- Flights observed
- 53
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 1h ago
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 |
|---|---|---|---|
| JBU947 | JetBlue Airways | 2 | 2026-05-29 |
| JBU940 | JetBlue Airways | 2 | 2026-05-15 |
| JBU811 | JetBlue Airways | 2 | 2026-05-26 |
| JBU312 | JetBlue Airways | 2 | 2026-05-22 |
| JBU2116 | JetBlue Airways | 2 | 2026-05-17 |
| JBU1300 | JetBlue Airways | 2 | 2026-05-20 |
| JBU1293 | JetBlue Airways | 2 | 2026-05-26 |
| JBU1160 | JetBlue Airways | 2 | 2026-05-28 |
| JBU1159 | JetBlue Airways | 2 | 2026-05-28 |
| JBU109 | JetBlue Airways | 2 | 2026-05-25 |
| JBU1012 | JetBlue Airways | 2 | 2026-05-22 |
| JBU1007 | JetBlue Airways | 2 | 2026-05-14 |
| JBU905 | JetBlue Airways | 1 | 2026-05-13 |
| JBU8692 | JetBlue Airways | 1 | 2026-05-11 |
| JBU830 | JetBlue Airways | 1 | 2026-05-23 |
| JBU806 | JetBlue Airways | 1 | 2026-05-26 |
| JBU2902 | JetBlue Airways | 1 | 2026-05-16 |
| JBU2901 | JetBlue Airways | 1 | 2026-05-16 |
| JBU2896 | JetBlue Airways | 1 | 2026-05-27 |
| JBU2783 | JetBlue Airways | 1 | 2026-05-23 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | JBU947 | JFK → BZN | May 29, 16:50 UTC | May 29, 18:40 UTC | 1h 50m |
| 2026-05-29 | JBU947 | JFK → BZN | May 29, 16:47 UTC | May 30, 00:00 UTC | 7h 14m |
| 2026-05-29 | JBU1151 | BOS → MCO | May 29, 15:00 UTC | May 29, 15:25 UTC | 25m |
| 2026-05-29 | JBU2121 | HPN → ACK | May 29, 13:10 UTC | May 29, 13:50 UTC | 40m |
| 2026-05-28 | JBU1352 | MCO → BOS | May 28, 15:47 UTC | May 29, 13:50 UTC | 22h 3m |
| 2026-05-28 | JBU1160 | PHL → BOS | May 28, 13:30 UTC | May 28, 14:00 UTC | 30m |
| 2026-05-28 | JBU1160 | PHL → BOS | May 28, 13:25 UTC | May 29, 02:35 UTC | 13h 10m |
| 2026-05-28 | JBU1159 | BOS → PHL | May 28, 11:00 UTC | May 28, 12:00 UTC | 1h 0m |
| 2026-05-28 | JBU1159 | BOS → PHL | May 28, 10:55 UTC | May 29, 02:35 UTC | 15h 40m |
| 2026-05-28 | JBU2468 | CHS → BOS | May 28, 03:05 UTC | May 28, 04:50 UTC | 1h 45m |
| 2026-05-27 | JBU2467 | BOS → CHS | May 27, 23:30 UTC | May 28, 02:05 UTC | 2h 35m |
| 2026-05-27 | JBU2896 | PUJ → BOS | May 27, 11:05 UTC | May 27, 20:20 UTC | 9h 15m |
| 2026-05-26 | JBU811 | BOS → ORD | May 26, 22:14 UTC | May 27, 22:00 UTC | 23h 47m |
| 2026-05-26 | JBU1293 | BOS → ILM | May 26, 15:24 UTC | May 26, 16:55 UTC | 1h 30m |
| 2026-05-26 | JBU1293 | BOS → ILM | May 26, 15:20 UTC | May 27, 11:45 UTC | 20h 26m |
| 2026-05-26 | JBU806 | LAX → SEA | May 26, 11:54 UTC | May 26, 13:50 UTC | 1h 55m |
| 2026-05-25 | JBU109 | BOS → JAX | May 25, 11:35 UTC | May 25, 14:00 UTC | 2h 25m |
| 2026-05-25 | JBU109 | BOS → JAX | May 25, 11:33 UTC | May 26, 03:19 UTC | 15h 47m |
| 2026-05-24 | JBU1231 | BOS → LGA | May 24, 13:02 UTC | May 25, 12:00 UTC | 22h 59m |
