sensors Mode-S transponder
06A391
ICAO 24-bit transponder address · allocated to Qatar
Currently assigned to A7-BTB · BOEING 777-200LR
- Hex
- 06A391
- Octal
- 01521621
- Decimal
- 435,089
- Country
- QA
- Tail
- A7-BTB
- Type
- B77L
- Flights observed
- 133
- Distinct callsigns
- 20
- Country
- QA
- Last broadcast
- 6h ago
Current position
Country allocation
The ICAO 24-bit address 06A391 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 |
|---|---|---|---|
| QTR8356 | Qatar Airways | 20 | 2026-04-20 |
| QTR8357 | Qatar Airways | 18 | 2026-04-18 |
| QTR8942 | Qatar Airways | 7 | 2026-05-25 |
| QTR8139 | Qatar Airways | 6 | 2026-05-11 |
| QTR8476 | Qatar Airways | 3 | 2026-04-26 |
| QTR8440 | Qatar Airways | 3 | 2026-05-05 |
| QTR8140 | Qatar Airways | 3 | 2026-05-12 |
| QTR8094 | Qatar Airways | 3 | 2026-04-29 |
| QTR8985 | Qatar Airways | 2 | 2026-04-18 |
| QTR8984 | Qatar Airways | 2 | 2026-04-18 |
| QTR8970 | Qatar Airways | 2 | 2026-05-13 |
| QTR8965 | Qatar Airways | 2 | 2026-04-22 |
| QTR8963 | Qatar Airways | 2 | 2026-05-07 |
| QTR8949 | Qatar Airways | 2 | 2026-05-27 |
| QTR8477 | Qatar Airways | 2 | 2026-04-26 |
| QTR8452 | Qatar Airways | 2 | 2026-05-02 |
| QTR8441 | Qatar Airways | 2 | 2026-05-05 |
| QTR8437 | Qatar Airways | 2 | 2026-04-24 |
| QTR8430 | Qatar Airways | 2 | 2026-05-23 |
| QTR8405 | Qatar Airways | 2 | 2026-05-01 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | QTR8160 | AMS → DOH | May 29, 09:55 UTC | May 30, 01:10 UTC | 15h 15m |
| 2026-05-29 | QTR8159 | GRU → BOG | May 29, 06:05 UTC | May 29, 07:35 UTC | 1h 30m |
| 2026-05-27 | QTR8949 | SZX → DOH | May 27, 21:10 UTC | May 28, 02:10 UTC | 5h 0m |
| 2026-05-27 | QTR8949 | SZX → DOH | May 27, 20:30 UTC | May 27, 20:40 UTC | 10m |
| 2026-05-27 | QTR47V | MXP → ORD | May 27, 05:45 UTC | May 27, 06:25 UTC | 40m |
| 2026-05-27 | QTR8612 | DOH → AMD | May 27, 02:09 UTC | May 27, 03:04 UTC | 55m |
| 2026-05-26 | QTR8258 | CDG → DOH | May 26, 15:49 UTC | May 26, 22:15 UTC | 6h 25m |
| 2026-05-25 | QTR8257 | DOH → PRG | May 25, 22:05 UTC | May 26, 13:19 UTC | 15h 15m |
| 2026-05-25 | QTR8942 | DOH → CAN | May 25, 11:45 UTC | May 25, 15:00 UTC | 3h 15m |
| 2026-05-25 | QTR8262 | LGG → CDG | May 25, 01:55 UTC | May 25, 07:25 UTC | 5h 30m |
| 2026-05-24 | QTR6E | - | May 24, 04:35 UTC | May 24, 20:35 UTC | 16h 0m |
| 2026-05-24 | QTR8431 | GRU → REC | May 24, 02:15 UTC | May 24, 02:30 UTC | 15m |
| 2026-05-23 | QTR8430 | DOH → HKG | May 23, 20:00 UTC | May 23, 20:30 UTC | 30m |
| 2026-05-23 | QTR8430 | DOH → HKG | May 23, 14:45 UTC | May 23, 18:05 UTC | 3h 20m |
| 2026-05-23 | QTR38T | - | May 23, 02:40 UTC | May 23, 08:05 UTC | 5h 25m |
| 2026-05-22 | QTR8214 | MAD → MXP | May 22, 22:40 UTC | May 23, 00:10 UTC | 1h 30m |
| 2026-05-22 | QTR7X | DOH → MEL | May 22, 04:15 UTC | May 22, 19:10 UTC | 14h 55m |
