- Flights observed
- 196
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 4d ago
Last known position
Country allocation
The ICAO 24-bit address A39948 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 |
|---|---|---|---|
| JBU2601 | - | 6 | 2026-07-02 |
| JBU806 | - | 4 | 2026-07-07 |
| JBU385 | - | 4 | 2026-06-22 |
| JBU312 | JetBlue Airways | 4 | 2026-05-30 |
| JBU266 | - | 4 | 2026-07-08 |
| JBU2152 | - | 4 | 2026-07-02 |
| JBU1238 | JetBlue Airways | 4 | 2026-06-20 |
| JBU392 | - | 3 | 2026-06-23 |
| JBU2602 | - | 3 | 2026-07-01 |
| JBU1439 | - | 3 | 2026-06-20 |
| JBU1047 | - | 3 | 2026-07-01 |
| JBU95 | - | 2 | 2026-06-29 |
| JBU947 | JetBlue Airways | 2 | 2026-05-29 |
| JBU940 | JetBlue Airways | 2 | 2026-05-15 |
| JBU811 | JetBlue Airways | 2 | 2026-05-26 |
| JBU791 | - | 2 | 2026-06-30 |
| JBU626 | - | 2 | 2026-06-26 |
| JBU592 | - | 2 | 2026-07-02 |
| JBU591 | - | 2 | 2026-07-03 |
| JBU533 | JetBlue Airways | 2 | 2026-06-30 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-09 | JBU1381 | JFK → IAH | Jul 9, 14:21 UTC | Jul 9, 17:45 UTC | 3h 24m |
| 2026-07-09 | JBU1198 | PIT → JFK | Jul 9, 11:20 UTC | Jul 9, 17:45 UTC | 6h 25m |
| 2026-07-09 | JBU1785 | BOS → PIT | Jul 9, 00:42 UTC | Jul 9, 17:45 UTC | 17h 3m |
| 2026-07-08 | JBU781 | BOS → RIC | Jul 8, 19:59 UTC | Jul 9, 17:45 UTC | 21h 46m |
| 2026-07-08 | JBU266 | RSW → BOS | Jul 8, 15:36 UTC | Jul 9, 14:00 UTC | 22h 25m |
| 2026-07-08 | JBU638 | AUS → BOS | Jul 8, 00:36 UTC | Jul 8, 21:15 UTC | 20h 40m |
| 2026-07-07 | JBU806 | BNA → BOS | Jul 7, 14:15 UTC | Jul 7, 16:15 UTC | 2h 0m |
| 2026-07-07 | JBU806 | BNA → BOS | Jul 7, 14:10 UTC | Jul 8, 14:00 UTC | 23h 51m |
| 2026-07-07 | JBU1207 | BOS → BNA | Jul 7, 10:45 UTC | Jul 7, 13:00 UTC | 2h 15m |
| 2026-07-06 | JBU51 | BOS → MCO | Jul 6, 16:20 UTC | Jul 6, 18:55 UTC | 2h 35m |
| 2026-07-06 | JBU51 | BOS → MCO | Jul 6, 16:20 UTC | Jul 7, 16:00 UTC | 23h 41m |
| 2026-07-06 | JBU1282 | - | Jul 6, 13:50 UTC | Jul 6, 15:00 UTC | 1h 10m |
| 2026-07-05 | JBU896 | ATL → BOS | Jul 5, 18:00 UTC | Jul 6, 16:00 UTC | 22h 0m |
| 2026-07-05 | JBU1337 | BOS → DTW | Jul 5, 00:40 UTC | Jul 5, 02:25 UTC | 1h 45m |
| 2026-07-05 | JBU1337 | BOS → DTW | Jul 5, 00:39 UTC | Jul 5, 22:50 UTC | 22h 12m |
| 2026-07-04 | JBU654 | - | Jul 4, 18:30 UTC | Jul 4, 19:35 UTC | 1h 5m |
| 2026-07-03 | JBU400 | MSY → BOS | Jul 3, 19:20 UTC | Jul 3, 22:30 UTC | 3h 10m |
| 2026-07-03 | JBU400 | MSY → BOS | Jul 3, 19:16 UTC | Jul 4, 16:20 UTC | 21h 5m |
| 2026-07-03 | JBU401 | - | Jul 3, 15:00 UTC | Jul 3, 18:00 UTC | 3h 0m |
