sensors Mode-S transponder
06A121
ICAO 24-bit transponder address · allocated to Qatar
Currently assigned to A7-ANE · AIRBUS A-350-1000
- Hex
- 06A121
- Octal
- 01520441
- Decimal
- 434,465
- Country
- QA
- Tail
- A7-ANE
- Type
- A35K
- Flights observed
- 85
- Distinct callsigns
- 20
- Country
- QA
- Last broadcast
- 5h ago
Last known position
Country allocation
The ICAO 24-bit address 06A121 falls within the block assigned to Qatar (QA) by ICAO Annex 10, Volume III. Every aircraft registered in Qatar 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 |
|---|---|---|---|
| QTR20V | Qatar Airways | 10 | 2026-05-17 |
| QTR20R | Qatar Airways | 7 | 2026-05-28 |
| QTR98P | Qatar Airways | 6 | 2026-05-03 |
| QTR773 | - | 5 | 2026-04-14 |
| QTR774 | Qatar Airways | 4 | 2026-04-15 |
| QTR40X | - | 4 | 2026-05-18 |
| QTR15Q | Qatar Airways | 4 | 2026-05-09 |
| QTR21L | Qatar Airways | 3 | 2026-05-16 |
| QTR17E | - | 3 | 2026-05-29 |
| QTR87Q | Qatar Airways | 2 | 2026-05-18 |
| QTR818 | Qatar Airways | 2 | 2026-05-24 |
| QTR7P | Qatar Airways | 2 | 2026-05-01 |
| QTR706 | Qatar Airways | 2 | 2026-05-10 |
| QTR6W | Qatar Airways | 2 | 2026-04-24 |
| QTR572 | Qatar Airways | 2 | 2026-05-06 |
| QTR52N | Qatar Airways | 2 | 2026-04-28 |
| QTR27R | - | 2 | 2026-05-19 |
| QTR18F | Qatar Airways | 2 | 2026-05-22 |
| QTR9W | Qatar Airways | 1 | 2026-04-20 |
| QTR93W | Qatar Airways | 1 | 2026-05-29 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | QTR65B | DFW → DOH | May 29, 22:55 UTC | May 29, 23:35 UTC | 40m |
| 2026-05-29 | QTR93W | TRV → DOH | May 29, 19:50 UTC | May 29, 20:35 UTC | 45m |
| 2026-05-29 | QTR17E | JFK → DOH | May 29, 02:40 UTC | May 29, 14:45 UTC | 12h 5m |
| 2026-05-28 | QTR20R | DOH → JFK | May 28, 10:45 UTC | May 28, 21:15 UTC | 10h 30m |
| 2026-05-27 | QTR20R | DOH → JFK | May 27, 22:40 UTC | May 28, 21:15 UTC | 22h 35m |
| 2026-05-27 | QTR20R | DOH → JFK | May 27, 19:25 UTC | May 28, 15:20 UTC | 19h 55m |
| 2026-05-27 | QTR16M | AMS → DOH | May 27, 12:30 UTC | May 28, 12:15 UTC | 23h 45m |
| 2026-05-27 | QTR74V | DOH → ATL | May 27, 03:04 UTC | May 27, 08:10 UTC | 5h 5m |
| 2026-05-26 | QTR17E | - | May 26, 02:35 UTC | May 26, 14:55 UTC | 12h 20m |
| 2026-05-25 | QTR20R | DOH → JFK | May 25, 10:45 UTC | May 25, 21:49 UTC | 11h 4m |
| 2026-05-24 | QTR20R | DOH → JFK | May 24, 23:15 UTC | May 25, 21:49 UTC | 22h 35m |
| 2026-05-24 | QTR20R | DOH → JFK | May 24, 20:20 UTC | May 25, 15:35 UTC | 19h 15m |
| 2026-05-24 | QTR20R | DOH → JFK | May 24, 20:05 UTC | May 25, 15:35 UTC | 19h 30m |
| 2026-05-24 | QTR815 | HKG → DOH | May 24, 18:15 UTC | May 24, 18:30 UTC | 15m |
| 2026-05-24 | QTR818 | DOH → HKG | May 24, 07:25 UTC | May 24, 07:55 UTC | 30m |
| 2026-05-24 | QTR818 | DOH → HKG | May 24, 02:10 UTC | May 24, 05:25 UTC | 3h 15m |
| 2026-05-23 | QTR65R | SEA → DOH | May 23, 03:35 UTC | May 23, 15:50 UTC | 12h 15m |
