sensors Mode-S transponder
A4C2AD
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N4058J · AIRBUS A-321neo · operated by JETBLUE AIRWAYS CORPORATION
- Hex
- A4C2AD
- Octal
- 51141255
- Decimal
- 10,797,741
- Country
- US
- Tail
- N4058J
- Type
- A21N
- Flights observed
- 113
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address A4C2AD 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 |
|---|---|---|---|
| JBU33 | JetBlue Airways | 10 | 2026-05-25 |
| JBU2220 | JetBlue Airways | 10 | 2026-05-19 |
| JBU1408 | JetBlue Airways | 10 | 2026-05-17 |
| JBU1107 | JetBlue Airways | 10 | 2026-05-27 |
| JBU1407 | JetBlue Airways | 9 | 2026-05-20 |
| JBU34 | JetBlue Airways | 8 | 2026-05-20 |
| JBU31 | JetBlue Airways | 8 | 2026-05-23 |
| JBU1621 | JetBlue Airways | 8 | 2026-05-01 |
| JBU346 | JetBlue Airways | 6 | 2026-05-21 |
| JBU32 | JetBlue Airways | 6 | 2026-05-23 |
| JBU345 | JetBlue Airways | 4 | 2026-05-21 |
| JBU2260 | JetBlue Airways | 4 | 2026-05-24 |
| JBU7 | JetBlue Airways | 3 | 2026-05-26 |
| JBU331 | JetBlue Airways | 3 | 2026-05-21 |
| JBU2261 | JetBlue Airways | 3 | 2026-05-24 |
| JBU20 | JetBlue Airways | 3 | 2026-05-26 |
| JBU1620 | JetBlue Airways | 3 | 2026-04-30 |
| JBU734 | JetBlue Airways | 2 | 2026-05-08 |
| JBU933 | JetBlue Airways | 1 | 2026-04-18 |
| JBU332 | JetBlue Airways | 1 | 2026-05-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-27 | JBU1107 | JFK → LHR | May 27, 13:15 UTC | May 27, 19:55 UTC | 6h 40m |
| 2026-05-27 | JBU1107 | JFK → LHR | May 27, 13:13 UTC | May 27, 19:55 UTC | 6h 43m |
| 2026-05-26 | JBU20 | LHR → JFK | May 26, 11:09 UTC | May 26, 18:50 UTC | 7h 41m |
| 2026-05-26 | JBU7 | JFK → LHR | May 26, 01:30 UTC | May 26, 08:15 UTC | 6h 45m |
| 2026-05-25 | JBU33 | BOS → SFO | May 25, 01:55 UTC | May 25, 03:15 UTC | 1h 20m |
| 2026-05-25 | JBU33 | BOS → SFO | May 25, 01:49 UTC | May 25, 19:05 UTC | 17h 16m |
| 2026-05-24 | JBU2260 | MAD → BOS | May 24, 13:10 UTC | May 24, 20:45 UTC | 7h 35m |
| 2026-05-24 | JBU2261 | LGA → PBI | May 24, 02:50 UTC | May 24, 09:15 UTC | 6h 25m |
| 2026-05-23 | JBU32 | AMS → BOS | May 23, 09:54 UTC | May 24, 09:15 UTC | 23h 21m |
| 2026-05-23 | JBU31 | BOS → AMS | May 23, 01:30 UTC | May 23, 07:35 UTC | 6h 5m |
| 2026-05-23 | JBU31 | BOS → AMS | May 23, 01:28 UTC | May 23, 17:35 UTC | 16h 7m |
| 2026-05-21 | JBU331 | BDL → MCO | May 21, 23:20 UTC | May 22, 00:30 UTC | 1h 10m |
| 2026-05-21 | JBU331 | BDL → MCO | May 21, 23:17 UTC | May 22, 16:40 UTC | 17h 24m |
| 2026-05-21 | JBU346 | SRQ → JFK | May 21, 11:15 UTC | May 21, 19:35 UTC | 8h 20m |
| 2026-05-21 | JBU345 | JFK → SRQ | May 21, 00:50 UTC | May 21, 23:15 UTC | 22h 26m |
| 2026-05-20 | JBU34 | SFO → BOS | May 20, 11:01 UTC | May 21, 08:00 UTC | 21h 0m |
| 2026-05-20 | JBU1407 | JFK → CDG | May 20, 01:40 UTC | May 21, 01:15 UTC | 23h 36m |
