sensors Mode-S transponder
507C71
ICAO 24-bit transponder address · allocated to Uzbekistan
Currently assigned to UK32110 · AIRBUS A-321neo
- Hex
- 507C71
- Octal
- 24076161
- Decimal
- 5,274,737
- Country
- UZ
- Tail
- UK32110
- Type
- A21N
- Flights observed
- 143
- Distinct callsigns
- 12
- Country
- UZ
- Last broadcast
- 14h ago
Last known position
Country allocation
The ICAO 24-bit address 507C71 falls within the block assigned to Uzbekistan (UZ) by ICAO Annex 10, Volume III. Every aircraft registered in Uzbekistan 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
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| QNT2232 | Qanot Sharq | 62 | 2026-05-28 |
| QNT2231 | - | 26 | 2026-05-28 |
| QNT2240 | - | 12 | 2026-05-27 |
| QNT444 | - | 8 | 2026-05-22 |
| QNT443 | - | 8 | 2026-05-21 |
| QNT492 | - | 7 | 2026-05-12 |
| QNT2239 | - | 5 | 2026-05-26 |
| QNT821 | - | 4 | 2026-05-28 |
| QNT415 | - | 4 | 2026-05-02 |
| QNT491 | - | 3 | 2026-04-14 |
| QNT416 | - | 3 | 2026-05-02 |
| QNT822 | Qanot Sharq | 1 | 2026-05-28 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-28 | QNT2232 | CXR → TAS | May 28, 22:30 UTC | May 29, 11:05 UTC | 12h 35m |
| 2026-05-28 | QNT2231 | - | May 28, 05:15 UTC | May 29, 03:05 UTC | 21h 50m |
| 2026-05-28 | QNT822 | ICN → TAS | May 28, 03:50 UTC | May 28, 04:10 UTC | 20m |
| 2026-05-28 | QNT821 | - | May 28, 00:50 UTC | May 28, 01:10 UTC | 20m |
| 2026-05-27 | QNT2240 | - | May 27, 04:24 UTC | May 28, 00:00 UTC | 19h 36m |
| 2026-05-27 | QNT2240 | - | May 27, 00:19 UTC | May 28, 00:00 UTC | 23h 41m |
| 2026-05-26 | QNT2239 | - | May 26, 20:20 UTC | May 27, 09:00 UTC | 12h 40m |
| 2026-05-26 | QNT2239 | - | May 26, 10:20 UTC | May 27, 09:00 UTC | 22h 40m |
| 2026-05-26 | QNT2232 | CXR → TAS | May 26, 07:05 UTC | May 27, 05:49 UTC | 22h 45m |
| 2026-05-26 | QNT2232 | CXR → TAS | May 26, 02:24 UTC | May 27, 00:34 UTC | 22h 10m |
| 2026-05-26 | QNT2232 | CXR → TAS | May 26, 00:19 UTC | May 27, 00:14 UTC | 23h 55m |
| 2026-05-25 | QNT2232 | CXR → TAS | May 25, 22:49 UTC | May 26, 22:15 UTC | 23h 25m |
| 2026-05-25 | QNT2231 | - | May 25, 05:05 UTC | May 26, 03:15 UTC | 22h 10m |
| 2026-05-25 | QNT821 | - | May 25, 02:30 UTC | May 25, 02:55 UTC | 25m |
| 2026-05-24 | QNT2232 | CXR → TAS | May 24, 03:50 UTC | May 24, 16:30 UTC | 12h 40m |
| 2026-05-23 | QNT2231 | - | May 23, 12:20 UTC | May 24, 12:15 UTC | 23h 55m |
| 2026-05-23 | QNT2231 | - | May 23, 08:20 UTC | May 24, 08:10 UTC | 23h 50m |
| 2026-05-23 | QNT2231 | - | May 23, 06:20 UTC | May 24, 06:05 UTC | 23h 45m |
| 2026-05-23 | QNT2231 | - | May 23, 04:20 UTC | May 24, 04:15 UTC | 23h 56m |
