Apparatus

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sensors Mode-S transponder

15204B

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73803 · AIRBUS A-320

Hex
15204B
Octal
05220113
Decimal
1,384,523
Country
RU
Tail
RA-73803
Type
A320
No current signal · last broadcast 3h ago
Flights observed
116
Distinct callsigns
20
Country
RU
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 15204B.

Country allocation

The ICAO 24-bit address 15204B 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
RA73803 - 13 2026-07-05
SVR093 - 6 2026-07-16
SVR627 - 5 2026-07-13
SVR628 Ural Airlines 4 2026-05-29
SVR624 - 4 2026-06-19
SVR321 Ural Airlines 4 2026-05-12
SVR150 Ural Airlines 4 2026-06-06
SVR105 - 4 2026-07-17
SVR9138 - 3 2026-06-11
SVR2929 Ural Airlines 3 2026-05-27
SVR274 - 3 2026-07-04
SVR270 Ural Airlines 3 2026-04-26
SVR263 Ural Airlines 3 2026-04-29
SVR174 - 3 2026-06-30
SVR9384 - 2 2026-05-15
SVR9169 - 2 2026-06-08
SVR392 - 2 2026-06-25
SVR391 - 2 2026-06-25
SVR2662 Ural Airlines 2 2026-04-26
SVR266 Ural Airlines 2 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 SVR105 - Jul 17, 20:04 UTCJul 17, 23:14 UTC3h 10m
2026-07-17 SVR1344 MCX → DME Jul 17, 16:55 UTCJul 17, 17:09 UTC15m
2026-07-17 SVR1343 DME → MCX Jul 17, 10:55 UTCJul 17, 11:35 UTC40m
2026-07-16 SVR093 - Jul 16, 20:39 UTCJul 17, 08:04 UTC11h 25m
2026-07-15 SVR261 - Jul 15, 08:00 UTCJul 15, 09:20 UTC1h 20m
2026-07-14 SVR105 - Jul 14, 18:10 UTCJul 15, 05:10 UTC10h 59m
2026-07-14 SVR105 - Jul 14, 06:10 UTCJul 15, 04:45 UTC22h 34m
2026-07-13 SVR105 - Jul 13, 21:25 UTCJul 14, 20:45 UTC23h 20m
2026-07-13 SVR627 - Jul 13, 10:35 UTCJul 13, 11:50 UTC1h 15m
2026-07-11 SVR1333 - Jul 11, 03:05 UTCJul 11, 05:45 UTC2h 40m
2026-07-08 SVR106 - Jul 8, 04:55 UTCJul 8, 05:35 UTC40m
2026-07-07 SVR106 - Jul 7, 10:15 UTCJul 8, 05:35 UTC19h 20m
2026-07-05 RA73803 - Jul 5, 10:35 UTCJul 5, 11:05 UTC30m
2026-07-04 SVR627 - Jul 4, 16:00 UTCJul 4, 16:40 UTC40m
2026-07-04 SVR274 - Jul 4, 12:40 UTCJul 4, 12:55 UTC15m
2026-07-03 SVR173 - Jul 3, 16:00 UTCJul 3, 16:15 UTC15m
2026-07-03 SVR2642 - Jul 3, 07:25 UTCJul 3, 07:35 UTC10m
2026-07-03 SVR2642 - Jul 3, 05:45 UTCJul 3, 05:55 UTC10m
2026-07-01 SVR2641 LED → LBD Jul 1, 17:10 UTCJul 1, 17:30 UTC20m
2026-06-30 SVR174 - Jun 30, 14:55 UTCJun 30, 15:10 UTC15m
2026-06-27 SVR1334 - Jun 27, 10:19 UTCJun 27, 10:34 UTC15m
2026-06-25 SVR156 - Jun 25, 15:54 UTCJun 26, 09:45 UTC17h 50m
2026-06-25 SVR2879 - Jun 25, 14:09 UTCJun 26, 09:45 UTC19h 35m
2026-06-25 SVR392 - Jun 25, 10:25 UTCJun 25, 11:35 UTC1h 10m
2026-06-25 SVR391 - Jun 25, 07:49 UTCJun 25, 08:40 UTC50m
2026-06-23 SVR209 - Jun 23, 12:35 UTCJun 23, 23:34 UTC11h 0m
2026-06-21 RA73803 - Jun 21, 09:29 UTCJun 21, 13:04 UTC3h 35m
2026-06-19 SVR624 - Jun 19, 00:45 UTCJun 19, 15:44 UTC15h 0m
2026-06-18 SVR624 - Jun 18, 09:25 UTCJun 19, 07:25 UTC21h 59m
2026-06-16 SVR1338 KEJ → AER Jun 16, 04:05 UTCJun 16, 10:00 UTC5h 55m
2026-06-16 SVR1337 AER → KEJ Jun 16, 02:04 UTCJun 16, 02:40 UTC35m
2026-06-13 SVR2990 DYU → KZN Jun 13, 10:35 UTCJun 13, 10:50 UTC15m
2026-06-11 SVR9138 - Jun 11, 17:25 UTCJun 12, 02:30 UTC9h 6m
2026-06-11 SVR9138 - Jun 11, 05:35 UTCJun 12, 02:30 UTC20h 55m
2026-06-10 SVR9138 - Jun 10, 23:30 UTCJun 11, 20:40 UTC21h 10m
2026-06-10 SVR174 KHV → SVX Jun 10, 16:00 UTCJun 10, 16:10 UTC10m
2026-06-09 RA73803 - Jun 9, 17:15 UTCJun 10, 10:10 UTC16h 55m
2026-06-09 RA73803 - Jun 9, 13:40 UTCJun 10, 10:10 UTC20h 30m
2026-06-09 RA73803 - Jun 9, 10:50 UTCJun 10, 10:10 UTC23h 20m
2026-06-09 RA73803 - Jun 9, 10:20 UTCJun 10, 02:20 UTC16h 0m
2026-06-08 RA73803 - Jun 8, 19:55 UTCJun 9, 17:55 UTC22h 0m
2026-06-08 SVR9169 - Jun 8, 17:50 UTCJun 9, 14:00 UTC20h 10m
2026-06-08 SVR9169 - Jun 8, 03:50 UTCJun 8, 20:35 UTC16h 45m
2026-06-06 SVR150 GDZ → SVX Jun 6, 08:00 UTCJun 6, 08:45 UTC45m
2026-06-05 SVR150 GDZ → SVX Jun 5, 09:45 UTCJun 6, 08:45 UTC23h 0m
2026-06-04 SVR265 DME → SVX Jun 4, 16:45 UTCJun 5, 10:00 UTC17h 15m
2026-06-04 SVR220 AER → SVX Jun 4, 10:50 UTCJun 4, 11:25 UTC35m
2026-06-04 SVR219 SVX → AER Jun 4, 07:30 UTCJun 4, 08:35 UTC1h 5m
2026-06-02 SVR624 SVX → HTA Jun 2, 18:10 UTCJun 2, 18:25 UTC15m
2026-06-02 SVR624 SVX → HTA Jun 2, 16:40 UTCJun 2, 17:00 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 RA-73803 page for operator, model, and routing details .

Mode-S 15204B frequently asked

What is Mode-S code 15204B?
15204B is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73803.
Where is Mode-S 15204B registered?
Mode-S code 15204B is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 15204B broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 15204B, octal 05220113, decimal 1,384,523.
What flights does 15204B operate?
Mode-S 15204B has broadcast 20 distinct callsigns, including RA73803, SVR093, SVR627, SVR628, SVR624.