Apparatus

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sensors Mode-S transponder

151FF9

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73721 · AIRBUS A-321

Hex
151FF9
Octal
05217771
Decimal
1,384,441
Country
RU
Tail
RA-73721
Type
A321
No current signal · last broadcast 42m ago
Flights observed
188
Distinct callsigns
20
Country
RU
Last broadcast
42m ago

Last known position

Most recent position reported by Mode-S 151FF9.

Country allocation

The ICAO 24-bit address 151FF9 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
AFL2142 - 10 2026-07-07
AFL2143 - 8 2026-07-08
AFL615 - 5 2026-07-12
AFL1883 Aeroflot Russian Airlines 5 2026-05-17
AFL2130 - 4 2026-07-05
AFL1861 - 4 2026-07-12
AFL1530 Aeroflot Russian Airlines 4 2026-06-02
AFL1261 Aeroflot Russian Airlines 4 2026-05-20
AFL1011 - 4 2026-07-14
AFL1002 - 4 2026-07-14
AFL1869 - 3 2026-07-04
AFL1868 Aeroflot Russian Airlines 3 2026-05-20
AFL1483 Aeroflot Russian Airlines 3 2026-06-11
AFL1028 Aeroflot Russian Airlines 3 2026-06-08
AFL1024 Aeroflot Russian Airlines 3 2026-06-20
AFL1018 - 3 2026-07-06
AFL1017 Aeroflot Russian Airlines 3 2026-05-10
AFL1008 - 3 2026-07-01
AFL1003 - 3 2026-07-14
AFL614 Aeroflot Russian Airlines 2 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFL1011 - Jul 14, 18:30 UTCJul 14, 20:10 UTC1h 40m
2026-07-14 AFL1003 - Jul 14, 11:10 UTCJul 14, 16:40 UTC5h 30m
2026-07-14 AFL1002 - Jul 14, 08:45 UTCJul 14, 09:30 UTC45m
2026-07-12 AFL1861 - Jul 12, 16:45 UTCJul 12, 17:10 UTC25m
2026-07-12 AFL615 - Jul 12, 10:40 UTCJul 12, 11:35 UTC55m
2026-07-11 AFL2145 - Jul 11, 17:30 UTCJul 11, 19:15 UTC1h 45m
2026-07-11 AFL2144 - Jul 11, 15:10 UTCJul 11, 15:50 UTC40m
2026-07-11 AFL2144 SVO → SVO Jul 11, 10:50 UTCJul 11, 11:15 UTC25m
2026-07-11 AFL2171 - Jul 11, 04:45 UTCJul 11, 05:20 UTC35m
2026-07-10 AFL2171 - Jul 10, 04:50 UTCJul 10, 05:20 UTC30m
2026-07-10 AFL2170 - Jul 10, 02:25 UTCJul 10, 02:35 UTC10m
2026-07-09 AFL1491 KJA → SVO Jul 9, 12:55 UTCJul 9, 15:45 UTC2h 50m
2026-07-09 AFL1490 SVO → KJA Jul 9, 09:20 UTCJul 9, 09:35 UTC15m
2026-07-08 AFL2143 - Jul 8, 11:25 UTCJul 8, 13:15 UTC1h 50m
2026-07-07 AFL2142 - Jul 7, 20:20 UTCJul 8, 09:40 UTC13h 20m
2026-07-06 AFL1019 - Jul 6, 13:05 UTCJul 6, 14:20 UTC1h 15m
2026-07-06 AFL1018 - Jul 6, 10:30 UTCJul 6, 11:10 UTC40m
2026-07-05 AFL2131 - Jul 5, 14:45 UTCJul 5, 15:10 UTC25m
2026-07-05 AFL2130 - Jul 5, 12:20 UTCJul 5, 12:35 UTC15m
2026-07-05 AFL2130 SVO → SVO Jul 5, 08:00 UTCJul 5, 08:25 UTC25m
2026-07-04 AFL1869 - Jul 4, 21:25 UTCJul 4, 21:55 UTC30m
