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
- 319
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 18m ago
Last known 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 |
| JBU516 | - | 5 | 2026-07-13 |
| JBU1500 | - | 5 | 2026-07-11 |
| JBU69 | JetBlue Airways | 4 | 2026-06-07 |
| JBU247 | - | 4 | 2026-07-12 |
| JBU163 | - | 4 | 2026-07-03 |
| 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 |
| JBU254 | - | 3 | 2026-07-01 |
| JBU249 | - | 3 | 2026-06-30 |
| JBU2468 | JetBlue Airways | 3 | 2026-05-25 |
| JBU2255 | - | 3 | 2026-07-09 |
| JBU2184 | JetBlue Airways | 3 | 2026-06-28 |
| JBU2134 | - | 3 | 2026-06-25 |
| JBU204 | JetBlue Airways | 3 | 2026-05-31 |
| JBU1715 | - | 3 | 2026-07-02 |
| JBU164 | - | 3 | 2026-07-03 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | JBU507 | BOS → BNA | Jul 13, 21:43 UTC | Jul 14, 07:00 UTC | 9h 18m |
| 2026-07-13 | JBU516 | BUF → BOS | Jul 13, 03:46 UTC | Jul 14, 03:00 UTC | 23h 15m |
| 2026-07-12 | JBU2355 | BOS → DCA | Jul 12, 13:15 UTC | Jul 13, 13:00 UTC | 23h 46m |
| 2026-07-12 | JBU247 | BOS → SLC | Jul 12, 00:17 UTC | Jul 12, 23:00 UTC | 22h 44m |
| 2026-07-11 | JBU1500 | DAB → BOS | Jul 11, 19:36 UTC | Jul 12, 18:55 UTC | 23h 20m |
| 2026-07-11 | JBU1286 | - | Jul 11, 13:50 UTC | Jul 11, 14:55 UTC | 1h 5m |
| 2026-07-11 | JBU1286 | PIT → BOS | Jul 11, 13:46 UTC | Jul 12, 13:01 UTC | 23h 15m |
| 2026-07-11 | JBU1285 | BOS → PIT | Jul 11, 10:35 UTC | Jul 11, 11:50 UTC | 1h 15m |
| 2026-07-10 | JBU1232 | - | Jul 10, 23:45 UTC | Jul 11, 02:10 UTC | 2h 25m |
| 2026-07-10 | JBU1231 | - | Jul 10, 16:35 UTC | Jul 10, 19:15 UTC | 2h 40m |
| 2026-07-10 | JBU1282 | - | Jul 10, 13:40 UTC | Jul 10, 14:55 UTC | 1h 15m |
| 2026-07-10 | JBU1281 | - | Jul 10, 11:05 UTC | Jul 10, 12:20 UTC | 1h 15m |
| 2026-07-09 | JBU2255 | - | Jul 9, 10:10 UTC | Jul 9, 11:10 UTC | 1h 0m |
| 2026-07-09 | JBU2255 | BOS → DCA | Jul 9, 10:07 UTC | Jul 10, 05:00 UTC | 18h 53m |
| 2026-07-09 | JBU392 | TPA → BOS | Jul 9, 01:05 UTC | Jul 9, 03:45 UTC | 2h 40m |
| 2026-07-08 | JBU391 | BOS → TPA | Jul 8, 21:15 UTC | Jul 9, 00:00 UTC | 2h 45m |
| 2026-07-08 | JBU247 | - | Jul 8, 02:15 UTC | Jul 8, 06:55 UTC | 4h 40m |
| 2026-07-08 | JBU247 | BOS → SLC | Jul 8, 02:14 UTC | Jul 9, 01:00 UTC | 22h 47m |
| 2026-07-07 | JBU1500 | - | Jul 7, 19:20 UTC | Jul 7, 21:50 UTC | 2h 30m |
| 2026-07-07 | JBU1499 | - | Jul 7, 14:40 UTC | Jul 7, 17:05 UTC | 2h 25m |
