sensors Mode-S transponder
06A1BF
ICAO 24-bit transponder address · allocated to Qatar
Currently assigned to A7-BEI · BOEING 777-300ER
- Hex
- 06A1BF
- Octal
- 01520677
- Decimal
- 434,623
- Country
- QA
- Tail
- A7-BEI
- Type
- B77W
- Flights observed
- 72
- Distinct callsigns
- 20
- Country
- QA
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 06A1BF 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 |
|---|---|---|---|
| QTR1V | Qatar Airways | 7 | 2026-05-28 |
| QTR871 | Qatar Airways | 5 | 2026-05-07 |
| QTR837 | Qatar Airways | 5 | 2026-04-26 |
| QTR933 | Qatar Airways | 4 | 2026-05-16 |
| QTR932 | Qatar Airways | 4 | 2026-05-15 |
| QTR836 | Qatar Airways | 4 | 2026-04-26 |
| QTR33W | Qatar Airways | 4 | 2026-05-28 |
| QTR1J | Qatar Airways | 4 | 2026-04-17 |
| QTR90C | Qatar Airways | 2 | 2026-04-23 |
| QTR875 | Qatar Airways | 2 | 2026-05-10 |
| QTR870 | Qatar Airways | 2 | 2026-04-28 |
| QTR859 | Qatar Airways | 2 | 2026-04-15 |
| QTR858 | Qatar Airways | 2 | 2026-04-14 |
| QTR848 | Qatar Airways | 2 | 2026-04-29 |
| QTR22L | - | 2 | 2026-05-30 |
| QTR1191 | Qatar Airways | 2 | 2026-05-04 |
| QTR874 | Qatar Airways | 1 | 2026-05-05 |
| QTR849 | Qatar Airways | 1 | 2026-04-29 |
| QTR807 | Qatar Airways | 1 | 2026-05-24 |
| QTR806 | Qatar Airways | 1 | 2026-05-24 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | QTR22L | - | May 30, 02:20 UTC | May 30, 02:50 UTC | 30m |
| 2026-05-30 | QTR22L | - | May 30, 00:25 UTC | May 30, 00:35 UTC | 10m |
| 2026-05-29 | QTR61G | DOH → OTP | May 29, 16:30 UTC | May 29, 19:10 UTC | 2h 40m |
| 2026-05-28 | QTR1V | LHR → ISU | May 28, 21:10 UTC | May 29, 00:10 UTC | 3h 0m |
| 2026-05-28 | QTR33W | DOH → LHR | May 28, 17:10 UTC | May 28, 18:45 UTC | 1h 35m |
| 2026-05-27 | QTR33W | DOH → LHR | May 27, 21:50 UTC | May 28, 18:45 UTC | 20h 55m |
| 2026-05-27 | QTR33W | DOH → LHR | May 27, 21:25 UTC | May 28, 18:45 UTC | 21h 20m |
| 2026-05-27 | QTR1A | DOH → BEY | May 27, 18:20 UTC | May 27, 18:35 UTC | 15m |
| 2026-05-26 | QTR1V | LHR → ISU | May 26, 21:14 UTC | May 27, 13:05 UTC | 15h 51m |
| 2026-05-26 | QTR33W | DOH → LHR | May 26, 15:14 UTC | May 26, 18:24 UTC | 3h 10m |
| 2026-05-24 | QTR807 | NRT → DOH | May 24, 13:45 UTC | May 24, 20:10 UTC | 6h 25m |
| 2026-05-24 | QTR806 | DOH → NRT | May 24, 08:55 UTC | May 24, 10:45 UTC | 1h 50m |
| 2026-05-16 | QTR933 | MNL → DOH | May 16, 10:25 UTC | May 16, 17:01 UTC | 6h 35m |
| 2026-05-15 | QTR932 | DOH → MNL | May 15, 14:55 UTC | May 16, 08:16 UTC | 17h 21m |
| 2026-05-15 | QTR932 | DOH → MNL | May 15, 12:05 UTC | May 16, 08:16 UTC | 20h 10m |
| 2026-05-14 | QTR933 | MNL → DOH | May 14, 12:40 UTC | May 15, 07:10 UTC | 18h 30m |
| 2026-05-14 | QTR933 | MNL → DOH | May 14, 10:35 UTC | May 15, 07:10 UTC | 20h 35m |
| 2026-05-14 | QTR932 | DOH → MNL | May 14, 02:00 UTC | May 14, 08:40 UTC | 6h 40m |
