Apparatus

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sensors Mode-S transponder

507C54

ICAO 24-bit transponder address · allocated to Uzbekistan

Currently assigned to UK-78704 · BOEING 787-8 Dreamliner

Hex
507C54
Octal
24076124
Decimal
5,274,708
Country
UZ
Tail
UK-78704
Type
B788
No current signal · last broadcast 5d ago
Flights observed
173
Distinct callsigns
20
Country
UZ
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S 507C54.

Country allocation

The ICAO 24-bit address 507C54 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 20 distinct

Callsign Airline Flights Last seen
UZB273 Uzbekistan Airways 18 2026-07-07
UZB271 - 9 2026-07-07
UZB255 Uzbekistan Airways 9 2026-06-03
UZB274 Uzbekistan Airways 8 2026-06-11
UZB272 - 8 2026-07-08
UZB256 Uzbekistan Airways 8 2026-06-03
UZB511 - 7 2026-06-22
UZB554 - 6 2026-06-29
UZB515 - 6 2026-06-13
UZB553 - 5 2026-06-28
UZB528 Uzbekistan Airways 5 2026-06-02
UZB514 - 5 2026-06-11
UZB512 - 5 2026-06-23
UZB334 Uzbekistan Airways 5 2026-06-17
UZB333 - 5 2026-06-30
UZB102 - 5 2026-07-03
UZB527 Uzbekistan Airways 4 2026-06-01
UZB513 - 4 2026-07-01
UZB3212 - 4 2026-05-03
UZB202 Uzbekistan Airways 4 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 UZB272 - Jul 8, 10:15 UTCJul 8, 12:00 UTC1h 45m
2026-07-07 UZB271 - Jul 7, 19:20 UTCJul 8, 07:40 UTC12h 20m
2026-07-07 UZB273 TAS → IST Jul 7, 16:35 UTCJul 7, 16:45 UTC10m
2026-07-07 UZB273 TAS → IST Jul 7, 14:20 UTCJul 7, 15:40 UTC1h 20m
2026-07-06 UZB603 - Jul 6, 05:30 UTCJul 6, 09:50 UTC4h 20m
2026-07-05 UZB603 - Jul 5, 10:15 UTCJul 6, 05:45 UTC19h 30m
2026-07-05 UZB603 - Jul 5, 05:50 UTCJul 5, 10:15 UTC4h 25m
2026-07-03 UZB102 - Jul 3, 23:10 UTCJul 4, 01:40 UTC2h 30m
2026-07-03 UZB102 - Jul 3, 17:15 UTCJul 3, 18:40 UTC1h 25m
2026-07-02 UZB101 - Jul 2, 19:30 UTCJul 3, 13:50 UTC18h 20m
2026-07-02 UZB273 TAS → IST Jul 2, 01:55 UTCJul 2, 16:55 UTC15h 0m
2026-07-01 UZB513 - Jul 1, 22:50 UTCJul 1, 23:15 UTC25m
2026-07-01 UZB272 - Jul 1, 09:45 UTCJul 1, 22:15 UTC12h 30m
2026-07-01 UZB271 - Jul 1, 05:10 UTCJul 1, 07:30 UTC2h 20m
2026-06-30 UZB271 - Jun 30, 11:05 UTCJul 1, 07:30 UTC20h 25m
2026-06-30 UZB271 - Jun 30, 09:05 UTCJul 1, 07:30 UTC22h 25m
2026-06-30 UZB333 - Jun 30, 05:55 UTCJun 30, 06:20 UTC25m
2026-06-29 UZB333 - Jun 29, 09:05 UTCJun 30, 06:20 UTC21h 15m
2026-06-29 UZB554 - Jun 29, 07:05 UTCJun 30, 06:20 UTC23h 15m
2026-06-29 UZB554 - Jun 29, 04:20 UTCJun 29, 09:25 UTC5h 5m
2026-06-28 UZB553 - Jun 28, 09:50 UTCJun 29, 01:55 UTC16h 5m
