Apparatus

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sensors Mode-S transponder

151DD4

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73172 · AIRBUS A-320

Hex
151DD4
Octal
05216724
Decimal
1,383,892
Country
RU
Tail
RA-73172
Type
A320
No current signal · last broadcast 6h ago
Flights observed
82
Distinct callsigns
20
Country
RU
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 151DD4.

Country allocation

The ICAO 24-bit address 151DD4 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
AFL641 Aeroflot Russian Airlines 6 2026-05-30
AFL601 Aeroflot Russian Airlines 5 2026-05-30
AFL801 Aeroflot Russian Airlines 2 2026-04-26
AFL800 Aeroflot Russian Airlines 2 2026-04-26
AFL799 Aeroflot Russian Airlines 2 2026-04-26
AFL600 Aeroflot Russian Airlines 2 2026-04-20
AFL1587 Aeroflot Russian Airlines 2 2026-04-15
AFL1568 Aeroflot Russian Airlines 2 2026-05-25
AFL1535 Aeroflot Russian Airlines 2 2026-04-22
AFL1512 Aeroflot Russian Airlines 2 2026-05-09
AFL1451 Aeroflot Russian Airlines 2 2026-05-28
AFL1394 Aeroflot Russian Airlines 2 2026-05-21
AFL1261 Aeroflot Russian Airlines 2 2026-05-25
AFL1215 Aeroflot Russian Airlines 2 2026-05-16
AFL1201 Aeroflot Russian Airlines 2 2026-04-16
AFL1180 Aeroflot Russian Airlines 2 2026-04-30
AFL1172 Aeroflot Russian Airlines 2 2026-05-20
AFL006 - 2 2026-04-18
AFL798 Aeroflot Russian Airlines 1 2026-04-25
AFL7773 - 1 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AFL641 IST → AER May 30, 14:35 UTCMay 30, 15:05 UTC30m
2026-05-30 AFL601 EVN → AER May 30, 08:05 UTCMay 30, 08:45 UTC40m
2026-05-29 AFL641 IST → AER May 29, 14:40 UTCMay 29, 15:10 UTC30m
2026-05-29 AFL640 AER → IST May 29, 13:10 UTCMay 29, 13:25 UTC15m
2026-05-29 AFL601 EVN → AER May 29, 08:15 UTCMay 29, 08:55 UTC40m
2026-05-28 AFL1451 KEJ → SVO May 28, 05:10 UTCMay 28, 05:25 UTC15m
2026-05-28 AFL1451 KEJ → SVO May 28, 01:35 UTCMay 28, 02:10 UTC35m
2026-05-27 AFL1450 SVO → KEJ May 27, 23:40 UTCMay 28, 00:25 UTC45m
2026-05-25 AFL1568 SVO → TJM May 25, 21:40 UTCMay 25, 22:10 UTC30m
2026-05-25 AFL1261 UFA → SVO May 25, 02:20 UTCMay 25, 16:30 UTC14h 10m
2026-05-24 AFL1261 UFA → SVO May 24, 19:05 UTCMay 25, 16:30 UTC21h 25m
2026-05-24 AFL1005 KGD → SVO May 24, 15:00 UTCMay 25, 08:40 UTC17h 40m
2026-05-23 AFL1234 SVO → UFA May 23, 10:10 UTCMay 23, 23:20 UTC13h 11m
2026-05-21 AFL1394 SVO → PEE May 21, 19:10 UTCMay 21, 19:25 UTC15m
2026-05-20 AFL1172 SVO → ASF May 20, 23:25 UTCMay 21, 00:20 UTC55m
2026-05-20 AFL1007 KGD → SVO May 20, 19:35 UTCMay 20, 21:30 UTC1h 55m
2026-05-20 AFL1006 SVO → KGD May 20, 15:45 UTCMay 20, 18:00 UTC2h 15m
2026-05-19 AFL1400 SVO → SVX May 19, 07:30 UTCMay 19, 07:40 UTC10m
