sensors Mode-S transponder
4401A3
ICAO 24-bit transponder address · allocated to Austria
Currently assigned to OE-LDR · BOMBARDIER BD-700 Global 6000/6500
- Hex
- 4401A3
- Octal
- 21000643
- Decimal
- 4,456,867
- Country
- AT
- Tail
- OE-LDR
- Type
- GLEX
- Flights observed
- 48
- Distinct callsigns
- 1
- Country
- AT
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 4401A3 falls within the block assigned to Austria (AT) by ICAO Annex 10, Volume III. Every aircraft registered in Austria 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| AOJ1F | - | 48 | 2026-07-21 |
Recent flights last 48
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-21 | AOJ1F | - | Jul 21, 14:20 UTC | Jul 21, 15:55 UTC | 1h 35m |
| 2026-07-21 | AOJ1F | - | Jul 21, 12:45 UTC | Jul 21, 13:30 UTC | 45m |
| 2026-07-19 | AOJ1F | - | Jul 19, 16:55 UTC | Jul 19, 18:15 UTC | 1h 20m |
| 2026-07-17 | AOJ1F | - | Jul 17, 07:00 UTC | Jul 17, 08:35 UTC | 1h 35m |
| 2026-07-11 | AOJ1F | - | Jul 11, 17:20 UTC | Jul 11, 18:15 UTC | 55m |
| 2026-07-08 | AOJ1F | - | Jul 8, 09:15 UTC | Jul 8, 10:05 UTC | 50m |
| 2026-07-05 | AOJ1F | OXF → OLB | Jul 5, 17:35 UTC | Jul 5, 19:35 UTC | 2h 0m |
| 2026-06-30 | AOJ1F | EDI → OXF | Jun 30, 21:15 UTC | Jun 30, 22:00 UTC | 45m |
| 2026-06-30 | AOJ1F | - | Jun 30, 16:30 UTC | Jun 30, 17:15 UTC | 45m |
| 2026-06-28 | AOJ1F | - | Jun 28, 17:34 UTC | Jun 28, 19:25 UTC | 1h 50m |
| 2026-06-26 | AOJ1F | - | Jun 26, 09:30 UTC | Jun 26, 09:45 UTC | 15m |
| 2026-06-24 | AOJ1F | - | Jun 24, 15:09 UTC | Jun 24, 16:19 UTC | 1h 10m |
| 2026-06-24 | AOJ1F | - | Jun 24, 13:24 UTC | Jun 24, 14:20 UTC | 55m |
| 2026-06-21 | AOJ1F | - | Jun 21, 15:09 UTC | Jun 21, 16:10 UTC | 1h 0m |
| 2026-06-21 | AOJ1F | - | Jun 21, 12:35 UTC | Jun 21, 13:20 UTC | 45m |
| 2026-06-18 | AOJ1F | - | Jun 18, 17:21 UTC | Jun 18, 19:10 UTC | 1h 49m |
| 2026-06-16 | AOJ1F | - | Jun 16, 08:25 UTC | Jun 16, 10:15 UTC | 1h 50m |
| 2026-06-14 | AOJ1F | - | Jun 14, 17:40 UTC | Jun 14, 18:30 UTC | 50m |
| 2026-06-12 | AOJ1F | - | Jun 12, 09:20 UTC | Jun 12, 10:00 UTC | 40m |
| 2026-06-10 | AOJ1F | - | Jun 10, 17:45 UTC | Jun 10, 19:15 UTC | 1h 30m |
| 2026-06-10 | AOJ1F | - | Jun 10, 12:45 UTC | Jun 10, 13:40 UTC | 55m |
| 2026-06-09 | AOJ1F | NCE → OXF | Jun 9, 08:35 UTC | Jun 9, 10:10 UTC | 1h 35m |
| 2026-06-03 | AOJ1F | ZRH → NCE | Jun 3, 07:45 UTC | Jun 3, 08:35 UTC | 50m |
| 2026-06-02 | AOJ1F | NCE → ZRH | Jun 2, 14:40 UTC | Jun 2, 15:35 UTC | 55m |
| 2026-05-31 | AOJ1F | - | May 31, 14:30 UTC | May 31, 15:55 UTC | 1h 25m |
| 2026-05-31 | AOJ1F | - | May 31, 11:55 UTC | May 31, 12:10 UTC | 15m |
| 2026-05-29 | AOJ1F | - | May 29, 16:05 UTC | May 29, 16:15 UTC | 10m |
| 2026-05-28 | AOJ1F | - | May 28, 17:10 UTC | May 28, 19:35 UTC | 2h 25m |
| 2026-05-27 | AOJ1F | - | May 27, 07:00 UTC | May 27, 08:30 UTC | 1h 30m |
| 2026-05-25 | AOJ1F | - | May 25, 04:15 UTC | May 25, 06:45 UTC | 2h 30m |
| 2026-05-24 | AOJ1F | - | May 24, 23:45 UTC | May 24, 23:46 UTC | 1m |
| 2026-05-20 | AOJ1F | - | May 20, 20:00 UTC | May 21, 00:30 UTC | 4h 30m |
| 2026-05-14 | AOJ1F | - | May 14, 20:55 UTC | May 14, 23:00 UTC | 2h 5m |
| 2026-05-13 | AOJ1F | NCE → SEA | May 13, 18:35 UTC | May 14, 05:10 UTC | 10h 35m |
| 2026-05-12 | AOJ1F | - | May 12, 20:40 UTC | May 12, 21:30 UTC | 50m |
| 2026-05-12 | AOJ1F | - | May 12, 15:30 UTC | May 12, 16:05 UTC | 35m |
| 2026-05-07 | AOJ1F | - | May 7, 15:30 UTC | May 7, 17:05 UTC | 1h 35m |
| 2026-05-05 | AOJ1F | - | May 5, 15:25 UTC | May 5, 17:00 UTC | 1h 35m |
| 2026-05-03 | AOJ1F | - | May 3, 23:30 UTC | May 4, 07:45 UTC | 8h 15m |
| 2026-04-30 | AOJ1F | TEB → OPF | Apr 30, 13:40 UTC | Apr 30, 16:05 UTC | 2h 25m |
| 2026-04-27 | AOJ1F | - | Apr 27, 15:30 UTC | Apr 27, 22:15 UTC | 6h 45m |
| 2026-04-27 | AOJ1F | NCE → BHX | Apr 27, 08:25 UTC | Apr 27, 10:00 UTC | 1h 35m |
| 2026-04-26 | AOJ1F | - | Apr 26, 16:15 UTC | Apr 26, 17:00 UTC | 45m |
| 2026-04-23 | AOJ1F | - | Apr 23, 14:10 UTC | Apr 23, 15:45 UTC | 1h 35m |
| 2026-04-21 | AOJ1F | - | Apr 21, 12:15 UTC | Apr 21, 13:25 UTC | 1h 10m |
| 2026-04-21 | AOJ1F | NCE → HAJ | Apr 21, 07:10 UTC | Apr 21, 08:45 UTC | 1h 35m |
| 2026-04-18 | AOJ1F | - | Apr 18, 15:40 UTC | Apr 18, 16:30 UTC | 50m |
| 2026-04-16 | AOJ1F | - | Apr 16, 18:00 UTC | Apr 16, 18:15 UTC | 15m |
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 OE-LDR page for operator, model, and routing details .