| 2026-07-06 | JBU2121 | HPN → ACK | Jul 6, 13:04 UTC | Jul 7, 12:05 UTC | 23h 2m |
| 2026-07-05 | JBU2122 | ACK → HPN | Jul 5, 22:53 UTC | Jul 6, 21:00 UTC | 22h 8m |
| 2026-07-05 | JBU2494 | DCA → ACK | Jul 5, 20:43 UTC | Jul 6, 16:45 UTC | 20h 2m |
| 2026-07-05 | JBU2494 | - | Jul 5, 20:45 UTC | Jul 5, 21:40 UTC | 55m |
| 2026-07-05 | JBU855 | BOS → DCA | Jul 5, 17:50 UTC | Jul 5, 19:00 UTC | 1h 10m |
| 2026-07-05 | JBU806 | BNA → BOS | Jul 5, 13:50 UTC | Jul 5, 15:50 UTC | 2h 0m |
| 2026-07-04 | JBU933 | BOS → IAH | Jul 4, 17:05 UTC | Jul 5, 16:00 UTC | 22h 55m |
| 2026-07-04 | JBU741 | - | Jul 4, 10:30 UTC | Jul 4, 12:15 UTC | 1h 45m |
| 2026-07-04 | JBU741 | JFK → SAV | Jul 4, 10:28 UTC | Jul 5, 02:20 UTC | 15h 52m |
| 2026-07-03 | JBU164 | - | Jul 3, 16:10 UTC | Jul 3, 17:00 UTC | 50m |
| 2026-07-03 | JBU163 | JFK → SRQ | Jul 3, 12:40 UTC | Jul 3, 15:05 UTC | 2h 25m |
| 2026-07-03 | JBU163 | JFK → SRQ | Jul 3, 12:37 UTC | Jul 4, 11:00 UTC | 22h 24m |
| 2026-07-03 | JBU136 | PHX → JFK | Jul 3, 06:20 UTC | Jul 3, 10:40 UTC | 4h 20m |
| 2026-07-03 | JBU135 | JFK → PHX | Jul 3, 00:30 UTC | Jul 3, 05:05 UTC | 4h 35m |
| 2026-07-02 | JBU1716 | - | Jul 2, 18:40 UTC | Jul 2, 21:00 UTC | 2h 20m |
| 2026-07-02 | JBU1715 | - | Jul 2, 14:40 UTC | Jul 2, 16:55 UTC | 2h 15m |
| 2026-07-02 | JBU1206 | ORD → JFK | Jul 2, 11:10 UTC | Jul 2, 12:50 UTC | 1h 40m |
| 2026-07-01 | JBU254 | DCA → JFK | Jul 1, 10:30 UTC | Jul 1, 11:15 UTC | 45m |
| 2026-07-01 | JBU254 | DCA → JFK | Jul 1, 10:27 UTC | Jul 2, 03:35 UTC | 17h 9m |
| 2026-07-01 | JBU955 | - | Jul 1, 02:05 UTC | Jul 1, 02:45 UTC | 40m |
| 2026-06-30 | JBU678 | - | Jun 30, 22:05 UTC | Jun 30, 23:55 UTC | 1h 50m |
| 2026-06-30 | JBU677 | - | Jun 30, 18:20 UTC | Jun 30, 20:10 UTC | 1h 50m |
| 2026-06-30 | JBU142 | - | Jun 30, 14:45 UTC | Jun 30, 16:25 UTC | 1h 40m |
| 2026-06-30 | JBU249 | - | Jun 30, 11:10 UTC | Jun 30, 13:10 UTC | 2h 0m |
| 2026-06-30 | JBU392 | - | Jun 30, 00:45 UTC | Jun 30, 03:35 UTC | 2h 51m |
| 2026-06-29 | JBU391 | - | Jun 29, 20:40 UTC | Jun 29, 23:25 UTC | 2h 45m |
| 2026-06-29 | JBU2186 | PIT → BOS | Jun 29, 03:34 UTC | Jun 30, 03:00 UTC | 23h 27m |
| 2026-06-29 | JBU2185 | BOS → BOS | Jun 29, 00:34 UTC | Jun 29, 00:39 UTC | 5m |
| 2026-06-28 | JBU2184 | RDU → BOS | Jun 28, 22:04 UTC | Jun 28, 23:50 UTC | 1h 45m |
| 2026-06-28 | JBU2184 | RDU → BOS | Jun 28, 22:02 UTC | Jun 29, 20:59 UTC | 22h 58m |
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 .