| 2026-07-03 | JBU1192 | TPA → BOS | Jul 3, 10:55 UTC | Jul 3, 13:30 UTC | 2h 35m |
| 2026-07-03 | JBU591 | - | Jul 3, 02:30 UTC | Jul 3, 05:10 UTC | 2h 40m |
| 2026-07-02 | JBU592 | TPA → BOS | Jul 2, 22:15 UTC | Jul 3, 00:45 UTC | 2h 30m |
| 2026-07-02 | JBU2152 | - | Jul 2, 18:35 UTC | Jul 2, 19:30 UTC | 55m |
| 2026-07-02 | JBU2152 | - | Jul 2, 16:55 UTC | Jul 2, 17:10 UTC | 15m |
| 2026-07-02 | JBU2601 | - | Jul 2, 15:10 UTC | Jul 2, 15:35 UTC | 25m |
| 2026-07-02 | JBU2601 | HPN → SJU | Jul 2, 12:10 UTC | Jul 2, 15:35 UTC | 3h 25m |
| 2026-07-02 | JBU2601 | - | Jul 2, 12:10 UTC | Jul 2, 12:55 UTC | 45m |
| 2026-07-01 | JBU2602 | - | Jul 1, 23:45 UTC | Jul 2, 00:40 UTC | 55m |
| 2026-07-01 | JBU2602 | - | Jul 1, 21:05 UTC | Jul 1, 21:20 UTC | 15m |
| 2026-07-01 | JBU1047 | - | Jul 1, 16:05 UTC | Jul 1, 19:30 UTC | 3h 25m |
| 2026-06-30 | JBU533 | BDL → TPA | Jun 30, 21:45 UTC | Jul 1, 19:30 UTC | 21h 46m |
| 2026-06-30 | JBU534 | TPA → BDL | Jun 30, 17:39 UTC | Jul 1, 14:25 UTC | 20h 47m |
| 2026-06-30 | JBU791 | BOS → TPA | Jun 30, 13:25 UTC | Jul 1, 11:25 UTC | 22h 1m |
| 2026-06-30 | JBU96 | PDX → BOS | Jun 30, 06:27 UTC | Jul 1, 03:55 UTC | 21h 28m |
| 2026-06-29 | JBU95 | BOS → PDX | Jun 29, 23:34 UTC | Jun 30, 05:20 UTC | 5h 46m |
| 2026-06-29 | JBU95 | BOS → PDX | Jun 29, 23:31 UTC | Jun 30, 22:00 UTC | 22h 30m |
| 2026-06-29 | JBU1151 | - | Jun 29, 19:49 UTC | Jun 29, 20:15 UTC | 25m |
| 2026-06-29 | JBU2432 | - | Jun 29, 17:45 UTC | Jun 29, 18:25 UTC | 40m |
| 2026-06-29 | JBU831 | - | Jun 29, 15:19 UTC | Jun 29, 16:10 UTC | 50m |
| 2026-06-29 | JBU2352 | - | Jun 29, 13:44 UTC | Jun 29, 14:04 UTC | 20m |
| 2026-06-28 | JBU394 | - | Jun 28, 21:40 UTC | Jun 29, 01:14 UTC | 3h 35m |
| 2026-06-28 | JBU793 | - | Jun 28, 15:40 UTC | Jun 28, 19:40 UTC | 4h 0m |
| 2026-06-28 | JBU1192 | TPA → BOS | Jun 28, 11:25 UTC | Jun 28, 14:19 UTC | 2h 55m |
| 2026-06-27 | JBU1536 | STI → JFK | Jun 27, 11:27 UTC | Jun 28, 02:49 UTC | 15h 23m |
| 2026-06-26 | JBU1536 | JFK → JFK | Jun 26, 23:49 UTC | Jun 27, 14:45 UTC | 14h 55m |
| 2026-06-26 | JBU2901 | JFK → FLL | Jun 26, 19:35 UTC | Jun 26, 20:40 UTC | 1h 5m |
| 2026-06-26 | JBU2902 | JFK → BUF | Jun 26, 17:25 UTC | Jun 26, 18:24 UTC | 1h 0m |
| 2026-06-26 | JBU626 | TPA → JFK | Jun 26, 13:30 UTC | Jun 26, 15:49 UTC | 2h 20m |
| 2026-06-25 | JBU2601 | - | Jun 25, 16:09 UTC | Jun 25, 16:29 UTC | 20m |
| 2026-06-25 | JBU2601 | - | Jun 25, 12:35 UTC | Jun 25, 13:59 UTC | 1h 25m |
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 N3308J page for operator, model, and routing details .