sensors Mode-S transponder
504E7D
ICAO 24-bit transponder address · allocated to Moldova
Currently assigned to ER-MDR · BOEING 747-400
- Hex
- 504E7D
- Octal
- 24047175
- Decimal
- 5,262,973
- Country
- MD
- Tail
- ER-MDR
- Type
- B744
- Flights observed
- 49
- Distinct callsigns
- 13
- Country
- MD
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 504E7D falls within the block assigned to Moldova (MD) by ICAO Annex 10, Volume III. Every aircraft registered in Moldova 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 13 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| PXA201 | - | 12 | 2026-07-07 |
| PXA602 | - | 7 | 2026-07-16 |
| PXA402 | - | 5 | 2026-07-10 |
| PXA202 | - | 5 | 2026-07-07 |
| PXA403 | - | 4 | 2026-07-11 |
| PXA206 | - | 4 | 2026-04-17 |
| PXA601 | - | 3 | 2026-07-02 |
| PXA451 | - | 2 | 2026-04-19 |
| PXA432 | - | 2 | 2026-04-13 |
| PXA207 | - | 2 | 2026-04-18 |
| PXA501 | - | 1 | 2026-06-26 |
| PXA452 | - | 1 | 2026-06-03 |
| PXA401 | - | 1 | 2026-06-22 |
Recent flights last 49
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-16 | PXA602 | - | Jul 16, 03:40 UTC | Jul 16, 19:20 UTC | 15h 40m |
| 2026-07-15 | PXA602 | - | Jul 15, 04:05 UTC | Jul 15, 18:15 UTC | 14h 10m |
| 2026-07-11 | PXA403 | - | Jul 11, 06:15 UTC | Jul 11, 23:25 UTC | 17h 10m |
| 2026-07-10 | PXA403 | - | Jul 10, 22:45 UTC | Jul 10, 23:05 UTC | 20m |
| 2026-07-10 | PXA402 | - | Jul 10, 06:30 UTC | Jul 10, 06:45 UTC | 15m |
| 2026-07-09 | PXA403 | - | Jul 9, 14:35 UTC | Jul 9, 15:30 UTC | 55m |
| 2026-07-08 | PXA402 | - | Jul 8, 23:55 UTC | Jul 9, 00:05 UTC | 10m |
| 2026-07-08 | PXA402 | AUH → AUH | Jul 8, 19:10 UTC | Jul 8, 19:25 UTC | 15m |
| 2026-07-07 | PXA202 | - | Jul 7, 19:45 UTC | Jul 8, 00:15 UTC | 4h 30m |
| 2026-07-07 | PXA201 | - | Jul 7, 07:35 UTC | Jul 7, 12:15 UTC | 4h 40m |
| 2026-07-06 | PXA201 | - | Jul 6, 02:30 UTC | Jul 6, 15:35 UTC | 13h 5m |
| 2026-07-06 | PXA201 | - | Jul 6, 00:55 UTC | Jul 6, 02:25 UTC | 1h 30m |
| 2026-07-04 | PXA602 | - | Jul 4, 12:15 UTC | Jul 5, 06:00 UTC | 17h 45m |
| 2026-07-04 | PXA602 | - | Jul 4, 10:20 UTC | Jul 5, 06:00 UTC | 19h 40m |
| 2026-07-03 | PXA201 | - | Jul 3, 14:50 UTC | Jul 4, 05:50 UTC | 15h 0m |
| 2026-07-02 | PXA601 | - | Jul 2, 10:40 UTC | Jul 3, 05:10 UTC | 18h 30m |
| 2026-07-01 | PXA202 | - | Jul 1, 21:35 UTC | Jul 2, 01:30 UTC | 3h 55m |
| 2026-07-01 | PXA201 | - | Jul 1, 12:05 UTC | Jul 1, 16:40 UTC | 4h 35m |
