sensors Mode-S transponder
7C4923
ICAO 24-bit transponder address · allocated to Australia
Currently assigned to VH-OQD · AIRBUS A-380-800 · operated by QANTAS AIRWAYS LIMITED
- Hex
- 7C4923
- Octal
- 37044443
- Decimal
- 8,145,187
- Country
- AU
- Tail
- VH-OQD
- Type
- A388
- Flights observed
- 138
- Distinct callsigns
- 13
- Country
- AU
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address 7C4923 falls within the block assigned to Australia (AU) by ICAO Annex 10, Volume III. Every aircraft registered in Australia 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 |
|---|---|---|---|
| QFA1 | - | 30 | 2026-07-08 |
| QFA2 | - | 29 | 2026-07-10 |
| QFA12 | - | 13 | 2026-07-13 |
| QFA8 | - | 12 | 2026-07-07 |
| QFA7 | - | 11 | 2026-07-14 |
| QFA64 | - | 11 | 2026-07-11 |
| QFA11 | - | 10 | 2026-07-12 |
| QFA63 | - | 8 | 2026-07-11 |
| QFA81 | - | 5 | 2026-06-19 |
| QFA82 | Qantas | 4 | 2026-06-19 |
| QFA94 | - | 2 | 2026-06-14 |
| QFA93 | - | 1 | 2026-06-15 |
| MAINT | - | 1 | 2026-06-07 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | QFA7 | - | Jul 14, 02:50 UTC | Jul 14, 03:20 UTC | 30m |
| 2026-07-13 | QFA12 | - | Jul 13, 07:20 UTC | Jul 13, 21:20 UTC | 14h 0m |
| 2026-07-12 | QFA11 | SYD → LAX | Jul 12, 08:15 UTC | Jul 12, 21:20 UTC | 13h 5m |
| 2026-07-11 | QFA64 | - | Jul 11, 17:35 UTC | Jul 12, 04:35 UTC | 11h 0m |
| 2026-07-11 | QFA63 | - | Jul 11, 00:10 UTC | Jul 11, 14:45 UTC | 14h 35m |
| 2026-07-10 | QFA2 | - | Jul 10, 18:25 UTC | Jul 10, 19:05 UTC | 40m |
| 2026-07-10 | QFA2 | - | Jul 10, 12:05 UTC | Jul 10, 12:15 UTC | 10m |
| 2026-07-09 | QFA2 | - | Jul 9, 20:15 UTC | Jul 10, 08:35 UTC | 12h 20m |
| 2026-07-08 | QFA1 | - | Jul 8, 16:40 UTC | Jul 9, 05:40 UTC | 13h 0m |
| 2026-07-08 | QFA1 | - | Jul 8, 13:45 UTC | Jul 8, 13:55 UTC | 10m |
| 2026-07-08 | QFA1 | - | Jul 8, 05:50 UTC | Jul 8, 07:40 UTC | 1h 50m |
| 2026-07-07 | QFA8 | DFW → SYD | Jul 7, 05:10 UTC | Jul 7, 21:30 UTC | 16h 20m |
| 2026-07-06 | QFA7 | SYD → DFW | Jul 6, 03:05 UTC | Jul 6, 17:50 UTC | 14h 45m |
| 2026-07-05 | QFA2 | - | Jul 5, 13:10 UTC | Jul 5, 20:05 UTC | 6h 55m |
| 2026-07-04 | QFA2 | - | Jul 4, 20:25 UTC | Jul 5, 09:05 UTC | 12h 40m |
| 2026-07-03 | QFA1 | - | Jul 3, 18:40 UTC | Jul 4, 08:15 UTC | 13h 35m |
| 2026-07-03 | QFA1 | - | Jul 3, 07:50 UTC | Jul 3, 11:55 UTC | 4h 5m |
| 2026-07-03 | QFA64 | - | Jul 3, 02:40 UTC | Jul 3, 04:10 UTC | 1h 30m |
| 2026-07-02 | QFA64 | - | Jul 2, 17:15 UTC | Jul 2, 17:35 UTC | 20m |
