Apparatus

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sensors Mode-S transponder

151DFB

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73211 · BOEING 737-800

Hex
151DFB
Octal
05216773
Decimal
1,383,931
Country
RU
Tail
RA-73211
Type
B738
No current signal · last broadcast 1h ago
Flights observed
166
Distinct callsigns
20
Country
RU
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 151DFB.

Country allocation

The ICAO 24-bit address 151DFB 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
SDM5972 Rossiya - Russian Airlines 26 2026-05-29
SDM5978 Rossiya - Russian Airlines 24 2026-05-25
SDM5974 Rossiya - Russian Airlines 18 2026-05-22
SDM5980 Rossiya - Russian Airlines 14 2026-05-21
SDM5973 Rossiya - Russian Airlines 13 2026-05-26
SDM5954 Rossiya - Russian Airlines 10 2026-05-30
SDM5964 Rossiya - Russian Airlines 9 2026-05-20
SDM5955 Rossiya - Russian Airlines 8 2026-06-02
SDM5977 Rossiya - Russian Airlines 5 2026-06-02
SDM5956 Rossiya - Russian Airlines 5 2026-05-31
SDM5971 Rossiya - Russian Airlines 4 2026-05-30
SDM5970 Rossiya - Russian Airlines 4 2026-04-19
SDM5976 Rossiya - Russian Airlines 3 2026-04-20
SDM5968 Rossiya - Russian Airlines 3 2026-04-20
SDM5963 Rossiya - Russian Airlines 3 2026-05-28
SDM5962 Rossiya - Russian Airlines 3 2026-04-21
SDM5967 Rossiya - Russian Airlines 2 2026-04-20
SDM5966 - 2 2026-04-14
SDM5965 Rossiya - Russian Airlines 2 2026-04-15
SDM5961 Rossiya - Russian Airlines 2 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 SDM5955 SVO → SSH Jun 2, 16:25 UTCJun 2, 18:40 UTC2h 15m
2026-06-02 SDM5955 SVO → SSH Jun 2, 13:00 UTCJun 2, 13:30 UTC30m
2026-06-02 SDM5977 CEK → HRG Jun 2, 00:35 UTCJun 2, 08:20 UTC7h 45m
2026-06-01 SDM5977 CEK → HRG Jun 1, 08:50 UTCJun 2, 08:20 UTC23h 30m
2026-06-01 SDM5977 CEK → HRG Jun 1, 08:00 UTCJun 2, 06:45 UTC22h 45m
2026-06-01 SDM5977 CEK → HRG Jun 1, 04:50 UTCJun 2, 03:15 UTC22h 25m
2026-06-01 SDM5953 SVO → HRG Jun 1, 03:05 UTCJun 2, 02:45 UTC23h 40m
2026-05-31 SDM5956 SSH → SVO May 31, 15:10 UTCJun 1, 09:20 UTC18h 10m
2026-05-30 SDM5954 HRG → SVO May 30, 20:40 UTCMay 31, 13:00 UTC16h 20m
2026-05-30 SDM5954 HRG → SVO May 30, 16:50 UTCMay 31, 13:00 UTC20h 10m
2026-05-30 SDM5954 HRG → SVO May 30, 15:15 UTCMay 31, 13:00 UTC21h 45m
2026-05-30 SDM5971 PEE → HRG May 30, 12:00 UTCMay 30, 23:25 UTC11h 25m
2026-05-29 SDM5972 HRG → PEE May 29, 22:10 UTCMay 30, 06:00 UTC7h 50m
2026-05-28 SDM5963 KUF → HRG May 28, 11:15 UTCMay 28, 21:45 UTC10h 30m
2026-05-26 SDM5973 UFA → HRG May 26, 22:05 UTCMay 27, 16:05 UTC18h 1m
2026-05-26 SDM5973 UFA → HRG May 26, 18:50 UTCMay 27, 16:05 UTC21h 16m
2026-05-26 SDM5973 UFA → HRG May 26, 17:04 UTCMay 27, 16:05 UTC23h 1m
2026-05-26 SDM5971 PEE → HRG May 26, 14:00 UTCMay 27, 11:00 UTC21h 0m
2026-05-25 SDM5977 CEK → HRG May 25, 10:50 UTCMay 26, 06:39 UTC19h 50m