| 2026-05-22 | QTR18F | BUD → DOH | May 22, 20:00 UTC | May 22, 22:00 UTC | 2h 0m |
| 2026-05-22 | QTR18F | BUD → DOH | May 22, 11:20 UTC | May 22, 19:55 UTC | 8h 36m |
| 2026-05-19 | QTR27R | - | May 19, 11:00 UTC | May 19, 21:45 UTC | 10h 45m |
| 2026-05-18 | QTR40X | - | May 18, 20:55 UTC | May 19, 07:00 UTC | 10h 5m |
| 2026-05-18 | QTR87Q | ORD → DOH | May 18, 01:40 UTC | May 18, 14:20 UTC | 12h 40m |
| 2026-05-17 | QTR20V | DOH → ORD | May 17, 09:45 UTC | May 17, 22:01 UTC | 12h 15m |
| 2026-05-16 | QTR21L | LAX → LGG | May 16, 15:31 UTC | May 16, 21:10 UTC | 5h 40m |
| 2026-05-15 | QTR27R | - | May 15, 10:55 UTC | May 15, 21:55 UTC | 10h 59m |
| 2026-05-14 | QTR40X | - | May 14, 20:40 UTC | May 15, 06:50 UTC | 10h 10m |
| 2026-05-14 | QTR40X | - | May 14, 00:20 UTC | May 14, 21:30 UTC | 21h 10m |
| 2026-05-13 | QTR780 | GRU → DOH | May 13, 23:35 UTC | May 14, 21:30 UTC | 21h 55m |
| 2026-05-13 | QTR779 | DOH → GRU | May 13, 14:15 UTC | May 13, 15:50 UTC | 1h 35m |
| 2026-05-12 | QTR87Q | ORD → DOH | May 12, 02:55 UTC | May 12, 11:20 UTC | 8h 25m |
| 2026-05-10 | QTR706 | JFK → DOH | May 10, 06:40 UTC | May 10, 18:49 UTC | 12h 10m |
| 2026-05-09 | QTR15Q | DOH → JFK | May 9, 12:35 UTC | May 10, 02:20 UTC | 13h 45m |
| 2026-05-08 | QTR706 | JFK → DOH | May 8, 09:39 UTC | May 8, 19:30 UTC | 9h 50m |
| 2026-05-07 | QTR15Q | DOH → JFK | May 7, 21:50 UTC | May 8, 05:24 UTC | 7h 35m |
| 2026-05-07 | QTR15Q | DOH → JFK | May 7, 15:25 UTC | May 7, 20:05 UTC | 4h 40m |
| 2026-05-06 | QTR15Q | DOH → JFK | May 6, 23:30 UTC | May 7, 20:05 UTC | 20h 35m |
| 2026-05-06 | QTR572 | DOH → BLR | May 6, 21:00 UTC | May 6, 21:35 UTC | 35m |
| 2026-05-06 | QTR63A | AMS → DOH | May 6, 07:45 UTC | May 6, 13:50 UTC | 6h 5m |
| 2026-05-06 | QTR61T | DOH → LHR | May 6, 00:20 UTC | May 6, 05:25 UTC | 5h 5m |
| 2026-05-05 | QTR17E | - | May 5, 02:40 UTC | May 5, 14:25 UTC | 11h 45m |
| 2026-05-04 | QTR4E | DOH → BNE | May 4, 07:25 UTC | May 4, 20:55 UTC | 13h 31m |
| 2026-05-03 | QTR32N | DOH → SJJ | May 3, 23:20 UTC | May 4, 03:05 UTC | 3h 45m |
| 2026-05-03 | QTR572 | DOH → BLR | May 3, 17:50 UTC | May 3, 21:10 UTC | 3h 20m |
| 2026-05-03 | QTR98P | DOH → IAD | May 3, 00:45 UTC | May 3, 13:45 UTC | 12h 59m |
| 2026-05-02 | QTR20V | DOH → ORD | May 2, 07:10 UTC | May 2, 21:20 UTC | 14h 10m |
| 2026-05-01 | QTR21L | LAX → LGG | May 1, 15:25 UTC | May 1, 21:30 UTC | 6h 5m |
| 2026-05-01 | QTR7P | PHL → DOH | May 1, 05:10 UTC | May 1, 11:55 UTC | 6h 45m |
| 2026-04-30 | QTR29F | LHR → DOH | Apr 30, 07:30 UTC | Apr 30, 13:40 UTC | 6h 10m |
| 2026-04-29 | QTR40C | DOH → LHR | Apr 29, 22:15 UTC | Apr 30, 05:10 UTC | 6h 54m |
| 2026-04-28 | QTR53Y | - | Apr 28, 20:55 UTC | Apr 29, 03:24 UTC | 6h 30m |
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 A7-ANE page for operator, model, and routing details .