2026-05-18 AFL1334 SVO → ARH May 18, 18:10 UTCMay 18, 18:40 UTC29m
2026-05-18 AFL1232 SVO → UFA May 18, 11:50 UTCMay 18, 13:15 UTC1h 25m
2026-05-17 AFL1323 MMK → SVO May 17, 22:40 UTCMay 17, 23:20 UTC40m
2026-05-16 AFL1215 KUF → SVO May 16, 17:50 UTCMay 16, 18:05 UTC15m
2026-05-16 AFL1499 GRV → SVO May 16, 06:41 UTCMay 16, 13:21 UTC6h 40m
2026-05-12 AFL1233 UFA → SVO May 12, 17:55 UTCMay 12, 18:30 UTC35m
2026-05-11 AFL1314 SVO → MRV May 11, 17:35 UTCMay 11, 18:20 UTC45m
2026-05-11 AFL1192 SVO → KZN May 11, 07:20 UTCMay 11, 12:00 UTC4h 40m
2026-05-10 AFL1796 SVO → KGD May 10, 08:15 UTCMay 10, 08:45 UTC30m
2026-05-10 AFL1513 SGC → SVO May 10, 04:39 UTCMay 10, 05:04 UTC25m
2026-05-09 AFL1512 SVO → SGC May 9, 22:45 UTCMay 9, 23:09 UTC25m
2026-05-09 AFL2866 KRR → KZN May 9, 13:15 UTCMay 9, 13:25 UTC10m
2026-05-07 AFL1215 KUF → SVO May 7, 18:00 UTCMay 7, 18:35 UTC35m
2026-05-06 AFL1326 SVO → MMK May 6, 15:10 UTCMay 6, 20:50 UTC5h 40m
2026-05-06 AFL1202 SVO → PEE May 6, 08:25 UTCMay 6, 08:50 UTC25m
2026-05-05 AFL1512 SVO → SGC May 5, 23:05 UTCMay 5, 23:25 UTC20m
2026-05-04 AFL1111 AER → SVO May 4, 07:05 UTCMay 4, 20:25 UTC13h 21m
2026-05-03 AFL7773 - May 3, 20:15 UTCMay 4, 07:25 UTC11h 10m
2026-05-02 AFL1991 EVN → SVO May 2, 11:20 UTCMay 2, 11:45 UTC25m
2026-05-02 AFL1990 SVO → EVN May 2, 09:25 UTCMay 2, 09:35 UTC10m
2026-04-30 AFL1180 SVO → VOG Apr 30, 08:40 UTCApr 30, 09:10 UTC30m
2026-04-29 AFL1132 SVO → AER Apr 29, 15:25 UTCApr 29, 17:40 UTC2h 15m
2026-04-28 AFL1327 MMK → SVO Apr 28, 20:25 UTCApr 28, 20:55 UTC30m
2026-04-28 AFL1110 SVO → AER Apr 28, 05:25 UTCApr 28, 06:05 UTC40m
2026-04-27 AFL1189 VOG → SVO Apr 27, 13:00 UTCApr 27, 13:50 UTC50m
2026-04-27 AFL1188 SVO → VOG Apr 27, 09:00 UTCApr 27, 09:30 UTC30m
2026-04-27 AFL1237 UFA → SVO Apr 27, 05:00 UTCApr 27, 05:25 UTC25m
2026-04-26 AFL799 AYT → UFA Apr 26, 19:00 UTCApr 27, 04:25 UTC9h 25m
2026-04-26 AFL800 GOJ → AYT Apr 26, 17:15 UTCApr 26, 17:40 UTC25m
2026-04-26 AFL801 SVO → KZN Apr 26, 07:00 UTCApr 26, 09:25 UTC2h 25m
2026-04-25 AFL799 AYT → UFA Apr 25, 19:10 UTCApr 26, 04:20 UTC9h 10m
2026-04-25 AFL800 GOJ → AYT Apr 25, 17:20 UTCApr 25, 17:55 UTC35m

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-73172 page for operator, model, and routing details .

Mode-S 151DD4 frequently asked

What is Mode-S code 151DD4?
151DD4 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73172.
Where is Mode-S 151DD4 registered?
Mode-S code 151DD4 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DD4 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DD4, octal 05216724, decimal 1,383,892.
What flights does 151DD4 operate?
Mode-S 151DD4 has broadcast 20 distinct callsigns, including AFL641, AFL601, AFL801, AFL800, AFL799.