sensors Mode-S transponder
06A1DD
ICAO 24-bit transponder address · allocated to Qatar
Currently assigned to A7-CHD · GULFSTREAM G700
- Hex
- 06A1DD
- Octal
- 01520735
- Decimal
- 434,653
- Country
- QA
- Tail
- A7-CHD
- Type
- GA7C
- Flights observed
- 27
- Distinct callsigns
- 12
- Country
- QA
- Last broadcast
- 14h ago
Last known position
Country allocation
The ICAO 24-bit address 06A1DD 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 12 distinct
Recent flights last 27
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | QQE745 | - | May 29, 07:55 UTC | May 29, 11:00 UTC | 3h 5m |
| 2026-05-27 | QQE738 | - | May 27, 23:30 UTC | May 28, 09:30 UTC | 10h 0m |
| 2026-05-27 | QQE927 | - | May 27, 09:50 UTC | May 27, 19:20 UTC | 9h 30m |
| 2026-05-24 | QQE912 | - | May 24, 15:50 UTC | May 24, 19:50 UTC | 4h 0m |
| 2026-05-24 | QQE912 | - | May 24, 13:30 UTC | May 24, 13:45 UTC | 15m |
| 2026-05-24 | QQE912 | - | May 24, 10:50 UTC | May 24, 12:50 UTC | 2h 0m |
| 2026-05-23 | QQE522 | - | May 23, 02:05 UTC | May 23, 09:15 UTC | 7h 9m |
| 2026-05-19 | QQE505 | - | May 19, 10:15 UTC | May 19, 14:55 UTC | 4h 40m |
| 2026-05-17 | QQE528 | - | May 17, 02:05 UTC | May 17, 08:05 UTC | 6h 0m |
| 2026-05-16 | QQE103 | - | May 16, 08:55 UTC | May 16, 11:01 UTC | 2h 5m |
| 2026-04-25 | QQE592 | - | Apr 25, 06:40 UTC | Apr 25, 08:35 UTC | 1h 55m |
| 2026-04-23 | QQE592 | MAD → DEL | Apr 23, 22:20 UTC | Apr 24, 06:55 UTC | 8h 35m |
| 2026-04-22 | QQE771 | - | Apr 22, 13:45 UTC | Apr 22, 16:35 UTC | 2h 50m |
| 2026-04-21 | QQE771 | - | Apr 21, 11:20 UTC | Apr 21, 17:01 UTC | 5h 40m |
| 2026-04-18 | QQE908 | - | Apr 18, 16:25 UTC | Apr 18, 17:40 UTC | 1h 15m |
| 2026-04-17 | QQE908 | - | Apr 17, 18:00 UTC | Apr 17, 19:05 UTC | 1h 5m |
| 2026-04-17 | QQE908 | - | Apr 17, 15:20 UTC | Apr 17, 16:15 UTC | 55m |
| 2026-04-17 | QQE908 | - | Apr 17, 13:20 UTC | Apr 17, 15:15 UTC | 1h 54m |
| 2026-04-17 | QQE908 | - | Apr 17, 12:05 UTC | Apr 17, 13:15 UTC | 1h 10m |
| 2026-04-17 | QQE908 | - | Apr 17, 09:20 UTC | Apr 17, 09:35 UTC | 15m |
| 2026-04-17 | QQE908 | - | Apr 17, 07:20 UTC | Apr 17, 09:15 UTC | 1h 55m |
| 2026-04-17 | QQE908 | - | Apr 17, 06:10 UTC | Apr 17, 07:15 UTC | 1h 5m |
| 2026-04-13 | QQE708 | - | Apr 13, 16:45 UTC | Apr 13, 17:30 UTC | 45m |
| 2026-04-13 | QQE708 | - | Apr 13, 15:50 UTC | Apr 13, 17:30 UTC | 1h 40m |
| 2026-04-13 | QQE708 | - | Apr 13, 12:35 UTC | Apr 13, 16:05 UTC | 3h 30m |
| 2026-04-13 | QQE708 | - | Apr 13, 00:30 UTC | Apr 13, 02:45 UTC | 2h 15m |
| 2026-04-12 | QQE708 | - | Apr 12, 23:55 UTC | Apr 13, 02:45 UTC | 2h 50m |
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-CHD page for operator, model, and routing details .