Apparatus

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sensors Mode-S transponder

151FEA

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73706 · AIRBUS A-321

Hex
151FEA
Octal
05217752
Decimal
1,384,426
Country
RU
Tail
RA-73706
Type
A321
No current signal · last broadcast 37m ago
Flights observed
89
Distinct callsigns
20
Country
RU
Last broadcast
37m ago

Last known position

Most recent position reported by Mode-S 151FEA.

Country allocation

The ICAO 24-bit address 151FEA 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
AFL2136 Aeroflot Russian Airlines 9 2026-05-29
AFL2137 Aeroflot Russian Airlines 6 2026-05-29
AFL2134 Aeroflot Russian Airlines 6 2026-05-27
AFL1137 Aeroflot Russian Airlines 6 2026-05-23
AFL1943 Aeroflot Russian Airlines 5 2026-05-22
AFL1487 - 4 2026-04-21
AFL2126 Aeroflot Russian Airlines 3 2026-05-10
AFL1963 Aeroflot Russian Airlines 3 2026-04-29
AFL1942 Aeroflot Russian Airlines 3 2026-05-23
AFL1524 Aeroflot Russian Airlines 3 2026-05-17
AFL1481 Aeroflot Russian Airlines 3 2026-04-27
AFL1136 Aeroflot Russian Airlines 3 2026-05-17
AFL2135 Aeroflot Russian Airlines 2 2026-05-27
AFL2127 Aeroflot Russian Airlines 2 2026-05-10
AFL1941 Aeroflot Russian Airlines 2 2026-05-17
AFL1940 Aeroflot Russian Airlines 2 2026-05-06
AFL1525 Aeroflot Russian Airlines 2 2026-04-16
AFL1482 Aeroflot Russian Airlines 2 2026-04-24
AFL1313 - 2 2026-04-19
AFL1138 Aeroflot Russian Airlines 2 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AFL2137 IST → SVO May 29, 13:00 UTCMay 30, 02:10 UTC13h 10m
2026-05-29 AFL2136 SVO → IST May 29, 10:20 UTCMay 29, 10:50 UTC30m
2026-05-29 AFL2136 SVO → IST May 29, 06:05 UTCMay 29, 06:35 UTC30m
2026-05-28 AFL2137 IST → SVO May 28, 13:15 UTCMay 28, 13:45 UTC30m
2026-05-28 AFL2136 SVO → IST May 28, 06:15 UTCMay 28, 10:30 UTC4h 15m
2026-05-27 AFL2135 IST → SVO May 27, 20:50 UTCMay 27, 21:20 UTC30m
2026-05-27 AFL2134 SVO → IST May 27, 18:00 UTCMay 27, 18:20 UTC20m
2026-05-27 AFL1268 SVO → KZN May 27, 05:29 UTCMay 27, 06:04 UTC35m
2026-05-26 AFL2136 SVO → IST May 26, 10:05 UTCMay 26, 10:14 UTC10m
2026-05-26 AFL2136 SVO → IST May 26, 06:04 UTCMay 26, 06:54 UTC50m
2026-05-26 AFL1131 AER → SVO May 26, 00:14 UTCMay 26, 00:24 UTC10m
2026-05-25 AFL1130 SVO → AER May 25, 16:50 UTCMay 25, 17:15 UTC25m
2026-05-24 AFL2134 SVO → IST May 24, 18:05 UTCMay 24, 18:15 UTC10m
2026-05-24 AFL2134 SVO → IST May 24, 14:05 UTCMay 24, 14:30 UTC25m
2026-05-23 AFL1942 SVO → ALA May 23, 21:15 UTCMay 24, 06:35 UTC9h 20m
2026-05-23 AFL1137 AER → SVO May 23, 06:00 UTCMay 23, 15:45 UTC9h 45m
2026-05-22 AFL1405 SVX → SVO May 22, 16:55 UTCMay 23, 15:45 UTC22h 50m
2026-05-22 AFL1404 SVO → SVX May 22, 13:10 UTCMay 23, 06:10 UTC16h 59m
2026-05-22 AFL1943 ALA → SVO May 22, 06:10 UTCMay 22, 06:45 UTC35m
