Apparatus

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sensors Mode-S transponder

151D8B

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73099 · BOEING 737-800

Hex
151D8B
Octal
05216613
Decimal
1,383,819
Country
RU
Tail
RA-73099
Type
B738
No current signal · last broadcast 8h ago
Flights observed
135
Distinct callsigns
20
Country
RU
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 151D8B.

Country allocation

The ICAO 24-bit address 151D8B 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
AFL423 Aeroflot Russian Airlines 15 2026-05-25
AFL901 Aeroflot Russian Airlines 10 2026-05-16
AFL2124 Aeroflot Russian Airlines 9 2026-05-01
AFL905 Aeroflot Russian Airlines 8 2026-05-17
AFL422 Aeroflot Russian Airlines 8 2026-05-23
AFL427 Aeroflot Russian Airlines 7 2026-05-06
AFL426 Aeroflot Russian Airlines 6 2026-05-05
AFL2126 Aeroflot Russian Airlines 6 2026-05-30
AFL424 Aeroflot Russian Airlines 5 2026-05-25
AFL2125 Aeroflot Russian Airlines 5 2026-05-01
AFL1995 Aeroflot Russian Airlines 5 2026-05-07
AFL904 Aeroflot Russian Airlines 4 2026-05-17
AFL900 Aeroflot Russian Airlines 4 2026-05-15
AFL428 Aeroflot Russian Airlines 3 2026-05-27
AFL425 Aeroflot Russian Airlines 3 2026-05-26
AFL2146 Aeroflot Russian Airlines 3 2026-04-30
AFL2122 Aeroflot Russian Airlines 3 2026-05-05
AFL1994 Aeroflot Russian Airlines 3 2026-05-06
AFL1441 Aeroflot Russian Airlines 3 2026-05-26
AFL429 Aeroflot Russian Airlines 2 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AFL2126 SVO → AYT May 30, 12:15 UTCMay 30, 12:25 UTC10m
2026-05-29 AFL2161 AYT → SVO May 29, 15:55 UTCMay 30, 11:25 UTC19h 30m
2026-05-29 AFL2160 SVO → AYT May 29, 13:55 UTCMay 29, 14:20 UTC25m
2026-05-29 AFL2160 SVO → AYT May 29, 09:35 UTCMay 29, 10:00 UTC25m
2026-05-28 AFL2132 SVO → IST May 28, 18:40 UTCMay 28, 19:10 UTC30m
2026-05-28 AFL429 SSH → SVO May 28, 08:10 UTCMay 28, 09:35 UTC1h 25m
2026-05-27 AFL428 SVO → SSH May 27, 15:05 UTCMay 28, 05:10 UTC14h 5m
2026-05-26 AFL1441 IKT → SVO May 26, 22:54 UTCMay 27, 13:30 UTC14h 36m
2026-05-26 AFL1441 IKT → SVO May 26, 15:24 UTCMay 27, 13:30 UTC22h 6m
2026-05-26 AFL1441 IKT → SVO May 26, 08:50 UTCMay 27, 03:09 UTC18h 20m
2026-05-26 AFL425 HRG → SVO May 26, 02:55 UTCMay 26, 23:35 UTC20h 40m
2026-05-25 AFL424 SVO → HRG May 25, 22:49 UTCMay 25, 23:45 UTC55m
2026-05-25 AFL423 HRG → SVO May 25, 07:50 UTCMay 25, 15:30 UTC7h 40m
2026-05-24 AFL423 HRG → SVO May 24, 16:50 UTCMay 25, 15:30 UTC22h 40m
2026-05-24 AFL423 HRG → SVO May 24, 14:50 UTCMay 25, 14:45 UTC23h 55m
2026-05-24 AFL423 HRG → SVO May 24, 13:55 UTCMay 25, 12:45 UTC22h 50m
2026-05-24 AFL423 HRG → SVO May 24, 10:50 UTCMay 25, 10:15 UTC23h 25m
2026-05-24 AFL423 HRG → SVO May 24, 08:50 UTCMay 25, 08:15 UTC23h 25m
2026-05-23 AFL422 SVO → HRG May 23, 14:50 UTCMay 24, 14:45 UTC23h 55m