2026-05-25 SDM5978 HRG → CEK May 25, 08:50 UTCMay 26, 06:39 UTC21h 49m
2026-05-25 SDM5978 HRG → CEK May 25, 08:20 UTCMay 26, 06:39 UTC22h 19m
2026-05-25 SDM5978 HRG → CEK May 25, 04:50 UTCMay 26, 02:49 UTC21h 59m
2026-05-25 SDM5978 HRG → CEK May 25, 03:50 UTCMay 26, 02:44 UTC22h 54m
2026-05-23 SDM5973 UFA → HRG May 23, 07:05 UTCMay 23, 20:00 UTC12h 56m
2026-05-22 SDM5973 UFA → HRG May 22, 22:50 UTCMay 23, 20:00 UTC21h 10m
2026-05-22 SDM5974 HRG → UFA May 22, 21:55 UTCMay 23, 20:00 UTC22h 5m
2026-05-22 SDM5974 HRG → UFA May 22, 18:50 UTCMay 23, 17:30 UTC22h 40m
2026-05-22 SDM5974 HRG → UFA May 22, 17:55 UTCMay 23, 13:50 UTC19h 54m
2026-05-21 SDM5979 GOJ → HRG May 21, 20:55 UTCMay 22, 19:25 UTC22h 30m
2026-05-21 SDM5980 HRG → GOJ May 21, 19:10 UTCMay 22, 18:45 UTC23h 35m
2026-05-21 SDM5980 HRG → GOJ May 21, 13:35 UTCMay 21, 22:05 UTC8h 30m
2026-05-20 SDM5963 KUF → HRG May 20, 16:50 UTCMay 21, 16:10 UTC23h 20m
2026-05-20 SDM5964 HRG → KUF May 20, 14:50 UTCMay 21, 14:45 UTC23h 55m
2026-05-19 SDM5973 UFA → HRG May 19, 22:50 UTCMay 20, 17:05 UTC18h 16m
2026-05-19 SDM5973 UFA → HRG May 19, 21:50 UTCMay 20, 17:05 UTC19h 16m
2026-05-19 SDM5973 UFA → HRG May 19, 18:50 UTCMay 20, 17:05 UTC22h 16m
2026-05-19 SDM5973 UFA → HRG May 19, 16:50 UTCMay 20, 16:45 UTC23h 56m
2026-05-19 SDM5973 UFA → HRG May 19, 13:25 UTCMay 20, 10:40 UTC21h 16m
2026-05-18 SDM5972 HRG → PEE May 18, 22:55 UTCMay 19, 09:20 UTC10h 25m
2026-05-18 SDM5972 HRG → PEE May 18, 12:50 UTCMay 19, 09:20 UTC20h 29m
2026-05-18 SDM5972 HRG → PEE May 18, 11:10 UTCMay 19, 09:20 UTC22h 9m
2026-05-18 SDM5978 HRG → CEK May 18, 09:35 UTCMay 19, 08:45 UTC23h 9m
2026-05-18 SDM5978 HRG → CEK May 18, 04:51 UTCMay 19, 02:50 UTC21h 59m
2026-05-17 SDM5978 HRG → CEK May 17, 16:50 UTCMay 18, 13:10 UTC20h 20m
2026-05-17 SDM5978 HRG → CEK May 17, 15:50 UTCMay 18, 13:10 UTC21h 20m
2026-05-16 SDM5954 HRG → SVO May 16, 19:20 UTCMay 17, 13:45 UTC18h 25m
2026-05-16 SDM5954 HRG → SVO May 16, 12:50 UTCMay 17, 12:45 UTC23h 55m
2026-05-16 SDM5972 HRG → PEE May 16, 07:41 UTCMay 17, 02:25 UTC18h 45m
2026-05-16 SDM5972 HRG → PEE May 16, 04:50 UTCMay 17, 02:25 UTC21h 35m
2026-05-16 SDM5972 HRG → PEE May 16, 03:55 UTCMay 17, 02:25 UTC22h 30m

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-73211 page for operator, model, and routing details .

Mode-S 151DFB frequently asked

What is Mode-S code 151DFB?
151DFB is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73211.
Where is Mode-S 151DFB registered?
Mode-S code 151DFB is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DFB 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 151DFB, octal 05216773, decimal 1,383,931.
What flights does 151DFB operate?
Mode-S 151DFB has broadcast 20 distinct callsigns, including SDM5972, SDM5978, SDM5974, SDM5980, SDM5973.