| 2026-05-20 | JBU1407 | JFK → CDG | May 20, 01:45 UTC | May 20, 08:45 UTC | 7h 1m |
| 2026-05-19 | JBU2220 | LHR → JFK | May 19, 07:35 UTC | May 19, 14:55 UTC | 7h 20m |
| 2026-05-18 | JBU1107 | JFK → LHR | May 18, 13:10 UTC | May 18, 19:45 UTC | 6h 34m |
| 2026-05-17 | JBU1408 | MIA → EWR | May 17, 10:45 UTC | May 17, 18:45 UTC | 8h 0m |
| 2026-05-17 | JBU1408 | MIA → EWR | May 17, 10:43 UTC | May 17, 18:45 UTC | 8h 3m |
| 2026-05-17 | JBU33 | BOS → SFO | May 17, 01:35 UTC | May 17, 08:00 UTC | 6h 25m |
| 2026-05-16 | JBU332 | LGA → BOS | May 16, 08:31 UTC | May 17, 07:15 UTC | 22h 45m |
| 2026-05-15 | JBU331 | BDL → MCO | May 15, 22:32 UTC | May 16, 20:35 UTC | 22h 4m |
| 2026-05-15 | JBU34 | SFO → BOS | May 15, 09:26 UTC | May 16, 09:16 UTC | 23h 50m |
| 2026-05-15 | JBU34 | SFO → BOS | May 15, 09:26 UTC | May 16, 09:16 UTC | 23h 50m |
| 2026-05-14 | JBU1407 | JFK → CDG | May 14, 23:54 UTC | May 15, 23:10 UTC | 23h 16m |
| 2026-05-14 | JBU2220 | LHR → JFK | May 14, 07:20 UTC | May 14, 08:40 UTC | 1h 20m |
| 2026-05-14 | JBU2220 | LHR → JFK | May 14, 07:20 UTC | May 15, 06:40 UTC | 23h 21m |
| 2026-05-13 | JBU1107 | JFK → LHR | May 13, 15:25 UTC | May 13, 22:20 UTC | 6h 55m |
| 2026-05-12 | JBU2220 | LHR → JFK | May 12, 07:25 UTC | May 12, 08:50 UTC | 1h 25m |
| 2026-05-12 | JBU2220 | LHR → JFK | May 12, 07:22 UTC | May 12, 15:01 UTC | 7h 39m |
| 2026-05-11 | JBU1107 | JFK → LHR | May 11, 13:10 UTC | May 11, 19:25 UTC | 6h 15m |
| 2026-05-10 | JBU1408 | MIA → EWR | May 10, 11:15 UTC | May 10, 19:05 UTC | 7h 50m |
| 2026-05-10 | JBU1408 | MIA → EWR | May 10, 11:13 UTC | May 10, 19:05 UTC | 7h 52m |
| 2026-05-10 | JBU33 | BOS → SFO | May 10, 02:30 UTC | May 10, 09:05 UTC | 6h 35m |
| 2026-05-08 | JBU734 | SFO → BOS | May 8, 21:50 UTC | May 9, 02:45 UTC | 4h 55m |
| 2026-05-08 | JBU1833 | BOS → SFO | May 8, 13:25 UTC | May 8, 19:35 UTC | 6h 10m |
| 2026-05-06 | JBU346 | SRQ → JFK | May 6, 11:42 UTC | May 7, 09:00 UTC | 21h 18m |
| 2026-05-06 | JBU346 | SRQ → JFK | May 6, 11:45 UTC | May 6, 20:15 UTC | 8h 29m |
| 2026-05-06 | JBU345 | JFK → SRQ | May 6, 00:20 UTC | May 6, 07:15 UTC | 6h 55m |
| 2026-05-05 | JBU31 | BOS → AMS | May 5, 00:10 UTC | May 5, 01:15 UTC | 1h 5m |
| 2026-05-05 | JBU31 | BOS → AMS | May 5, 00:10 UTC | May 5, 17:05 UTC | 16h 56m |
| 2026-05-04 | JBU2260 | MAD → BOS | May 4, 12:15 UTC | May 4, 19:55 UTC | 7h 41m |
| 2026-05-04 | JBU2261 | LGA → PBI | May 4, 02:45 UTC | May 4, 09:10 UTC | 6h 25m |
| 2026-05-03 | JBU34 | SFO → BOS | May 3, 09:25 UTC | May 3, 11:10 UTC | 1h 45m |
| 2026-05-03 | JBU34 | SFO → BOS | May 3, 09:24 UTC | May 4, 09:15 UTC | 23h 51m |
| 2026-05-03 | JBU34 | SFO → BOS | May 3, 09:24 UTC | May 4, 09:15 UTC | 23h 51m |
| 2026-05-03 | JBU1407 | JFK → CDG | May 3, 00:15 UTC | May 3, 07:15 UTC | 6h 59m |
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 N4058J page for operator, model, and routing details .