Apparatus

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sensors Mode-S transponder

151FB8

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73656 · BOEING 737-800

Hex
151FB8
Octal
05217670
Decimal
1,384,376
Country
RU
Tail
RA-73656
Type
B738
No current signal · last broadcast Jul 26, 13:00 UTC
Flights observed
86
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 13:00 UTC

Last known position

Most recent position reported by Mode-S 151FB8.

Country allocation

The ICAO 24-bit address 151FB8 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
AUL531 Aeroflot-Nord 7 2026-07-25
AUL251 - 5 2026-07-15
AUL507 - 4 2026-06-29
AUL504 - 4 2026-07-04
AUL582 Aeroflot-Nord 3 2026-07-23
AUL545 - 3 2026-07-11
AUL541 - 3 2026-06-13
AUL532 Aeroflot-Nord 3 2026-07-10
AUL513 Aeroflot-Nord 3 2026-07-24
AUL596 - 2 2026-07-02
AUL595 Aeroflot-Nord 2 2026-07-07
AUL592 Aeroflot-Nord 2 2026-05-09
AUL586 Aeroflot-Nord 2 2026-07-22
AUL546 Aeroflot-Nord 2 2026-05-28
AUL528 - 2 2026-07-19
AUL521 Aeroflot-Nord 2 2026-06-09
AUL509 Aeroflot-Nord 2 2026-05-25
AUL508 Aeroflot-Nord 2 2026-05-11
AUL503 Aeroflot-Nord 2 2026-05-29
AUL252 Aeroflot-Nord 2 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AUL547 LED → AER Jul 26, 12:50 UTCJul 26, 13:00 UTC10m
2026-07-25 AUL531 LED → KUF Jul 25, 06:35 UTCJul 25, 07:05 UTC30m
2026-07-24 AUL571 LED → OVB Jul 24, 20:00 UTCJul 24, 20:10 UTC10m
2026-07-24 AUL514 VOZ → LED Jul 24, 14:20 UTCJul 24, 15:15 UTC55m
2026-07-24 AUL513 LED → KGD Jul 24, 11:50 UTCJul 24, 12:35 UTC45m
2026-07-23 AUL582 KUF → LED Jul 23, 17:30 UTCJul 23, 17:45 UTC15m
2026-07-23 AUL582 KUF → LED Jul 23, 15:50 UTCJul 23, 16:00 UTC10m
2026-07-22 AUL586 KRR → LED Jul 22, 15:50 UTCJul 22, 16:05 UTC15m
2026-07-19 AUL528 - Jul 19, 06:00 UTCJul 19, 06:35 UTC35m
2026-07-15 AUL217 SVO → ARH Jul 15, 15:20 UTCJul 15, 15:35 UTC15m
2026-07-15 AUL252 KGD → SVO Jul 15, 11:15 UTCJul 15, 13:00 UTC1h 45m
2026-07-15 AUL251 - Jul 15, 08:25 UTCJul 15, 09:35 UTC1h 10m
2026-07-15 AUL251 SVO → SVO Jul 15, 07:35 UTCJul 15, 07:45 UTC10m
2026-07-14 AUL522 MMK → SVO Jul 14, 14:40 UTCJul 14, 15:00 UTC20m
2026-07-11 AUL545 - Jul 11, 06:35 UTCJul 11, 19:00 UTC12h 25m
2026-07-11 AUL574 - Jul 11, 02:40 UTCJul 11, 03:55 UTC1h 15m
2026-07-10 AUL532 KUF → LED Jul 10, 12:50 UTCJul 10, 13:00 UTC10m
2026-07-07 AUL595 LED → GDZ Jul 7, 14:40 UTCJul 7, 15:25 UTC45m
2026-07-07 AUL595 LED → GDZ Jul 7, 07:25 UTCJul 7, 07:40 UTC15m
2026-07-05 AUL531 - Jul 5, 10:50 UTCJul 5, 11:10 UTC20m
