBU249 | SAV → BOS | May 21, 09:59 UTC | May 22, 01:30 UTC | 15h 32m |
| 2026-05-20 | JBU1138 | AUS → BOS | May 20, 23:51 UTC | May 21, 23:00 UTC | 23h 10m |
| 2026-05-20 | JBU1039 | BOS → AUS | May 20, 17:24 UTC | May 21, 15:40 UTC | 22h 17m |
| 2026-05-20 | JBU1354 | DCA → BOS | May 20, 00:19 UTC | May 20, 23:00 UTC | 22h 42m |
| 2026-05-19 | JBU519 | JFK → ATL | May 19, 11:51 UTC | May 20, 07:05 UTC | 19h 15m |
| 2026-05-18 | JBU70 | PBI → JFK | May 18, 15:43 UTC | May 19, 15:00 UTC | 23h 17m |
| 2026-05-18 | JBU1 | JFK → FLL | May 18, 10:10 UTC | May 19, 01:25 UTC | 15h 15m |
| 2026-05-17 | JBU2275 | DCA → BOS | May 17, 21:35 UTC | May 17, 23:45 UTC | 2h 10m |
| 2026-05-17 | JBU2275 | DCA → BOS | May 17, 21:34 UTC | May 18, 21:00 UTC | 23h 26m |
| 2026-05-17 | JBU2276 | FLL → PHL | May 17, 17:55 UTC | May 17, 20:15 UTC | 2h 20m |
| 2026-05-16 | JBU2367 | BOS → CHS | May 16, 17:35 UTC | May 17, 14:15 UTC | 20h 41m |
| 2026-05-16 | JBU1070 | FLL → BOS | May 16, 13:11 UTC | May 17, 13:01 UTC | 23h 50m |
| 2026-05-16 | JBU1906 | TPA → FLL | May 16, 11:01 UTC | May 17, 01:20 UTC | 14h 20m |
| 2026-05-15 | JBU69 | BOS → FLL | May 15, 14:49 UTC | May 16, 11:41 UTC | 20h 52m |
| 2026-05-15 | JBU69 | BOS → FLL | May 15, 14:50 UTC | May 15, 15:00 UTC | 10m |
| 2026-05-15 | JBU1336 | DTW → BOS | May 15, 11:45 UTC | May 15, 13:20 UTC | 1h 35m |
| 2026-05-15 | JBU1336 | DTW → BOS | May 15, 11:45 UTC | May 16, 11:01 UTC | 23h 16m |
| 2026-05-14 | JBU2011 | JFK → VPS | May 14, 11:16 UTC | May 15, 03:30 UTC | 16h 15m |
| 2026-05-13 | JBU2784 | BZE → JFK | May 13, 18:58 UTC | May 14, 17:00 UTC | 22h 3m |
| 2026-05-13 | JBU883 | JFK → MCO | May 13, 15:00 UTC | May 13, 17:30 UTC | 2h 30m |
| 2026-05-13 | JBU883 | JFK → MCO | May 13, 14:59 UTC | May 14, 13:01 UTC | 22h 2m |
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 N3258J page for operator, model, and routing details .