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 Jul 26, 19:45 UTC
Flights observed
203
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 19:45 UTC

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
AFL1451 - 10 2026-07-19
AFL1450 Aeroflot Russian Airlines 9 2026-07-19
AFL1003 - 8 2026-07-16
AFL1002 - 7 2026-07-16
AFL1484 Aeroflot Russian Airlines 6 2026-06-12
AFL1014 - 6 2026-07-16
AFL1887 Aeroflot Russian Airlines 4 2026-05-09
AFL1260 Aeroflot Russian Airlines 4 2026-04-29
AFL1211 - 4 2026-07-21
AFL1025 Aeroflot Russian Airlines 4 2026-06-25
AFL1018 Aeroflot Russian Airlines 4 2026-05-30
AFL1483 Aeroflot Russian Airlines 3 2026-06-06
AFL1416 Aeroflot Russian Airlines 3 2026-07-20
AFL1140 Aeroflot Russian Airlines 3 2026-07-02
AFL1011 Aeroflot Russian Airlines 3 2026-07-22
AFL1006 Aeroflot Russian Airlines 3 2026-06-07
AFL1001 Aeroflot Russian Airlines 3 2026-06-08
AFL1000 Aeroflot Russian Airlines 3 2026-06-08
AFL1886 Aeroflot Russian Airlines 2 2026-04-15
AFL1582 Aeroflot Russian Airlines 2 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFL1008 SVO → KGD Jul 26, 17:45 UTCJul 26, 19:45 UTC2h 0m
2026-07-26 AFL1148 SVO → GDZ Jul 26, 05:55 UTCJul 26, 06:20 UTC25m
2026-07-25 AFL1141 AER → SVO Jul 25, 09:15 UTCJul 25, 09:50 UTC35m
2026-07-23 AFL1642 SVO → SVO Jul 23, 13:05 UTCJul 23, 13:55 UTC50m
2026-07-22 AFL1011 KGD → SVO Jul 22, 18:30 UTCJul 23, 00:35 UTC6h 5m
2026-07-22 AFL1010 SVO → KGD Jul 22, 14:55 UTCJul 22, 16:55 UTC2h 0m
2026-07-22 AFL1033 - Jul 22, 11:10 UTCJul 22, 12:25 UTC1h 15m
2026-07-21 AFL1211 - Jul 21, 09:50 UTCJul 21, 09:55 UTC5m
2026-07-21 AFL1210 - Jul 21, 05:55 UTCJul 21, 06:25 UTC30m
2026-07-20 AFL1008 SVO → KGD Jul 20, 19:10 UTCJul 20, 19:45 UTC35m
2026-07-20 AFL1416 SVO → SVX Jul 20, 06:50 UTCJul 20, 07:15 UTC25m
2026-07-20 AFL1395 PEE → SVO Jul 20, 01:45 UTCJul 20, 02:15 UTC30m
2026-07-19 AFL1394 - Jul 19, 17:55 UTCJul 19, 18:20 UTC25m
2026-07-19 AFL1451 - Jul 19, 06:55 UTCJul 19, 07:20 UTC25m
2026-07-19 AFL1451 - Jul 19, 03:20 UTCJul 19, 03:50 UTC30m
2026-07-19 AFL1450 SVO → KEJ Jul 19, 01:35 UTCJul 19, 02:00 UTC25m
2026-07-18 AFL1459 - Jul 18, 01:15 UTCJul 18, 01:45 UTC30m
2026-07-17 AFL1458 - Jul 17, 23:14 UTCJul 17, 23:39 UTC25m
2026-07-17 AFL1324 SVO → SVO Jul 17, 12:40 UTCJul 17, 13:05 UTC25m
2026-07-16 AFL1014 - Jul 16, 15:45 UTCJul 17, 07:20 UTC15h 35m
2026-07-16 AFL1003 - Jul 16, 12:00 UTCJul 16, 13:54 UTC1h 55m
2026-07-16 AFL1002 - Jul 16, 05:00 UTCJul 16, 10:00 UTC5h 0m
2026-07-15 AFL1512 SVO → SVO Jul 15, 23:15 UTCJul 15, 23:40 UTC25m
2026-07-15 AFL1028 SVO → SVO Jul 15, 09:25 UTCJul 15, 09:55 UTC30m
2026-07-15 AFL1485 - Jul 15, 03:20 UTCJul 15, 06:30 UTC3h 10m
2026-07-12 AFL1451 - Jul 12, 02:20 UTCJul 12, 02:45 UTC25m
2026-07-12 AFL1450 - Jul 12, 00:15 UTCJul 12, 00:50 UTC35m
2026-07-11 AFL1450 SVO → SVO Jul 11, 20:55 UTCJul 11, 21:10 UTC15m
2026-07-11 AFL025 SVO → SVO Jul 11, 19:00 UTCJul 11, 19:10 UTC10m
2026-07-09 AFL10 SVO → SVO Jul 9, 07:10 UTCJul 9, 07:15 UTC5m
2026-07-08 AFL1466 SVO → SVX Jul 8, 23:35 UTCJul 9, 00:10 UTC35m
2026-07-08 AFL1003 - Jul 8, 11:25 UTCJul 8, 12:45 UTC1h 20m
2026-07-08 AFL1002 - Jul 8, 01:25 UTCJul 8, 09:35 UTC8h 10m
2026-07-07 AFL1013 - Jul 7, 16:25 UTCJul 8, 00:10 UTC7h 45m
2026-07-07 AFL1012 - Jul 7, 14:05 UTCJul 7, 14:50 UTC45m
2026-07-07 AFL1032 - Jul 7, 05:55 UTCJul 7, 06:40 UTC45m
2026-07-04 AFL1582 SVO → RGK Jul 4, 23:25 UTCJul 4, 23:50 UTC25m
2026-07-04 AFL1003 - Jul 4, 13:25 UTCJul 4, 15:25 UTC2h 0m
2026-07-04 AFL1002 - Jul 4, 11:05 UTCJul 4, 11:45 UTC40m
2026-07-04 AFL1451 - Jul 4, 01:35 UTCJul 4, 02:05 UTC30m
2026-07-03 AFL1450 - Jul 3, 23:45 UTCJul 4, 00:20 UTC35m
2026-07-02 AFL1140 SVO → AER Jul 2, 15:50 UTCJul 2, 16:35 UTC45m
2026-07-02 AFL1033 - Jul 2, 08:25 UTCJul 2, 10:30 UTC2h 5m
2026-07-02 AFL1032 - Jul 2, 06:15 UTCJul 2, 06:55 UTC40m
2026-07-01 AFL1082 SVO → SVO Jul 1, 10:45 UTCJul 1, 11:15 UTC30m
2026-06-30 AFL1582 SVO → RGK Jun 30, 23:25 UTCJun 30, 23:45 UTC20m
2026-06-27 AFL1510 - Jun 27, 20:04 UTCJun 28, 01:44 UTC5h 40m
2026-06-27 AFL1402 - Jun 27, 08:25 UTCJun 27, 08:44 UTC20m
2026-06-25 AFL1025 KGD → SVO Jun 25, 15:40 UTCJun 26, 05:10 UTC13h 30m
2026-06-25 AFL1024 SVO → KGD Jun 25, 11:35 UTCJun 25, 13:45 UTC2h 10m

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 Jul 26, 19:45 UTC.
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 AFL1451, AFL1450, AFL1003, AFL1002, AFL1484.