2026-07-04 AUL504 - Jul 4, 23:00 UTCJul 5, 07:00 UTC8h 0m
2026-07-04 AUL862 - Jul 4, 08:55 UTCJul 4, 09:35 UTC40m
2026-07-02 AUL533 LED → KGD Jul 2, 17:45 UTCJul 2, 19:10 UTC1h 25m
2026-07-02 AUL596 - Jul 2, 16:20 UTCJul 2, 16:35 UTC15m
2026-06-30 AUL596 - Jun 30, 15:05 UTCJun 30, 15:15 UTC10m
2026-06-29 AUL507 - Jun 29, 07:40 UTCJun 29, 07:50 UTC10m
2026-06-28 AUL504 - Jun 28, 01:44 UTCJun 28, 06:59 UTC5h 15m
2026-06-17 AUL101 - Jun 17, 13:45 UTCJun 17, 14:40 UTC55m
2026-06-15 AUL252 KGD → SVO Jun 15, 18:29 UTCJun 15, 19:39 UTC1h 10m
2026-06-15 AUL251 SVO → SVO Jun 15, 15:50 UTCJun 15, 16:49 UTC1h 0m
2026-06-15 AUL218 ARH → SVO Jun 15, 11:34 UTCJun 15, 12:00 UTC25m
2026-06-13 AUL541 - Jun 13, 12:35 UTCJun 13, 14:50 UTC2h 15m
2026-06-11 AUL109 - Jun 11, 21:35 UTCJun 11, 21:50 UTC15m
2026-06-11 AUL110 - Jun 11, 19:55 UTCJun 11, 20:05 UTC10m
2026-06-11 AUL545 LED → AER Jun 11, 11:00 UTCJun 11, 12:00 UTC1h 0m
2026-06-09 AUL521 SVO → MMK Jun 9, 09:35 UTCJun 9, 10:00 UTC25m
2026-06-08 AUL251 SVO → SVO Jun 8, 15:40 UTCJun 8, 16:55 UTC1h 15m
2026-06-08 AUL217 SVO → ARH Jun 8, 09:15 UTCJun 8, 09:35 UTC20m
2026-06-07 AUL152 LED → ARH Jun 7, 11:55 UTCJun 7, 13:05 UTC1h 10m
2026-06-06 AUL251 SVO → SVO Jun 6, 10:09 UTCJun 6, 10:50 UTC40m
2026-06-05 AUL521 SVO → MMK Jun 5, 07:35 UTCJun 5, 08:05 UTC30m
2026-06-04 AUL228 - Jun 4, 21:15 UTCJun 4, 21:30 UTC15m
2026-06-04 AUL537 LED → KZN Jun 4, 16:20 UTCJun 4, 16:50 UTC30m
2026-06-03 AUL531 LED → KUF Jun 3, 12:15 UTCJun 3, 12:40 UTC25m
2026-06-02 AUL527 LED → CEK Jun 2, 23:50 UTCJun 3, 00:05 UTC15m
2026-05-31 AUL231 SVO → SVO May 31, 22:50 UTCMay 31, 23:15 UTC25m
2026-05-31 AUL227 SVO → KZN May 31, 17:15 UTCMay 31, 17:45 UTC30m
2026-05-31 AUL152 LED → ARH May 31, 12:40 UTCMay 31, 12:50 UTC10m
2026-05-29 AUL504 - May 29, 20:50 UTCMay 29, 21:35 UTC45m
2026-05-29 AUL503 LED → SCW May 29, 17:50 UTCMay 29, 18:10 UTC20m

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-73656 page for operator, model, and routing details .

Mode-S 151FB8 frequently asked

What is Mode-S code 151FB8?
151FB8 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73656.
Where is Mode-S 151FB8 registered?
Mode-S code 151FB8 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FB8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FB8, octal 05217670, decimal 1,384,376.
What flights does 151FB8 operate?
Mode-S 151FB8 has broadcast 20 distinct callsigns, including AUL531, AUL251, AUL507, AUL504, AUL582.