Apparatus

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sensors Mode-S transponder

15203C

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73788 · AIRBUS A-330-300

Hex
15203C
Octal
05220074
Decimal
1,384,508
Country
RU
Tail
RA-73788
Type
A333
No current signal · last broadcast 1h ago
Flights observed
72
Distinct callsigns
20
Country
RU
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 15203C.

Country allocation

The ICAO 24-bit address 15203C falls within the block assigned to Russia (RU) by ICAO Annex 10, Volume III. Every aircraft registered in Russia 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
AFL628 Aeroflot Russian Airlines 7 2026-05-10
AFL629 Aeroflot Russian Airlines 6 2026-05-11
AFL627 Aeroflot Russian Airlines 6 2026-05-11
AFL733 Aeroflot Russian Airlines 5 2026-05-10
AFL233 Aeroflot Russian Airlines 5 2026-05-22
AFL831 Aeroflot Russian Airlines 4 2026-05-02
AFL1471 Aeroflot Russian Airlines 4 2026-05-26
AFL294 Aeroflot Russian Airlines 3 2026-04-25
AFL232 Aeroflot Russian Airlines 3 2026-05-19
AFL1411 Aeroflot Russian Airlines 3 2026-05-24
AFL830 Aeroflot Russian Airlines 2 2026-05-01
AFL654 Aeroflot Russian Airlines 2 2026-04-30
AFL651 Aeroflot Russian Airlines 2 2026-05-01
AFL650 Aeroflot Russian Airlines 2 2026-05-03
AFL598 Aeroflot Russian Airlines 2 2026-04-21
AFL298 - 2 2026-05-14
AFL293 Aeroflot Russian Airlines 2 2026-05-21
AFL292 Aeroflot Russian Airlines 2 2026-05-20
AFL7991 - 1 2026-05-04
AFL626 Aeroflot Russian Airlines 1 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AFL1552 SVO → OVB May 30, 12:15 UTCMay 30, 12:35 UTC20m
2026-05-27 AFL224 SVO → SYX May 27, 13:50 UTCMay 28, 03:40 UTC13h 50m
2026-05-26 AFL1471 SVX → SVO May 26, 16:45 UTCMay 26, 17:09 UTC25m
2026-05-26 AFL1471 SVX → SVO May 26, 09:35 UTCMay 26, 16:10 UTC6h 35m
2026-05-25 AFL1471 SVX → SVO May 25, 19:05 UTCMay 26, 16:10 UTC21h 5m
2026-05-25 AFL1471 SVX → SVO May 25, 18:40 UTCMay 26, 16:10 UTC21h 29m
2026-05-25 AFL1470 SVO → SVX May 25, 12:00 UTCMay 26, 10:10 UTC22h 9m
2026-05-24 AFL1411 SVX → SVO May 24, 08:50 UTCMay 24, 09:10 UTC20m
2026-05-24 AFL1411 SVX → SVO May 24, 01:20 UTCMay 24, 08:20 UTC7h 0m
2026-05-23 AFL1411 SVX → SVO May 23, 11:20 UTCMay 24, 08:20 UTC21h 0m
2026-05-22 AFL233 DEL → SVO May 22, 02:50 UTCMay 22, 07:50 UTC5h 0m
2026-05-21 AFL293 SGN → SVO May 21, 05:05 UTCMay 22, 00:30 UTC19h 25m
2026-05-21 AFL293 SGN → SVO May 21, 01:05 UTCMay 22, 00:30 UTC23h 25m
2026-05-20 AFL292 SVO → SGN May 20, 17:25 UTCMay 21, 06:25 UTC13h 0m
2026-05-20 AFL292 SVO → SGN May 20, 16:15 UTCMay 20, 16:50 UTC35m
2026-05-20 AFL233 DEL → SVO May 20, 09:15 UTCMay 20, 09:45 UTC30m
2026-05-20 AFL233 DEL → SVO May 20, 03:45 UTCMay 20, 04:25 UTC40m
2026-05-19 AFL232 SVO → DEL May 19, 07:15 UTCMay 20, 01:40 UTC18h 25m
