sensors Mode-S transponder
A8712A
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N643JB · AIRBUS A-320 · operated by JETBLUE AIRWAYS CORP
- Hex
- A8712A
- Octal
- 52070452
- Decimal
- 11,039,018
- Country
- US
- Tail
- N643JB
- Type
- A320
- Flights observed
- 256
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 4h ago
Current position
Country allocation
The ICAO 24-bit address A8712A 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 |
|---|---|---|---|
| JBU553 | JetBlue Airways | 5 | 2026-05-11 |
| JBU1476 | - | 5 | 2026-07-09 |
| JBU1457 | - | 4 | 2026-04-13 |
| JBU1103 | JetBlue Airways | 4 | 2026-06-01 |
| JBU959 | JetBlue Airways | 3 | 2026-06-05 |
| JBU754 | JetBlue Airways | 3 | 2026-06-02 |
| JBU551 | - | 3 | 2026-06-25 |
| JBU281 | JetBlue Airways | 3 | 2026-06-19 |
| JBU2251 | JetBlue Airways | 3 | 2026-04-15 |
| JBU2204 | JetBlue Airways | 3 | 2026-04-14 |
| JBU1742 | - | 3 | 2026-07-09 |
| JBU1703 | JetBlue Airways | 3 | 2026-06-08 |
| JBU1475 | - | 3 | 2026-07-09 |
| JBU143 | JetBlue Airways | 3 | 2026-05-15 |
| JBU987 | JetBlue Airways | 2 | 2026-04-26 |
| JBU967 | JetBlue Airways | 2 | 2026-04-16 |
| JBU8451 | JetBlue Airways | 2 | 2026-06-27 |
| JBU831 | JetBlue Airways | 2 | 2026-05-28 |
| JBU814 | JetBlue Airways | 2 | 2026-04-22 |
| JBU767 | JetBlue Airways | 2 | 2026-05-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | JBU2448 | SDQ → FLL | Jul 13, 22:01 UTC | Jul 14, 00:00 UTC | 2h 0m |
| 2026-07-13 | JBU1677 | JFK → JAX | Jul 13, 02:36 UTC | Jul 14, 00:00 UTC | 21h 25m |
| 2026-07-12 | JBU2584 | MCO → JFK | Jul 12, 10:14 UTC | Jul 13, 04:35 UTC | 18h 22m |
| 2026-07-12 | JBU1727 | EWR → MCO | Jul 12, 01:06 UTC | Jul 13, 00:05 UTC | 23h 0m |
| 2026-07-12 | JBU1727 | EWR → MCO | Jul 12, 01:10 UTC | Jul 12, 03:20 UTC | 2h 10m |
| 2026-07-11 | JBU2420 | - | Jul 11, 20:05 UTC | Jul 11, 21:15 UTC | 1h 10m |
| 2026-07-11 | JBU2420 | - | Jul 11, 17:00 UTC | Jul 11, 17:15 UTC | 15m |
| 2026-07-10 | JBU1728 | MCO → EWR | Jul 10, 21:27 UTC | Jul 11, 20:30 UTC | 23h 4m |
| 2026-07-10 | JBU1743 | - | Jul 10, 02:10 UTC | Jul 10, 02:30 UTC | 20m |
| 2026-07-10 | JBU1743 | JAX → SJU | Jul 10, 02:10 UTC | Jul 10, 23:50 UTC | 21h 41m |
| 2026-07-09 | JBU1742 | - | Jul 9, 23:40 UTC | Jul 10, 00:50 UTC | 1h 10m |
| 2026-07-09 | JBU1742 | - | Jul 9, 21:55 UTC | Jul 9, 22:05 UTC | 10m |
| 2026-07-09 | JBU1742 | SJU → JAX | Jul 9, 21:50 UTC | Jul 10, 19:25 UTC | 21h 35m |
| 2026-07-09 | JBU1475 | - | Jul 9, 20:10 UTC | Jul 9, 20:30 UTC | 20m |
| 2026-07-09 | JBU1475 | - | Jul 9, 17:00 UTC | Jul 9, 17:45 UTC | 45m |
| 2026-07-09 | JBU1476 | - | Jul 9, 14:20 UTC | Jul 9, 15:20 UTC | 1h 0m |
| 2026-07-09 | JBU1476 | - | Jul 9, 11:50 UTC | Jul 9, 12:00 UTC | 10m |
| 2026-07-08 | JBU1015 | EWR → PUJ | Jul 8, 14:05 UTC | Jul 9, 12:00 UTC | 21h 56m |
