sensors Mode-S transponder
A3871E
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N3261J · operated by JETBLUE AIRWAYS CORP
- Hex
- A3871E
- Octal
- 50703436
- Decimal
- 10,716,958
- Country
- US
- Tail
- N3261J
- Type
- BCS3
- Flights observed
- 165
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address A3871E 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 |
|---|---|---|---|
| JBU502 | JetBlue Airways | 7 | 2026-05-04 |
| JBU159 | JetBlue Airways | 7 | 2026-05-20 |
| JBU1303 | JetBlue Airways | 5 | 2026-05-11 |
| JBU822 | JetBlue Airways | 4 | 2026-05-02 |
| JBU1375 | JetBlue Airways | 4 | 2026-05-16 |
| JBU994 | JetBlue Airways | 3 | 2026-04-14 |
| JBU501 | JetBlue Airways | 3 | 2026-05-26 |
| JBU401 | JetBlue Airways | 3 | 2026-04-17 |
| JBU400 | JetBlue Airways | 3 | 2026-05-18 |
| JBU2467 | JetBlue Airways | 3 | 2026-05-18 |
| JBU2255 | JetBlue Airways | 3 | 2026-05-07 |
| JBU2064 | JetBlue Airways | 3 | 2026-04-15 |
| JBU1652 | - | 3 | 2026-04-13 |
| JBU1231 | - | 3 | 2026-04-14 |
| JBU715 | JetBlue Airways | 2 | 2026-05-24 |
| JBU706 | JetBlue Airways | 2 | 2026-04-21 |
| JBU550 | JetBlue Airways | 2 | 2026-04-25 |
| JBU513 | JetBlue Airways | 2 | 2026-05-17 |
| JBU485 | JetBlue Airways | 2 | 2026-05-26 |
| JBU415 | JetBlue Airways | 2 | 2026-04-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | JBU1186 | JFK → ROC | May 30, 02:35 UTC | May 30, 03:30 UTC | 55m |
| 2026-05-29 | JBU743 | JFK → ANU | May 29, 14:25 UTC | May 30, 00:05 UTC | 9h 41m |
| 2026-05-29 | JBU302 | FLL → JFK | May 29, 10:25 UTC | May 29, 12:50 UTC | 2h 25m |
| 2026-05-28 | JBU1450 | STI → FLL | May 28, 23:50 UTC | May 29, 01:25 UTC | 1h 35m |
| 2026-05-28 | JBU1449 | FLL → STI | May 28, 20:50 UTC | May 28, 21:20 UTC | 30m |
| 2026-05-28 | JBU69 | BOS → FLL | May 28, 15:45 UTC | May 28, 18:40 UTC | 2h 55m |
| 2026-05-28 | JBU352 | BOS → ACK | May 28, 11:50 UTC | May 28, 14:25 UTC | 2h 35m |
| 2026-05-27 | JBU302 | FLL → JFK | May 27, 10:10 UTC | May 28, 01:25 UTC | 15h 15m |
| 2026-05-26 | JBU501 | JFK → FLL | May 26, 17:37 UTC | May 27, 16:40 UTC | 23h 3m |
| 2026-05-26 | JBU485 | ROC → JFK | May 26, 15:00 UTC | May 26, 15:49 UTC | 50m |
| 2026-05-26 | JBU485 | ROC → JFK | May 26, 14:56 UTC | May 27, 12:35 UTC | 21h 39m |
| 2026-05-26 | JBU186 | SAN → JFK | May 26, 13:00 UTC | May 26, 13:50 UTC | 50m |
| 2026-05-25 | JBU2768 | TPA → BQN | May 25, 02:57 UTC | May 25, 11:50 UTC | 8h 54m |
| 2026-05-24 | JBU1499 | BOS → DAB | May 24, 14:54 UTC | May 25, 11:50 UTC | 20h 57m |
| 2026-05-24 | JBU715 | BOS → BUF | May 24, 00:10 UTC | May 24, 01:20 UTC | 1h 10m |
| 2026-05-24 | JBU715 | BOS → BUF | May 24, 00:07 UTC | May 24, 21:45 UTC | 21h 38m |
| 2026-05-23 | JBU1290 | ILM → BOS | May 23, 18:45 UTC | May 23, 20:10 UTC | 1h 25m |
| 2026-05-23 | JBU1293 | BOS → ILM | May 23, 15:30 UTC | May 23, 17:05 UTC | 1h 35m |