| 2026-05-12 | QTR67H | SKT → DOH | May 12, 18:40 UTC | May 12, 22:50 UTC | 4h 10m |
| 2026-05-12 | QTR1F | SFO → DOH | May 12, 13:10 UTC | May 12, 16:40 UTC | 3h 30m |
| 2026-05-10 | QTR875 | CAN → DOH | May 10, 20:00 UTC | May 11, 00:00 UTC | 4h 0m |
| 2026-05-09 | QTR65L | DOH → LGG | May 9, 15:05 UTC | May 9, 18:10 UTC | 3h 5m |
| 2026-05-07 | QTR871 | PVG → DOH | May 7, 04:25 UTC | May 7, 22:10 UTC | 17h 45m |
| 2026-05-05 | QTR875 | CAN → DOH | May 5, 18:10 UTC | May 6, 02:45 UTC | 8h 35m |
| 2026-05-05 | QTR874 | DOH → CAN | May 5, 03:45 UTC | May 5, 05:00 UTC | 1h 15m |
| 2026-05-04 | QTR1191 | JED → DOH | May 4, 04:44 UTC | May 4, 10:40 UTC | 5h 55m |
| 2026-05-02 | QTR5V | DOH → IAH | May 2, 21:15 UTC | May 2, 21:40 UTC | 25m |
| 2026-05-02 | QTR6B | DOH → JFK | May 2, 13:15 UTC | May 2, 16:00 UTC | 2h 45m |
| 2026-04-30 | QTR1191 | JED → DOH | Apr 30, 06:40 UTC | Apr 30, 13:30 UTC | 6h 50m |
| 2026-04-29 | QTR849 | KUL → DOH | Apr 29, 18:25 UTC | Apr 30, 01:15 UTC | 6h 49m |
| 2026-04-29 | QTR848 | DOH → KUL | Apr 29, 12:30 UTC | Apr 29, 13:00 UTC | 30m |
| 2026-04-29 | QTR848 | DOH → KUL | Apr 29, 06:25 UTC | Apr 29, 09:45 UTC | 3h 21m |
| 2026-04-28 | QTR871 | PVG → DOH | Apr 28, 20:55 UTC | Apr 29, 02:24 UTC | 5h 30m |
| 2026-04-28 | QTR871 | PVG → DOH | Apr 28, 04:15 UTC | Apr 29, 02:24 UTC | 22h 10m |
| 2026-04-28 | QTR870 | DOH → PVG | Apr 28, 00:55 UTC | Apr 28, 23:35 UTC | 22h 40m |
| 2026-04-26 | QTR837 | BKK → DOH | Apr 26, 19:55 UTC | Apr 27, 02:30 UTC | 6h 35m |
| 2026-04-26 | QTR836 | DOH → BKK | Apr 26, 01:00 UTC | Apr 26, 07:10 UTC | 6h 10m |
| 2026-04-25 | QTR27L | BEY → DOH | Apr 25, 13:05 UTC | Apr 25, 13:40 UTC | 35m |
| 2026-04-25 | QTR63N | - | Apr 25, 05:00 UTC | Apr 25, 05:25 UTC | 25m |
| 2026-04-24 | QTR2N | DUB → DOH | Apr 24, 05:30 UTC | Apr 24, 09:30 UTC | 4h 0m |
| 2026-04-23 | QTR90C | DOH → IAD | Apr 23, 23:50 UTC | Apr 24, 00:05 UTC | 15m |
| 2026-04-23 | QTR90C | DOH → IAD | Apr 23, 17:35 UTC | Apr 23, 20:50 UTC | 3h 15m |
| 2026-04-22 | QTR933 | MNL → DOH | Apr 22, 10:20 UTC | Apr 22, 19:15 UTC | 8h 55m |
| 2026-04-22 | QTR932 | DOH → MNL | Apr 22, 00:00 UTC | Apr 22, 08:15 UTC | 8h 15m |
| 2026-04-21 | QTR23V | DOH → ARN | Apr 21, 16:45 UTC | Apr 21, 19:15 UTC | 2h 30m |
| 2026-04-21 | QTR73C | - | Apr 21, 10:35 UTC | Apr 21, 13:45 UTC | 3h 10m |
| 2026-04-20 | QTR871 | PVG → DOH | Apr 20, 20:25 UTC | Apr 21, 02:20 UTC | 5h 55m |
| 2026-04-20 | QTR871 | PVG → DOH | Apr 20, 03:55 UTC | Apr 21, 02:20 UTC | 22h 25m |
| 2026-04-20 | QTR870 | DOH → PVG | Apr 20, 00:30 UTC | Apr 20, 22:00 UTC | 21h 30m |
| 2026-04-19 | QTR3R | DOH → BHX | Apr 19, 07:10 UTC | Apr 19, 12:25 UTC | 5h 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 A7-BEI page for operator, model, and routing details .