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
263
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
SDM5978 - 31 2026-07-13
SDM5972 - 31 2026-07-14
SDM5974 - 21 2026-07-17
SDM5954 - 15 2026-06-30
SDM5980 Rossiya - Russian Airlines 14 2026-05-21
SDM5973 Rossiya - Russian Airlines 13 2026-05-26
SDM5964 - 13 2026-07-14
SDM5962 - 11 2026-07-08
SDM5956 - 11 2026-07-08
SDM5970 - 10 2026-07-05
SDM6953 - 8 2026-07-12
SDM5976 - 8 2026-07-07
SDM5968 - 8 2026-07-03
SDM5967 - 8 2026-07-04
SDM5966 - 8 2026-07-04
SDM5955 Rossiya - Russian Airlines 8 2026-06-02
SDM6954 - 6 2026-07-11
SDM5977 Rossiya - Russian Airlines 5 2026-06-02
SDM5969 - 5 2026-07-06
SDM5965 - 5 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 SDM5974 - Jul 17, 06:15 UTCJul 18, 00:45 UTC18h 30m
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
2026-07-06 SDM5969 - Jul 6, 23:00 UTCJul 7, 00:40 UTC1h 40m
2026-07-06 SDM5969 - Jul 6, 00:55 UTCJul 7, 00:40 UTC23h 45m
2026-07-05 SDM5970 - Jul 5, 23:10 UTCJul 6, 01:55 UTC2h 45m
2026-07-05 SDM5965 - Jul 5, 18:40 UTCJul 5, 19:00 UTC20m
2026-07-04 SDM5966 - Jul 4, 20:50 UTCJul 5, 19:00 UTC22h 10m
2026-07-04 SDM5966 - Jul 4, 18:50 UTCJul 5, 18:45 UTC23h 55m
2026-07-04 SDM5966 - Jul 4, 18:30 UTCJul 4, 21:15 UTC2h 45m
2026-07-04 SDM5967 - Jul 4, 13:50 UTCJul 4, 16:00 UTC2h 10m
2026-07-03 SDM5968 - Jul 3, 10:10 UTCJul 3, 12:50 UTC2h 40m
2026-07-02 SDM5962 - Jul 2, 18:45 UTCJul 3, 07:55 UTC13h 10m
2026-07-02 SDM5970 - Jul 2, 02:40 UTCJul 2, 16:45 UTC14h 5m
2026-07-01 SDM5976 - Jul 1, 11:45 UTCJul 2, 00:45 UTC13h 0m
2026-06-30 SDM5966 - Jun 30, 21:30 UTCJul 1, 09:20 UTC11h 50m
2026-06-30 SDM5954 - Jun 30, 01:25 UTCJun 30, 18:35 UTC17h 11m
2026-06-29 SDM5954 - Jun 29, 11:45 UTCJun 30, 08:15 UTC20h 31m
2026-06-29 SDM6151 SVO → KGD Jun 29, 09:14 UTCJun 29, 10:00 UTC45m
2026-06-27 SDM5964 - Jun 27, 06:50 UTCJun 28, 01:04 UTC18h 15m
2026-06-27 SDM5978 - Jun 27, 06:35 UTCJun 28, 01:04 UTC18h 30m
2026-06-27 SDM5978 - Jun 27, 02:50 UTCJun 28, 01:04 UTC22h 15m
2026-06-27 SDM5978 - Jun 27, 02:25 UTCJun 28, 00:45 UTC22h 20m
2026-06-26 SDM5978 - Jun 26, 09:00 UTCJun 27, 08:44 UTC23h 45m
2026-06-26 SDM5953 - Jun 26, 08:24 UTCJun 27, 06:44 UTC22h 20m
2026-06-26 SDM6953 - Jun 26, 05:44 UTCJun 26, 06:29 UTC45m
2026-06-26 SDM6953 - Jun 26, 02:20 UTCJun 26, 02:44 UTC25m

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 SDM5978, SDM5972, SDM5974, SDM5954, SDM5980.