2026-07-04 AFL1867 - Jul 4, 11:50 UTCJul 4, 12:20 UTC30m
2026-07-04 AFL1866 SVO → EVN Jul 4, 10:00 UTCJul 4, 10:10 UTC10m
2026-07-04 AFL1866 SVO → EVN Jul 4, 07:20 UTCJul 4, 07:45 UTC25m
2026-07-04 AFL2133 - Jul 4, 01:25 UTCJul 4, 01:55 UTC30m
2026-07-03 AFL2132 - Jul 3, 23:05 UTCJul 3, 23:15 UTC10m
2026-07-02 AFL1009 - Jul 2, 01:30 UTCJul 2, 02:25 UTC55m
2026-07-01 AFL1008 - Jul 1, 17:35 UTCJul 1, 19:50 UTC2h 15m
2026-06-30 AFL1886 - Jun 30, 07:15 UTCJun 30, 15:20 UTC8h 5m
2026-06-28 AFL2143 - Jun 28, 11:19 UTCJun 28, 13:14 UTC1h 55m
2026-06-27 AFL2142 - Jun 27, 21:25 UTCJun 28, 09:20 UTC11h 55m
2026-06-27 AFL615 - Jun 27, 10:25 UTCJun 27, 11:55 UTC1h 30m
2026-06-26 AFL2131 IST → SVO Jun 26, 15:05 UTCJun 26, 15:39 UTC35m
2026-06-26 AFL2130 - Jun 26, 12:19 UTCJun 26, 12:39 UTC20m
2026-06-26 AFL2130 SVO → SVO Jun 26, 08:24 UTCJun 26, 08:45 UTC20m
2026-06-25 AFL1420 SVO → CEK Jun 25, 19:20 UTCJun 25, 19:49 UTC30m
2026-06-25 AFL2143 - Jun 25, 11:10 UTCJun 25, 13:00 UTC1h 50m
2026-06-25 AFL2142 - Jun 25, 08:45 UTCJun 25, 09:14 UTC30m
2026-06-24 AFL1002 - Jun 24, 07:30 UTCJun 24, 09:29 UTC2h 0m
2026-06-22 AFL1867 EVN → SVO Jun 22, 15:40 UTCJun 22, 16:10 UTC30m
2026-06-21 AFL1006 SVO → KGD Jun 21, 08:30 UTCJun 21, 18:04 UTC9h 35m
2026-06-20 AFL1420 SVO → CEK Jun 20, 19:19 UTCJun 21, 08:35 UTC13h 15m
2026-06-20 AFL1025 KGD → SVO Jun 20, 15:29 UTCJun 20, 16:34 UTC1h 5m
2026-06-20 AFL1024 SVO → KGD Jun 20, 12:34 UTCJun 20, 13:39 UTC1h 5m
2026-06-20 AFL1024 SVO → KGD Jun 20, 11:34 UTCJun 20, 11:44 UTC10m
2026-06-20 AFL1457 - Jun 20, 03:09 UTCJun 20, 03:39 UTC30m
2026-06-18 AFL1861 EVN → SVO Jun 18, 20:05 UTCJun 18, 20:35 UTC30m
2026-06-18 AFL615 - Jun 18, 14:30 UTCJun 18, 15:15 UTC45m
2026-06-16 AFL2147 AYT → SVO Jun 16, 15:45 UTCJun 17, 08:50 UTC17h 6m
2026-06-16 AFL2146 - Jun 16, 13:40 UTCJun 16, 14:09 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-73721 page for operator, model, and routing details .

Mode-S 151FF9 frequently asked

What is Mode-S code 151FF9?
151FF9 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73721.
Where is Mode-S 151FF9 registered?
Mode-S code 151FF9 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FF9 broadcasting right now?
No active broadcast right now. Last signal was 42m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FF9, octal 05217771, decimal 1,384,441.
What flights does 151FF9 operate?
Mode-S 151FF9 has broadcast 20 distinct callsigns, including AFL2142, AFL2143, AFL615, AFL1883, AFL2130.