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 Jul 26, 20:00 UTC
Flights observed
160
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 20:00 UTC

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
AFL1647 - 4 2026-07-19
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
AFL1423 Aeroflot Russian Airlines 3 2026-07-20
AFL1198 Aeroflot Russian Airlines 3 2026-07-26
AFL1011 Aeroflot Russian Airlines 3 2026-06-02
AFL1010 - 3 2026-04-13
AFL2154 Aeroflot Russian Airlines 2 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFL1198 SVO → KZN Jul 26, 19:40 UTCJul 26, 20:00 UTC20m
2026-07-26 AFL1028 SVO → MRV Jul 26, 10:20 UTCJul 26, 10:35 UTC15m
2026-07-26 AFL1895 OSS → SVO Jul 26, 08:15 UTCJul 26, 08:25 UTC10m
2026-07-25 AFL1894 SVO → OSS Jul 25, 23:35 UTCJul 25, 23:45 UTC10m
2026-07-23 AFL1479 ABA → SVO Jul 23, 04:00 UTCJul 23, 04:40 UTC40m
2026-07-22 AFL1478 SVO → ABA Jul 22, 23:20 UTCJul 23, 02:15 UTC2h 55m
2026-07-22 AFL1478 SVO → ABA Jul 22, 22:05 UTCJul 22, 22:15 UTC10m
2026-07-22 AFL1511 - Jul 22, 01:30 UTCJul 22, 01:50 UTC20m
2026-07-21 AFL1383 HMA → SVO Jul 21, 03:25 UTCJul 22, 01:50 UTC22h 25m
2026-07-20 AFL1383 HMA → SVO Jul 20, 23:30 UTCJul 21, 03:45 UTC4h 14m
2026-07-20 AFL1382 SVO → HMA Jul 20, 22:40 UTCJul 20, 22:45 UTC5m
2026-07-20 AFL1423 CEK → SVO Jul 20, 15:20 UTCJul 20, 18:30 UTC3h 10m
2026-07-20 AFL1015 KGD → SVO Jul 20, 09:00 UTCJul 20, 10:15 UTC1h 15m
2026-07-20 AFL1014 SVO → KGD Jul 20, 06:35 UTCJul 20, 07:15 UTC40m
2026-07-19 AFL1148 SVO → SVO Jul 19, 05:55 UTCJul 19, 06:20 UTC25m
2026-07-19 AFL1647 - Jul 19, 02:25 UTCJul 19, 03:50 UTC1h 25m
2026-07-18 AFL1647 - Jul 18, 06:15 UTCJul 19, 03:50 UTC21h 35m
2026-07-18 AFL1479 - Jul 18, 03:30 UTCJul 19, 02:45 UTC23h 15m
2026-07-17 AFL1423 CEK → SVO Jul 17, 18:10 UTCJul 18, 01:39 UTC7h 30m
2026-07-17 AFL1400 - Jul 17, 06:50 UTCJul 17, 07:00 UTC10m
2026-07-15 AFL1260 - Jul 15, 18:55 UTCJul 15, 19:15 UTC20m
2026-07-15 AFL1887 - Jul 15, 15:10 UTCJul 15, 15:25 UTC15m
2026-07-15 AFL1886 - Jul 15, 06:40 UTCJul 15, 07:00 UTC20m
2026-07-15 AFFL1511 - Jul 15, 01:30 UTCJul 15, 01:55 UTC25m
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

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 Jul 26, 20:00 UTC.
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.