2026-05-19 AFL233 DEL → SVO May 19, 03:05 UTCMay 20, 01:40 UTC22h 35m
2026-05-19 AFL233 DEL → SVO May 19, 02:50 UTCMay 20, 01:00 UTC22h 10m
2026-05-18 AFL232 SVO → DEL May 18, 23:45 UTCMay 19, 00:30 UTC45m
2026-05-18 AFL232 SVO → DEL May 18, 18:50 UTCMay 18, 19:25 UTC35m
2026-05-15 AFL299 CXR → SVO May 15, 01:25 UTCMay 15, 15:05 UTC13h 39m
2026-05-14 AFL298 - May 14, 05:15 UTCMay 15, 05:00 UTC23h 45m
2026-05-14 AFL298 - May 14, 03:05 UTCMay 15, 03:00 UTC23h 55m
2026-05-13 AFL225 SVO → ATH May 13, 13:31 UTCMay 14, 05:55 UTC16h 25m
2026-05-11 AFL629 HKT → LED May 11, 22:35 UTCMay 12, 09:55 UTC11h 21m
2026-05-11 AFL629 HKT → LED May 11, 13:45 UTCMay 12, 09:55 UTC20h 11m
2026-05-11 AFL627 HKT → SVX May 11, 09:15 UTCMay 12, 09:00 UTC23h 46m
2026-05-11 AFL627 HKT → SVX May 11, 07:45 UTCMay 11, 22:35 UTC14h 50m
2026-05-10 AFL627 HKT → SVX May 10, 23:05 UTCMay 11, 22:35 UTC23h 30m
2026-05-10 AFL627 HKT → SVX May 10, 22:20 UTCMay 11, 13:50 UTC15h 30m
2026-05-10 AFL628 LED → HKT May 10, 18:39 UTCMay 11, 13:50 UTC19h 10m
2026-05-10 AFL628 LED → HKT May 10, 11:05 UTCMay 11, 10:20 UTC23h 15m
2026-05-10 AFL733 HRG → LED May 10, 09:05 UTCMay 11, 08:25 UTC23h 20m
2026-05-10 AFL733 HRG → LED May 10, 05:04 UTCMay 11, 00:40 UTC19h 35m
2026-05-10 AFL733 HRG → LED May 10, 03:04 UTCMay 11, 00:40 UTC21h 35m
2026-05-10 AFL733 HRG → LED May 10, 02:45 UTCMay 11, 00:40 UTC21h 55m
2026-05-09 AFL629 HKT → LED May 9, 15:40 UTCMay 9, 15:50 UTC10m
2026-05-08 AFL628 LED → HKT May 8, 17:55 UTCMay 9, 09:40 UTC15h 45m
2026-05-08 AFL628 LED → HKT May 8, 16:40 UTCMay 8, 16:55 UTC15m
2026-05-07 AFL733 HRG → LED May 7, 05:10 UTCMay 7, 12:45 UTC7h 35m
2026-05-06 AFL040 SVO → LED May 6, 15:00 UTCMay 6, 16:05 UTC1h 5m
2026-05-04 AFL7991 - May 4, 20:30 UTCMay 5, 03:15 UTC6h 45m
2026-05-03 AFL650 OVB → BKK May 3, 02:55 UTCMay 3, 09:20 UTC6h 24m
2026-05-02 AFL831 CXR → OVB May 2, 09:25 UTCMay 3, 00:20 UTC14h 55m
2026-05-02 AFL831 CXR → OVB May 2, 02:45 UTCMay 3, 00:20 UTC21h 35m
2026-05-01 AFL830 OVB → CXR May 1, 14:10 UTCMay 2, 09:50 UTC19h 40m
2026-05-01 AFL651 BKK → OVB May 1, 03:40 UTCMay 1, 10:00 UTC6h 20m
2026-04-30 AFL654 KHV → BKK Apr 30, 09:05 UTCMay 1, 00:50 UTC15h 45m

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 RA-73788 page for operator, model, and routing details .

Mode-S 15203C frequently asked

What is Mode-S code 15203C?
15203C is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73788.
Where is Mode-S 15203C registered?
Mode-S code 15203C is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 15203C broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 15203C, octal 05220074, decimal 1,384,508.
What flights does 15203C operate?
Mode-S 15203C has broadcast 20 distinct callsigns, including AFL628, AFL629, AFL627, AFL733, AFL233.