sensors Mode-S transponder
A3514F
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N3125J · operated by JETBLUE AIRWAYS CORP
- Hex
- A3514F
- Octal
- 50650517
- Decimal
- 10,703,183
- Country
- US
- Tail
- N3125J
- Type
- BCS3
- Flights observed
- 173
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address A3514F 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 |
|---|---|---|---|
| JBU855 | JetBlue Airways | 19 | 2026-05-19 |
| JBU546 | JetBlue Airways | 12 | 2026-05-19 |
| JBU547 | JetBlue Airways | 11 | 2026-05-14 |
| JBU1056 | JetBlue Airways | 11 | 2026-05-20 |
| JBU2523 | JetBlue Airways | 5 | 2026-05-03 |
| JBU927 | JetBlue Airways | 3 | 2026-04-29 |
| JBU828 | JetBlue Airways | 3 | 2026-04-29 |
| JBU470 | - | 3 | 2026-04-13 |
| JBU2854 | JetBlue Airways | 3 | 2026-05-02 |
| JBU1923 | JetBlue Airways | 3 | 2026-04-19 |
| JBU1875 | JetBlue Airways | 3 | 2026-04-29 |
| JBU1355 | JetBlue Airways | 3 | 2026-05-02 |
| JBU1310 | - | 3 | 2026-04-13 |
| JBU1109 | - | 3 | 2026-04-16 |
| JBU109 | - | 3 | 2026-04-13 |
| JBU8525 | JetBlue Airways | 2 | 2026-04-26 |
| JBU783 | JetBlue Airways | 2 | 2026-04-20 |
| JBU640 | - | 2 | 2026-04-17 |
| JBU627 | JetBlue Airways | 2 | 2026-05-21 |
| JBU396 | JetBlue Airways | 2 | 2026-05-24 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | JBU391 | BOS → TPA | May 29, 20:55 UTC | May 29, 23:45 UTC | 2h 50m |
| 2026-05-29 | JBU896 | ATL → BOS | May 29, 17:05 UTC | May 29, 19:05 UTC | 2h 0m |
| 2026-05-29 | JBU1097 | BOS → ATL | May 29, 13:30 UTC | May 29, 15:35 UTC | 2h 5m |
| 2026-05-29 | JBU2718 | JFK → BOS | May 29, 11:00 UTC | May 29, 11:40 UTC | 40m |
| 2026-05-28 | JBU2602 | JFK → BUF | May 28, 03:35 UTC | May 28, 04:45 UTC | 1h 10m |
| 2026-05-28 | JBU2602 | JFK → BUF | May 28, 01:05 UTC | May 28, 01:20 UTC | 15m |
| 2026-05-27 | JBU261 | BOS → SJU | May 27, 19:10 UTC | May 27, 22:40 UTC | 3h 30m |
| 2026-05-27 | JBU261 | BOS → SJU | May 27, 13:45 UTC | May 27, 14:55 UTC | 1h 10m |
| 2026-05-26 | JBU1012 | ORD → BOS | May 26, 02:53 UTC | May 27, 00:04 UTC | 21h 12m |
| 2026-05-25 | JBU1238 | AUS → BOS | May 25, 17:43 UTC | May 26, 15:45 UTC | 22h 2m |
| 2026-05-25 | JBU1439 | BOS → AUS | May 25, 11:15 UTC | May 26, 04:39 UTC | 17h 25m |
| 2026-05-25 | JBU1439 | BOS → AUS | May 25, 11:15 UTC | May 25, 15:30 UTC | 4h 15m |
| 2026-05-24 | JBU396 | PUJ → BOS | May 24, 23:30 UTC | May 25, 02:30 UTC | 3h 0m |
| 2026-05-24 | JBU396 | PUJ → BOS | May 24, 21:35 UTC | May 24, 21:45 UTC | 10m |
| 2026-05-24 | JBU95 | BOS → PUJ | May 24, 14:10 UTC | May 24, 19:50 UTC | 5h 40m |
| 2026-05-24 | JBU540 | JAX → LGA | May 24, 11:25 UTC | May 24, 12:45 UTC | 1h 20m |
| 2026-05-23 | JBU1814 | ORF → BOS | May 23, 15:00 UTC | May 23, 15:45 UTC | 45m |
| 2026-05-23 | JBU1814 | ORF → BOS | May 23, 14:57 UTC | May 24, 13:45 UTC | 22h 48m |