2026-05-23 AFL422 SVO → HRG May 23, 13:45 UTCMay 24, 11:10 UTC21h 25m
2026-05-23 AFL422 SVO → HRG May 23, 10:50 UTCMay 24, 10:45 UTC23h 55m
2026-05-23 AFL422 SVO → HRG May 23, 08:50 UTCMay 24, 08:45 UTC23h 55m
2026-05-23 AFL422 SVO → HRG May 23, 08:30 UTCMay 23, 15:00 UTC6h 30m
2026-05-20 AFL2121 BJV → SVO May 20, 11:15 UTCMay 21, 01:20 UTC14h 5m
2026-05-19 AFL2120 SVO → BJV May 19, 18:10 UTCMay 20, 09:40 UTC15h 31m
2026-05-19 AFL1443 IKT → SVO May 19, 06:25 UTCMay 19, 18:20 UTC11h 55m
2026-05-18 AFL1442 SVO → IKT May 18, 22:05 UTCMay 19, 18:20 UTC20h 15m
2026-05-18 AFL1442 SVO → IKT May 18, 18:40 UTCMay 18, 19:00 UTC20m
2026-05-17 AFL905 HRG → SVX May 17, 10:50 UTCMay 18, 05:00 UTC18h 10m
2026-05-17 AFL905 HRG → SVX May 17, 10:20 UTCMay 18, 05:00 UTC18h 40m
2026-05-17 AFL905 HRG → SVX May 17, 06:50 UTCMay 18, 05:00 UTC22h 10m
2026-05-17 AFL905 HRG → SVX May 17, 04:50 UTCMay 18, 04:45 UTC23h 55m
2026-05-17 AFL904 SVX → HRG May 17, 03:20 UTCMay 17, 14:05 UTC10h 45m
2026-05-16 AFL901 SSH → SVX May 16, 09:06 UTCMay 16, 13:01 UTC3h 55m
2026-05-15 AFL900 SVX → SSH May 15, 10:50 UTCMay 16, 06:20 UTC19h 30m
2026-05-15 AFL900 SVX → SSH May 15, 10:35 UTCMay 16, 06:20 UTC19h 45m
2026-05-15 AFL900 SVX → SSH May 15, 06:50 UTCMay 16, 06:20 UTC23h 30m
2026-05-15 AFL904 SVX → HRG May 15, 05:40 UTCMay 16, 02:25 UTC20h 44m
2026-05-14 AFL904 SVX → HRG May 14, 12:50 UTCMay 15, 12:00 UTC23h 10m
2026-05-14 AFL901 SSH → SVX May 14, 10:50 UTCMay 15, 10:45 UTC23h 55m
2026-05-14 AFL901 SSH → SVX May 14, 09:55 UTCMay 15, 07:45 UTC21h 50m
2026-05-14 AFL901 SSH → SVX May 14, 06:50 UTCMay 15, 06:45 UTC23h 55m
2026-05-14 AFL901 SSH → SVX May 14, 06:35 UTCMay 14, 13:30 UTC6h 55m
2026-05-13 AFL901 SSH → SVX May 13, 12:50 UTCMay 14, 12:45 UTC23h 55m
2026-05-13 AFL905 HRG → SVX May 13, 11:25 UTCMay 14, 10:45 UTC23h 20m
2026-05-13 AFL905 HRG → SVX May 13, 09:20 UTCMay 14, 07:00 UTC21h 40m
2026-05-13 AFL905 HRG → SVX May 13, 02:35 UTCMay 13, 13:05 UTC10h 30m
2026-05-12 AFL905 HRG → SVX May 12, 12:50 UTCMay 13, 12:45 UTC23h 55m
2026-05-12 AFL904 SVX → HRG May 12, 11:00 UTCMay 13, 10:45 UTC23h 45m
2026-05-12 AFL901 SSH → SVX May 12, 09:00 UTCMay 13, 06:35 UTC21h 35m

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-73099 page for operator, model, and routing details .

Mode-S 151D8B frequently asked

What is Mode-S code 151D8B?
151D8B is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73099.
Where is Mode-S 151D8B registered?
Mode-S code 151D8B is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D8B 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 151D8B, octal 05216613, decimal 1,383,819.
What flights does 151D8B operate?
Mode-S 151D8B has broadcast 20 distinct callsigns, including AFL423, AFL901, AFL2124, AFL905, AFL422.