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
Broadcasting now · callsign AFL320 · 37,000 ft
Flights observed
181
Distinct callsigns
20
Country
RU
Last broadcast
26m ago

Current position

151FE1 is currently broadcasting. Map zoomed to live position.

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
AFL209 - 20 2026-07-06
AFL204 - 19 2026-07-11
AFL205 - 16 2026-07-11
AFL232 - 14 2026-07-09
AFL221 - 13 2026-07-13
AFL320 - 12 2026-07-14
AFL233 - 11 2026-07-10
AFL208 - 11 2026-07-07
AFL321 - 5 2026-06-29
AFL220 - 5 2026-07-12
AFL1731 Aeroflot Russian Airlines 5 2026-06-05
AFL273 Aeroflot Russian Airlines 4 2026-05-31
AFL581 Aeroflot Russian Airlines 3 2026-04-16
AFL1745 - 3 2026-06-30
AFL1727 - 3 2026-06-17
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
AFL225 Aeroflot Russian Airlines 2 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFL320 - Jul 14, 00:00 UTCJul 14, 02:15 UTC2h 15m
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
2026-07-09 AFL232 - Jul 9, 03:35 UTCJul 10, 00:05 UTC20h 30m
2026-07-09 AFL320 - Jul 9, 00:20 UTCJul 10, 00:05 UTC23h 45m
2026-07-08 AFL320 SVO → SVO Jul 8, 20:00 UTCJul 8, 20:45 UTC45m
2026-07-07 AFL208 - Jul 7, 20:35 UTCJul 8, 10:15 UTC13h 40m
2026-07-07 AFL205 - Jul 7, 04:10 UTCJul 7, 21:15 UTC17h 5m
2026-07-07 AFL204 - Jul 7, 01:05 UTCJul 7, 01:20 UTC15m
2026-07-06 AFL209 - Jul 6, 08:40 UTCJul 6, 22:30 UTC13h 50m
2026-07-05 AFL209 - Jul 5, 20:35 UTCJul 6, 12:00 UTC15h 25m
2026-07-05 AFL209 - Jul 5, 08:55 UTCJul 5, 21:15 UTC12h 20m
2026-07-04 AFL208 - Jul 4, 20:30 UTCJul 5, 09:35 UTC13h 5m
2026-07-04 AFL221 - Jul 4, 08:55 UTCJul 4, 21:15 UTC12h 20m
2026-07-03 AFL221 - Jul 3, 20:00 UTCJul 4, 09:40 UTC13h 40m
2026-07-03 AFL221 - Jul 3, 12:20 UTCJul 4, 09:40 UTC21h 20m
2026-07-03 AFL1017 - Jul 3, 10:45 UTCJul 4, 09:40 UTC22h 55m
2026-07-03 AFL1016 - Jul 3, 06:40 UTCJul 3, 08:35 UTC1h 55m
2026-07-02 AFL1011 - Jul 2, 18:45 UTCJul 2, 19:40 UTC55m
2026-07-02 AFL1010 - Jul 2, 16:10 UTCJul 2, 16:50 UTC40m
2026-07-02 AFL1010 SVO → SVO Jul 2, 14:50 UTCJul 2, 15:00 UTC10m
2026-07-02 AFL205 - Jul 2, 07:25 UTCJul 2, 08:05 UTC40m
2026-07-02 AFL204 - Jul 2, 01:00 UTCJul 2, 01:15 UTC15m
2026-07-01 AFL204 - Jul 1, 21:50 UTCJul 1, 22:30 UTC40m
2026-07-01 AFL204 SVO → SVO Jul 1, 18:45 UTCJul 1, 19:00 UTC15m
2026-06-30 AFL1745 - Jun 30, 15:35 UTCJul 1, 07:25 UTC15h 50m
2026-06-30 AFL205 - Jun 30, 07:00 UTCJul 1, 06:15 UTC23h 15m
2026-06-30 AFL205 - Jun 30, 04:00 UTCJun 30, 15:40 UTC11h 40m
2026-06-30 AFL204 - Jun 30, 01:14 UTCJun 30, 01:30 UTC16m
2026-06-29 AFL321 - Jun 29, 06:59 UTCJun 29, 22:44 UTC15h 45m
2026-06-29 AFL321 - Jun 29, 02:39 UTCJun 29, 22:44 UTC20h 5m
2026-06-29 AFL320 - Jun 29, 00:20 UTCJun 29, 22:44 UTC22h 25m
2026-06-29 AFL320 - Jun 29, 00:14 UTCJun 29, 22:15 UTC22h 0m
2026-06-28 AFL320 - Jun 28, 20:45 UTCJun 29, 13:59 UTC17h 15m
2026-06-28 AFL320 - Jun 28, 09:30 UTCJun 29, 07:59 UTC22h 30m
2026-06-27 AFL220 - Jun 27, 19:59 UTCJun 28, 10:15 UTC14h 15m
2026-06-27 AFL209 - Jun 27, 06:09 UTCJun 27, 20:39 UTC14h 30m
2026-06-26 AFL209 - Jun 26, 20:20 UTCJun 27, 20:14 UTC23h 55m
2026-06-26 AFL209 - Jun 26, 09:20 UTCJun 27, 06:15 UTC20h 55m
2026-06-25 AFL208 - Jun 25, 20:59 UTCJun 26, 09:59 UTC13h 0m
2026-06-24 AFL284 - Jun 24, 17:25 UTCJun 25, 07:54 UTC14h 30m
2026-06-24 AFL284 - Jun 24, 08:49 UTCJun 25, 07:54 UTC23h 5m
2026-06-23 AFL221 - Jun 23, 20:19 UTCJun 24, 17:34 UTC21h 15m

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?
Yes. Mode-S 151FE1 is currently airborne.
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 AFL209, AFL204, AFL205, AFL232, AFL221.