Apparatus

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sensors Mode-S transponder

151FB4

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73652 · BOEING 737-700

Hex
151FB4
Octal
05217664
Decimal
1,384,372
Country
RU
Tail
RA-73652
Type
B737
No current signal · last broadcast Jul 26, 07:00 UTC
Flights observed
160
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 07:00 UTC

Last known position

Most recent position reported by Mode-S 151FB4.

Country allocation

The ICAO 24-bit address 151FB4 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
AUL513 Aeroflot-Nord 13 2026-07-25
AUL504 - 12 2026-06-08
AUL514 Aeroflot-Nord 11 2026-07-07
AUL146 - 10 2026-07-08
AUL507 - 8 2026-07-06
AUL217 Aeroflot-Nord 7 2026-07-21
AUL145 - 7 2026-07-13
AUL510 Aeroflot-Nord 6 2026-07-25
AUL149 Aeroflot-Nord 6 2026-07-21
AUL588 - 5 2026-07-05
AUL517 Aeroflot-Nord 5 2026-07-17
AUL509 Aeroflot-Nord 5 2026-07-26
AUL505 - 5 2026-07-15
AUL503 - 5 2026-07-10
AUL3308 Aeroflot-Nord 5 2026-07-16
AUL176 - 5 2026-07-15
AUL530 Aeroflot-Nord 4 2026-07-14
AUL518 Aeroflot-Nord 4 2026-06-12
AUL506 - 4 2026-07-15
AUL150 Aeroflot-Nord 4 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AUL509 LED → GOJ Jul 26, 06:45 UTCJul 26, 07:00 UTC15m
2026-07-25 AUL513 LED → KGD Jul 25, 11:15 UTCJul 25, 12:25 UTC1h 10m
2026-07-25 AUL510 GOJ → LED Jul 25, 10:05 UTCJul 25, 10:15 UTC10m
2026-07-23 AUL534 - Jul 23, 20:10 UTCJul 23, 21:25 UTC1h 15m
2026-07-23 AUL533 LED → KGD Jul 23, 18:05 UTCJul 23, 18:25 UTC20m
2026-07-23 AUL510 GOJ → LED Jul 23, 11:45 UTCJul 23, 12:00 UTC15m
2026-07-22 AUL1504 SCW → LED Jul 22, 21:35 UTCJul 22, 22:15 UTC40m
2026-07-21 AUL149 ARH → LED Jul 21, 18:00 UTCJul 21, 19:25 UTC1h 25m
2026-07-21 AUL217 SVO → ARH Jul 21, 16:40 UTCJul 21, 17:00 UTC20m
2026-07-21 AUL218 ARH → SVO Jul 21, 12:55 UTCJul 21, 13:35 UTC40m
2026-07-20 AUL149 ARH → LED Jul 20, 18:05 UTCJul 21, 11:55 UTC17h 50m
2026-07-20 AUL149 ARH → LED Jul 20, 15:40 UTCJul 21, 11:55 UTC20h 15m
2026-07-19 AUL308 NNM → ARH Jul 19, 19:25 UTCJul 20, 12:00 UTC16h 35m
2026-07-19 AUL1510 GOJ → LED Jul 19, 16:00 UTCJul 19, 16:10 UTC10m
2026-07-19 AUL1504 SCW → LED Jul 19, 08:55 UTCJul 19, 09:40 UTC45m
2026-07-17 AUL149 ARH → LED Jul 17, 19:05 UTCJul 18, 07:55 UTC12h 51m
2026-07-17 AUL150 LED → SCW Jul 17, 17:40 UTCJul 17, 18:10 UTC30m
2026-07-17 AUL517 LED → MMK Jul 17, 01:55 UTCJul 17, 15:00 UTC13h 5m
2026-07-16 AUL3308 NNM → ARH Jul 16, 11:10 UTCJul 17, 02:15 UTC15h 5m
2026-07-15 AUL513 LED → KGD Jul 15, 17:50 UTCJul 15, 18:40 UTC50m
