Apparatus

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sensors Mode-S transponder

151FED

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73709 · AIRBUS A-321

Hex
151FED
Octal
05217755
Decimal
1,384,429
Country
RU
Tail
RA-73709
Type
A321
No current signal · last broadcast 8h ago
Flights observed
182
Distinct callsigns
20
Country
RU
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 151FED.

Country allocation

The ICAO 24-bit address 151FED 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
AFL2146 - 11 2026-07-12
AFL2145 - 10 2026-07-10
AFL2144 - 8 2026-07-10
AFL2143 - 8 2026-07-13
AFL2147 Aeroflot Russian Airlines 7 2026-07-12
AFL2142 - 7 2026-06-13
AFL2171 - 6 2026-07-04
AFL2170 - 6 2026-07-04
AFL1011 - 5 2026-06-26
AFL1886 Aeroflot Russian Airlines 4 2026-05-06
AFL1010 Aeroflot Russian Airlines 4 2026-05-23
AFL1007 Aeroflot Russian Airlines 4 2026-05-27
AFL1883 - 3 2026-07-09
AFL1450 - 3 2026-06-18
AFL1325 Aeroflot Russian Airlines 3 2026-05-19
AFL1024 Aeroflot Russian Airlines 3 2026-06-02
AFL1017 Aeroflot Russian Airlines 3 2026-06-01
AFL615 Aeroflot Russian Airlines 2 2026-05-28
AFL2700 Aeroflot Russian Airlines 2 2026-05-10
AFL2160 Aeroflot Russian Airlines 2 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFL1028 - Jul 14, 09:50 UTCJul 14, 10:05 UTC15m
2026-07-13 AFL2143 - Jul 13, 11:25 UTCJul 13, 13:10 UTC1h 45m
2026-07-12 AFL2147 AYT → SVO Jul 12, 18:10 UTCJul 13, 09:30 UTC15h 20m
2026-07-12 AFL2146 - Jul 12, 15:20 UTCJul 12, 15:55 UTC35m
2026-07-11 AFL1942 SVO → ALA Jul 11, 21:30 UTCJul 11, 22:01 UTC30m
2026-07-10 AFL2145 - Jul 10, 19:20 UTCJul 10, 21:00 UTC1h 40m
2026-07-10 AFL2144 - Jul 10, 16:10 UTCJul 10, 17:50 UTC1h 40m
2026-07-09 AFL2147 AYT → SVO Jul 9, 15:20 UTCJul 9, 17:05 UTC1h 45m
2026-07-09 AFL2146 - Jul 9, 11:55 UTCJul 9, 13:40 UTC1h 45m
2026-07-09 AFL2146 SVO → SVO Jul 9, 08:50 UTCJul 9, 09:20 UTC30m
2026-07-09 AFL1883 - Jul 9, 03:25 UTCJul 9, 03:45 UTC20m
2026-07-08 AFL1883 - Jul 8, 08:10 UTCJul 9, 03:45 UTC19h 35m
2026-07-05 AFL2145 AYT → SVO Jul 5, 17:35 UTCJul 5, 19:25 UTC1h 50m
2026-07-05 AFL2144 SVO → AYT Jul 5, 04:55 UTCJul 5, 15:55 UTC11h 0m
2026-07-04 AFL1833 - Jul 4, 19:35 UTCJul 4, 19:50 UTC15m
2026-07-04 AFL2171 - Jul 4, 12:10 UTCJul 4, 13:00 UTC50m
2026-07-04 AFL2171 - Jul 4, 11:05 UTCJul 4, 11:35 UTC30m
2026-07-04 AFL2170 - Jul 4, 08:15 UTCJul 4, 08:45 UTC30m
2026-07-03 AFL2147 AYT → SVO Jul 3, 15:20 UTCJul 3, 17:10 UTC1h 50m
2026-07-03 AFL2146 - Jul 3, 04:45 UTCJul 3, 13:45 UTC9h 0m
