Apparatus

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sensors Mode-S transponder

151FE1

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73697 · BOEING 777-300ER

Hex
151FE1
Octal
05217741
Decimal
1,384,417
Country
RU
Tail
RA-73697
Type
B77W
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
221
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S 151FE1.

Country allocation

The ICAO 24-bit address 151FE1 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
AFL320 Aeroflot Russian Airlines 23 2026-07-22
AFL204 Aeroflot Russian Airlines 23 2026-07-26
AFL209 - 22 2026-07-14
AFL205 Aeroflot Russian Airlines 17 2026-07-26
AFL321 - 14 2026-07-23
AFL232 - 14 2026-07-09
AFL221 Aeroflot Russian Airlines 14 2026-07-25
AFL233 - 11 2026-07-10
AFL208 - 11 2026-07-07
AFL220 Aeroflot Russian Airlines 10 2026-07-26
AFL1731 Aeroflot Russian Airlines 5 2026-06-05
AFL273 Aeroflot Russian Airlines 4 2026-05-31
AFL1727 - 4 2026-07-17
AFL581 Aeroflot Russian Airlines 3 2026-04-16
AFL1745 - 3 2026-06-30
AFL1739 - 3 2026-07-18
AFL584 Aeroflot Russian Airlines 2 2026-05-06
AFL580 - 2 2026-04-16
AFL284 - 2 2026-06-24
AFL272 Aeroflot Russian Airlines 2 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFL220 SVO → CAN Jul 26, 17:50 UTCJul 26, 20:20 UTC2h 30m
2026-07-26 AFL220 SVO → CAN Jul 26, 16:30 UTCJul 26, 16:45 UTC15m
2026-07-26 AFL205 PKX → SVO Jul 26, 04:40 UTCJul 26, 08:10 UTC3h 31m
2026-07-26 AFL204 SVO → PKX Jul 26, 00:50 UTCJul 26, 01:05 UTC15m
2026-07-25 AFL204 SVO → PKX Jul 25, 21:35 UTCJul 25, 22:20 UTC45m
2026-07-25 AFL204 SVO → PKX Jul 25, 18:30 UTCJul 25, 18:40 UTC10m
2026-07-25 AFL221 CAN → SVO Jul 25, 12:15 UTCJul 25, 12:40 UTC25m
2026-07-24 AFL220 SVO → CAN Jul 24, 17:25 UTCJul 25, 09:10 UTC15h 45m
2026-07-24 AFL220 SVO → CAN Jul 24, 10:40 UTCJul 25, 09:10 UTC22h 30m
2026-07-24 AFL220 SVO → CAN Jul 24, 05:00 UTCJul 24, 23:10 UTC18h 10m
2026-07-24 AFL204 SVO → PKX Jul 24, 02:05 UTCJul 24, 02:20 UTC15m
2026-07-23 AFL321 - Jul 23, 07:05 UTCJul 23, 23:35 UTC16h 30m
2026-07-23 AFL321 - Jul 23, 02:20 UTCJul 23, 23:35 UTC21h 15m
2026-07-23 AFL321 - Jul 23, 00:30 UTCJul 23, 23:35 UTC23h 5m
2026-07-22 AFL321 - Jul 22, 14:30 UTCJul 23, 14:05 UTC23h 35m
2026-07-22 AFL321 - Jul 22, 11:10 UTCJul 23, 09:25 UTC22h 15m
2026-07-22 AFL320 SVO → MLE Jul 22, 02:20 UTCJul 23, 02:15 UTC23h 55m
2026-07-22 AFL320 SVO → MLE Jul 22, 00:35 UTCJul 22, 14:45 UTC14h 10m
2026-07-21 AFL320 SVO → MLE Jul 21, 14:20 UTCJul 22, 11:10 UTC20h 50m
