Apparatus

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sensors Mode-S transponder

151FBA

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73658 · BOEING 737-800

Hex
151FBA
Octal
05217672
Decimal
1,384,378
Country
RU
Tail
RA-73658
Type
B738
No current signal · last broadcast Jul 25, 06:45 UTC
Flights observed
135
Distinct callsigns
20
Country
RU
Last broadcast
Jul 25, 06:45 UTC

Last known position

Most recent position reported by Mode-S 151FBA.

Country allocation

The ICAO 24-bit address 151FBA 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
AUL505 - 9 2026-07-17
AUL506 - 8 2026-07-18
AUL581 Aeroflot-Nord 7 2026-07-10
AUL531 - 6 2026-07-04
AUL533 Aeroflot-Nord 5 2026-07-18
AUL582 Aeroflot-Nord 4 2026-06-01
AUL574 - 4 2026-06-07
AUL532 Aeroflot-Nord 4 2026-07-04
AUL502 Aeroflot-Nord 4 2026-05-29
AUL3103 Aeroflot-Nord 4 2026-06-02
AUL251 Aeroflot-Nord 4 2026-06-22
AUL546 Aeroflot-Nord 3 2026-07-23
AUL545 Aeroflot-Nord 3 2026-07-25
AUL527 - 3 2026-07-04
AUL517 Aeroflot-Nord 3 2026-07-11
AUL508 Aeroflot-Nord 3 2026-07-14
AUL504 - 3 2026-05-14
AUL176 Aeroflot-Nord 3 2026-05-09
AUL152 Aeroflot-Nord 3 2026-05-28
AUL148 Aeroflot-Nord 3 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 AUL545 LED → AER Jul 25, 06:20 UTCJul 25, 06:45 UTC25m
2026-07-23 AUL546 AER → LED Jul 23, 15:55 UTCJul 23, 16:10 UTC15m
2026-07-23 AUL545 - Jul 23, 06:05 UTCJul 23, 06:30 UTC25m
2026-07-22 AUL3104 CEK → CEK Jul 22, 04:20 UTCJul 22, 05:25 UTC1h 5m
2026-07-22 AUL3104 CEK → CEK Jul 22, 00:40 UTCJul 22, 01:05 UTC25m
2026-07-19 AUL507 - Jul 19, 07:45 UTCJul 19, 07:55 UTC10m
2026-07-19 AUL534 - Jul 19, 05:25 UTCJul 19, 06:15 UTC50m
2026-07-18 AUL533 LED → KGD Jul 18, 16:10 UTCJul 18, 17:30 UTC1h 20m
2026-07-18 AUL506 - Jul 18, 12:00 UTCJul 18, 12:35 UTC35m
2026-07-17 AUL505 - Jul 17, 21:44 UTCJul 18, 09:40 UTC11h 56m
2026-07-17 AUL571 LED → OVB Jul 17, 20:04 UTCJul 17, 20:20 UTC15m
2026-07-14 AUL508 MMK → LED Jul 14, 09:20 UTCJul 14, 10:10 UTC50m
2026-07-11 AUL517 LED → MMK Jul 11, 12:30 UTCJul 11, 13:15 UTC45m
2026-07-11 AUL506 - Jul 11, 10:10 UTCJul 11, 11:10 UTC1h 0m
2026-07-11 AUL505 - Jul 11, 06:45 UTCJul 11, 08:05 UTC1h 20m
2026-07-10 AUL571 LED → OVB Jul 10, 20:05 UTCJul 10, 20:15 UTC10m
2026-07-10 AUL581 LED → KUF Jul 10, 13:50 UTCJul 10, 14:00 UTC10m
2026-07-10 AUL506 - Jul 10, 09:10 UTCJul 10, 10:00 UTC50m
2026-07-10 AUL505 - Jul 10, 06:20 UTCJul 10, 07:05 UTC45m
2026-07-09 AUL572 - Jul 9, 03:40 UTCJul 9, 04:15 UTC35m
2026-07-05 AUL4545 - Jul 5, 21:55 UTCJul 5, 22:20 UTC25m
