Apparatus

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sensors Mode-S transponder

151D91

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73105 · BOEING 737-800

Hex
151D91
Octal
05216621
Decimal
1,383,825
Country
RU
Tail
RA-73105
Type
B738
No current signal · last broadcast Jul 26, 10:25 UTC
Flights observed
146
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 10:25 UTC

Last known position

Most recent position reported by Mode-S 151D91.

Country allocation

The ICAO 24-bit address 151D91 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
AFL1455 Aeroflot Russian Airlines 14 2026-07-19
AFL1563 Aeroflot Russian Airlines 12 2026-07-26
AFL1443 - 11 2026-07-12
AFL1751 - 9 2026-06-18
AFL1562 Aeroflot Russian Airlines 7 2026-07-25
AFL1454 - 7 2026-06-25
AFL2933 Aeroflot Russian Airlines 4 2026-04-28
AFL1539 - 4 2026-07-09
AFL1538 - 4 2026-07-09
AFL1444 - 4 2026-07-04
AFL1440 - 4 2026-07-23
AFL1383 Aeroflot Russian Airlines 4 2026-07-23
AFL1568 Aeroflot Russian Airlines 3 2026-07-20
AFL1491 Aeroflot Russian Airlines 3 2026-05-18
AFL1486 - 3 2026-06-29
AFL1445 Aeroflot Russian Airlines 3 2026-05-06
AFL2932 Aeroflot Russian Airlines 2 2026-04-26
AFL1689 Aeroflot Russian Airlines 2 2026-05-22
AFL1490 Aeroflot Russian Airlines 2 2026-05-30
AFL1487 Aeroflot Russian Airlines 2 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFL1563 IKT → SVO Jul 26, 02:10 UTCJul 26, 10:25 UTC8h 16m
2026-07-25 AFL1562 SVO → IKT Jul 25, 22:55 UTCJul 25, 23:10 UTC15m
2026-07-25 AFL1519 RGK → SVO Jul 25, 12:20 UTCJul 25, 12:30 UTC10m
2026-07-23 AFL1440 - Jul 23, 19:40 UTCJul 24, 11:20 UTC15h 40m
2026-07-23 AFL1095 CEK → SVO Jul 23, 07:55 UTCJul 23, 20:10 UTC12h 15m
2026-07-23 AFL1383 HMA → SVO Jul 23, 03:20 UTCJul 23, 03:50 UTC30m
2026-07-22 AFL1383 HMA → SVO Jul 22, 04:20 UTCJul 23, 03:50 UTC23h 30m
2026-07-22 AFL1477 UUD → SVO Jul 22, 01:20 UTCJul 22, 04:30 UTC3h 10m
2026-07-21 AFL1320 SVO → SVO Jul 21, 06:40 UTCJul 21, 06:55 UTC15m
2026-07-20 AFL1568 SVO → TJM Jul 20, 23:15 UTCJul 20, 23:25 UTC10m
2026-07-19 AFL1455 UUD → SVO Jul 19, 22:10 UTCJul 20, 06:10 UTC8h 0m
2026-07-19 AFL1498 SVO → SVO Jul 19, 06:00 UTCJul 19, 06:30 UTC30m
2026-07-18 AFL1688 SVO → SVO Jul 18, 07:05 UTCJul 18, 07:20 UTC15m
2026-07-17 AFL1843 - Jul 17, 11:55 UTCJul 17, 12:15 UTC20m
2026-07-16 AFL1455 - Jul 16, 22:35 UTCJul 17, 06:50 UTC8h 15m
2026-07-15 AFL1638 SVO → SVO Jul 15, 22:05 UTCJul 15, 22:40 UTC35m
2026-07-15 AFL1402 - Jul 15, 08:25 UTCJul 15, 09:55 UTC1h 30m
2026-07-13 AFL1777 - Jul 13, 19:05 UTCJul 13, 19:15 UTC10m
2026-07-12 AFL1443 - Jul 12, 10:05 UTCJul 13, 03:55 UTC17h 50m
