Apparatus

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sensors Mode-S transponder

151FFB

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73723 · AIRBUS A-321

Hex
151FFB
Octal
05217773
Decimal
1,384,443
Country
RU
Tail
RA-73723
Type
A321
No current signal · last broadcast 2h ago
Flights observed
109
Distinct callsigns
20
Country
RU
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 151FFB.

Country allocation

The ICAO 24-bit address 151FFB 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
AFL1484 Aeroflot Russian Airlines 5 2026-05-20
AFL1014 Aeroflot Russian Airlines 5 2026-05-29
AFL1887 Aeroflot Russian Airlines 4 2026-05-09
AFL1451 Aeroflot Russian Airlines 4 2026-05-10
AFL1260 Aeroflot Russian Airlines 4 2026-04-29
AFL1018 Aeroflot Russian Airlines 4 2026-05-30
AFL1003 Aeroflot Russian Airlines 4 2026-05-22
AFL1450 Aeroflot Russian Airlines 3 2026-05-09
AFL1025 Aeroflot Russian Airlines 3 2026-05-27
AFL1886 Aeroflot Russian Airlines 2 2026-04-15
AFL1531 Aeroflot Russian Airlines 2 2026-04-17
AFL1530 Aeroflot Russian Airlines 2 2026-04-16
AFL1517 Aeroflot Russian Airlines 2 2026-05-20
AFL1487 - 2 2026-04-16
AFL1486 Aeroflot Russian Airlines 2 2026-04-16
AFL1423 Aeroflot Russian Airlines 2 2026-04-28
AFL1421 Aeroflot Russian Airlines 2 2026-04-16
AFL1420 - 2 2026-04-15
AFL1322 Aeroflot Russian Airlines 2 2026-05-05
AFL1108 Aeroflot Russian Airlines 2 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AFL1018 SVO → KGD May 30, 09:00 UTCMay 30, 11:05 UTC2h 5m
2026-05-29 AFL1473 NJC → SVO May 29, 23:50 UTCMay 30, 06:35 UTC6h 45m
2026-05-29 AFL1472 SVO → NJC May 29, 22:50 UTCMay 29, 23:20 UTC30m
2026-05-29 AFL1124 SVO → AER May 29, 13:05 UTCMay 29, 13:45 UTC40m
2026-05-29 AFL1015 KGD → SVO May 29, 09:20 UTCMay 29, 11:25 UTC2h 5m
2026-05-29 AFL1014 SVO → KGD May 29, 06:15 UTCMay 29, 07:05 UTC50m
2026-05-29 AFL1014 SVO → KGD May 29, 05:10 UTCMay 29, 05:35 UTC25m
2026-05-28 AFL1301 MRV → SVO May 28, 20:15 UTCMay 28, 20:40 UTC25m
2026-05-28 AFL1014 SVO → KGD May 28, 06:25 UTCMay 28, 07:05 UTC40m
2026-05-28 AFL1014 SVO → KGD May 28, 05:05 UTCMay 28, 05:35 UTC30m
2026-05-27 AFL1025 KGD → SVO May 27, 15:40 UTCMay 27, 22:35 UTC6h 55m
2026-05-27 AFL1001 KGD → SVO May 27, 07:40 UTCMay 27, 13:15 UTC5h 35m
2026-05-27 AFL1000 SVO → KGD May 27, 04:55 UTCMay 27, 05:49 UTC55m
2026-05-26 AFL1014 SVO → KGD May 26, 01:24 UTCMay 26, 07:15 UTC5h 50m
2026-05-25 AFL1510 SVO → SGC May 25, 19:15 UTCMay 25, 19:30 UTC15m
2026-05-25 AFL1025 KGD → SVO May 25, 15:20 UTCMay 25, 17:15 UTC1h 55m
2026-05-25 AFL1024 SVO → KGD May 25, 11:25 UTCMay 25, 13:40 UTC2h 15m
2026-05-25 AFL1001 KGD → SVO May 25, 07:30 UTCMay 25, 09:20 UTC1h 50m
2026-05-25 AFL1000 SVO → KGD May 25, 05:20 UTCMay 25, 06:00 UTC40m
