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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
No current signal · last broadcast 27m ago
Flights observed
299
Distinct callsigns
12
Country
UZ
Last broadcast
27m ago

Last known position

Most recent position reported by Mode-S 507C71.

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 - 107 2026-07-12
QNT2231 - 60 2026-07-13
QNT2240 - 37 2026-07-11
QNT2239 - 29 2026-07-10
QNT821 - 18 2026-07-13
QNT443 - 10 2026-06-04
QNT822 - 9 2026-07-09
QNT444 - 9 2026-06-01
QNT492 - 8 2026-06-02
QNT415 - 5 2026-05-30
QNT416 - 4 2026-05-30
QNT491 - 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 QNT2231 - Jul 13, 03:55 UTCJul 14, 02:15 UTC22h 20m
2026-07-13 QNT821 - Jul 13, 00:55 UTCJul 13, 01:15 UTC20m
2026-07-12 QNT2232 - Jul 12, 07:01 UTCJul 13, 00:05 UTC17h 5m
2026-07-12 QNT2232 - Jul 12, 02:20 UTCJul 13, 00:05 UTC21h 45m
2026-07-11 QNT2231 - Jul 11, 22:20 UTCJul 12, 08:30 UTC10h 10m
2026-07-11 QNT2231 - Jul 11, 10:20 UTCJul 12, 08:30 UTC22h 10m
2026-07-11 QNT2231 - Jul 11, 08:20 UTCJul 12, 08:15 UTC23h 55m
2026-07-11 QNT2231 - Jul 11, 07:05 UTCJul 12, 02:30 UTC19h 25m
2026-07-11 QNT2231 - Jul 11, 02:20 UTCJul 12, 02:15 UTC23h 55m
2026-07-11 QNT2240 - Jul 11, 00:20 UTCJul 12, 00:15 UTC23h 55m
2026-07-10 QNT2239 - Jul 10, 22:15 UTCJul 11, 11:15 UTC13h 0m
2026-07-10 QNT2239 - Jul 10, 08:20 UTCJul 11, 08:15 UTC23h 55m
2026-07-10 QNT2239 - Jul 10, 06:45 UTCJul 11, 02:30 UTC19h 45m
2026-07-10 QNT2231 - Jul 10, 00:20 UTCJul 11, 00:15 UTC23h 55m
2026-07-09 QNT2231 - Jul 9, 22:20 UTCJul 10, 22:15 UTC23h 55m
2026-07-09 QNT2231 - Jul 9, 22:00 UTCJul 10, 08:20 UTC10h 20m
2026-07-09 QNT2231 - Jul 9, 05:15 UTCJul 10, 02:10 UTC20h 55m
2026-07-09 QNT822 - Jul 9, 03:55 UTCJul 9, 04:20 UTC25m
2026-07-09 QNT821 - Jul 9, 00:50 UTCJul 9, 01:05 UTC15m
2026-07-08 QNT2240 - Jul 8, 04:20 UTCJul 9, 00:05 UTC19h 45m
2026-07-08 QNT2240 - Jul 8, 02:20 UTCJul 9, 00:05 UTC21h 45m
2026-07-08 QNT2239 - Jul 8, 01:55 UTCJul 9, 00:05 UTC22h 10m
2026-07-07 QNT2239 - Jul 7, 10:40 UTCJul 8, 10:15 UTC23h 35m
2026-07-07 QNT2239 - Jul 7, 08:20 UTCJul 8, 05:45 UTC21h 25m
2026-07-07 QNT2232 - Jul 7, 07:10 UTCJul 8, 05:45 UTC22h 35m
2026-07-06 QNT2232 - Jul 6, 22:50 UTCJul 7, 11:45 UTC12h 55m
2026-07-06 QNT2231 - Jul 6, 05:40 UTCJul 6, 23:50 UTC18h 10m
2026-07-06 QNT822 - Jul 6, 04:25 UTCJul 6, 04:45 UTC20m
2026-07-06 QNT821 - Jul 6, 01:15 UTCJul 6, 01:50 UTC35m
2026-07-05 QNT2232 - Jul 5, 07:30 UTCJul 6, 00:30 UTC17h 0m
2026-07-05 QNT2232 - Jul 5, 02:20 UTCJul 6, 00:30 UTC22h 10m
2026-07-05 QNT2232 - Jul 5, 00:35 UTCJul 6, 00:15 UTC23h 40m
2026-07-04 QNT2232 - Jul 4, 23:00 UTCJul 5, 12:05 UTC13h 5m
2026-07-04 QNT2231 - Jul 4, 10:40 UTCJul 5, 10:15 UTC23h 35m
2026-07-04 QNT2231 - Jul 4, 08:20 UTCJul 5, 08:15 UTC23h 55m
2026-07-04 QNT2231 - Jul 4, 07:10 UTCJul 5, 03:45 UTC20h 35m
2026-07-04 QNT2240 - Jul 4, 02:20 UTCJul 5, 02:15 UTC23h 55m
2026-07-04 QNT2240 - Jul 4, 00:25 UTCJul 5, 00:05 UTC23h 40m
2026-07-03 QNT2240 - Jul 3, 22:55 UTCJul 4, 11:40 UTC12h 45m
2026-07-03 QNT2239 - Jul 3, 10:20 UTCJul 4, 10:05 UTC23h 45m
2026-07-03 QNT2239 - Jul 3, 08:20 UTCJul 4, 08:15 UTC23h 55m
2026-07-03 QNT2232 - Jul 3, 06:25 UTCJul 4, 02:40 UTC20h 15m
2026-07-03 QNT2232 - Jul 3, 00:20 UTCJul 3, 23:50 UTC23h 30m
2026-07-02 QNT2232 - Jul 2, 22:20 UTCJul 3, 10:55 UTC12h 35m
2026-07-02 QNT2231 - Jul 2, 03:55 UTCJul 3, 02:10 UTC22h 15m
2026-07-02 QNT821 - Jul 2, 01:00 UTCJul 2, 01:20 UTC20m
2026-07-01 QNT2240 - Jul 1, 04:20 UTCJul 2, 00:05 UTC19h 45m
2026-07-01 QNT2240 - Jul 1, 02:20 UTCJul 2, 00:05 UTC21h 45m
2026-07-01 QNT2240 - Jul 1, 01:55 UTCJul 2, 00:05 UTC22h 10m
2026-06-30 QNT2239 - Jun 30, 10:20 UTCJul 1, 05:50 UTC19h 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 UK32110 page for operator, model, and routing details .

Mode-S 507C71 frequently asked

What is Mode-S code 507C71?
507C71 is an ICAO 24-bit transponder address. Allocated to Uzbekistan. Assigned to UK32110.
Where is Mode-S 507C71 registered?
Mode-S code 507C71 is allocated to Uzbekistan (UZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 507C71 broadcasting right now?
No active broadcast right now. Last signal was 27m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 507C71, octal 24076161, decimal 5,274,737.
What flights does 507C71 operate?
Mode-S 507C71 has broadcast 12 distinct callsigns, including QNT2232, QNT2231, QNT2240, QNT2239, QNT821.