Apparatus

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sensors Mode-S transponder

151DA4

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73124 · BOEING 737-800

Hex
151DA4
Octal
05216644
Decimal
1,383,844
Country
RU
Tail
RA-73124
Type
B738
No current signal · last broadcast 8h ago
Flights observed
117
Distinct callsigns
20
Country
RU
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 151DA4.

Country allocation

The ICAO 24-bit address 151DA4 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
AFL427 Aeroflot Russian Airlines 10 2026-05-19
AFL423 Aeroflot Russian Airlines 10 2026-05-26
AFL912 Aeroflot Russian Airlines 8 2026-04-19
AFL909 Aeroflot Russian Airlines 7 2026-04-18
AFL429 Aeroflot Russian Airlines 7 2026-05-07
AFL422 Aeroflot Russian Airlines 7 2026-05-26
AFL2122 Aeroflot Russian Airlines 6 2026-05-29
AFL913 Aeroflot Russian Airlines 5 2026-04-17
AFL908 Aeroflot Russian Airlines 5 2026-04-18
AFL426 Aeroflot Russian Airlines 5 2026-05-18
AFL2123 Aeroflot Russian Airlines 5 2026-05-29
AFL802 Aeroflot Russian Airlines 3 2026-05-03
AFL676 Aeroflot Russian Airlines 3 2026-05-03
AFL428 Aeroflot Russian Airlines 3 2026-05-27
AFL2127 Aeroflot Russian Airlines 3 2026-05-24
AFL1995 Aeroflot Russian Airlines 3 2026-05-23
AFL803 Aeroflot Russian Airlines 2 2026-05-03
AFL677 Aeroflot Russian Airlines 2 2026-05-03
AFL431 Aeroflot Russian Airlines 2 2026-04-23
AFL2121 Aeroflot Russian Airlines 2 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AFL2123 DLM → SVO May 29, 14:45 UTCMay 29, 16:35 UTC1h 50m
2026-05-29 AFL2122 SVO → DLM May 29, 03:40 UTCMay 29, 13:05 UTC9h 25m
2026-05-28 AFL1966 SVO → EVN May 28, 22:30 UTCMay 28, 23:15 UTC45m
2026-05-27 AFL419 SSH → SVO May 27, 17:50 UTCMay 27, 20:35 UTC2h 45m
2026-05-27 AFL917 SSH → KRR May 27, 07:45 UTCMay 27, 15:55 UTC8h 10m
2026-05-27 AFL428 SVO → SSH May 27, 03:54 UTCMay 27, 05:19 UTC1h 25m
2026-05-26 AFL423 HRG → SVO May 26, 08:50 UTCMay 26, 16:50 UTC8h 0m
2026-05-26 AFL422 SVO → HRG May 26, 05:45 UTCMay 26, 06:10 UTC25m
2026-05-24 AFL2127 AYT → SVO May 24, 18:35 UTCMay 24, 18:50 UTC15m
2026-05-24 AFL2127 AYT → SVO May 24, 14:25 UTCMay 24, 16:25 UTC2h 0m
2026-05-23 AFL2132 SVO → IST May 23, 18:30 UTCMay 23, 19:00 UTC30m
2026-05-23 AFL1995 EVN → SVO May 23, 01:30 UTCMay 23, 02:05 UTC35m
2026-05-22 AFL2127 AYT → SVO May 22, 14:10 UTCMay 22, 16:05 UTC1h 55m
2026-05-22 AFL1995 EVN → SVO May 22, 01:30 UTCMay 22, 12:40 UTC11h 10m
2026-05-21 AFL2125 AYT → SVO May 21, 13:20 UTCMay 21, 15:20 UTC2h 0m
2026-05-21 AFL2124 SVO → AYT May 21, 11:00 UTCMay 21, 11:10 UTC10m
2026-05-21 AFL1995 EVN → SVO May 21, 01:25 UTCMay 21, 10:15 UTC8h 50m
2026-05-19 AFL427 SSH → SVO May 19, 13:05 UTCMay 20, 08:10 UTC19h 6m
2026-05-19 AFL427 SSH → SVO May 19, 12:35 UTCMay 20, 08:10 UTC19h 36m