2026-06-27 UZB271 - Jun 27, 19:34 UTCJun 28, 07:34 UTC12h 0m
2026-06-27 UZB273 TAS → IST Jun 27, 16:39 UTCJun 27, 16:59 UTC20m
2026-06-27 UZB273 TAS → IST Jun 27, 01:09 UTCJun 27, 16:04 UTC14h 55m
2026-06-26 UZB102 - Jun 26, 17:04 UTCJun 27, 16:04 UTC23h 0m
2026-06-25 UZB101 - Jun 25, 19:20 UTCJun 26, 13:49 UTC18h 30m
2026-06-25 UZB273 TAS → IST Jun 25, 01:44 UTCJun 25, 17:09 UTC15h 25m
2026-06-24 UZB513 - Jun 24, 23:00 UTCJun 24, 23:29 UTC30m
2026-06-24 UZB272 - Jun 24, 09:55 UTCJun 24, 22:19 UTC12h 25m
2026-06-24 UZB271 - Jun 24, 05:29 UTCJun 24, 07:59 UTC2h 30m
2026-06-23 UZB512 - Jun 23, 02:55 UTCJun 23, 03:15 UTC20m
2026-06-23 UZB512 - Jun 23, 01:35 UTCJun 23, 01:54 UTC20m
2026-06-22 UZB511 - Jun 22, 23:05 UTCJun 22, 23:24 UTC20m
2026-06-22 UZB511 - Jun 22, 21:59 UTCJun 22, 22:24 UTC25m
2026-06-21 UZB3230 - Jun 21, 15:15 UTCJun 21, 16:59 UTC1h 45m
2026-06-20 UZB3229 - Jun 20, 19:19 UTCJun 21, 12:55 UTC17h 35m
2026-06-20 UZB273 TAS → IST Jun 20, 16:29 UTCJun 20, 17:04 UTC35m
2026-06-19 UZB102 - Jun 19, 22:49 UTCJun 20, 15:54 UTC17h 5m
2026-06-19 UZB102 - Jun 19, 16:55 UTCJun 20, 14:59 UTC22h 5m
2026-06-19 UZB101 - Jun 19, 05:09 UTCJun 19, 14:09 UTC9h 0m
2026-06-17 UZB334 DXB → TAS Jun 17, 08:50 UTCJun 17, 09:10 UTC20m
2026-06-17 UZB333 - Jun 17, 06:00 UTCJun 17, 06:10 UTC10m
2026-06-16 UZB613 TAS → VKO Jun 16, 15:15 UTCJun 16, 20:25 UTC5h 11m
2026-06-15 UZB272 IST → TAS Jun 15, 10:15 UTCJun 15, 12:10 UTC1h 55m
2026-06-14 UZB204 LHR → TAS Jun 14, 17:40 UTCJun 15, 07:55 UTC14h 15m
2026-06-13 UZB203 TAS → LHR Jun 13, 23:35 UTCJun 14, 15:40 UTC16h 5m
2026-06-13 UZB515 - Jun 13, 21:20 UTCJun 13, 21:45 UTC25m
2026-06-13 UZB424 DEL → TAS Jun 13, 08:40 UTCJun 13, 09:20 UTC40m
2026-06-12 UZB423 - Jun 12, 21:35 UTCJun 13, 06:15 UTC8h 39m
2026-06-12 UZB613 TAS → VKO Jun 12, 17:50 UTCJun 12, 18:10 UTC20m

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 UK-78704 page for operator, model, and routing details .

Mode-S 507C54 frequently asked

What is Mode-S code 507C54?
507C54 is an ICAO 24-bit transponder address. Allocated to Uzbekistan. Assigned to UK-78704.
Where is Mode-S 507C54 registered?
Mode-S code 507C54 is allocated to Uzbekistan (UZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 507C54 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 507C54, octal 24076124, decimal 5,274,708.
What flights does 507C54 operate?
Mode-S 507C54 has broadcast 20 distinct callsigns, including UZB273, UZB271, UZB255, UZB274, UZB272.