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 1h ago
Flights observed
68
Distinct callsigns
20
Country
RU
Last broadcast
1h 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 - 6 2026-05-24
SVR093 Ural Airlines 5 2026-04-28
SVR628 Ural Airlines 4 2026-05-29
SVR321 Ural Airlines 4 2026-05-12
SVR627 Ural Airlines 3 2026-05-29
SVR2929 Ural Airlines 3 2026-05-27
SVR270 Ural Airlines 3 2026-04-26
SVR263 Ural Airlines 3 2026-04-29
SVR9384 - 2 2026-05-15
SVR624 Ural Airlines 2 2026-06-02
SVR274 Ural Airlines 2 2026-04-17
SVR2662 Ural Airlines 2 2026-04-26
SVR266 Ural Airlines 2 2026-05-19
SVR150 Ural Airlines 2 2026-05-15
SVR094 Ural Airlines 2 2026-04-29
SVR9851 - 1 2026-04-22
SVR9710 - 1 2026-04-24
SVR9309 - 1 2026-05-20
SVR392 Ural Airlines 1 2026-05-29
SVR391 Ural Airlines 1 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-02 SVR174 KHV → SVX Jun 2, 07:15 UTCJun 2, 13:45 UTC6h 30m
2026-05-31 SVR366 VVO → IKT May 31, 15:45 UTCJun 1, 08:30 UTC16h 45m
2026-05-29 SVR628 KGD → DME May 29, 18:40 UTCMay 30, 07:05 UTC12h 25m
2026-05-29 SVR391 LED → KGD May 29, 15:25 UTCMay 29, 16:35 UTC1h 10m
2026-05-29 SVR392 KGD → LED May 29, 13:00 UTCMay 29, 13:55 UTC55m
2026-05-29 SVR627 DME → KGD May 29, 10:05 UTCMay 29, 11:00 UTC55m
2026-05-27 SVR2929 KJA → DYU May 27, 22:45 UTCMay 28, 10:10 UTC11h 25m
2026-05-27 SVR2929 KJA → DYU May 27, 09:05 UTCMay 28, 06:30 UTC21h 25m
2026-05-27 SVR2929 KJA → DYU May 27, 08:15 UTCMay 28, 06:30 UTC22h 15m
2026-05-24 RA73803 - May 24, 14:25 UTCMay 24, 14:35 UTC10m
2026-05-23 RA73803 - May 23, 16:10 UTCMay 24, 09:50 UTC17h 40m
2026-05-20 SVR2930 DYU → KJA May 20, 21:45 UTCMay 21, 08:55 UTC11h 10m
2026-05-20 SVR9309 - May 20, 14:00 UTCMay 20, 14:10 UTC10m
2026-05-19 SVR266 SVX → DME May 19, 01:20 UTCMay 19, 15:20 UTC14h 0m
2026-05-17 SVR209 SVX → KRR May 17, 11:20 UTCMay 17, 12:20 UTC1h 0m
2026-05-15 SVR9384 - May 15, 19:15 UTCMay 16, 11:11 UTC15h 56m
2026-05-15 SVR9384 - May 15, 15:55 UTCMay 16, 11:11 UTC19h 16m
2026-05-15 SVR150 GDZ → SVX May 15, 08:10 UTCMay 15, 19:35 UTC11h 24m
2026-05-14 SVR150 GDZ → SVX May 14, 19:30 UTCMay 15, 16:05 UTC20h 34m
2026-05-13 SVR628 KGD → DME May 13, 18:00 UTCMay 13, 19:20 UTC1h 20m
2026-05-13 SVR627 DME → KGD May 13, 15:50 UTCMay 13, 16:25 UTC35m
2026-05-13 SVR272 SVX → DME May 13, 06:05 UTCMay 13, 06:15 UTC10m
2026-05-12 SVR321 SVX → AER May 12, 15:10 UTCMay 12, 15:40 UTC30m
2026-05-11 SVR210 KRR → SVX May 11, 06:15 UTCMay 11, 16:35 UTC10h 20m
2026-05-10 SVR115 DME → GDZ May 10, 07:15 UTCMay 10, 08:35 UTC1h 20m
2026-05-09 SVR262 SVX → DME May 9, 03:55 UTCMay 9, 04:45 UTC50m
2026-05-07 RA73803 - May 7, 14:30 UTCMay 7, 19:00 UTC4h 30m
2026-05-06 SVR220 AER → SVX May 6, 11:10 UTCMay 6, 11:25 UTC15m
2026-05-06 SVR219 SVX → AER May 6, 08:55 UTCMay 6, 09:05 UTC10m
2026-05-06 SVR2956 LBD → SVX May 6, 02:10 UTCMay 6, 02:20 UTC10m
2026-05-04 SVR266 SVX → DME May 4, 11:35 UTCMay 4, 15:20 UTC3h 45m
2026-05-03 SVR173 SVX → KHV May 3, 14:40 UTCMay 3, 15:00 UTC20m
2026-05-02 SVR206 MRV → SVX May 2, 15:45 UTCMay 2, 15:55 UTC10m
2026-05-01 SVR273 DME → SVX May 1, 06:55 UTCMay 1, 07:20 UTC25m
2026-04-29 SVR263 DME → SVX Apr 29, 17:55 UTCApr 30, 09:40 UTC15h 44m
2026-04-29 SVR110 KRR → DME Apr 29, 13:40 UTCApr 29, 13:55 UTC15m
2026-04-29 SVR094 HTA → DME Apr 29, 06:25 UTCApr 29, 06:35 UTC10m
2026-04-28 SVR093 DME → HTA Apr 28, 18:15 UTCApr 29, 03:19 UTC9h 5m
2026-04-28 SVR094 HTA → DME Apr 28, 05:25 UTCApr 29, 03:19 UTC21h 55m
2026-04-27 SVR093 DME → HTA Apr 27, 20:20 UTCApr 28, 18:25 UTC22h 5m
2026-04-27 SVR093 DME → HTA Apr 27, 18:15 UTCApr 28, 05:50 UTC11h 35m
2026-04-27 SVR093 DME → HTA Apr 27, 08:50 UTCApr 28, 05:50 UTC21h 0m
2026-04-27 SVR093 DME → HTA Apr 27, 08:30 UTCApr 28, 05:50 UTC21h 20m
2026-04-26 SVR270 SVX → DME Apr 26, 16:15 UTCApr 27, 08:50 UTC16h 35m
2026-04-26 SVR270 SVX → DME Apr 26, 12:10 UTCApr 27, 08:50 UTC20h 40m
2026-04-26 SVR2662 DYU → AER Apr 26, 03:50 UTCApr 26, 17:00 UTC13h 10m
2026-04-25 SVR2662 DYU → AER Apr 25, 21:55 UTCApr 26, 17:00 UTC19h 5m
2026-04-25 SVR321 SVX → AER Apr 25, 17:30 UTCApr 26, 16:45 UTC23h 15m

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 1h 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, SVR628, SVR321, SVR627.