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 5h ago
Flights observed
136
Distinct callsigns
20
Country
RU
Last broadcast
5h 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
AFL2145 - 7 2026-07-07
AFL2144 - 7 2026-07-07
AFL2142 - 7 2026-06-21
AFL2146 Aeroflot Russian Airlines 6 2026-05-30
AFL2171 - 5 2026-07-09
AFL1009 Aeroflot Russian Airlines 5 2026-06-02
AFL2170 - 4 2026-07-09
AFL2143 - 4 2026-06-20
AFL1861 Aeroflot Russian Airlines 4 2026-06-11
AFL615 Aeroflot Russian Airlines 3 2026-06-11
AFL614 Aeroflot Russian Airlines 3 2026-06-11
AFL2169 Aeroflot Russian Airlines 3 2026-06-28
AFL2168 Aeroflot Russian Airlines 3 2026-06-28
AFL1484 - 3 2026-07-04
AFL1011 Aeroflot Russian Airlines 3 2026-06-02
AFL1010 - 3 2026-04-13
AFL2154 Aeroflot Russian Airlines 2 2026-06-24
AFL2147 Aeroflot Russian Airlines 2 2026-05-30
AFL1865 Aeroflot Russian Airlines 2 2026-05-24
AFL1860 Aeroflot Russian Airlines 2 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFL1459 - Jul 14, 01:15 UTCJul 14, 01:45 UTC30m
2026-07-13 AFL1111 AER → SVO Jul 13, 03:55 UTCJul 13, 04:05 UTC10m
2026-07-10 AFL1012 - Jul 10, 13:50 UTCJul 10, 14:35 UTC45m
2026-07-09 AFL2171 - Jul 9, 05:05 UTCJul 9, 05:35 UTC30m
2026-07-09 AFL2170 - Jul 9, 02:40 UTCJul 9, 02:50 UTC10m
2026-07-08 AFL1867 - Jul 8, 11:30 UTCJul 8, 11:55 UTC25m
2026-07-07 AFL2145 - Jul 7, 18:15 UTCJul 7, 18:35 UTC20m
2026-07-07 AFL2144 - Jul 7, 15:50 UTCJul 7, 16:15 UTC25m
2026-07-04 AFL1484 - Jul 4, 21:30 UTCJul 5, 15:35 UTC18h 5m
2026-07-04 AFL1325 MMK → SVO Jul 4, 16:30 UTCJul 4, 17:05 UTC35m
2026-07-03 AFL2171 - Jul 3, 04:50 UTCJul 3, 05:20 UTC30m
2026-07-03 AFL2170 - Jul 3, 02:20 UTCJul 3, 02:30 UTC10m
2026-07-01 AFL1647 - Jul 1, 03:30 UTCJul 1, 03:45 UTC15m
2026-06-28 AFL2169 DLM → SVO Jun 28, 19:04 UTCJun 29, 14:09 UTC19h 5m
2026-06-28 AFL2169 DLM → SVO Jun 28, 17:34 UTCJun 29, 14:09 UTC20h 35m
2026-06-28 AFL2168 SVO → DLM Jun 28, 15:20 UTCJun 28, 15:44 UTC25m
2026-06-27 AFL2168 SVO → DLM Jun 27, 19:05 UTCJun 28, 15:44 UTC20h 40m
2026-06-27 AFL2145 AYT → SVO Jun 27, 17:29 UTCJun 28, 15:44 UTC22h 15m
2026-06-27 AFL2171 - Jun 27, 04:49 UTCJun 27, 15:30 UTC10h 40m
2026-06-27 AFL2170 - Jun 27, 02:35 UTCJun 27, 02:55 UTC20m
2026-06-25 AFL1033 KGD → SVO Jun 25, 09:05 UTCJun 26, 03:45 UTC18h 40m
2026-06-25 AFL1033 KGD → SVO Jun 25, 08:24 UTCJun 26, 03:45 UTC19h 20m
2026-06-24 AFL2155 IST → SVO Jun 24, 15:54 UTCJun 25, 06:35 UTC14h 40m
2026-06-24 AFL2154 SVO → IST Jun 24, 13:20 UTCJun 24, 14:09 UTC50m
2026-06-24 AFL2154 SVO → IST Jun 24, 09:29 UTCJun 24, 09:59 UTC30m
2026-06-22 AFL1946 SVO → SVO Jun 22, 11:30 UTCJun 22, 11:44 UTC15m
2026-06-21 AFL2142 SVO → SVO Jun 21, 04:44 UTCJun 21, 05:30 UTC45m
2026-06-20 AFL2143 - Jun 20, 11:34 UTCJun 20, 13:04 UTC1h 30m
2026-06-20 AFL2142 - Jun 20, 04:54 UTCJun 20, 09:29 UTC4h 35m
2026-06-19 AFL2145 AYT → SVO Jun 19, 17:49 UTCJun 19, 19:19 UTC1h 30m
2026-06-19 AFL2144 SVO → AYT Jun 19, 14:29 UTCJun 19, 16:25 UTC1h 55m
2026-06-17 AFL2143 - Jun 17, 11:25 UTCJun 17, 13:20 UTC1h 55m
2026-06-17 AFL2142 - Jun 17, 09:05 UTCJun 17, 09:45 UTC40m
2026-06-15 AFL1647 NJC → SVO Jun 15, 20:50 UTCJun 16, 03:30 UTC6h 40m
2026-06-13 AFL2145 AYT → SVO Jun 13, 19:05 UTCJun 14, 07:25 UTC12h 21m
2026-06-13 AFL2145 AYT → SVO Jun 13, 12:35 UTCJun 14, 07:25 UTC18h 51m
2026-06-13 AFL2171 IST → SVO Jun 13, 05:15 UTCJun 13, 05:50 UTC35m
2026-06-12 AFL1122 SVO → AER Jun 12, 12:10 UTCJun 12, 12:45 UTC35m
2026-06-11 AFL1861 EVN → SVO Jun 11, 17:25 UTCJun 11, 18:30 UTC1h 5m
2026-06-11 AFL614 KRR → EVN Jun 11, 15:20 UTCJun 11, 15:40 UTC20m
2026-06-11 AFL615 EVN → KRR Jun 11, 10:45 UTCJun 11, 11:35 UTC50m
2026-06-11 AFL1860 SVO → EVN Jun 11, 05:55 UTCJun 11, 06:25 UTC30m
2026-06-07 AFL2169 DLM → SVO Jun 7, 17:55 UTCJun 7, 18:20 UTC25m
2026-06-07 AFL2168 SVO → DLM Jun 7, 06:50 UTCJun 7, 16:10 UTC9h 20m
2026-06-06 AFL1894 SVO → OSS Jun 6, 22:30 UTCJun 6, 23:00 UTC30m
2026-06-06 AFL1861 EVN → SVO Jun 6, 16:30 UTCJun 6, 17:34 UTC1h 5m
2026-06-06 AFL614 KRR → EVN Jun 6, 14:50 UTCJun 6, 14:59 UTC10m
2026-06-06 AFL615 EVN → KRR Jun 6, 10:14 UTCJun 6, 11:14 UTC1h 0m
2026-06-05 AFL1394 SVO → PEE Jun 5, 20:20 UTCJun 5, 20:55 UTC35m
2026-06-05 AFL1028 SVO → MRV Jun 5, 10:00 UTCJun 5, 10:15 UTC15m

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 5h 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 AFL2145, AFL2144, AFL2142, AFL2146, AFL2171.