Apparatus

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sensors Mode-S transponder

151DF9

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73209 · BOEING 737-800

Hex
151DF9
Octal
05216771
Decimal
1,383,929
Country
RU
Tail
RA-73209
Type
B738
No current signal · last broadcast Jul 26, 16:55 UTC
Flights observed
233
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 16:55 UTC

Last known position

Most recent position reported by Mode-S 151DF9.

Country allocation

The ICAO 24-bit address 151DF9 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
SDM5954 Rossiya - Russian Airlines 27 2026-07-25
SDM5978 Rossiya - Russian Airlines 24 2026-07-20
SDM5974 Rossiya - Russian Airlines 24 2026-07-24
SDM5972 - 23 2026-07-03
SDM6953 Rossiya - Russian Airlines 11 2026-07-19
SDM5980 - 11 2026-07-02
SDM6954 Rossiya - Russian Airlines 9 2026-07-19
SDM5976 Rossiya - Russian Airlines 9 2026-05-31
SDM5964 Rossiya - Russian Airlines 9 2026-07-21
SDM5963 - 9 2026-07-12
SDM5956 Rossiya - Russian Airlines 8 2026-07-26
SDM5973 - 7 2026-07-01
SDM5966 Rossiya - Russian Airlines 5 2026-05-30
SDM6002 Rossiya - Russian Airlines 4 2026-05-19
SDM5977 Rossiya - Russian Airlines 4 2026-07-20
SDM5962 Rossiya - Russian Airlines 4 2026-06-02
SDM5955 Rossiya - Russian Airlines 4 2026-07-26
SDM5953 - 4 2026-07-11
SDM6312 - 3 2026-07-07
SDM6310 Rossiya - Russian Airlines 3 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SDM5956 SSH → SVO Jul 26, 14:15 UTCJul 26, 16:55 UTC2h 40m
2026-07-26 SDM5955 SVO → SSH Jul 26, 09:05 UTCJul 26, 11:50 UTC2h 45m
2026-07-26 SDM5955 SVO → SSH Jul 26, 05:55 UTCJul 26, 06:15 UTC20m
2026-07-25 SDM5954 HRG → SVO Jul 25, 03:15 UTCJul 25, 21:25 UTC18h 10m
2026-07-25 SDM5954 HRG → SVO Jul 25, 00:20 UTCJul 25, 21:25 UTC21h 5m
2026-07-24 SDM5954 HRG → SVO Jul 24, 23:15 UTCJul 25, 21:25 UTC22h 10m
2026-07-24 SDM5974 HRG → UFA Jul 24, 10:35 UTCJul 25, 05:40 UTC19h 5m
2026-07-24 SDM5974 HRG → UFA Jul 24, 06:35 UTCJul 25, 05:40 UTC23h 5m
2026-07-23 SDM5974 HRG → UFA Jul 23, 20:05 UTCJul 24, 13:00 UTC16h 55m
2026-07-23 SDM5974 HRG → UFA Jul 23, 16:45 UTCJul 24, 13:00 UTC20h 15m
2026-07-21 SDM5964 HRG → KUF Jul 21, 21:20 UTCJul 22, 16:00 UTC18h 40m
2026-07-21 SDM5964 HRG → KUF Jul 21, 18:20 UTCJul 22, 16:00 UTC21h 40m
2026-07-21 SDM5964 HRG → KUF Jul 21, 17:05 UTCJul 22, 16:00 UTC22h 55m
2026-07-21 SDM5974 HRG → UFA Jul 21, 05:05 UTCJul 21, 23:50 UTC18h 45m
2026-07-21 SDM5974 HRG → UFA Jul 21, 02:20 UTCJul 21, 23:50 UTC21h 30m
2026-07-21 SDM5974 HRG → UFA Jul 21, 01:05 UTCJul 21, 23:50 UTC22h 45m
2026-07-20 SDM5977 CEK → HRG Jul 20, 10:20 UTCJul 21, 06:20 UTC20h 0m
2026-07-20 SDM5978 HRG → CEK Jul 20, 08:20 UTCJul 21, 06:20 UTC22h 0m