| 2026-05-23 | JBU1813 | BOS → ORF | May 23, 12:24 UTC | May 24, 11:45 UTC | 23h 21m |
| 2026-05-23 | JBU1813 | BOS → ORF | May 23, 12:25 UTC | May 23, 13:50 UTC | 1h 25m |
| 2026-05-22 | JBU1678 | JAX → JFK | May 22, 10:17 UTC | May 23, 07:50 UTC | 21h 33m |
| 2026-05-21 | JBU627 | JFK → POP | May 21, 15:45 UTC | May 21, 16:15 UTC | 30m |
| 2026-05-21 | JBU627 | JFK → POP | May 21, 15:41 UTC | May 22, 13:45 UTC | 22h 4m |
| 2026-05-21 | JBU2584 | MCO → JFK | May 21, 10:25 UTC | May 21, 12:40 UTC | 2h 15m |
| 2026-05-20 | JBU1056 | FLL → EWR | May 20, 11:40 UTC | May 21, 01:20 UTC | 13h 41m |
| 2026-05-19 | JBU546 | MCO → ISP | May 19, 19:15 UTC | May 20, 17:40 UTC | 22h 26m |
| 2026-05-19 | JBU855 | JFK → PLS | May 19, 15:20 UTC | May 19, 15:45 UTC | 25m |
| 2026-05-19 | JBU1056 | FLL → EWR | May 19, 11:40 UTC | May 19, 14:00 UTC | 2h 20m |
| 2026-05-19 | JBU1056 | FLL → EWR | May 19, 11:40 UTC | May 20, 09:40 UTC | 22h 1m |
| 2026-05-18 | JBU855 | JFK → PLS | May 18, 15:20 UTC | May 18, 17:35 UTC | 2h 15m |
| 2026-05-18 | JBU855 | JFK → PLS | May 18, 15:16 UTC | May 19, 13:45 UTC | 22h 29m |
| 2026-05-18 | JBU1056 | FLL → EWR | May 18, 11:40 UTC | May 18, 14:00 UTC | 2h 20m |
| 2026-05-17 | JBU855 | JFK → PLS | May 17, 15:18 UTC | May 18, 13:45 UTC | 22h 28m |
| 2026-05-17 | JBU1056 | FLL → EWR | May 17, 11:43 UTC | May 18, 08:55 UTC | 21h 13m |
| 2026-05-16 | JBU546 | MCO → ISP | May 16, 19:15 UTC | May 17, 17:45 UTC | 22h 31m |
| 2026-05-16 | JBU855 | JFK → PLS | May 16, 15:16 UTC | May 17, 13:45 UTC | 22h 30m |
| 2026-05-16 | JBU1056 | FLL → EWR | May 16, 11:46 UTC | May 16, 14:05 UTC | 2h 20m |
| 2026-05-15 | JBU546 | MCO → ISP | May 15, 19:19 UTC | May 16, 17:45 UTC | 22h 27m |
| 2026-05-15 | JBU855 | JFK → PLS | May 15, 15:25 UTC | May 15, 17:45 UTC | 2h 20m |
| 2026-05-15 | JBU855 | JFK → PLS | May 15, 15:23 UTC | May 16, 13:46 UTC | 22h 23m |
| 2026-05-15 | JBU1056 | FLL → EWR | May 15, 11:45 UTC | May 15, 14:15 UTC | 2h 30m |
| 2026-05-14 | JBU546 | MCO → ISP | May 14, 19:20 UTC | May 14, 19:45 UTC | 25m |
| 2026-05-14 | JBU855 | JFK → PLS | May 14, 15:30 UTC | May 14, 17:45 UTC | 2h 15m |
| 2026-05-14 | JBU855 | JFK → PLS | May 14, 15:24 UTC | May 15, 13:45 UTC | 22h 22m |
| 2026-05-14 | JBU547 | EWR → PBI | May 14, 11:45 UTC | May 14, 14:01 UTC | 2h 15m |
| 2026-05-13 | JBU1056 | FLL → EWR | May 13, 11:35 UTC | May 14, 09:45 UTC | 22h 11m |
| 2026-05-12 | JBU547 | EWR → PBI | May 12, 23:10 UTC | May 13, 21:45 UTC | 22h 36m |
| 2026-05-12 | JBU855 | JFK → PLS | May 12, 15:19 UTC | May 13, 13:45 UTC | 22h 27m |
| 2026-05-11 | JBU546 | MCO → ISP | May 11, 19:51 UTC | May 12, 19:45 UTC | 23h 55m |
| 2026-05-11 | JBU855 | JFK → PLS | May 11, 15:29 UTC | May 12, 13:45 UTC | 22h 17m |
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 N3125J page for operator, model, and routing details .