Apparatus

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sensors Mode-S transponder

151DA5

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73125 · BOEING 737-800

Hex
151DA5
Octal
05216645
Decimal
1,383,845
Country
RU
Tail
RA-73125
Type
B738
Broadcasting now · callsign AFL2121 · 36,975 ft
Flights observed
114
Distinct callsigns
20
Country
RU
Last broadcast
39m ago

Current position

151DA5 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 151DA5 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
AFL425 Aeroflot Russian Airlines 14 2026-05-21
AFL2121 Aeroflot Russian Airlines 7 2026-05-30
AFL2120 Aeroflot Russian Airlines 7 2026-05-26
AFL2126 Aeroflot Russian Airlines 6 2026-05-27
AFL423 Aeroflot Russian Airlines 5 2026-05-21
AFL1443 Aeroflot Russian Airlines 5 2026-04-22
AFL428 Aeroflot Russian Airlines 4 2026-05-24
AFL2124 Aeroflot Russian Airlines 4 2026-05-11
AFL429 Aeroflot Russian Airlines 3 2026-05-25
AFL427 Aeroflot Russian Airlines 3 2026-05-28
AFL424 Aeroflot Russian Airlines 3 2026-05-20
AFL2147 Aeroflot Russian Airlines 3 2026-05-16
AFL2127 Aeroflot Russian Airlines 3 2026-05-29
AFL2125 Aeroflot Russian Airlines 3 2026-05-11
AFL1442 Aeroflot Russian Airlines 3 2026-04-21
AFL2149 Aeroflot Russian Airlines 2 2026-05-10
AFL2148 Aeroflot Russian Airlines 2 2026-05-10
AFL2132 Aeroflot Russian Airlines 2 2026-05-02
AFL2122 Aeroflot Russian Airlines 2 2026-05-12
AFL1869 Aeroflot Russian Airlines 2 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AFL2121 BJV → SVO May 30, 11:45 UTCMay 30, 13:15 UTC1h 30m
2026-05-29 AFL2127 AYT → SVO May 29, 14:05 UTCMay 30, 10:10 UTC20h 5m
2026-05-29 AFL1995 EVN → SVO May 29, 02:35 UTCMay 29, 03:00 UTC25m
2026-05-28 AFL1994 SVO → EVN May 28, 21:15 UTCMay 28, 22:00 UTC45m
2026-05-28 AFL427 SSH → SVO May 28, 08:35 UTCMay 28, 15:25 UTC6h 50m
2026-05-27 AFL427 SSH → SVO May 27, 15:20 UTCMay 28, 15:15 UTC23h 55m
2026-05-27 AFL2127 AYT → SVO May 27, 14:10 UTCMay 28, 13:15 UTC23h 5m
2026-05-27 AFL2126 SVO → AYT May 27, 11:55 UTCMay 27, 12:20 UTC25m
2026-05-27 AFL2126 SVO → AYT May 27, 10:05 UTCMay 27, 11:15 UTC1h 10m
2026-05-26 AFL2126 SVO → AYT May 26, 13:19 UTCMay 27, 11:15 UTC21h 56m
2026-05-26 AFL2121 BJV → SVO May 26, 11:20 UTCMay 27, 11:15 UTC23h 56m
2026-05-26 AFL2120 SVO → BJV May 26, 09:09 UTCMay 26, 09:35 UTC25m
2026-05-26 AFL2120 SVO → BJV May 26, 05:00 UTCMay 26, 05:34 UTC35m
2026-05-25 AFL1865 EVN → SVO May 25, 21:24 UTCMay 25, 21:45 UTC20m
2026-05-25 AFL1865 EVN → SVO May 25, 19:00 UTCMay 25, 19:30 UTC29m
2026-05-25 AFL429 SSH → SVO May 25, 06:50 UTCMay 25, 08:10 UTC1h 20m
2026-05-24 AFL428 SVO → SSH May 24, 09:20 UTCMay 25, 04:50 UTC19h 30m
2026-05-24 AFL428 SVO → SSH May 24, 09:00 UTCMay 25, 04:50 UTC19h 50m
2026-05-21 AFL423 HRG → SVO May 21, 21:20 UTCMay 22, 16:55 UTC19h 35m
