Apparatus

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sensors Mode-S transponder

151FF4

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73716 · AIRBUS A-321

Hex
151FF4
Octal
05217764
Decimal
1,384,436
Country
RU
Tail
RA-73716
Type
A321
No current signal · last broadcast 8h ago
Flights observed
67
Distinct callsigns
20
Country
RU
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 151FF4.

Country allocation

The ICAO 24-bit address 151FF4 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
AFL2146 Aeroflot Russian Airlines 3 2026-05-04
AFL2144 Aeroflot Russian Airlines 3 2026-05-09
AFL1010 - 3 2026-04-13
AFL2143 Aeroflot Russian Airlines 2 2026-05-27
AFL2142 Aeroflot Russian Airlines 2 2026-05-27
AFL1865 Aeroflot Russian Airlines 2 2026-05-24
AFL1861 Aeroflot Russian Airlines 2 2026-05-02
AFL1484 Aeroflot Russian Airlines 2 2026-04-23
AFL1421 Aeroflot Russian Airlines 2 2026-04-17
AFL1300 Aeroflot Russian Airlines 2 2026-05-16
AFL1199 Aeroflot Russian Airlines 2 2026-04-25
AFL1198 Aeroflot Russian Airlines 2 2026-05-29
AFL1017 Aeroflot Russian Airlines 2 2026-04-28
AFL1011 - 2 2026-04-13
AFL1009 Aeroflot Russian Airlines 2 2026-05-21
AFL1008 Aeroflot Russian Airlines 2 2026-05-01
AFL7350 - 1 2026-05-06
AFL615 Aeroflot Russian Airlines 1 2026-04-19
AFL614 Aeroflot Russian Airlines 1 2026-05-02
AFL2147 Aeroflot Russian Airlines 1 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AFL1198 SVO → KZN May 29, 19:45 UTCMay 29, 20:15 UTC30m
2026-05-29 AFL1192 SVO → KZN May 29, 00:10 UTCMay 29, 12:40 UTC12h 30m
2026-05-27 AFL2143 AYT → SVO May 27, 11:15 UTCMay 28, 03:45 UTC16h 30m
2026-05-27 AFL2142 SVO → AYT May 27, 08:55 UTCMay 27, 09:15 UTC20m
2026-05-26 AFL2134 SVO → IST May 26, 18:19 UTCMay 26, 18:30 UTC10m
2026-05-26 AFL1517 SGC → SVO May 26, 09:35 UTCMay 26, 09:49 UTC15m
2026-05-25 AFL1128 SVO → AER May 25, 16:00 UTCMay 25, 16:25 UTC25m
2026-05-24 AFL1865 EVN → SVO May 24, 18:35 UTCMay 24, 19:00 UTC25m
2026-05-23 AFL1865 EVN → SVO May 23, 18:40 UTCMay 23, 19:15 UTC35m
2026-05-23 AFL1864 SVO → EVN May 23, 16:50 UTCMay 23, 17:00 UTC10m
2026-05-21 AFL1007 KGD → SVO May 21, 03:05 UTCMay 21, 22:15 UTC19h 10m
2026-05-21 AFL1009 KGD → SVO May 21, 01:35 UTCMay 21, 22:15 UTC20h 40m
2026-05-18 AFL1438 SVO → MQF May 18, 14:25 UTCMay 18, 14:55 UTC30m
2026-05-18 AFL1472 SVO → NJC May 18, 00:55 UTCMay 18, 01:15 UTC20m
2026-05-16 AFL1300 SVO → MRV May 16, 13:21 UTCMay 16, 13:35 UTC15m
2026-05-16 AFL010 SVO → LED May 16, 07:05 UTCMay 16, 07:25 UTC20m
2026-05-15 AFL1325 MMK → SVO May 15, 05:35 UTCMay 15, 17:10 UTC11h 34m
2026-05-10 AFL1003 KGD → SVO May 10, 11:30 UTCMay 10, 13:05 UTC1h 35m
2026-05-09 AFL2145 AYT → SVO May 9, 17:55 UTCMay 10, 09:35 UTC15h 40m