2026-05-18 AFL426 SVO → SSH May 18, 15:05 UTCMay 19, 10:00 UTC18h 54m
2026-05-18 AFL423 HRG → SVO May 18, 13:05 UTCMay 19, 10:00 UTC20h 54m
2026-05-18 AFL423 HRG → SVO May 18, 12:30 UTCMay 19, 10:00 UTC21h 29m
2026-05-18 AFL423 HRG → SVO May 18, 09:05 UTCMay 19, 09:00 UTC23h 54m
2026-05-18 AFL423 HRG → SVO May 18, 08:55 UTCMay 18, 16:00 UTC7h 5m
2026-05-17 AFL423 HRG → SVO May 17, 15:05 UTCMay 18, 15:00 UTC23h 55m
2026-05-17 AFL423 HRG → SVO May 17, 14:25 UTCMay 18, 13:00 UTC22h 35m
2026-05-17 AFL422 SVO → HRG May 17, 11:05 UTCMay 18, 10:10 UTC23h 5m
2026-05-17 AFL422 SVO → HRG May 17, 10:45 UTCMay 18, 09:00 UTC22h 15m
2026-05-16 AFL423 HRG → SVO May 16, 17:20 UTCMay 17, 15:50 UTC22h 30m
2026-05-16 AFL422 SVO → HRG May 16, 15:05 UTCMay 17, 15:01 UTC23h 55m
2026-05-16 AFL423 HRG → SVO May 16, 13:51 UTCMay 17, 12:01 UTC22h 10m
2026-05-16 AFL423 HRG → SVO May 16, 08:26 UTCMay 16, 17:30 UTC9h 5m
2026-05-15 AFL2123 DLM → SVO May 15, 15:05 UTCMay 16, 15:01 UTC23h 56m
2026-05-15 AFL2123 DLM → SVO May 15, 14:50 UTCMay 16, 09:25 UTC18h 36m
2026-05-15 AFL2122 SVO → DLM May 15, 12:45 UTCMay 15, 13:10 UTC25m
2026-05-13 AFL2123 DLM → SVO May 13, 14:45 UTCMay 13, 17:05 UTC2h 20m
2026-05-13 AFL2122 SVO → DLM May 13, 01:30 UTCMay 13, 13:05 UTC11h 35m
2026-05-12 AFL2121 BJV → SVO May 12, 11:25 UTCMay 12, 14:05 UTC2h 40m
2026-05-11 AFL7003 AYT → AUH May 11, 17:05 UTCMay 12, 10:00 UTC16h 55m
2026-05-11 AFL1678 SVO → ASF May 11, 05:00 UTCMay 11, 05:20 UTC20m
2026-05-09 AFL426 SVO → SSH May 9, 19:05 UTCMay 10, 14:04 UTC19h 0m
2026-05-09 AFL426 SVO → SSH May 9, 18:30 UTCMay 10, 14:04 UTC19h 35m
2026-05-09 AFL916 KRR → SSH May 9, 08:20 UTCMay 9, 16:15 UTC7h 55m
2026-05-08 AFL428 SVO → SSH May 8, 17:10 UTCMay 9, 06:15 UTC13h 5m
2026-05-08 AFL2122 SVO → DLM May 8, 01:19 UTCMay 8, 15:35 UTC14h 15m
2026-05-07 AFL429 SSH → SVO May 7, 02:50 UTCMay 7, 10:25 UTC7h 35m
2026-05-06 AFL429 SSH → SVO May 6, 13:20 UTCMay 7, 10:25 UTC21h 5m
2026-05-06 AFL429 SSH → SVO May 6, 11:05 UTCMay 7, 10:25 UTC23h 20m
2026-05-06 AFL428 SVO → SSH May 6, 09:05 UTCMay 7, 08:45 UTC23h 40m
2026-05-06 AFL422 SVO → HRG May 6, 08:30 UTCMay 7, 04:55 UTC20h 24m

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-73124 page for operator, model, and routing details .

Mode-S 151DA4 frequently asked

What is Mode-S code 151DA4?
151DA4 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73124.
Where is Mode-S 151DA4 registered?
Mode-S code 151DA4 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DA4 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DA4, octal 05216644, decimal 1,383,844.
What flights does 151DA4 operate?
Mode-S 151DA4 has broadcast 20 distinct callsigns, including AFL427, AFL423, AFL912, AFL909, AFL429.