| 2026-05-22 | QNT2231 | - | May 22, 18:20 UTC | May 23, 13:45 UTC | 19h 24m |
| 2026-05-22 | QNT2231 | - | May 22, 17:40 UTC | May 23, 13:45 UTC | 20h 4m |
| 2026-05-22 | QNT444 | LGW → FRA | May 22, 00:20 UTC | May 22, 15:45 UTC | 15h 25m |
| 2026-05-21 | QNT443 | ICN → LGW | May 21, 05:05 UTC | May 21, 22:55 UTC | 17h 50m |
| 2026-05-21 | QNT821 | - | May 21, 00:50 UTC | May 21, 01:10 UTC | 20m |
| 2026-05-20 | QNT821 | - | May 20, 23:35 UTC | May 21, 00:00 UTC | 25m |
| 2026-05-18 | QNT2232 | CXR → TAS | May 18, 23:25 UTC | May 19, 11:40 UTC | 12h 15m |
| 2026-05-18 | QNT2231 | - | May 18, 06:20 UTC | May 19, 03:30 UTC | 21h 9m |
| 2026-05-18 | QNT2231 | - | May 18, 06:10 UTC | May 19, 03:30 UTC | 21h 19m |
| 2026-05-18 | QNT2231 | - | May 18, 00:20 UTC | May 19, 00:15 UTC | 23h 54m |
| 2026-05-17 | QNT2239 | - | May 17, 20:30 UTC | May 18, 07:00 UTC | 10h 30m |
| 2026-05-17 | QNT2239 | - | May 17, 10:20 UTC | May 18, 07:00 UTC | 20h 40m |
| 2026-05-17 | QNT2239 | - | May 17, 08:20 UTC | May 18, 07:00 UTC | 22h 40m |
| 2026-05-17 | QNT2232 | CXR → TAS | May 17, 07:00 UTC | May 18, 06:10 UTC | 23h 10m |
| 2026-05-17 | QNT2232 | CXR → TAS | May 17, 02:20 UTC | May 18, 00:45 UTC | 22h 25m |
| 2026-05-17 | QNT2232 | CXR → TAS | May 17, 00:20 UTC | May 18, 00:15 UTC | 23h 55m |
| 2026-05-16 | QNT2232 | CXR → TAS | May 16, 23:20 UTC | May 17, 22:15 UTC | 22h 55m |
| 2026-05-16 | QNT2232 | CXR → TAS | May 16, 10:31 UTC | May 17, 10:15 UTC | 23h 45m |
| 2026-05-16 | QNT2232 | CXR → TAS | May 16, 08:20 UTC | May 17, 08:15 UTC | 23h 55m |
| 2026-05-16 | QNT2232 | CXR → TAS | May 16, 07:20 UTC | May 17, 03:25 UTC | 20h 5m |
| 2026-05-16 | QNT2232 | CXR → TAS | May 16, 02:40 UTC | May 17, 01:35 UTC | 22h 55m |
| 2026-05-16 | QNT2232 | CXR → TAS | May 16, 00:20 UTC | May 17, 00:15 UTC | 23h 56m |
| 2026-05-15 | QNT2232 | CXR → TAS | May 15, 17:10 UTC | May 16, 12:05 UTC | 18h 56m |
| 2026-05-15 | QNT2232 | CXR → TAS | May 15, 14:20 UTC | May 16, 12:05 UTC | 21h 45m |
| 2026-05-15 | QNT2232 | CXR → TAS | May 15, 13:40 UTC | May 16, 12:05 UTC | 22h 25m |
| 2026-05-14 | QNT444 | LGW → FRA | May 14, 21:00 UTC | May 15, 11:50 UTC | 14h 50m |
| 2026-05-14 | QNT443 | - | May 14, 05:50 UTC | May 14, 19:00 UTC | 13h 10m |
| 2026-05-13 | QNT443 | - | May 13, 22:20 UTC | May 14, 19:00 UTC | 20h 40m |
| 2026-05-13 | QNT443 | - | May 13, 21:40 UTC | May 14, 19:00 UTC | 21h 20m |
| 2026-05-12 | QNT492 | - | May 12, 13:30 UTC | May 12, 17:40 UTC | 4h 10m |
| 2026-05-11 | QNT444 | LGW → FRA | May 11, 17:45 UTC | May 12, 11:10 UTC | 17h 25m |
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 UK32110 page for operator, model, and routing details .