- Flights observed
- 228
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 26, 22:00 UTC
Current 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 |
| JBU854 | - | 2 | 2026-07-21 |
| JBU8380 | - | 2 | 2026-07-14 |
| JBU811 | JetBlue Airways | 2 | 2026-05-26 |
| JBU791 | - | 2 | 2026-06-30 |
| JBU626 | - | 2 | 2026-06-26 |
| JBU592 | - | 2 | 2026-07-02 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | JBU1902 | FLL → JFK | Jul 26, 02:55 UTC | Jul 26, 22:00 UTC | 19h 6m |
| 2026-07-25 | JBU1501 | JFK → FLL | Jul 25, 21:15 UTC | Jul 25, 23:45 UTC | 2h 30m |
| 2026-07-25 | JBU1501 | JFK → FLL | Jul 25, 21:11 UTC | Jul 26, 17:20 UTC | 20h 10m |
| 2026-07-25 | JBU1060 | KIN → JFK | Jul 25, 09:35 UTC | Jul 25, 18:15 UTC | 8h 40m |
| 2026-07-24 | JBU1868 | PBI → HPN | Jul 24, 14:20 UTC | Jul 25, 11:50 UTC | 21h 30m |
| 2026-07-23 | JBU71 | JFK → SLC | Jul 23, 23:15 UTC | Jul 24, 20:00 UTC | 20h 45m |
| 2026-07-23 | JBU1054 | PBI → JFK | Jul 23, 18:30 UTC | Jul 24, 16:30 UTC | 22h 0m |
| 2026-07-23 | JBU2322 | PBI → BOS | Jul 23, 01:05 UTC | Jul 23, 04:00 UTC | 2h 55m |
| 2026-07-23 | JBU2322 | PBI → BOS | Jul 23, 01:04 UTC | Jul 24, 00:00 UTC | 22h 56m |
| 2026-07-22 | JBU2321 | BOS → PBI | Jul 22, 21:10 UTC | Jul 22, 23:55 UTC | 2h 45m |
| 2026-07-22 | JBU8432 | BOS → LGA | Jul 22, 15:45 UTC | Jul 22, 18:15 UTC | 2h 30m |
| 2026-07-21 | JBU854 | - | Jul 21, 10:55 UTC | Jul 21, 13:15 UTC | 2h 20m |
| 2026-07-21 | JBU854 | - | Jul 21, 10:51 UTC | Jul 21, 19:50 UTC | 8h 59m |
| 2026-07-20 | JBU2954 | DCA → BOS | Jul 20, 00:25 UTC | Jul 20, 01:30 UTC | 1h 5m |
| 2026-07-20 | JBU2954 | DCA → BOS | Jul 20, 00:22 UTC | Jul 20, 16:30 UTC | 16h 9m |
| 2026-07-19 | JBU324D | MCO → DCA | Jul 19, 19:30 UTC | Jul 19, 21:15 UTC | 1h 45m |
| 2026-07-19 | JBU324D | MCO → DCA | Jul 19, 14:05 UTC | Jul 19, 16:15 UTC | 2h 10m |
| 2026-07-19 | JBU1086 | DTW → BOS | Jul 19, 10:40 UTC | Jul 19, 12:55 UTC | 2h 15m |
| 2026-07-18 | JBU1043 | ROC → MCO | Jul 18, 19:30 UTC | Jul 18, 20:00 UTC | 30m |
| 2026-07-18 | JBU1042 | SAV → JFK | Jul 18, 15:45 UTC | Jul 18, 18:15 UTC | 2h 30m |
| 2026-07-18 | JBU1042 | SAV → JFK | Jul 18, 15:45 UTC | Jul 19, 12:55 UTC | 21h 11m |
| 2026-07-18 | JBU183 | JFK → MCO | Jul 18, 12:00 UTC | Jul 18, 14:05 UTC | 2h 5m |
| 2026-07-18 | JBU359 | BUR → JFK | Jul 18, 04:50 UTC | Jul 18, 09:50 UTC | 5h 0m |
| 2026-07-17 | JBU358 | JFK → BUR | Jul 17, 22:00 UTC | Jul 18, 03:20 UTC | 5h 21m |
| 2026-07-17 | JBU1736 | - | Jul 17, 12:15 UTC | Jul 17, 19:55 UTC | 7h 40m |
| 2026-07-16 | JBU625 | JFK → TPA | Jul 16, 19:15 UTC | Jul 17, 12:35 UTC | 17h 20m |
| 2026-07-16 | JBU184 | MCO → JFK | Jul 16, 15:19 UTC | Jul 16, 17:30 UTC | 2h 10m |
| 2026-07-16 | JBU184 | MCO → JFK | Jul 16, 15:19 UTC | Jul 17, 12:35 UTC | 21h 16m |
| 2026-07-16 | JBU737 | - | Jul 16, 11:25 UTC | Jul 16, 13:45 UTC | 2h 20m |
| 2026-07-15 | JBU1085 | BUF → MCO | Jul 15, 14:05 UTC | Jul 16, 14:00 UTC | 23h 55m |
| 2026-07-14 | JBU8380 | - | Jul 14, 18:40 UTC | Jul 14, 20:40 UTC | 2h 0m |
| 2026-07-14 | JBU8380 | IAH → MCO | Jul 14, 18:38 UTC | Jul 15, 17:00 UTC | 22h 22m |
| 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 |
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 .