2026-07-21 AFL320 SVO → MLE Jul 21, 14:05 UTCJul 22, 11:10 UTC21h 5m
2026-07-21 AFL320 SVO → MLE Jul 21, 08:25 UTCJul 22, 04:00 UTC19h 35m
2026-07-21 AFL321 - Jul 21, 07:30 UTCJul 22, 04:00 UTC20h 30m
2026-07-21 AFL321 - Jul 21, 02:20 UTCJul 22, 02:05 UTC23h 45m
2026-07-21 AFL321 - Jul 21, 00:30 UTCJul 21, 14:30 UTC14h 0m
2026-07-20 AFL320 SVO → MLE Jul 20, 10:20 UTCJul 21, 09:45 UTC23h 25m
2026-07-20 AFL320 SVO → MLE Jul 20, 08:35 UTCJul 21, 07:50 UTC23h 15m
2026-07-20 AFL320 SVO → MLE Jul 20, 07:05 UTCJul 21, 04:00 UTC20h 55m
2026-07-20 AFL320 SVO → MLE Jul 20, 02:45 UTCJul 21, 02:15 UTC23h 29m
2026-07-20 AFL320 SVO → MLE Jul 20, 00:35 UTCJul 20, 02:25 UTC1h 50m
2026-07-19 AFL1003 - Jul 19, 12:00 UTCJul 19, 12:45 UTC45m
2026-07-19 AFL1002 - Jul 19, 08:35 UTCJul 19, 09:05 UTC30m
2026-07-18 AFL1739 - Jul 18, 14:05 UTCJul 18, 14:35 UTC30m
2026-07-17 AFL1739 - Jul 17, 20:44 UTCJul 18, 13:25 UTC16h 41m
2026-07-17 AFL1727 - Jul 17, 12:10 UTCJul 17, 20:50 UTC8h 40m
2026-07-16 AFL1739 - Jul 16, 12:44 UTCJul 17, 12:15 UTC23h 30m
2026-07-15 AFL1738 SVO → SVO Jul 15, 19:35 UTCJul 15, 19:55 UTC20m
2026-07-14 AFL209 - Jul 14, 20:40 UTCJul 15, 12:25 UTC15h 44m
2026-07-14 AFL209 - Jul 14, 13:20 UTCJul 15, 12:15 UTC22h 54m
2026-07-14 AFL321 - Jul 14, 02:20 UTCJul 14, 21:20 UTC19h 0m
2026-07-14 AFL320 - Jul 14, 00:55 UTCJul 14, 21:20 UTC20h 25m
2026-07-14 AFL320 - Jul 14, 00:00 UTCJul 14, 21:20 UTC21h 20m
2026-07-13 AFL320 - Jul 13, 19:55 UTCJul 13, 20:05 UTC10m
2026-07-13 AFL221 - Jul 13, 09:10 UTCJul 13, 12:25 UTC3h 15m
2026-07-12 AFL220 - Jul 12, 19:50 UTCJul 12, 20:30 UTC40m
2026-07-11 AFL220 - Jul 11, 20:05 UTCJul 12, 09:10 UTC13h 5m
2026-07-11 AFL220 SVO → SVO Jul 11, 16:55 UTCJul 11, 17:10 UTC15m
2026-07-11 AFL205 - Jul 11, 04:01 UTCJul 11, 07:45 UTC3h 45m
2026-07-11 AFL204 - Jul 11, 00:40 UTCJul 11, 00:55 UTC15m
2026-07-10 AFL233 - Jul 10, 02:40 UTCJul 10, 22:00 UTC19h 20m
2026-07-09 AFL232 - Jul 9, 06:40 UTCJul 10, 00:05 UTC17h 25m

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-73697 page for operator, model, and routing details .

Mode-S 151FE1 frequently asked

What is Mode-S code 151FE1?
151FE1 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73697.
Where is Mode-S 151FE1 registered?
Mode-S code 151FE1 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FE1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FE1, octal 05217741, decimal 1,384,417.
What flights does 151FE1 operate?
Mode-S 151FE1 has broadcast 20 distinct callsigns, including AFL320, AFL204, AFL209, AFL205, AFL321.