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 Jul 25, 15:45 UTC
Flights observed
169
Distinct callsigns
20
Country
RU
Last broadcast
Jul 25, 15:45 UTC

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
AFL601 - 7 2026-06-18
AFL641 Aeroflot Russian Airlines 6 2026-05-30
AFL804 - 3 2026-07-03
AFL801 - 3 2026-07-22
AFL793 - 3 2026-07-23
AFL600 - 3 2026-06-18
AFL1459 - 3 2026-06-24
AFL1215 Aeroflot Russian Airlines 3 2026-06-24
AFL1201 Aeroflot Russian Airlines 3 2026-06-02
AFL1200 Aeroflot Russian Airlines 3 2026-06-13
AFL805 - 2 2026-07-03
AFL800 Aeroflot Russian Airlines 2 2026-04-26
AFL799 Aeroflot Russian Airlines 2 2026-04-26
AFL1871 Aeroflot Russian Airlines 2 2026-06-06
AFL1602 Aeroflot Russian Airlines 2 2026-06-09
AFL1587 Aeroflot Russian Airlines 2 2026-04-15
AFL1568 Aeroflot Russian Airlines 2 2026-05-25
AFL1554 Aeroflot Russian Airlines 2 2026-06-08
AFL1535 Aeroflot Russian Airlines 2 2026-04-22
AFL1517 Aeroflot Russian Airlines 2 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 AFL1606 SVO → KUF Jul 25, 15:25 UTCJul 25, 15:45 UTC20m
2026-07-23 AFL793 - Jul 23, 18:20 UTCJul 24, 01:15 UTC6h 55m
2026-07-23 AFL795 AYT → KZN Jul 23, 02:50 UTCJul 23, 16:50 UTC14h 0m
2026-07-23 AFL792 SVX → AYT Jul 23, 01:05 UTCJul 23, 01:25 UTC20m
2026-07-22 AFL793 - Jul 22, 14:35 UTCJul 22, 16:20 UTC1h 45m
2026-07-22 AFL801 - Jul 22, 02:55 UTCJul 22, 13:15 UTC10h 20m
2026-07-21 AFL793 - Jul 21, 14:25 UTCJul 22, 01:35 UTC11h 10m
2026-07-21 AFL794 KZN → AYT Jul 21, 12:25 UTCJul 21, 12:55 UTC30m
2026-07-16 AFL1465 - Jul 16, 22:49 UTCJul 16, 23:20 UTC30m
2026-07-16 AFL1156 SVO → SVO Jul 16, 09:30 UTCJul 16, 09:55 UTC25m
2026-07-15 AFL1174 SVO → ASF Jul 15, 13:35 UTCJul 15, 14:00 UTC25m
2026-07-11 AFL1334 SVO → SVO Jul 11, 18:25 UTCJul 11, 18:55 UTC30m
2026-07-11 AFL007 SVO → SVO Jul 11, 08:01 UTCJul 11, 08:10 UTC10m
2026-07-11 AFL007 - Jul 11, 07:00 UTCJul 11, 07:25 UTC25m
2026-07-09 AFL1004 - Jul 9, 11:55 UTCJul 9, 12:40 UTC45m
2026-07-09 AFL1004 SVO → SVO Jul 9, 10:50 UTCJul 9, 10:55 UTC5m
2026-07-09 AFL1270 - Jul 9, 03:35 UTCJul 9, 04:00 UTC25m
2026-07-07 AFL1327 - Jul 7, 20:55 UTCJul 7, 21:30 UTC35m
2026-07-05 AFL1268 SVO → SVO Jul 5, 05:20 UTCJul 5, 05:50 UTC30m
2026-07-04 AFL1498 SVO → SVO Jul 4, 06:05 UTCJul 4, 06:30 UTC25m
2026-07-03 AFL2167 - Jul 3, 14:15 UTCJul 3, 16:05 UTC1h 50m
2026-07-03 AFL804 - Jul 3, 12:10 UTCJul 3, 12:50 UTC40m
2026-07-03 AFL804 - Jul 3, 11:10 UTCJul 3, 11:30 UTC20m
2026-07-03 AFL805 - Jul 3, 07:10 UTCJul 3, 08:45 UTC1h 35m
2026-07-02 AFL2166 - Jul 2, 14:55 UTCJul 3, 05:45 UTC14h 50m
2026-07-01 AFL2858 KRR → KJA Jul 1, 22:30 UTCJul 2, 13:15 UTC14h 45m
2026-06-30 AFL1837 - Jun 30, 14:30 UTCJun 30, 14:45 UTC15m
2026-06-29 AFL1314 SVO → SVO Jun 29, 16:50 UTCJun 29, 17:34 UTC45m
2026-06-28 AFL1867 EVN → SVO Jun 28, 11:25 UTCJun 28, 11:50 UTC25m
2026-06-27 AFL018 SVO → SVO Jun 27, 09:09 UTCJun 27, 10:10 UTC1h 0m
2026-06-26 AFL1246 SVO → SVO Jun 26, 15:05 UTCJun 26, 15:39 UTC35m
2026-06-26 AFL613 - Jun 26, 06:35 UTCJun 26, 07:10 UTC35m
2026-06-25 AFL813 - Jun 25, 22:59 UTCJun 25, 23:34 UTC35m
2026-06-25 AFL812 MRV → IST Jun 25, 20:30 UTCJun 25, 20:59 UTC30m
2026-06-25 AFL805 SVO → OVB Jun 25, 15:15 UTCJun 25, 16:55 UTC1h 40m
2026-06-24 AFL804 KZN → SVO Jun 24, 23:10 UTCJun 25, 13:50 UTC14h 40m
2026-06-24 AFL1215 KUF → SVO Jun 24, 16:54 UTCJun 24, 17:05 UTC10m
2026-06-24 AFL1459 - Jun 24, 01:04 UTCJun 24, 01:34 UTC30m
2026-06-23 AFL1458 - Jun 23, 23:10 UTCJun 23, 23:44 UTC35m
2026-06-22 AFL1459 - Jun 22, 21:35 UTCJun 22, 21:54 UTC20m
2026-06-22 AFL1459 - Jun 22, 03:10 UTCJun 22, 03:40 UTC30m
2026-06-21 AFL1458 - Jun 21, 23:24 UTCJun 21, 23:55 UTC30m
2026-06-18 AFL601 - Jun 18, 12:20 UTCJun 18, 13:05 UTC45m
2026-06-18 AFL600 - Jun 18, 10:25 UTCJun 18, 10:35 UTC10m
2026-06-17 AFL601 - Jun 17, 19:45 UTCJun 17, 20:35 UTC50m
2026-06-16 AFL1245 REN → SVO Jun 16, 02:50 UTCJun 16, 03:00 UTC10m
2026-06-15 AFL1245 REN → SVO Jun 15, 23:15 UTCJun 16, 02:15 UTC3h 0m
2026-06-15 AFL1244 SVO → REN Jun 15, 22:00 UTCJun 15, 22:35 UTC35m
2026-06-15 AFL1106 SVO → KRR Jun 15, 02:55 UTCJun 15, 03:24 UTC30m
2026-06-13 AFL1183 VOG → SVO Jun 13, 21:00 UTCJun 13, 21:55 UTC55m

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 Jul 25, 15:45 UTC.
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 AFL601, AFL641, AFL804, AFL801, AFL793.