| 2026-05-23 | JBU830 | RSW → JFK | May 23, 23:57 UTC | May 24, 21:40 UTC | 21h 43m |
| 2026-05-23 | JBU1002 | FLL → JFK | May 23, 14:17 UTC | May 24, 14:00 UTC | 23h 43m |
| 2026-05-23 | JBU2783 | BOS → RDU | May 23, 01:11 UTC | May 23, 19:30 UTC | 18h 19m |
| 2026-05-22 | JBU312 | ORD → BOS | May 22, 14:00 UTC | May 23, 12:00 UTC | 22h 0m |
| 2026-05-22 | JBU1012 | ORD → BOS | May 22, 01:35 UTC | May 22, 03:15 UTC | 1h 40m |
| 2026-05-22 | JBU1012 | ORD → BOS | May 22, 01:34 UTC | May 22, 22:30 UTC | 20h 57m |
| 2026-05-21 | JBU811 | BOS → ORD | May 21, 21:45 UTC | May 22, 00:15 UTC | 2h 30m |
| 2026-05-21 | JBU1238 | AUS → BOS | May 21, 16:40 UTC | May 21, 20:10 UTC | 3h 30m |
| 2026-05-21 | JBU1439 | BOS → AUS | May 21, 11:25 UTC | May 21, 15:30 UTC | 4h 5m |
| 2026-05-20 | JBU266 | DTW → BOS | May 20, 20:00 UTC | May 21, 18:00 UTC | 22h 1m |
| 2026-05-20 | JBU265 | SMF → LGB | May 20, 15:55 UTC | May 20, 16:00 UTC | 5m |
| 2026-05-20 | JBU1300 | MSY → BOS | May 20, 11:15 UTC | May 20, 14:25 UTC | 3h 10m |
| 2026-05-20 | JBU1300 | MSY → BOS | May 20, 11:12 UTC | May 21, 01:25 UTC | 14h 14m |
| 2026-05-19 | JBU1301 | BOS → MSY | May 19, 22:55 UTC | May 20, 02:05 UTC | 3h 10m |
| 2026-05-18 | JBU1785 | BOS → PIT | May 18, 17:22 UTC | May 19, 12:00 UTC | 18h 38m |
| 2026-05-17 | JBU1782 | VPS → BOS | May 17, 21:07 UTC | May 18, 18:40 UTC | 21h 33m |
| 2026-05-17 | JBU1781 | BOS → MCO | May 17, 16:57 UTC | May 18, 15:30 UTC | 22h 34m |
| 2026-05-17 | JBU2116 | SFO → JFK | May 17, 14:20 UTC | May 17, 15:20 UTC | 1h 0m |
| 2026-05-17 | JBU2116 | SFO → JFK | May 17, 14:20 UTC | May 18, 13:15 UTC | 22h 56m |
| 2026-05-17 | JBU2115 | JFK → SFO | May 17, 12:05 UTC | May 17, 13:15 UTC | 1h 10m |
| 2026-05-17 | JBU1118 | JFK → BOS | May 17, 03:10 UTC | May 17, 03:55 UTC | 45m |
| 2026-05-17 | JBU201 | BUF → JFK | May 17, 00:05 UTC | May 17, 01:15 UTC | 1h 10m |
| 2026-05-16 | JBU2902 | JFK → BUF | May 16, 17:40 UTC | May 16, 18:40 UTC | 1h 0m |
| 2026-05-16 | JBU2901 | JFK → FLL | May 16, 14:51 UTC | May 16, 15:45 UTC | 55m |
| 2026-05-16 | JBU1602 | JFK → BUF | May 16, 12:05 UTC | May 16, 13:01 UTC | 55m |
| 2026-05-15 | JBU940 | LGA → JAX | May 15, 13:25 UTC | May 15, 15:00 UTC | 1h 34m |
| 2026-05-15 | JBU940 | LGA → JAX | May 15, 13:25 UTC | May 16, 12:01 UTC | 22h 36m |
| 2026-05-14 | JBU1007 | BOS → JFK | May 14, 14:35 UTC | May 14, 16:55 UTC | 2h 20m |
| 2026-05-14 | JBU1007 | BOS → JFK | May 14, 14:35 UTC | May 15, 14:00 UTC | 23h 26m |
| 2026-05-14 | JBU1336 | DTW → BOS | May 14, 11:55 UTC | May 14, 13:25 UTC | 1h 30m |
| 2026-05-14 | JBU2737 | JFK → LAX | May 14, 00:20 UTC | May 14, 02:00 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 N3308J page for operator, model, and routing details .