Apparatus

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sensors Mode-S transponder

507C4D

ICAO 24-bit transponder address · allocated to Uzbekistan

Currently assigned to UK-78702 · BOEING 787-8 Dreamliner

Hex
507C4D
Octal
24076115
Decimal
5,274,701
Country
UZ
Tail
UK-78702
Type
B788
No current signal · last broadcast 1d ago
Flights observed
6
Distinct callsigns
3
Country
UZ
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 507C4D.

Country allocation

The ICAO 24-bit address 507C4D 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 3 distinct

Callsign Airline Flights Last seen
UZB554 Uzbekistan Airways 4 2026-04-13
UZB553 - 1 2026-04-13
UZB511 - 1 2026-04-13

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-13 UZB511 - Apr 13, 22:40 UTCApr 13, 23:00 UTC20m
2026-04-13 UZB554 KUL → TAS Apr 13, 08:20 UTCApr 13, 09:25 UTC1h 5m
2026-04-13 UZB554 KUL → TAS Apr 13, 07:55 UTCApr 13, 09:25 UTC1h 30m
2026-04-13 UZB554 KUL → TAS Apr 13, 06:45 UTCApr 13, 08:15 UTC1h 30m
2026-04-13 UZB554 KUL → TAS Apr 13, 04:20 UTCApr 13, 04:30 UTC10m
2026-04-13 UZB553 - Apr 13, 01:20 UTCApr 13, 01:40 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-78702 page for operator, model, and routing details .

Mode-S 507C4D frequently asked

What is Mode-S code 507C4D?
507C4D is an ICAO 24-bit transponder address. Allocated to Uzbekistan. Assigned to UK-78702.
Where is Mode-S 507C4D registered?
Mode-S code 507C4D is allocated to Uzbekistan (UZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 507C4D broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 507C4D, octal 24076115, decimal 5,274,701.
What flights does 507C4D operate?
Mode-S 507C4D has broadcast 3 distinct callsigns, including UZB554, UZB553, UZB511.