2026-07-02 AFL2147 AYT → SVO Jul 2, 15:30 UTCJul 3, 13:45 UTC22h 15m
2026-07-02 AFL2146 - Jul 2, 12:55 UTCJul 2, 13:25 UTC30m
2026-07-02 AFL2146 SVO → SVO Jul 2, 08:55 UTCJul 2, 09:25 UTC30m
2026-07-02 AFL1511 - Jul 2, 02:25 UTCJul 2, 02:50 UTC25m
2026-07-01 AFL1510 - Jul 1, 06:50 UTCJul 1, 20:20 UTC13h 30m
2026-06-30 AFL1511 - Jun 30, 15:55 UTCJul 1, 02:20 UTC10h 25m
2026-06-30 AFL1946 SVO → SVO Jun 30, 07:20 UTCJun 30, 07:40 UTC20m
2026-06-29 AFL1946 SVO → SVO Jun 29, 06:59 UTCJun 29, 07:09 UTC10m
2026-06-28 AFL2147 AYT → SVO Jun 28, 15:09 UTCJun 28, 17:00 UTC1h 50m
2026-06-28 AFL2146 - Jun 28, 12:55 UTCJun 28, 13:25 UTC30m
2026-06-26 AFL1011 - Jun 26, 18:39 UTCJun 27, 07:34 UTC12h 55m
2026-06-26 AFL1015 - Jun 26, 09:45 UTCJun 26, 16:54 UTC7h 10m
2026-06-26 AFL1014 - Jun 26, 07:05 UTCJun 26, 07:50 UTC45m
2026-06-25 AFL1416 - Jun 25, 07:45 UTCJun 26, 07:14 UTC23h 30m
2026-06-24 AFL2147 AYT → SVO Jun 24, 15:14 UTCJun 25, 05:05 UTC13h 50m
2026-06-24 AFL2146 - Jun 24, 00:05 UTCJun 24, 13:50 UTC13h 45m
2026-06-23 AFL2146 - Jun 23, 16:24 UTCJun 24, 13:14 UTC20h 50m
2026-06-22 AFL2145 AYT → SVO Jun 22, 17:15 UTCJun 23, 08:09 UTC14h 55m
2026-06-22 AFL2144 SVO → AYT Jun 22, 15:10 UTCJun 22, 15:35 UTC25m
2026-06-21 AFL2145 AYT → SVO Jun 21, 17:24 UTCJun 21, 19:05 UTC1h 40m
2026-06-21 AFL2144 SVO → AYT Jun 21, 13:29 UTCJun 21, 15:34 UTC2h 5m
2026-06-20 AFL1383 - Jun 20, 03:14 UTCJun 20, 03:44 UTC30m
2026-06-19 AFL1451 - Jun 19, 01:19 UTCJun 19, 01:45 UTC25m
2026-06-18 AFL1450 - Jun 18, 23:15 UTCJun 18, 23:55 UTC40m
2026-06-18 AFL1450 - Jun 18, 01:20 UTCJun 18, 23:55 UTC22h 35m
2026-06-17 AFL1480 - Jun 17, 18:40 UTCJun 18, 01:40 UTC7h 0m
2026-06-17 AFL1451 - Jun 17, 01:45 UTCJun 17, 02:10 UTC25m
2026-06-16 AFL1450 - Jun 16, 23:30 UTCJun 17, 00:10 UTC40m
2026-06-15 AFL2145 AYT → SVO Jun 15, 18:10 UTCJun 15, 20:04 UTC1h 55m
2026-06-15 AFL2171 IST → SVO Jun 15, 05:04 UTCJun 15, 15:59 UTC10h 55m

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-73709 page for operator, model, and routing details .

Mode-S 151FED frequently asked

What is Mode-S code 151FED?
151FED is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73709.
Where is Mode-S 151FED registered?
Mode-S code 151FED is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FED broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FED, octal 05217755, decimal 1,384,429.
What flights does 151FED operate?
Mode-S 151FED has broadcast 20 distinct callsigns, including AFL2146, AFL2145, AFL2144, AFL2143, AFL2147.