Apparatus

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sensors Mode-S transponder

151DB4

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73140 · BOEING 777-300ER

Hex
151DB4
Octal
05216664
Decimal
1,383,860
Country
RU
Tail
RA-73140
Type
B77W
No current signal · last broadcast 13h ago
Flights observed
89
Distinct callsigns
20
Country
RU
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 151DB4.

Country allocation

The ICAO 24-bit address 151DB4 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
AFL221 Aeroflot Russian Airlines 12 2026-06-03
AFL204 Aeroflot Russian Airlines 12 2026-06-03
AFL220 Aeroflot Russian Airlines 11 2026-06-04
AFL209 Aeroflot Russian Airlines 10 2026-05-27
AFL205 Aeroflot Russian Airlines 6 2026-06-03
AFL576 - 4 2026-05-01
AFL325 Aeroflot Russian Airlines 3 2026-05-30
AFL233 Aeroflot Russian Airlines 3 2026-05-23
AFL232 Aeroflot Russian Airlines 3 2026-05-22
AFL1735 Aeroflot Russian Airlines 3 2026-05-11
AFL577 Aeroflot Russian Airlines 2 2026-05-02
AFL324 Aeroflot Russian Airlines 2 2026-05-29
AFL225 Aeroflot Russian Airlines 2 2026-04-20
AFL208 Aeroflot Russian Airlines 2 2026-05-26
AFL1776 - 2 2026-04-29
AFL1713 Aeroflot Russian Airlines 2 2026-04-30
AFL639 Aeroflot Russian Airlines 1 2026-04-28
AFL638 Aeroflot Russian Airlines 1 2026-04-28
AFL320 Aeroflot Russian Airlines 1 2026-05-01
AFL224 Aeroflot Russian Airlines 1 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-04 AFL220 SVO → CAN Jun 4, 17:20 UTCJun 5, 09:35 UTC16h 15m
2026-06-04 AFL220 SVO → CAN Jun 4, 11:35 UTCJun 5, 09:35 UTC22h 0m
2026-06-04 AFL220 SVO → CAN Jun 4, 09:05 UTCJun 5, 09:00 UTC23h 55m
2026-06-04 AFL220 SVO → CAN Jun 4, 08:45 UTCJun 4, 20:30 UTC11h 45m
2026-06-03 AFL220 SVO → CAN Jun 3, 19:50 UTCJun 4, 17:55 UTC22h 5m
2026-06-03 AFL221 CAN → SVO Jun 3, 17:45 UTCJun 4, 11:50 UTC18h 5m
2026-06-03 AFL220 SVO → CAN Jun 3, 16:40 UTCJun 3, 17:00 UTC20m
2026-06-03 AFL205 PKX → SVO Jun 3, 04:05 UTCJun 3, 11:35 UTC7h 30m
2026-06-03 AFL204 SVO → PKX Jun 3, 00:55 UTCJun 3, 01:10 UTC15m
2026-06-02 AFL204 SVO → PKX Jun 2, 07:15 UTCJun 2, 22:25 UTC15h 10m
2026-06-01 AFL204 SVO → PKX Jun 1, 21:30 UTCJun 2, 20:00 UTC22h 30m
2026-06-01 AFL204 SVO → PKX Jun 1, 19:30 UTCJun 2, 10:20 UTC14h 50m
2026-05-30 AFL325 MLE → SVO May 30, 00:50 UTCMay 30, 18:20 UTC17h 30m
2026-05-29 AFL325 MLE → SVO May 29, 21:35 UTCMay 30, 18:20 UTC20h 45m
2026-05-29 AFL324 SVO → MLE May 29, 20:30 UTCMay 30, 18:20 UTC21h 50m
2026-05-28 AFL221 CAN → SVO May 28, 17:55 UTCMay 29, 11:35 UTC17h 40m
2026-05-28 AFL221 CAN → SVO May 28, 13:05 UTCMay 29, 11:35 UTC22h 30m
2026-05-28 AFL221 CAN → SVO May 28, 11:55 UTCMay 29, 09:50 UTC21h 55m
2026-05-28 AFL221 CAN → SVO May 28, 09:05 UTCMay 29, 09:00 UTC23h 55m