2026-05-21 AFL1307 OVB → SVO May 21, 03:30 UTCMay 21, 06:05 UTC2h 35m
2026-05-20 AFL1306 SVO → OVB May 20, 22:10 UTCMay 20, 23:40 UTC1h 30m
2026-05-18 AFL1123 AER → SVO May 18, 16:15 UTCMay 18, 16:50 UTC35m
2026-05-18 AFL1122 SVO → AER May 18, 11:45 UTCMay 18, 12:05 UTC20m
2026-05-17 AFL1524 SVO → RGK May 17, 23:15 UTCMay 17, 23:30 UTC15m
2026-05-17 AFL1524 SVO → RGK May 17, 22:05 UTCMay 17, 22:25 UTC20m
2026-05-17 AFL1137 AER → SVO May 17, 15:05 UTCMay 17, 15:25 UTC20m
2026-05-17 AFL1136 SVO → AER May 17, 10:15 UTCMay 17, 10:35 UTC20m
2026-05-17 AFL1941 ALA → SVO May 17, 06:45 UTCMay 17, 07:05 UTC20m
2026-05-16 AFL2137 IST → SVO May 16, 15:20 UTCMay 16, 22:00 UTC6h 40m
2026-05-15 AFL1138 SVO → AER May 15, 07:15 UTCMay 15, 07:50 UTC35m
2026-05-13 AFL1943 ALA → SVO May 13, 15:00 UTCMay 14, 07:25 UTC16h 25m
2026-05-12 AFL2130 SVO → IST May 12, 08:10 UTCMay 12, 08:35 UTC25m
2026-05-11 AFL1867 EVN → SVO May 11, 15:25 UTCMay 11, 16:25 UTC1h 0m
2026-05-11 AFL1866 SVO → EVN May 11, 10:30 UTCMay 11, 11:40 UTC1h 10m
2026-05-11 AFL1943 ALA → SVO May 11, 07:15 UTCMay 11, 07:45 UTC30m
2026-05-10 AFL2127 AYT → SVO May 10, 15:05 UTCMay 11, 06:40 UTC15h 35m
2026-05-10 AFL2127 AYT → SVO May 10, 14:14 UTCMay 10, 14:34 UTC20m
2026-05-10 AFL2126 SVO → AYT May 10, 12:00 UTCMay 10, 12:15 UTC15m
2026-05-10 AFL2126 SVO → AYT May 10, 10:30 UTCMay 10, 11:10 UTC40m
2026-05-10 AFL2126 SVO → AYT May 10, 07:55 UTCMay 10, 08:40 UTC45m
2026-05-09 AFL1311 MRV → SVO May 9, 17:15 UTCMay 9, 17:25 UTC10m
2026-05-09 AFL1310 SVO → MRV May 9, 12:35 UTCMay 9, 13:45 UTC1h 10m
2026-05-06 AFL1940 SVO → ALA May 6, 21:10 UTCMay 6, 21:20 UTC10m
2026-05-06 AFL1940 SVO → ALA May 6, 20:10 UTCMay 6, 20:40 UTC30m
2026-05-06 AFL1137 AER → SVO May 6, 18:10 UTCMay 6, 18:25 UTC15m
2026-05-06 AFL1136 SVO → AER May 6, 10:35 UTCMay 6, 15:45 UTC5h 10m
2026-05-05 AFL1942 SVO → ALA May 5, 21:35 UTCMay 5, 22:15 UTC40m
2026-05-04 AFL2131 IST → SVO May 4, 16:25 UTCMay 4, 17:10 UTC45m
2026-05-03 AFL2137 IST → SVO May 3, 14:45 UTCMay 3, 15:05 UTC20m
2026-05-03 AFL2136 SVO → IST May 3, 08:55 UTCMay 3, 09:55 UTC1h 0m

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-73706 page for operator, model, and routing details .

Mode-S 151FEA frequently asked

What is Mode-S code 151FEA?
151FEA is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73706.
Where is Mode-S 151FEA registered?
Mode-S code 151FEA is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FEA broadcasting right now?
No active broadcast right now. Last signal was 37m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FEA, octal 05217752, decimal 1,384,426.
What flights does 151FEA operate?
Mode-S 151FEA has broadcast 20 distinct callsigns, including AFL2136, AFL2137, AFL2134, AFL1137, AFL1943.