2026-05-24 AFL1310 SVO → MRV May 24, 10:45 UTCMay 24, 11:15 UTC30m
2026-05-23 AFL1128 SVO → AER May 23, 16:05 UTCMay 23, 16:50 UTC45m
2026-05-22 AFL1007 KGD → SVO May 22, 19:45 UTCMay 22, 21:00 UTC1h 15m
2026-05-22 AFL1006 SVO → KGD May 22, 17:05 UTCMay 22, 18:00 UTC55m
2026-05-22 AFL1003 KGD → SVO May 22, 14:05 UTCMay 22, 14:15 UTC10m
2026-05-22 AFL1003 KGD → SVO May 22, 11:20 UTCMay 22, 12:50 UTC1h 31m
2026-05-22 AFL1002 SVO → KGD May 22, 08:50 UTCMay 22, 09:30 UTC40m
2026-05-21 AFL1018 SVO → KGD May 21, 00:40 UTCMay 21, 11:35 UTC10h 55m
2026-05-20 AFL1484 SVO → KJA May 20, 21:15 UTCMay 20, 21:45 UTC30m
2026-05-20 AFL1517 SGC → SVO May 20, 09:30 UTCMay 20, 09:45 UTC15m
2026-05-18 AFL1264 SVO → KRR May 18, 02:35 UTCMay 18, 03:10 UTC35m
2026-05-17 AFL1003 KGD → SVO May 17, 12:35 UTCMay 17, 13:55 UTC1h 20m
2026-05-16 AFL1011 KGD → SVO May 16, 18:35 UTCMay 17, 11:01 UTC16h 25m
2026-05-16 AFL1010 SVO → KGD May 16, 16:15 UTCMay 16, 16:55 UTC40m
2026-05-16 AFL1003 KGD → SVO May 16, 11:01 UTCMay 16, 12:25 UTC1h 25m
2026-05-16 AFL1002 SVO → KGD May 16, 07:31 UTCMay 16, 09:31 UTC2h 0m
2026-05-15 AFL1018 SVO → KGD May 15, 10:25 UTCMay 15, 11:10 UTC45m
2026-05-14 AFL1052 SVO → MCX May 14, 05:20 UTCMay 14, 06:20 UTC1h 0m
2026-05-13 AFL1109 KRR → SVO May 13, 14:05 UTCMay 13, 14:30 UTC25m
2026-05-13 AFL1108 SVO → KRR May 13, 05:45 UTCMay 13, 06:00 UTC15m
2026-05-11 AFL1517 SGC → SVO May 11, 17:50 UTCMay 12, 11:00 UTC17h 10m
2026-05-11 AFL1018 SVO → KGD May 11, 00:49 UTCMay 11, 11:50 UTC11h 0m
2026-05-10 AFL1484 SVO → KJA May 10, 21:30 UTCMay 10, 21:54 UTC25m
2026-05-10 AFL1209 KRR → SVO May 10, 13:10 UTCMay 10, 13:25 UTC15m
2026-05-10 AFL1208 SVO → KRR May 10, 07:50 UTCMay 10, 08:20 UTC30m
2026-05-10 AFL1451 KEJ → SVO May 10, 05:45 UTCMay 10, 05:55 UTC10m
2026-05-10 AFL1451 KEJ → SVO May 10, 01:20 UTCMay 10, 04:45 UTC3h 25m
2026-05-09 AFL1450 SVO → KEJ May 9, 20:15 UTCMay 9, 23:50 UTC3h 35m
2026-05-09 AFL1887 FRU → SVO May 9, 03:40 UTCMay 9, 16:00 UTC12h 20m
2026-05-05 AFL1322 SVO → MMK May 5, 20:20 UTCMay 6, 11:40 UTC15h 20m
2026-05-05 AFL1322 SVO → MMK May 5, 19:05 UTCMay 5, 19:15 UTC10m

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-73723 page for operator, model, and routing details .

Mode-S 151FFB frequently asked

What is Mode-S code 151FFB?
151FFB is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73723.
Where is Mode-S 151FFB registered?
Mode-S code 151FFB is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FFB broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FFB, octal 05217773, decimal 1,384,443.
What flights does 151FFB operate?
Mode-S 151FFB has broadcast 20 distinct callsigns, including AFL1484, AFL1014, AFL1887, AFL1451, AFL1260.