| 2026-05-22 | QTR8435 | GRU → SDU | May 22, 02:10 UTC | May 22, 02:25 UTC | 15m |
| 2026-05-21 | QTR8040 | DOH → FRA | May 21, 17:50 UTC | May 21, 23:35 UTC | 5h 45m |
| 2026-05-21 | QTR8955 | HAN → DOH | May 21, 14:00 UTC | May 21, 14:15 UTC | 15m |
| 2026-05-20 | QTR8954 | DOH → HAN | May 20, 16:20 UTC | May 21, 12:10 UTC | 19h 50m |
| 2026-05-20 | QTR8031 | MUC → DOH | May 20, 14:20 UTC | May 21, 12:10 UTC | 21h 50m |
| 2026-05-20 | QTR8031 | MUC → DOH | May 20, 13:15 UTC | May 21, 12:10 UTC | 22h 55m |
| 2026-05-19 | QTR8030 | MUC → RFD | May 19, 21:50 UTC | May 20, 10:50 UTC | 13h 1m |
| 2026-05-19 | QTR8401 | HKG → DOH | May 19, 19:50 UTC | May 19, 20:05 UTC | 15m |
| 2026-05-18 | QTR8400 | IKA → HKG | May 18, 22:20 UTC | May 19, 16:55 UTC | 18h 35m |
| 2026-05-18 | QTR8400 | IKA → HKG | May 18, 18:20 UTC | May 19, 16:55 UTC | 22h 34m |
| 2026-05-18 | QTR8398 | DOH → HYD | May 18, 16:30 UTC | May 19, 14:20 UTC | 21h 49m |
| 2026-05-17 | QTR8941 | CAN → DOH | May 17, 20:01 UTC | May 18, 12:05 UTC | 16h 5m |
| 2026-05-17 | QTR8940 | DOH → CAN | May 17, 11:30 UTC | May 17, 14:25 UTC | 2h 55m |
| 2026-05-16 | QTR20X | - | May 16, 19:40 UTC | May 17, 01:25 UTC | 5h 45m |
| 2026-05-15 | QTR29G | - | May 15, 20:10 UTC | May 16, 13:55 UTC | 17h 46m |
| 2026-05-14 | QTR8942 | DOH → CAN | May 14, 21:40 UTC | May 15, 14:45 UTC | 17h 5m |
| 2026-05-14 | QTR8942 | DOH → CAN | May 14, 01:20 UTC | May 14, 14:55 UTC | 13h 35m |
| 2026-05-13 | QTR8942 | DOH → CAN | May 13, 18:30 UTC | May 14, 14:55 UTC | 20h 25m |
| 2026-05-13 | QTR8942 | DOH → CAN | May 13, 17:10 UTC | May 14, 14:55 UTC | 21h 45m |
| 2026-05-13 | QTR8970 | DOH → SGN | May 13, 15:10 UTC | May 14, 14:15 UTC | 23h 5m |
| 2026-05-13 | QTR8970 | DOH → SGN | May 13, 13:35 UTC | May 14, 12:15 UTC | 22h 40m |
| 2026-05-13 | QTR8595 | ORD → LGG | May 13, 09:35 UTC | May 13, 10:05 UTC | 30m |
| 2026-05-12 | QTR8140 | ORD → HNL | May 12, 02:50 UTC | May 12, 03:25 UTC | 35m |
| 2026-05-11 | QTR8140 | ORD → HNL | May 11, 13:40 UTC | May 11, 22:35 UTC | 8h 55m |
| 2026-05-11 | QTR8139 | MXP → ORD | May 11, 08:10 UTC | May 11, 09:40 UTC | 1h 30m |
| 2026-05-10 | QTR8139 | MXP → ORD | May 10, 17:30 UTC | May 11, 05:15 UTC | 11h 45m |
| 2026-05-10 | QTR8139 | MXP → ORD | May 10, 08:50 UTC | May 10, 14:34 UTC | 5h 45m |
| 2026-05-09 | QTR20X | - | May 9, 18:50 UTC | May 10, 00:55 UTC | 6h 5m |
| 2026-05-08 | QTR79U | - | May 8, 22:05 UTC | May 9, 13:40 UTC | 15h 35m |
| 2026-05-08 | QTR8942 | DOH → CAN | May 8, 01:24 UTC | May 8, 15:20 UTC | 13h 55m |
| 2026-05-07 | QTR8961 | PVG → DOH | May 7, 13:00 UTC | May 8, 02:44 UTC | 13h 45m |
| 2026-05-07 | QTR8963 | PVG → DOH | May 7, 00:10 UTC | May 7, 14:05 UTC | 13h 55m |
| 2026-05-06 | QTR8963 | PVG → DOH | May 6, 13:20 UTC | May 7, 01:20 UTC | 11h 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 A7-BTB page for operator, model, and routing details .