sensors Mode-S transponder
A874E1
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N644JB · AIRBUS A-320 · operated by JETBLUE AIRWAYS CORP
- Hex
- A874E1
- Octal
- 52072341
- Decimal
- 11,039,969
- Country
- US
- Tail
- N644JB
- Type
- A320
- Flights observed
- 95
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 37m ago
Current position
Country allocation
The ICAO 24-bit address A874E1 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 |
|---|---|---|---|
| JBU1833 | JetBlue Airways | 4 | 2026-04-18 |
| JBU1457 | JetBlue Airways | 4 | 2026-05-08 |
| JBU87 | JetBlue Airways | 3 | 2026-06-01 |
| JBU499 | JetBlue Airways | 3 | 2026-05-25 |
| JBU9 | JetBlue Airways | 2 | 2026-05-09 |
| JBU88 | JetBlue Airways | 2 | 2026-06-01 |
| JBU768 | JetBlue Airways | 2 | 2026-05-07 |
| JBU688 | JetBlue Airways | 2 | 2026-04-17 |
| JBU687 | JetBlue Airways | 2 | 2026-04-16 |
| JBU488 | - | 2 | 2026-04-16 |
| JBU2795 | JetBlue Airways | 2 | 2026-05-24 |
| JBU2049 | JetBlue Airways | 2 | 2026-06-02 |
| JBU1976 | JetBlue Airways | 2 | 2026-04-16 |
| JBU1925 | - | 2 | 2026-04-17 |
| JBU1868 | JetBlue Airways | 2 | 2026-05-10 |
| JBU1799 | JetBlue Airways | 2 | 2026-04-19 |
| JBU1797 | JetBlue Airways | 2 | 2026-05-27 |
| JBU1719 | JetBlue Airways | 2 | 2026-05-23 |
| JBU1718 | JetBlue Airways | 2 | 2026-05-23 |
| JBU158 | JetBlue Airways | 2 | 2026-05-08 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | JBU2049 | BUF → RSW | Jun 2, 15:35 UTC | Jun 2, 17:55 UTC | 2h 20m |
| 2026-06-02 | JBU2049 | BUF → RSW | Jun 2, 15:33 UTC | Jun 2, 20:15 UTC | 4h 42m |
| 2026-06-01 | JBU88 | FLL → ALB | Jun 1, 17:55 UTC | Jun 1, 18:15 UTC | 20m |
| 2026-06-01 | JBU87 | ALB → FLL | Jun 1, 14:10 UTC | Jun 1, 16:50 UTC | 2h 40m |
| 2026-06-01 | JBU87 | ALB → FLL | Jun 1, 14:08 UTC | Jun 2, 01:15 UTC | 11h 8m |
| 2026-06-01 | JBU2465 | BUF → FLL | Jun 1, 10:05 UTC | Jun 1, 12:30 UTC | 2h 25m |
| 2026-05-31 | JBU2466 | FLL → BUF | May 31, 22:20 UTC | Jun 1, 00:55 UTC | 2h 35m |
| 2026-05-31 | JBU88 | FLL → ALB | May 31, 18:15 UTC | May 31, 20:50 UTC | 2h 35m |
| 2026-05-31 | JBU87 | ALB → FLL | May 31, 14:15 UTC | May 31, 17:05 UTC | 2h 50m |
| 2026-05-31 | JBU1906 | TPA → FLL | May 31, 12:05 UTC | May 31, 12:50 UTC | 45m |
| 2026-05-30 | JBU1380 | FLL → GUA | May 30, 15:11 UTC | May 31, 14:15 UTC | 23h 5m |
| 2026-05-29 | JBU2940 | SJU → STX | May 29, 19:39 UTC | May 30, 18:15 UTC | 22h 37m |
| 2026-05-29 | JBU1553 | FLL → SJU | May 29, 15:25 UTC | May 30, 13:00 UTC | 21h 35m |
| 2026-05-29 | JBU959 | BDL → FLL | May 29, 11:09 UTC | May 30, 10:15 UTC | 23h 6m |
| 2026-05-28 | JBU304 | SJU → JFK | May 28, 22:28 UTC | May 29, 22:15 UTC | 23h 47m |
| 2026-05-28 | JBU2631 | SJU → PUJ | May 28, 19:04 UTC | May 29, 17:35 UTC | 22h 32m |
| 2026-05-28 | JBU1553 | FLL → SJU | May 28, 15:39 UTC | May 29, 13:50 UTC | 22h 11m |