2026-07-15 AUL506 - Jul 15, 15:30 UTCJul 15, 16:15 UTC45m
2026-07-15 AUL176 - Jul 15, 08:25 UTCJul 15, 13:40 UTC5h 15m
2026-07-15 AUL505 - Jul 15, 06:05 UTCJul 15, 06:45 UTC40m
2026-07-14 AUL530 KGD → MMK Jul 14, 14:45 UTCJul 14, 20:00 UTC5h 15m
2026-07-14 AUL510 GOJ → LED Jul 14, 09:40 UTCJul 14, 09:50 UTC10m
2026-07-13 AUL150 LED → SCW Jul 13, 15:35 UTCJul 13, 16:40 UTC1h 5m
2026-07-13 AUL145 - Jul 13, 14:00 UTCJul 13, 14:25 UTC25m
2026-07-12 AUL537 LED → KZN Jul 12, 16:30 UTCJul 12, 16:40 UTC10m
2026-07-12 AUL517 LED → MMK Jul 12, 11:20 UTCJul 12, 12:05 UTC45m
2026-07-10 AUL503 - Jul 10, 12:30 UTCJul 10, 12:40 UTC10m
2026-07-08 AUL171 - Jul 8, 18:10 UTCJul 8, 19:10 UTC1h 0m
2026-07-08 AUL172 - Jul 8, 15:00 UTCJul 8, 15:40 UTC40m
2026-07-08 AUL146 - Jul 8, 06:35 UTCJul 8, 07:10 UTC35m
2026-07-07 AUL514 VOZ → LED Jul 7, 22:35 UTCJul 7, 22:45 UTC10m
2026-07-07 AUL513 LED → KGD Jul 7, 11:45 UTCJul 7, 12:25 UTC40m
2026-07-06 AUL514 VOZ → LED Jul 6, 16:40 UTCJul 6, 18:00 UTC1h 20m
2026-07-06 AUL507 - Jul 6, 08:15 UTCJul 6, 15:10 UTC6h 55m
2026-07-05 AUL510 GOJ → LED Jul 5, 10:55 UTCJul 5, 11:10 UTC15m
2026-07-05 AUL509 - Jul 5, 07:35 UTCJul 5, 07:50 UTC15m
2026-07-05 AUL588 - Jul 5, 04:35 UTCJul 5, 04:45 UTC10m
2026-07-04 AUL587 LED → REN Jul 4, 23:45 UTCJul 5, 00:05 UTC20m
2026-06-28 AUL149 ARH → LED Jun 28, 19:04 UTCJun 28, 19:29 UTC25m
2026-06-28 AUL150 LED → SCW Jun 28, 18:00 UTCJun 28, 18:10 UTC10m
2026-06-28 AUL588 - Jun 28, 03:19 UTCJun 28, 03:29 UTC10m
2026-06-27 AUL514 VOZ → LED Jun 27, 14:05 UTCJun 27, 14:45 UTC40m
2026-06-26 AUL145 - Jun 26, 14:29 UTCJun 26, 14:59 UTC30m
2026-06-26 AUL507 - Jun 26, 07:39 UTCJun 26, 07:50 UTC10m
2026-06-25 AUL507 - Jun 25, 01:19 UTCJun 25, 18:19 UTC17h 0m
2026-06-24 AUL171 - Jun 24, 17:50 UTCJun 25, 13:55 UTC20h 5m
2026-06-24 AUL145 - Jun 24, 08:14 UTCJun 24, 15:54 UTC7h 40m

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-73652 page for operator, model, and routing details .

Mode-S 151FB4 frequently asked

What is Mode-S code 151FB4?
151FB4 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73652.
Where is Mode-S 151FB4 registered?
Mode-S code 151FB4 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FB4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 07:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FB4, octal 05217664, decimal 1,384,372.
What flights does 151FB4 operate?
Mode-S 151FB4 has broadcast 20 distinct callsigns, including AUL513, AUL504, AUL514, AUL146, AUL507.