2026-05-21 AFL423 HRG → SVO May 21, 19:20 UTCMay 22, 16:55 UTC21h 35m
2026-05-21 AFL423 HRG → SVO May 21, 18:45 UTCMay 22, 16:55 UTC22h 10m
2026-05-21 AFL425 HRG → SVO May 21, 15:20 UTCMay 22, 15:10 UTC23h 50m
2026-05-21 AFL425 HRG → SVO May 21, 14:55 UTCMay 22, 11:10 UTC20h 15m
2026-05-21 AFL425 HRG → SVO May 21, 03:20 UTCMay 21, 21:50 UTC18h 30m
2026-05-21 AFL425 HRG → SVO May 21, 03:10 UTCMay 21, 21:50 UTC18h 40m
2026-05-20 AFL424 SVO → HRG May 20, 17:20 UTCMay 21, 16:15 UTC22h 55m
2026-05-20 AFL2161 AYT → SVO May 20, 15:55 UTCMay 21, 15:15 UTC23h 20m
2026-05-19 AFL1869 EVN → SVO May 19, 20:35 UTCMay 19, 21:35 UTC1h 0m
2026-05-19 AFL425 HRG → SVO May 19, 02:55 UTCMay 19, 10:20 UTC7h 25m
2026-05-18 AFL424 SVO → HRG May 18, 23:00 UTCMay 18, 23:45 UTC45m
2026-05-17 AFL425 HRG → SVO May 17, 19:50 UTCMay 18, 14:05 UTC18h 15m
2026-05-17 AFL425 HRG → SVO May 17, 15:55 UTCMay 18, 14:05 UTC22h 10m
2026-05-17 AFL425 HRG → SVO May 17, 06:50 UTCMay 17, 23:20 UTC16h 30m
2026-05-17 AFL425 HRG → SVO May 17, 03:20 UTCMay 17, 23:20 UTC20h 0m
2026-05-17 AFL425 HRG → SVO May 17, 03:00 UTCMay 17, 23:20 UTC20h 20m
2026-05-16 AFL920 KRR → HRG May 16, 17:20 UTCMay 17, 17:15 UTC23h 55m
2026-05-16 AFL2147 AYT → SVO May 16, 15:05 UTCMay 17, 08:05 UTC17h 0m
2026-05-16 AFL2146 SVO → AYT May 16, 13:15 UTCMay 16, 13:41 UTC25m
2026-05-16 AFL2133 IST → SVO May 16, 01:20 UTCMay 16, 01:30 UTC10m
2026-05-15 AFL2121 BJV → SVO May 15, 11:30 UTCMay 15, 11:50 UTC20m
2026-05-15 AFL2120 SVO → BJV May 15, 09:35 UTCMay 15, 10:00 UTC25m
2026-05-14 AFL2121 BJV → SVO May 14, 13:20 UTCMay 15, 08:35 UTC19h 15m
2026-05-14 AFL2121 BJV → SVO May 14, 11:35 UTCMay 15, 08:35 UTC21h 0m
2026-05-13 AFL2147 AYT → SVO May 13, 15:20 UTCMay 14, 10:05 UTC18h 45m
2026-05-13 AFL2147 AYT → SVO May 13, 15:10 UTCMay 14, 10:05 UTC18h 55m
2026-05-12 AFL2123 DLM → SVO May 12, 14:35 UTCMay 12, 17:00 UTC2h 25m
2026-05-12 AFL2122 SVO → DLM May 12, 12:30 UTCMay 12, 12:50 UTC20m
2026-05-12 AFL2122 SVO → DLM May 12, 08:10 UTCMay 12, 08:45 UTC35m
2026-05-11 AFL2125 AYT → SVO May 11, 13:10 UTCMay 11, 15:35 UTC2h 25m
2026-05-11 AFL2124 SVO → AYT May 11, 10:30 UTCMay 11, 10:50 UTC20m

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-73125 page for operator, model, and routing details .

Mode-S 151DA5 frequently asked

What is Mode-S code 151DA5?
151DA5 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73125.
Where is Mode-S 151DA5 registered?
Mode-S code 151DA5 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DA5 broadcasting right now?
Yes. Mode-S 151DA5 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DA5, octal 05216645, decimal 1,383,845.
What flights does 151DA5 operate?
Mode-S 151DA5 has broadcast 20 distinct callsigns, including AFL425, AFL2121, AFL2120, AFL2126, AFL423.