| 2026-05-28 | JBU375 | PVD → MCO | May 28, 11:27 UTC | May 29, 04:05 UTC | 16h 38m |
| 2026-05-27 | JBU2760 | SXM → FLL | May 27, 19:20 UTC | May 28, 16:10 UTC | 20h 50m |
| 2026-05-27 | JBU1797 | ATL → FLL | May 27, 11:57 UTC | May 28, 03:15 UTC | 15h 18m |
| 2026-05-27 | JBU1797 | ATL → FLL | May 27, 12:00 UTC | May 27, 13:25 UTC | 1h 25m |
| 2026-05-26 | JBU1375 | FLL → KIN | May 26, 13:10 UTC | May 26, 13:40 UTC | 30m |
| 2026-05-26 | JBU1375 | FLL → KIN | May 26, 13:08 UTC | May 27, 12:15 UTC | 23h 8m |
| 2026-05-25 | JBU1171 | LGA → FLL | May 25, 22:40 UTC | May 26, 01:10 UTC | 2h 30m |
| 2026-05-25 | JBU598 | MCO → LGA | May 25, 19:10 UTC | May 25, 21:35 UTC | 2h 25m |
| 2026-05-25 | JBU499 | LGA → MCO | May 25, 14:25 UTC | May 25, 16:35 UTC | 2h 10m |
| 2026-05-25 | JBU172 | FLL → LGA | May 25, 10:40 UTC | May 25, 13:05 UTC | 2h 25m |
| 2026-05-24 | JBU2795 | FLL → CUN | May 24, 15:15 UTC | May 24, 16:45 UTC | 1h 30m |
| 2026-05-24 | JBU2795 | FLL → CUN | May 24, 15:14 UTC | May 25, 14:15 UTC | 23h 2m |
| 2026-05-24 | JBU27 | BOS → BWI | May 24, 10:10 UTC | May 24, 12:50 UTC | 2h 40m |
| 2026-05-23 | JBU526 | MCO → EWR | May 23, 23:05 UTC | May 24, 02:35 UTC | 3h 30m |
| 2026-05-23 | JBU1719 | JFK → ATL | May 23, 20:40 UTC | May 23, 21:05 UTC | 25m |
| 2026-05-23 | JBU1719 | JFK → ATL | May 23, 17:55 UTC | May 23, 18:30 UTC | 36m |
| 2026-05-23 | JBU1718 | JFK → BOS | May 23, 15:40 UTC | May 23, 16:15 UTC | 35m |
| 2026-05-23 | JBU1718 | JFK → BOS | May 23, 13:05 UTC | May 23, 13:15 UTC | 10m |
| 2026-05-23 | JBU1233 | MCO → SJU | May 23, 11:30 UTC | May 23, 11:50 UTC | 20m |
| 2026-05-23 | JBU1233 | MCO → SJU | May 23, 09:25 UTC | May 23, 10:00 UTC | 35m |
| 2026-05-22 | JBU251 | BOS → MCO | May 22, 02:02 UTC | May 22, 09:05 UTC | 7h 4m |
| 2026-05-21 | JBU1366 | CUN → TPA | May 21, 18:22 UTC | May 22, 09:05 UTC | 14h 44m |
| 2026-05-20 | JBU1640 | SVD → JFK | May 20, 22:40 UTC | May 21, 22:15 UTC | 23h 36m |
| 2026-05-20 | JBU1639 | JFK → SVD | May 20, 17:05 UTC | May 21, 00:00 UTC | 6h 55m |
| 2026-05-17 | JBU8584 | MLB → BOS | May 17, 17:20 UTC | May 17, 19:45 UTC | 2h 25m |
| 2026-05-10 | JBU8615 | JFK → MCN | May 10, 21:51 UTC | May 11, 00:34 UTC | 2h 44m |
| 2026-05-10 | JBU1868 | PBI → HPN | May 10, 15:24 UTC | May 10, 17:20 UTC | 1h 55m |
| 2026-05-10 | JBU1868 | PBI → HPN | May 10, 15:22 UTC | May 11, 00:34 UTC | 9h 13m |
| 2026-05-10 | JBU1867 | HPN → PBI | May 10, 11:50 UTC | May 10, 14:04 UTC | 2h 15m |
| 2026-05-09 | JBU9 | JFK → FLL | May 9, 18:00 UTC | May 9, 18:35 UTC | 35m |
| 2026-05-09 | JBU9 | JFK → FLL | May 9, 17:58 UTC | May 10, 16:14 UTC | 22h 17m |
| 2026-05-08 | JBU158 | AUA → JFK | May 8, 21:37 UTC | May 9, 18:35 UTC | 20h 58m |
| 2026-05-08 | JBU1457 | JFK → AUA | May 8, 15:45 UTC | May 8, 19:35 UTC | 3h 50m |
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 N644JB page for operator, model, and routing details .