2026-05-27 AFL221 CAN → SVO May 27, 20:10 UTCMay 28, 18:10 UTC22h 0m
2026-05-27 AFL221 CAN → SVO May 27, 11:45 UTCMay 28, 09:55 UTC22h 10m
2026-05-27 AFL209 PVG → SVO May 27, 09:05 UTCMay 28, 09:00 UTC23h 55m
2026-05-26 AFL209 PVG → SVO May 26, 21:04 UTCMay 27, 20:45 UTC23h 41m
2026-05-26 AFL209 PVG → SVO May 26, 18:19 UTCMay 27, 12:10 UTC17h 50m
2026-05-26 AFL208 SVO → PVG May 26, 08:34 UTCMay 26, 21:04 UTC12h 30m
2026-05-25 AFL221 CAN → SVO May 25, 19:44 UTCMay 26, 18:45 UTC23h 0m
2026-05-24 AFL209 PVG → SVO May 24, 20:40 UTCMay 25, 13:15 UTC16h 35m
2026-05-24 AFL209 PVG → SVO May 24, 17:35 UTCMay 25, 13:15 UTC19h 40m
2026-05-23 AFL233 DEL → SVO May 23, 08:00 UTCMay 23, 12:35 UTC4h 35m
2026-05-23 AFL233 DEL → SVO May 23, 03:10 UTCMay 23, 04:35 UTC1h 25m
2026-05-22 AFL232 SVO → DEL May 22, 06:50 UTCMay 23, 00:30 UTC17h 40m
2026-05-21 AFL205 PKX → SVO May 21, 09:50 UTCMay 22, 07:15 UTC21h 25m
2026-05-21 AFL205 PKX → SVO May 21, 07:10 UTCMay 22, 07:00 UTC23h 50m
2026-05-21 AFL205 PKX → SVO May 21, 04:05 UTCMay 21, 10:15 UTC6h 10m
2026-05-21 AFL204 SVO → PKX May 21, 00:50 UTCMay 21, 01:00 UTC10m
2026-05-20 AFL204 SVO → PKX May 20, 19:20 UTCMay 20, 22:05 UTC2h 45m
2026-05-20 AFL204 SVO → PKX May 20, 18:25 UTCMay 20, 18:35 UTC10m
2026-05-17 AFL1715 KHV → SVO May 17, 19:50 UTCMay 18, 10:40 UTC14h 50m
2026-05-17 AFL1714 SVO → KHV May 17, 18:45 UTCMay 17, 19:05 UTC20m
2026-05-17 AFL1017 KGD → SVO May 17, 13:40 UTCMay 17, 14:35 UTC55m
2026-05-17 AFL1016 SVO → KGD May 17, 10:45 UTCMay 17, 11:30 UTC45m
2026-05-12 AFL205 PKX → SVO May 12, 19:20 UTCMay 13, 10:35 UTC15h 15m
2026-05-12 AFL204 SVO → PKX May 12, 09:05 UTCMay 13, 08:00 UTC22h 55m
2026-05-12 AFL204 SVO → PKX May 12, 08:50 UTCMay 12, 22:01 UTC13h 10m
2026-05-11 AFL209 PVG → SVO May 11, 20:20 UTCMay 12, 09:40 UTC13h 20m
2026-05-11 AFL1735 PKC → SVO May 11, 11:05 UTCMay 12, 09:40 UTC22h 36m
2026-05-11 AFL1735 PKC → SVO May 11, 10:25 UTCMay 12, 09:00 UTC22h 36m
2026-05-10 AFL1735 PKC → SVO May 10, 11:35 UTCMay 11, 11:00 UTC23h 25m
2026-05-09 AFL209 PVG → SVO May 9, 20:10 UTCMay 10, 12:05 UTC15h 55m
2026-05-09 AFL209 PVG → SVO May 9, 11:25 UTCMay 10, 09:45 UTC22h 20m

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-73140 page for operator, model, and routing details .

Mode-S 151DB4 frequently asked

What is Mode-S code 151DB4?
151DB4 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73140.
Where is Mode-S 151DB4 registered?
Mode-S code 151DB4 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DB4 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DB4, octal 05216664, decimal 1,383,860.
What flights does 151DB4 operate?
Mode-S 151DB4 has broadcast 20 distinct callsigns, including AFL221, AFL204, AFL220, AFL209, AFL205.