| 2026-05-23 | JBU322 | PBI → BOS | May 23, 11:15 UTC | May 23, 13:45 UTC | 2h 30m |
| 2026-05-22 | JBU143 | EWR → PBI | May 22, 22:20 UTC | May 23, 00:40 UTC | 2h 20m |
| 2026-05-22 | JBU1962 | PBI → LGA | May 22, 01:45 UTC | May 22, 04:00 UTC | 2h 15m |
| 2026-05-22 | JBU1962 | PBI → LGA | May 22, 01:42 UTC | May 23, 00:40 UTC | 22h 59m |
| 2026-05-21 | JBU2432 | LGA → BOS | May 21, 16:40 UTC | May 21, 19:10 UTC | 2h 30m |
| 2026-05-21 | JBU1062 | SJU → BOS | May 21, 11:55 UTC | May 21, 14:20 UTC | 2h 25m |
| 2026-05-20 | JBU159 | BOS → PHL | May 20, 10:05 UTC | May 20, 11:05 UTC | 1h 0m |
| 2026-05-20 | JBU159 | BOS → PHL | May 20, 10:03 UTC | May 20, 17:40 UTC | 7h 38m |
| 2026-05-19 | JBU1410 | JAX → BOS | May 19, 22:25 UTC | May 20, 00:50 UTC | 2h 25m |
| 2026-05-19 | JBU209 | JFK → SDQ | May 19, 18:45 UTC | May 19, 21:00 UTC | 2h 15m |
| 2026-05-18 | JBU2467 | BOS → CHS | May 18, 23:20 UTC | May 19, 01:15 UTC | 1h 55m |
| 2026-05-18 | JBU2467 | BOS → CHS | May 18, 23:19 UTC | May 19, 21:00 UTC | 21h 41m |
| 2026-05-18 | JBU400 | MSY → BOS | May 18, 15:45 UTC | May 18, 18:35 UTC | 2h 49m |
| 2026-05-17 | JBU2184 | RDU → BOS | May 17, 19:35 UTC | May 18, 18:45 UTC | 23h 10m |
| 2026-05-17 | JBU513 | ISP → FLL | May 17, 00:55 UTC | May 17, 23:30 UTC | 22h 36m |
| 2026-05-16 | JBU1375 | FLL → KIN | May 16, 15:35 UTC | May 16, 16:10 UTC | 35m |
| 2026-05-16 | JBU1375 | FLL → KIN | May 16, 15:35 UTC | May 17, 15:10 UTC | 23h 36m |
| 2026-05-16 | JBU2625 | RDU → FLL | May 16, 12:16 UTC | May 16, 13:55 UTC | 1h 40m |
| 2026-05-15 | JBU2406 | FLL → EWR | May 15, 11:46 UTC | May 16, 02:55 UTC | 15h 9m |
| 2026-05-14 | JBU2055 | BOS → DCA | May 14, 20:48 UTC | May 15, 18:30 UTC | 21h 42m |
| 2026-05-14 | JBU249 | SAV → BOS | May 14, 12:55 UTC | May 15, 01:55 UTC | 13h 1m |
| 2026-05-14 | JBU984 | RDU → BOS | May 14, 10:00 UTC | May 15, 01:55 UTC | 15h 56m |
| 2026-05-13 | JBU1158 | LIR → FLL | May 13, 19:04 UTC | May 14, 17:30 UTC | 22h 27m |
| 2026-05-13 | JBU1158 | LIR → FLL | May 13, 15:10 UTC | May 13, 21:50 UTC | 6h 40m |
| 2026-05-13 | JBU2005 | BOS → MCO | May 13, 11:10 UTC | May 13, 13:35 UTC | 2h 25m |
| 2026-05-13 | JBU2008 | FLL → PIT | May 13, 00:50 UTC | May 13, 03:15 UTC | 2h 25m |
| 2026-05-11 | JBU1303 | BOS → PHX | May 11, 23:00 UTC | May 12, 17:20 UTC | 18h 21m |
| 2026-05-11 | JBU1007 | BOS → JFK | May 11, 14:36 UTC | May 12, 13:30 UTC | 22h 55m |
| 2026-05-11 | JBU1419 | BOS → JAX | May 11, 02:45 UTC | May 11, 22:35 UTC | 19h 50m |
| 2026-05-10 | JBU1274 | CHS → JFK | May 10, 22:20 UTC | May 10, 23:55 UTC | 1h 35m |
| 2026-05-10 | JBU1274 | CHS → JFK | May 10, 22:19 UTC | May 11, 20:25 UTC | 22h 7m |
| 2026-05-10 | JBU2473 | JFK → CHS | May 10, 18:55 UTC | May 10, 20:35 UTC | 1h 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 N3261J page for operator, model, and routing details .