Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

15204C

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73804 · AIRBUS A-320

Hex
15204C
Octal
05220114
Decimal
1,384,524
Country
RU
Tail
RA-73804
Type
A320
No current signal · last broadcast 1d ago
Flights observed
58
Distinct callsigns
20
Country
RU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 15204C.

Country allocation

The ICAO 24-bit address 15204C 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
SVR270 Ural Airlines 5 2026-05-25
SVR266 Ural Airlines 5 2026-05-05
SVR628 Ural Airlines 4 2026-05-16
SVR321 Ural Airlines 4 2026-05-14
SVR105 Ural Airlines 4 2026-05-01
SVR624 Ural Airlines 3 2026-05-09
SVR271 Ural Airlines 3 2026-05-22
SVR220 Ural Airlines 3 2026-05-19
SVR219 Ural Airlines 3 2026-05-15
SVR9166 - 2 2026-05-11
SVR627 Ural Airlines 2 2026-04-15
SVR392 Ural Airlines 2 2026-05-22
SVR280 Ural Airlines 2 2026-04-17
RA73804 - 2 2026-05-25
SVR9138 - 1 2026-05-27
SVR9137 - 1 2026-05-29
SVR623 Ural Airlines 1 2026-05-09
SVR391 Ural Airlines 1 2026-05-03
SVR387 - 1 2026-04-13
SVR366 Ural Airlines 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SVR9137 - May 29, 01:30 UTCMay 29, 02:15 UTC45m
2026-05-27 SVR9138 - May 27, 08:00 UTCMay 27, 22:10 UTC14h 10m
2026-05-26 SVR366 VVO → IKT May 26, 10:29 UTCMay 27, 08:40 UTC22h 11m
2026-05-25 SVR270 SVX → DME May 25, 16:55 UTCMay 26, 10:39 UTC17h 45m
2026-05-25 SVR270 SVX → DME May 25, 12:25 UTCMay 26, 10:39 UTC22h 14m
2026-05-25 RA73804 - May 25, 06:00 UTCMay 25, 06:55 UTC55m
2026-05-24 RA73804 - May 24, 10:50 UTCMay 25, 06:55 UTC20h 5m
2026-05-24 SVR094 HTA → DME May 24, 06:25 UTCMay 24, 07:10 UTC45m
2026-05-22 SVR271 DME → SVX May 22, 22:30 UTCMay 22, 22:45 UTC15m
2026-05-22 SVR192 LED → DME May 22, 20:55 UTCMay 22, 21:05 UTC10m
2026-05-22 SVR392 KGD → LED May 22, 11:50 UTCMay 22, 12:40 UTC50m
2026-05-20 SVR205 SVX → MRV May 20, 10:35 UTCMay 20, 11:35 UTC1h 0m
2026-05-19 SVR220 AER → SVX May 19, 11:40 UTCMay 19, 17:25 UTC5h 45m
2026-05-18 SVR220 AER → SVX May 18, 15:10 UTCMay 19, 12:35 UTC21h 24m
2026-05-18 SVR220 AER → SVX May 18, 14:45 UTCMay 19, 12:35 UTC21h 49m
2026-05-18 SVR272 SVX → DME May 18, 05:30 UTCMay 18, 06:01 UTC30m
2026-05-16 SVR628 KGD → DME May 16, 12:45 UTCMay 16, 21:25 UTC8h 40m
2026-05-15 SVR628 KGD → DME May 15, 16:25 UTCMay 16, 14:16 UTC21h 51m
2026-05-15 SVR219 SVX → AER May 15, 07:20 UTCMay 15, 17:05 UTC9h 44m
2026-05-14 SVR219 SVX → AER May 14, 18:05 UTCMay 15, 17:00 UTC22h 54m
2026-05-14 SVR321 SVX → AER May 14, 14:15 UTCMay 15, 08:20 UTC18h 5m