2026-07-20 SDM5978 HRG → CEK Jul 20, 08:05 UTCJul 21, 06:15 UTC22h 9m
2026-07-20 SDM5978 HRG → CEK Jul 20, 04:20 UTCJul 21, 02:35 UTC22h 15m
2026-07-20 SDM5978 HRG → CEK Jul 20, 04:00 UTCJul 21, 02:15 UTC22h 14m
2026-07-19 SDM5978 HRG → CEK Jul 19, 10:20 UTCJul 20, 10:15 UTC23h 55m
2026-07-19 SDM6954 VKO → LED Jul 19, 08:40 UTCJul 20, 08:15 UTC23h 35m
2026-07-19 SDM6953 LED → VKO Jul 19, 05:50 UTCJul 19, 07:00 UTC1h 10m
2026-07-18 SDM6953 LED → VKO Jul 18, 09:45 UTCJul 19, 07:00 UTC21h 15m
2026-07-18 SDM6953 LED → VKO Jul 18, 06:35 UTCJul 18, 08:15 UTC1h 40m
2026-07-15 SDM6954 - Jul 15, 09:00 UTCJul 15, 10:40 UTC1h 40m
2026-07-15 SDM6953 - Jul 15, 05:45 UTCJul 15, 07:15 UTC1h 30m
2026-07-14 SDM6954 - Jul 14, 08:55 UTCJul 14, 17:35 UTC8h 40m
2026-07-13 SDM6152 KGD → SVO Jul 13, 12:20 UTCJul 14, 07:25 UTC19h 5m
2026-07-13 SDM6152 KGD → SVO Jul 13, 11:55 UTCJul 14, 07:25 UTC19h 30m
2026-07-12 SDM5963 - Jul 12, 14:40 UTCJul 13, 10:00 UTC19h 20m
2026-07-11 SDM5963 - Jul 11, 22:40 UTCJul 12, 20:10 UTC21h 30m
2026-07-11 SDM5963 - Jul 11, 18:20 UTCJul 12, 16:10 UTC21h 50m
2026-07-11 SDM5977 - Jul 11, 18:10 UTCJul 12, 16:10 UTC22h 0m
2026-07-11 SDM5978 - Jul 11, 06:05 UTCJul 11, 23:45 UTC17h 40m
2026-07-11 SDM5978 - Jul 11, 02:20 UTCJul 11, 23:45 UTC21h 25m
2026-07-11 SDM5953 - Jul 11, 01:05 UTCJul 11, 23:45 UTC22h 40m
2026-07-10 SDM6309 - Jul 10, 06:55 UTCJul 10, 07:30 UTC35m
2026-07-09 SDM6954 - Jul 9, 10:20 UTCJul 10, 07:30 UTC21h 10m
2026-07-09 SDM6954 - Jul 9, 09:05 UTCJul 10, 07:30 UTC22h 25m
2026-07-09 SDM6953 - Jul 9, 05:55 UTCJul 9, 07:30 UTC1h 35m
2026-07-09 SDM6953 SVO → SVO Jul 9, 02:55 UTCJul 9, 03:25 UTC30m
2026-07-08 SDM6954 - Jul 8, 08:25 UTCJul 8, 10:10 UTC1h 45m
2026-07-07 SDM6312 - Jul 7, 19:20 UTCJul 8, 07:00 UTC11h 40m
2026-07-07 SDM6312 - Jul 7, 08:35 UTCJul 8, 07:00 UTC22h 25m
2026-07-07 SDM6953 - Jul 7, 06:45 UTCJul 7, 07:20 UTC35m
2026-07-06 SDM6953 - Jul 6, 10:20 UTCJul 7, 07:20 UTC21h 0m
2026-07-06 SDM6954 - Jul 6, 08:35 UTCJul 7, 07:20 UTC22h 45m
2026-07-06 SDM6953 - Jul 6, 06:20 UTCJul 6, 07:05 UTC45m

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-73209 page for operator, model, and routing details .

Mode-S 151DF9 frequently asked

What is Mode-S code 151DF9?
151DF9 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73209.
Where is Mode-S 151DF9 registered?
Mode-S code 151DF9 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DF9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DF9, octal 05216771, decimal 1,383,929.
What flights does 151DF9 operate?
Mode-S 151DF9 has broadcast 20 distinct callsigns, including SDM5954, SDM5978, SDM5974, SDM5972, SDM6953.