| 2026-07-02 | QFA63 | SYD → JNB | Jul 2, 00:00 UTC | Jul 2, 14:45 UTC | 14h 45m |
| 2026-07-01 | QFA12 | - | Jul 1, 19:30 UTC | Jul 1, 21:05 UTC | 1h 35m |
| 2026-07-01 | QFA12 | - | Jul 1, 07:00 UTC | Jul 1, 07:25 UTC | 25m |
| 2026-06-30 | QFA11 | - | Jun 30, 08:35 UTC | Jun 30, 21:35 UTC | 13h 0m |
| 2026-06-30 | QFA64 | - | Jun 30, 02:40 UTC | Jun 30, 04:20 UTC | 1h 40m |
| 2026-06-29 | QFA64 | - | Jun 29, 17:05 UTC | Jun 29, 17:24 UTC | 20m |
| 2026-06-29 | QFA63 | SYD → JNB | Jun 29, 00:44 UTC | Jun 29, 14:14 UTC | 13h 30m |
| 2026-06-28 | QFA2 | - | Jun 28, 18:19 UTC | Jun 28, 19:04 UTC | 45m |
| 2026-06-27 | QFA2 | - | Jun 27, 20:44 UTC | Jun 28, 09:25 UTC | 12h 40m |
| 2026-06-26 | QFA1 | - | Jun 26, 15:54 UTC | Jun 27, 05:15 UTC | 13h 20m |
| 2026-06-26 | QFA1 | - | Jun 26, 13:04 UTC | Jun 26, 13:15 UTC | 10m |
| 2026-06-26 | QFA1 | - | Jun 26, 05:39 UTC | Jun 26, 06:15 UTC | 35m |
| 2026-06-25 | QFA2 | - | Jun 25, 18:24 UTC | Jun 25, 19:05 UTC | 40m |
| 2026-06-24 | QFA2 | - | Jun 24, 20:30 UTC | Jun 25, 09:25 UTC | 12h 55m |
| 2026-06-23 | QFA1 | - | Jun 23, 16:24 UTC | Jun 24, 05:44 UTC | 13h 20m |
| 2026-06-23 | QFA1 | - | Jun 23, 05:04 UTC | Jun 23, 09:14 UTC | 4h 10m |
| 2026-06-22 | QFA12 | - | Jun 22, 20:39 UTC | Jun 22, 22:30 UTC | 1h 50m |
| 2026-06-22 | QFA12 | - | Jun 22, 07:54 UTC | Jun 22, 08:15 UTC | 20m |
| 2026-06-21 | QFA11 | - | Jun 21, 08:10 UTC | Jun 21, 21:14 UTC | 13h 5m |
| 2026-06-20 | QFA64 | - | Jun 20, 17:04 UTC | Jun 21, 04:54 UTC | 11h 50m |
| 2026-06-20 | QFA63 | - | Jun 20, 00:04 UTC | Jun 20, 14:05 UTC | 14h 0m |
| 2026-06-19 | QFA82 | SIN → SYD | Jun 19, 19:25 UTC | Jun 19, 20:34 UTC | 1h 10m |
| 2026-06-19 | QFA81 | - | Jun 19, 00:55 UTC | Jun 19, 01:24 UTC | 30m |
| 2026-06-18 | QFA12 | - | Jun 18, 19:45 UTC | Jun 18, 21:20 UTC | 1h 35m |
| 2026-06-18 | QFA12 | - | Jun 18, 06:55 UTC | Jun 18, 07:20 UTC | 25m |
| 2026-06-15 | QFA93 | MEL → LAX | Jun 15, 00:45 UTC | Jun 15, 14:24 UTC | 13h 40m |
| 2026-06-14 | QFA94 | - | Jun 14, 18:35 UTC | Jun 14, 20:05 UTC | 1h 30m |
| 2026-06-14 | QFA94 | - | Jun 14, 05:20 UTC | Jun 14, 05:45 UTC | 25m |
| 2026-06-13 | QFA11 | - | Jun 13, 12:15 UTC | Jun 14, 01:15 UTC | 13h 0m |
| 2026-06-12 | QFA8 | DFW → SYD | Jun 12, 05:30 UTC | Jun 12, 21:30 UTC | 16h 0m |
| 2026-06-11 | QFA7 | SYD → DFW | Jun 11, 03:35 UTC | Jun 11, 18:20 UTC | 14h 45m |
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 VH-OQD page for operator, model, and routing details .