2026-05-14 SVR321 SVX → AER May 14, 09:20 UTCMay 15, 08:20 UTC23h 0m
2026-05-14 SVR321 SVX → AER May 14, 03:05 UTCMay 14, 19:00 UTC15h 55m
2026-05-13 SVR321 SVX → AER May 13, 17:05 UTCMay 14, 15:15 UTC22h 10m
2026-05-11 SVR9166 - May 11, 13:05 UTCMay 12, 08:05 UTC19h 1m
2026-05-10 SVR9166 - May 10, 17:34 UTCMay 11, 16:05 UTC22h 30m
2026-05-09 SVR623 HTA → SVX May 9, 23:05 UTCMay 10, 17:55 UTC18h 50m
2026-05-09 SVR624 SVX → HTA May 9, 22:39 UTCMay 10, 17:55 UTC19h 15m
2026-05-09 SVR624 SVX → HTA May 9, 16:05 UTCMay 9, 18:20 UTC2h 15m
2026-05-09 SVR174 KHV → SVX May 9, 12:40 UTCMay 9, 13:15 UTC35m
2026-05-08 SVR2890 OSS → SVX May 8, 03:44 UTCMay 8, 03:55 UTC10m
2026-05-05 SVR266 SVX → DME May 5, 16:20 UTCMay 5, 21:35 UTC5h 15m
2026-05-04 SVR266 SVX → DME May 4, 17:50 UTCMay 5, 17:00 UTC23h 11m
2026-05-04 SVR624 SVX → HTA May 4, 16:20 UTCMay 4, 16:40 UTC20m
2026-05-04 SVR392 KGD → LED May 4, 11:05 UTCMay 4, 11:50 UTC45m
2026-05-03 SVR391 LED → KGD May 3, 17:00 UTCMay 4, 09:00 UTC16h 0m
2026-05-01 SVR105 DME → IKT May 1, 18:15 UTCMay 2, 02:00 UTC7h 45m
2026-05-01 SVR105 DME → IKT May 1, 01:20 UTCMay 1, 20:55 UTC19h 35m
2026-04-30 SVR106 IKT → DME Apr 30, 23:55 UTCMay 1, 00:05 UTC10m
2026-04-30 SVR105 DME → IKT Apr 30, 01:20 UTCApr 30, 20:40 UTC19h 20m
2026-04-29 SVR105 DME → IKT Apr 29, 17:05 UTCApr 30, 02:05 UTC8h 59m
2026-04-27 SVR270 SVX → DME Apr 27, 16:05 UTCApr 27, 16:50 UTC45m
2026-04-27 SVR219 SVX → AER Apr 27, 09:00 UTCApr 27, 09:25 UTC25m
2026-04-26 SVR266 SVX → DME Apr 26, 05:40 UTCApr 26, 16:45 UTC11h 5m
2026-04-25 SVR266 SVX → DME Apr 25, 19:05 UTCApr 26, 16:45 UTC21h 40m
2026-04-25 SVR273 DME → SVX Apr 25, 08:50 UTCApr 26, 05:40 UTC20h 50m
2026-04-24 SVR270 SVX → DME Apr 24, 16:00 UTCApr 25, 09:00 UTC17h 0m
2026-04-21 SVR271 DME → SVX Apr 21, 21:25 UTCApr 21, 23:00 UTC1h 35m
2026-04-19 SVR266 SVX → DME Apr 19, 14:00 UTCApr 19, 14:10 UTC10m
2026-04-17 SVR280 AER → DME Apr 17, 14:45 UTCApr 17, 15:00 UTC14m

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-73804 page for operator, model, and routing details .

Mode-S 15204C frequently asked

What is Mode-S code 15204C?
15204C is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73804.
Where is Mode-S 15204C registered?
Mode-S code 15204C is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 15204C 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 15204C, octal 05220114, decimal 1,384,524.
What flights does 15204C operate?
Mode-S 15204C has broadcast 20 distinct callsigns, including SVR270, SVR266, SVR628, SVR321, SVR105.