| 2026-07-01 | PXA201 | - | Jul 1, 03:20 UTC | Jul 1, 03:40 UTC | 20m |
| 2026-06-30 | PXA602 | - | Jun 30, 03:25 UTC | Jun 30, 22:30 UTC | 19h 5m |
| 2026-06-28 | PXA601 | - | Jun 28, 16:19 UTC | Jun 29, 10:10 UTC | 17h 50m |
| 2026-06-28 | PXA202 | - | Jun 28, 08:05 UTC | Jun 28, 12:35 UTC | 4h 30m |
| 2026-06-27 | PXA201 | - | Jun 27, 19:49 UTC | Jun 28, 00:20 UTC | 4h 30m |
| 2026-06-26 | PXA501 | - | Jun 26, 19:24 UTC | Jun 27, 14:39 UTC | 19h 15m |
| 2026-06-25 | PXA201 | - | Jun 25, 21:10 UTC | Jun 26, 11:40 UTC | 14h 30m |
| 2026-06-24 | PXA201 | - | Jun 24, 22:39 UTC | Jun 25, 15:24 UTC | 16h 45m |
| 2026-06-23 | PXA402 | - | Jun 23, 04:35 UTC | Jun 23, 21:39 UTC | 17h 5m |
| 2026-06-23 | PXA402 | - | Jun 23, 00:50 UTC | Jun 23, 01:10 UTC | 20m |
| 2026-06-22 | PXA401 | - | Jun 22, 20:55 UTC | Jun 22, 21:14 UTC | 20m |
| 2026-06-19 | PXA202 | - | Jun 19, 02:04 UTC | Jun 19, 06:39 UTC | 4h 35m |
| 2026-06-18 | PXA201 | - | Jun 18, 20:05 UTC | Jun 18, 20:15 UTC | 10m |
| 2026-06-18 | PXA201 | - | Jun 18, 19:20 UTC | Jun 18, 19:30 UTC | 10m |
| 2026-06-17 | PXA403 | - | Jun 17, 22:05 UTC | Jun 18, 19:30 UTC | 21h 25m |
| 2026-06-16 | PXA202 | - | Jun 16, 08:10 UTC | Jun 16, 19:50 UTC | 11h 41m |
| 2026-06-13 | PXA201 | - | Jun 13, 03:55 UTC | Jun 13, 17:25 UTC | 13h 29m |
| 2026-06-03 | PXA452 | - | Jun 3, 18:55 UTC | Jun 4, 00:30 UTC | 5h 35m |
| 2026-04-19 | PXA451 | - | Apr 19, 22:50 UTC | Apr 19, 23:00 UTC | 10m |
| 2026-04-19 | PXA451 | - | Apr 19, 15:35 UTC | Apr 19, 22:05 UTC | 6h 30m |
| 2026-04-18 | PXA207 | - | Apr 18, 07:25 UTC | Apr 18, 09:20 UTC | 1h 55m |
| 2026-04-18 | PXA207 | - | Apr 18, 06:50 UTC | Apr 18, 13:40 UTC | 6h 50m |
| 2026-04-17 | PXA206 | - | Apr 17, 13:20 UTC | Apr 17, 14:10 UTC | 50m |
| 2026-04-17 | PXA206 | - | Apr 17, 11:35 UTC | Apr 17, 13:15 UTC | 1h 40m |
| 2026-04-17 | PXA206 | - | Apr 17, 09:55 UTC | Apr 17, 11:00 UTC | 1h 5m |
| 2026-04-17 | PXA206 | - | Apr 17, 06:35 UTC | Apr 17, 07:15 UTC | 40m |
| 2026-04-15 | PXA602 | - | Apr 15, 22:05 UTC | Apr 15, 22:30 UTC | 25m |
| 2026-04-15 | PXA601 | - | Apr 15, 03:30 UTC | Apr 15, 03:50 UTC | 20m |
| 2026-04-14 | PXA602 | - | Apr 14, 22:10 UTC | Apr 14, 22:40 UTC | 30m |
| 2026-04-13 | PXA432 | - | Apr 13, 16:15 UTC | Apr 13, 16:30 UTC | 15m |
| 2026-04-13 | PXA432 | - | Apr 13, 16:05 UTC | Apr 13, 16:15 UTC | 10m |
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 ER-MDR page for operator, model, and routing details .