2026-05-09 AFL2144 SVO → AYT May 9, 16:00 UTCMay 9, 16:20 UTC20m
2026-05-09 AFL2144 SVO → AYT May 9, 13:05 UTCMay 9, 15:15 UTC2h 10m
2026-05-09 AFL2144 SVO → AYT May 9, 11:00 UTCMay 9, 11:25 UTC25m
2026-05-06 AFL7350 SVO → SVO May 6, 11:35 UTCMay 6, 12:05 UTC30m
2026-05-04 AFL2147 AYT → SVO May 4, 15:05 UTCMay 4, 17:00 UTC1h 55m
2026-05-04 AFL2146 SVO → AYT May 4, 13:05 UTCMay 4, 13:25 UTC20m
2026-05-04 AFL2146 SVO → AYT May 4, 11:45 UTCMay 4, 12:20 UTC35m
2026-05-03 AFL2146 SVO → AYT May 3, 16:25 UTCMay 4, 12:20 UTC19h 55m
2026-05-02 AFL1861 EVN → SVO May 2, 16:20 UTCMay 2, 16:45 UTC25m
2026-05-02 AFL614 KRR → EVN May 2, 14:30 UTCMay 2, 14:40 UTC10m
2026-05-02 AFL1009 KGD → SVO May 2, 01:35 UTCMay 2, 11:00 UTC9h 25m
2026-05-01 AFL1008 SVO → KGD May 1, 12:30 UTCMay 1, 19:40 UTC7h 10m
2026-04-29 AFL1300 SVO → MRV Apr 29, 12:55 UTCApr 29, 13:25 UTC30m
2026-04-28 AFL027 LED → SVO Apr 28, 19:45 UTCApr 28, 20:00 UTC15m
2026-04-28 AFL024 - Apr 28, 15:20 UTCApr 28, 15:40 UTC20m
2026-04-28 AFL1017 KGD → SVO Apr 28, 10:20 UTCApr 28, 12:30 UTC2h 10m
2026-04-27 AFL1008 SVO → KGD Apr 27, 23:35 UTCApr 27, 23:45 UTC10m
2026-04-27 AFL1113 - Apr 27, 16:15 UTCApr 27, 17:00 UTC45m
2026-04-27 AFL1112 SVO → KRR Apr 27, 08:25 UTCApr 27, 08:35 UTC10m
2026-04-25 AFL1199 KZN → SVO Apr 25, 08:15 UTCApr 25, 08:45 UTC30m
2026-04-23 AFL1484 SVO → KJA Apr 23, 21:20 UTCApr 24, 06:30 UTC9h 10m
2026-04-23 AFL1423 CEK → SVO Apr 23, 19:05 UTCApr 23, 19:30 UTC25m
2026-04-23 AFL1422 SVO → CEK Apr 23, 13:50 UTCApr 23, 18:20 UTC4h 29m
2026-04-23 AFL1052 SVO → MCX Apr 23, 05:20 UTCApr 23, 05:45 UTC25m
2026-04-22 AFL1831 MSQ → SVO Apr 22, 08:40 UTCApr 22, 09:15 UTC35m
2026-04-22 AFL1830 SVO → MSQ Apr 22, 06:25 UTCApr 22, 06:35 UTC10m
2026-04-21 AFL1261 UFA → SVO Apr 21, 18:20 UTCApr 22, 03:25 UTC9h 5m
2026-04-21 AFL2143 AYT → SVO Apr 21, 11:05 UTCApr 21, 13:05 UTC2h 0m
2026-04-21 AFL2142 SVO → AYT Apr 21, 09:10 UTCApr 21, 09:25 UTC15m
2026-04-20 AFL1017 KGD → SVO Apr 20, 09:45 UTCApr 20, 12:00 UTC2h 15m
2026-04-20 AFL1016 SVO → KGD Apr 20, 06:15 UTCApr 20, 06:45 UTC30m

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-73716 page for operator, model, and routing details .

Mode-S 151FF4 frequently asked

What is Mode-S code 151FF4?
151FF4 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73716.
Where is Mode-S 151FF4 registered?
Mode-S code 151FF4 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FF4 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 151FF4, octal 05217764, decimal 1,384,436.
What flights does 151FF4 operate?
Mode-S 151FF4 has broadcast 20 distinct callsigns, including AFL2146, AFL2144, AFL1010, AFL2143, AFL2142.