2026-07-05 AUL581 LED → KUF Jul 5, 14:45 UTCJul 5, 15:05 UTC20m
2026-07-04 AUL527 - Jul 4, 22:05 UTCJul 4, 22:15 UTC10m
2026-07-04 AUL581 LED → KUF Jul 4, 16:05 UTCJul 4, 16:25 UTC20m
2026-07-04 AUL532 KUF → LED Jul 4, 14:45 UTCJul 4, 14:55 UTC10m
2026-07-04 AUL531 - Jul 4, 09:55 UTCJul 4, 10:15 UTC20m
2026-07-03 AUL587 LED → REN Jul 3, 22:55 UTCJul 3, 23:10 UTC15m
2026-07-02 AUL501 - Jul 2, 23:05 UTCJul 2, 23:20 UTC15m
2026-07-02 AUL1509 - Jul 2, 18:15 UTCJul 2, 18:30 UTC15m
2026-07-02 AUL597 LED → KZN Jul 2, 12:40 UTCJul 2, 13:10 UTC30m
2026-07-02 AUL508 MMK → LED Jul 2, 07:55 UTCJul 2, 11:30 UTC3h 35m
2026-07-01 AUL591 LED → UFA Jul 1, 23:00 UTCJul 1, 23:10 UTC10m
2026-07-01 AUL547 LED → AER Jul 1, 12:50 UTCJul 1, 13:40 UTC50m
2026-06-30 AUL546 AER → LED Jun 30, 16:50 UTCJun 30, 17:00 UTC10m
2026-06-27 AUL505 - Jun 27, 10:05 UTCJun 27, 10:40 UTC35m
2026-06-25 AUL109 - Jun 25, 16:45 UTCJun 25, 16:59 UTC15m
2026-06-22 AUL252 KGD → SVO Jun 22, 20:44 UTCJun 22, 21:35 UTC50m
2026-06-22 AUL251 SVO → SVO Jun 22, 18:09 UTCJun 22, 18:44 UTC35m
2026-06-20 AUL517 LED → MMK Jun 20, 12:09 UTCJun 20, 12:59 UTC50m
2026-06-20 AUL506 KGD → LED Jun 20, 09:59 UTCJun 20, 11:05 UTC1h 5m
2026-06-20 AUL251 SVO → SVO Jun 20, 07:04 UTCJun 20, 08:05 UTC1h 0m
2026-06-18 AUL231 - Jun 18, 23:50 UTCJun 19, 00:10 UTC19m
2026-06-13 AUL517 LED → MMK Jun 13, 12:15 UTCJun 13, 13:35 UTC1h 20m
2026-06-13 AUL506 KGD → LED Jun 13, 09:55 UTCJun 13, 11:00 UTC1h 5m
2026-06-13 AUL505 - Jun 13, 03:45 UTCJun 13, 08:10 UTC4h 24m
2026-06-10 AUL9102 - Jun 10, 14:00 UTCJun 10, 14:15 UTC15m
2026-06-09 AUL527 LED → CEK Jun 9, 22:25 UTCJun 9, 22:45 UTC20m
2026-06-09 AUL537 LED → KZN Jun 9, 16:55 UTCJun 9, 17:30 UTC35m
2026-06-09 AUL508 MMK → LED Jun 9, 01:00 UTCJun 9, 11:10 UTC10h 10m
2026-06-08 AUL527 LED → CEK Jun 8, 23:35 UTCJun 8, 23:50 UTC15m

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-73658 page for operator, model, and routing details .

Mode-S 151FBA frequently asked

What is Mode-S code 151FBA?
151FBA is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73658.
Where is Mode-S 151FBA registered?
Mode-S code 151FBA is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FBA broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 06:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FBA, octal 05217672, decimal 1,384,378.
What flights does 151FBA operate?
Mode-S 151FBA has broadcast 20 distinct callsigns, including AUL505, AUL506, AUL581, AUL531, AUL533.