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 Jul 26, 22:25 UTC
Flights observed
287
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 22:25 UTC

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 35 2026-07-18
SDM5978 - 31 2026-07-13
SDM5974 - 22 2026-07-17
SDM5954 Rossiya - Russian Airlines 17 2026-07-21
SDM5956 - 16 2026-07-19
SDM5980 Rossiya - Russian Airlines 14 2026-05-21
SDM5973 Rossiya - Russian Airlines 13 2026-05-26
SDM5964 - 13 2026-07-14
SDM5970 Rossiya - Russian Airlines 12 2026-07-26
SDM5962 Rossiya - Russian Airlines 12 2026-07-23
SDM5976 Rossiya - Russian Airlines 9 2026-07-26
SDM5968 Rossiya - Russian Airlines 9 2026-07-24
SDM5966 Rossiya - Russian Airlines 9 2026-07-21
SDM6953 - 8 2026-07-12
SDM5967 - 8 2026-07-04
SDM5955 Rossiya - Russian Airlines 8 2026-06-02
SDM6954 Rossiya - Russian Airlines 7 2026-07-20
SDM5969 Rossiya - Russian Airlines 6 2026-07-23
SDM5965 Rossiya - Russian Airlines 6 2026-07-25
SDM5977 Rossiya - Russian Airlines 5 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SDM5976 SSH → UFA Jul 26, 21:05 UTCJul 26, 22:25 UTC1h 20m
2026-07-26 SDM5970 SSH → PEE Jul 26, 05:35 UTCJul 26, 18:35 UTC13h 1m
2026-07-25 SDM5965 GOJ → SSH Jul 25, 12:00 UTCJul 26, 03:25 UTC15h 25m
2026-07-25 SDM6237 LED → KUF Jul 25, 03:55 UTCJul 25, 04:15 UTC20m
2026-07-24 SDM5968 SSH → KUF Jul 24, 10:30 UTCJul 24, 13:10 UTC2h 40m
2026-07-23 SDM5962 SSH → CEK Jul 23, 19:05 UTCJul 24, 08:20 UTC13h 15m
2026-07-23 SDM5969 PEE → SSH Jul 23, 11:40 UTCJul 23, 17:10 UTC5h 30m
2026-07-23 SDM5970 SSH → PEE Jul 23, 04:25 UTCJul 23, 07:15 UTC2h 50m
2026-07-22 SDM5975 UFA → SSH Jul 22, 14:40 UTCJul 23, 02:30 UTC11h 50m
2026-07-21 SDM5966 SSH → GOJ Jul 21, 23:00 UTCJul 22, 12:35 UTC13h 35m
2026-07-21 SDM5954 HRG → SVO Jul 21, 04:30 UTCJul 21, 20:55 UTC16h 25m
2026-07-20 SDM5979 GOJ → HRG Jul 20, 08:50 UTCJul 21, 08:45 UTC23h 54m
2026-07-20 SDM6954 VKO → LED Jul 20, 08:30 UTCJul 21, 06:00 UTC21h 29m
2026-07-19 SDM5956 - Jul 19, 14:15 UTCJul 20, 06:50 UTC16h 35m
2026-07-19 SDM5956 - Jul 19, 10:50 UTCJul 20, 06:50 UTC20h 0m
2026-07-19 SDM5956 - Jul 19, 09:35 UTCJul 20, 06:50 UTC21h 15m
2026-07-18 SDM5956 - Jul 18, 21:05 UTCJul 19, 16:55 UTC19h 50m
2026-07-18 SDM5956 - Jul 18, 19:15 UTCJul 19, 16:55 UTC21h 40m
2026-07-18 SDM5954 - Jul 18, 15:15 UTCJul 19, 14:45 UTC23h 30m
2026-07-18 SDM5972 HRG → PEE Jul 18, 00:50 UTCJul 18, 21:55 UTC21h 6m
2026-07-17 SDM5972 HRG → PEE Jul 17, 23:20 UTCJul 18, 21:55 UTC22h 36m
2026-07-17 SDM5972 HRG → PEE Jul 17, 10:55 UTCJul 18, 07:10 UTC20h 16m
2026-07-17 SDM5972 HRG → PEE Jul 17, 09:15 UTCJul 18, 07:10 UTC21h 56m
2026-07-17 SDM5974 - Jul 17, 06:50 UTCJul 18, 06:45 UTC23h 56m
2026-07-17 SDM5974 - Jul 17, 06:15 UTCJul 18, 04:45 UTC22h 31m
2026-07-16 SDM5974 - Jul 16, 14:50 UTCJul 17, 11:50 UTC21h 0m
2026-07-16 SDM5974 - Jul 16, 13:34 UTCJul 17, 11:50 UTC22h 15m
2026-07-15 SDM5963 - Jul 15, 14:50 UTCJul 16, 14:45 UTC23h 55m
2026-07-14 SDM5964 - Jul 14, 21:35 UTCJul 15, 16:05 UTC18h 29m
2026-07-14 SDM5964 - Jul 14, 18:50 UTCJul 15, 16:05 UTC21h 14m
2026-07-14 SDM5964 - Jul 14, 17:30 UTCJul 15, 16:05 UTC22h 34m
2026-07-14 SDM5972 - Jul 14, 05:20 UTCJul 15, 00:05 UTC18h 44m
2026-07-14 SDM5972 - Jul 14, 02:50 UTCJul 15, 00:05 UTC21h 14m
2026-07-14 SDM5972 - Jul 14, 01:20 UTCJul 15, 00:05 UTC22h 44m
2026-07-13 SDM5972 - Jul 13, 10:50 UTCJul 14, 08:05 UTC21h 15m
2026-07-13 SDM5972 - Jul 13, 08:50 UTCJul 14, 08:05 UTC23h 15m
2026-07-13 SDM5978 - Jul 13, 08:40 UTCJul 14, 06:45 UTC22h 5m
2026-07-13 SDM5978 - Jul 13, 04:50 UTCJul 14, 02:55 UTC22h 5m
2026-07-13 SDM5978 - Jul 13, 03:25 UTCJul 14, 02:45 UTC23h 20m
2026-07-12 SDM5953 - Jul 12, 08:55 UTCJul 13, 08:45 UTC23h 50m
2026-07-12 SDM6953 - Jul 12, 06:01 UTCJul 12, 07:15 UTC1h 15m
2026-07-11 SDM6954 - Jul 11, 08:55 UTCJul 11, 09:15 UTC20m
2026-07-11 SDM6953 - Jul 11, 06:15 UTCJul 11, 07:25 UTC1h 10m
2026-07-10 SDM6954 - Jul 10, 09:05 UTCJul 11, 07:25 UTC22h 20m
2026-07-10 SDM6953 - Jul 10, 05:40 UTCJul 10, 07:20 UTC1h 40m
2026-07-09 SDM6310 - Jul 9, 10:10 UTCJul 9, 17:00 UTC6h 50m
2026-07-08 SDM5956 - Jul 8, 21:30 UTCJul 9, 07:20 UTC9h 50m
2026-07-08 SDM5962 - Jul 8, 02:50 UTCJul 8, 19:40 UTC16h 50m
2026-07-07 SDM5962 - Jul 7, 16:50 UTCJul 8, 09:55 UTC17h 5m
2026-07-07 SDM5976 - Jul 7, 02:40 UTCJul 7, 14:50 UTC12h 10m

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 Jul 26, 22:25 UTC.
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, SDM5954, SDM5956.