| 2026-07-08 | JBU709 | JFK → SDQ | Jul 8, 01:43 UTC | Jul 8, 23:15 UTC | 21h 32m |
| 2026-07-07 | JBU1851 | JFK → CUN | Jul 7, 14:15 UTC | Jul 7, 17:40 UTC | 3h 25m |
| 2026-07-07 | JBU1851 | JFK → CUN | Jul 7, 14:15 UTC | Jul 8, 11:50 UTC | 21h 36m |
| 2026-07-07 | JBU1678 | - | Jul 7, 10:40 UTC | Jul 7, 12:30 UTC | 1h 50m |
| 2026-07-06 | JBU320 | ATL → JFK | Jul 6, 10:57 UTC | Jul 7, 05:15 UTC | 18h 19m |
| 2026-07-06 | JBU1798 | - | Jul 6, 02:50 UTC | Jul 6, 04:05 UTC | 1h 15m |
| 2026-07-06 | JBU1798 | FLL → ATL | Jul 6, 02:45 UTC | Jul 7, 00:40 UTC | 21h 56m |
| 2026-07-05 | JBU8600 | - | Jul 5, 20:15 UTC | Jul 5, 22:35 UTC | 2h 20m |
| 2026-06-27 | JBU8451 | JFK → QRO | Jun 27, 16:20 UTC | Jun 27, 18:45 UTC | 2h 25m |
| 2026-06-27 | JBU8451 | JFK → QRO | Jun 27, 16:19 UTC | Jun 27, 18:45 UTC | 2h 26m |
| 2026-06-25 | JBU551 | - | Jun 25, 22:34 UTC | Jun 26, 00:30 UTC | 1h 55m |
| 2026-06-25 | JBU551 | BOS → MCO | Jun 25, 22:32 UTC | Jun 26, 01:15 UTC | 2h 43m |
| 2026-06-25 | JBU618 | JFK → BOS | Jun 25, 20:25 UTC | Jun 25, 20:59 UTC | 35m |
| 2026-06-25 | JBU164 | - | Jun 25, 16:05 UTC | Jun 25, 18:19 UTC | 2h 15m |
| 2026-06-25 | JBU163 | JFK → SRQ | Jun 25, 12:25 UTC | Jun 25, 14:50 UTC | 2h 25m |
| 2026-06-25 | JBU1902 | - | Jun 25, 02:30 UTC | Jun 25, 04:54 UTC | 2h 25m |
| 2026-06-24 | JBU2071 | - | Jun 24, 17:05 UTC | Jun 24, 22:19 UTC | 5h 15m |
| 2026-06-22 | JBU172 | FLL → LGA | Jun 22, 15:54 UTC | Jun 22, 18:15 UTC | 2h 20m |
| 2026-06-22 | JBU172 | FLL → LGA | Jun 22, 15:50 UTC | Jun 23, 04:25 UTC | 12h 35m |
| 2026-06-22 | JBU1505 | EWR → FLL | Jun 22, 11:50 UTC | Jun 22, 14:19 UTC | 2h 30m |
| 2026-06-21 | JBU388 | LAX → BOS | Jun 21, 15:30 UTC | Jun 21, 16:30 UTC | 1h 0m |
| 2026-06-21 | JBU388 | LAX → BOS | Jun 21, 15:24 UTC | Jun 22, 14:19 UTC | 22h 56m |
| 2026-06-21 | JBU1461 | LGA → PBI | Jun 21, 11:34 UTC | Jun 21, 13:50 UTC | 2h 15m |
| 2026-06-20 | JBU94 | MCO → HPN | Jun 20, 13:09 UTC | Jun 21, 12:24 UTC | 23h 16m |
| 2026-06-20 | JBU883 | JFK → MCO | Jun 20, 09:10 UTC | Jun 20, 23:59 UTC | 14h 50m |
| 2026-06-20 | JBU282 | IAH → JFK | Jun 20, 03:22 UTC | Jun 20, 23:59 UTC | 20h 38m |
| 2026-06-19 | JBU281 | JFK → IAH | Jun 19, 21:49 UTC | Jun 20, 01:29 UTC | 3h 40m |
| 2026-06-19 | JBU281 | JFK → IAH | Jun 19, 21:45 UTC | Jun 20, 15:24 UTC | 17h 40m |
| 2026-06-19 | JBU1104 | - | Jun 19, 16:44 UTC | Jun 19, 20:14 UTC | 3h 30m |
| 2026-06-19 | JBU903 | - | Jun 19, 11:04 UTC | Jun 19, 14:29 UTC | 3h 25m |
| 2026-06-18 | JBU1901 | BUF → JFK | Jun 18, 13:20 UTC | Jun 18, 14:25 UTC | 1h 5m |
| 2026-06-18 | JBU1901 | BUF → JFK | Jun 18, 13:19 UTC | Jun 19, 11:34 UTC | 22h 16m |
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 N643JB page for operator, model, and routing details .