2026-07-12 AFL1443 - Jul 12, 07:15 UTCJul 13, 03:55 UTC20h 40m
2026-07-12 AFL1443 - Jul 12, 00:35 UTCJul 12, 22:15 UTC21h 40m
2026-07-11 AFL1383 - Jul 11, 03:35 UTCJul 11, 04:01 UTC25m
2026-07-09 AFL1539 - Jul 9, 12:05 UTCJul 10, 03:30 UTC15h 25m
2026-07-09 AFL1538 - Jul 9, 10:05 UTCJul 9, 10:20 UTC15m
2026-07-08 AFL1563 - Jul 8, 07:05 UTCJul 8, 07:45 UTC40m
2026-07-06 AFL1138 SVO → SVO Jul 6, 07:00 UTCJul 6, 07:25 UTC25m
2026-07-05 AFL1477 - Jul 5, 18:50 UTCJul 6, 03:05 UTC8h 15m
2026-07-04 AFL1444 - Jul 4, 08:15 UTCJul 4, 16:30 UTC8h 15m
2026-07-02 AFL1402 SVO → SVO Jul 2, 08:35 UTCJul 2, 09:00 UTC25m
2026-07-01 AFL1476 SVO → UUD Jul 1, 16:10 UTCJul 2, 00:25 UTC8h 15m
2026-07-01 AFL1476 SVO → UUD Jul 1, 15:15 UTCJul 1, 15:30 UTC15m
2026-06-29 AFL1486 - Jun 29, 10:34 UTCJun 29, 10:59 UTC25m
2026-06-27 AFL1443 - Jun 27, 23:39 UTCJun 28, 07:34 UTC7h 55m
2026-06-27 AFL1258 - Jun 27, 13:04 UTCJun 27, 13:24 UTC20m
2026-06-26 AAFL1455 - Jun 26, 03:10 UTCJun 26, 03:34 UTC25m
2026-06-25 AFL1454 SVO → SVO Jun 25, 18:24 UTCJun 25, 18:45 UTC20m
2026-06-25 AFL1074 SVO → AER Jun 25, 02:05 UTCJun 25, 02:30 UTC25m
2026-06-24 AFL1486 - Jun 24, 08:14 UTCJun 24, 16:24 UTC8h 10m
2026-06-24 AFL1486 SVO → SVO Jun 24, 07:20 UTCJun 24, 07:44 UTC25m
2026-06-23 AFL1487 KJA → SVO Jun 23, 10:55 UTCJun 23, 13:29 UTC2h 35m
2026-06-21 AFL1568 SVO → TJM Jun 21, 21:44 UTCJun 21, 22:04 UTC20m
2026-06-21 AFL1487 KJA → SVO Jun 21, 10:34 UTCJun 21, 16:14 UTC5h 40m
2026-06-19 AFL1444 - Jun 19, 08:09 UTCJun 19, 13:50 UTC5h 40m
2026-06-18 AFL1444 - Jun 18, 10:20 UTCJun 19, 08:50 UTC22h 29m
2026-06-18 AFL1751 - Jun 18, 09:00 UTCJun 19, 08:14 UTC23h 14m
2026-06-17 AFL1751 - Jun 17, 22:20 UTCJun 18, 10:40 UTC12h 20m
2026-06-17 AFL1750 SVO → YKS Jun 17, 21:25 UTCJun 17, 21:45 UTC20m
2026-06-14 AFL1562 - Jun 14, 02:50 UTCJun 14, 08:15 UTC5h 25m
2026-06-12 AFL1454 SVO → UUD Jun 12, 19:20 UTCJun 13, 03:50 UTC8h 30m
2026-06-10 AFL1455 UUD → SVO Jun 10, 22:25 UTCJun 11, 04:25 UTC6h 0m

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-73105 page for operator, model, and routing details .

Mode-S 151D91 frequently asked

What is Mode-S code 151D91?
151D91 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73105.
Where is Mode-S 151D91 registered?
Mode-S code 151D91 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D91 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D91, octal 05216621, decimal 1,383,825.
What flights does 151D91 operate?
Mode-S 151D91 has broadcast 20 distinct callsigns, including AFL1455, AFL1563, AFL1443, AFL1751, AFL1562.