Apparatus

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sensors Mode-S transponder

151D83

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73091 · BOEING 737-800

Hex
151D83
Octal
05216603
Decimal
1,383,811
Country
RU
Tail
RA-73091
Type
B738
No current signal · last broadcast 1d ago
Flights observed
91
Distinct callsigns
20
Country
RU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 151D83.

Country allocation

The ICAO 24-bit address 151D83 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
UTA783 UTair Aviation 10 2026-05-28
UTA469 - 9 2026-07-12
UTA784 UTair Aviation 8 2026-05-28
UTA728 - 7 2026-07-08
UTA810 UTair Aviation 6 2026-05-19
UTA738 - 4 2026-07-13
UTA737 - 4 2026-07-12
UTA882 UTair Aviation 3 2026-06-04
UTA875 UTair Aviation 3 2026-04-26
UTA811 UTair Aviation 3 2026-04-28
UTA808 UTair Aviation 3 2026-05-25
UTA806 UTair Aviation 3 2026-05-10
UTA454 UTair Aviation 3 2026-04-27
UTA296 UTair Aviation 3 2026-06-05
UTA810B - 2 2026-05-11
UTA786 UTair Aviation 2 2026-05-12
UTA727 - 2 2026-07-08
UTA881 UTair Aviation 1 2026-06-04
UTA812 UTair Aviation 1 2026-04-28
UTA809 UTair Aviation 1 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UTA738 - Jul 13, 11:25 UTCJul 13, 13:10 UTC1h 45m
2026-07-12 UTA737 - Jul 12, 22:40 UTCJul 13, 09:00 UTC10h 20m
2026-07-12 UTA469 - Jul 12, 04:50 UTCJul 12, 22:55 UTC18h 5m
2026-07-12 UTA469 - Jul 12, 03:45 UTCJul 12, 22:55 UTC19h 10m
2026-07-08 UTA728 - Jul 8, 09:20 UTCJul 8, 09:45 UTC25m
2026-07-08 UTA727 - Jul 8, 07:20 UTCJul 8, 07:30 UTC10m
2026-07-06 UTA469 - Jul 6, 03:45 UTCJul 6, 22:45 UTC19h 0m
2026-06-29 UTA469 - Jun 29, 04:20 UTCJun 29, 04:50 UTC30m
2026-06-28 UTA469 - Jun 28, 08:25 UTCJun 29, 04:50 UTC20h 25m
2026-06-28 UTA469 - Jun 28, 04:15 UTCJun 28, 05:04 UTC50m
2026-06-24 UTA6135 - Jun 24, 01:19 UTCJun 24, 12:09 UTC10h 50m
2026-06-22 UTA738 AYT → SGC Jun 22, 10:15 UTCJun 22, 12:05 UTC1h 50m
2026-06-21 UTA737 SGC → AYT Jun 21, 14:40 UTCJun 22, 08:40 UTC18h 0m
2026-06-17 UTA435 SGC → KRR Jun 17, 11:00 UTCJun 17, 11:35 UTC35m
2026-06-15 UTA738 AYT → SGC Jun 15, 21:50 UTCJun 15, 23:45 UTC1h 55m
2026-06-15 UTA737 SGC → AYT Jun 15, 01:55 UTCJun 15, 20:25 UTC18h 30m
2026-06-14 UTA737 SGC → AYT Jun 14, 19:20 UTCJun 15, 18:45 UTC23h 24m
2026-06-14 UTA469 - Jun 14, 13:10 UTCJun 15, 02:10 UTC12h 59m
2026-06-13 UTA481 SGC → MRV Jun 13, 04:10 UTCJun 13, 05:10 UTC1h 0m
2026-06-10 UTA513 TJM → AER Jun 10, 16:55 UTCJun 10, 18:05 UTC1h 10m
2026-06-08 UTA738 AYT → SGC Jun 8, 09:45 UTCJun 8, 12:30 UTC2h 45m
2026-06-07 UTA730 IST → UFA Jun 7, 14:20 UTCJun 8, 08:10 UTC17h 50m
2026-06-07 UTA729 UFA → IST Jun 7, 12:00 UTCJun 7, 12:30 UTC30m
2026-06-05 UTA296 SGC → VKO Jun 5, 03:40 UTCJun 5, 21:40 UTC18h 0m
2026-06-04 UTA296 SGC → VKO Jun 4, 21:50 UTCJun 5, 16:25 UTC18h 35m
2026-06-04 UTA882 SKD → LED Jun 4, 16:55 UTCJun 5, 16:25 UTC23h 30m
2026-06-04 UTA882 SKD → LED Jun 4, 10:10 UTCJun 5, 04:05 UTC17h 55m
2026-06-04 UTA881 LED → SKD Jun 4, 08:25 UTCJun 4, 08:45 UTC20m
2026-06-04 UTA469 SGC → LED Jun 4, 03:50 UTCJun 4, 05:10 UTC1h 20m
2026-06-01 UTA882 SKD → LED Jun 1, 17:10 UTCJun 2, 14:10 UTC21h 0m
2026-06-01 UTA469 SGC → LED Jun 1, 03:30 UTCJun 1, 17:40 UTC14h 10m
2026-05-31 UTA247 VKO → SGC May 31, 18:15 UTCMay 31, 18:35 UTC20m
2026-05-30 UTA464 TJM → VKO May 30, 18:00 UTCMay 31, 13:40 UTC19h 40m
2026-05-30 UTA742 AYT → GRV May 30, 07:40 UTCMay 30, 18:00 UTC10h 20m
2026-05-30 UTA741 GRV → AYT May 30, 05:00 UTCMay 30, 05:30 UTC30m
2026-05-29 UTA728 TLV → KUF May 29, 07:35 UTCMay 29, 08:00 UTC25m
2026-05-29 UTA727 KUF → TLV May 29, 05:45 UTCMay 29, 06:10 UTC25m
2026-05-28 UTA784 AYT → VKO May 28, 14:05 UTCMay 28, 16:00 UTC1h 55m
2026-05-28 UTA783 VKO → AYT May 28, 12:10 UTCMay 28, 12:30 UTC20m
2026-05-27 UTA728 TLV → KUF May 27, 08:30 UTCMay 27, 17:50 UTC9h 20m
2026-05-26 UTA784 AYT → VKO May 26, 16:50 UTCMay 26, 18:55 UTC2h 5m
2026-05-26 UTA783 VKO → AYT May 26, 11:44 UTCMay 26, 12:00 UTC15m
2026-05-25 UTA808 BHK → VKO May 25, 21:30 UTCMay 26, 11:05 UTC13h 35m
2026-05-25 UTA808 BHK → VKO May 25, 10:35 UTCMay 26, 04:15 UTC17h 40m
2026-05-24 UTA784 AYT → VKO May 24, 15:20 UTCMay 25, 10:40 UTC19h 20m
2026-05-24 UTA784 AYT → VKO May 24, 14:20 UTCMay 25, 10:40 UTC20h 20m
2026-05-24 UTA783 VKO → AYT May 24, 11:50 UTCMay 24, 12:05 UTC15m
2026-05-24 UTA783 VKO → AYT May 24, 10:40 UTCMay 24, 11:10 UTC30m
2026-05-23 UTA784 AYT → VKO May 23, 14:55 UTCMay 24, 11:10 UTC20h 15m
2026-05-23 UTA783 VKO → AYT May 23, 12:10 UTCMay 23, 12:40 UTC30m

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-73091 page for operator, model, and routing details .

Mode-S 151D83 frequently asked

What is Mode-S code 151D83?
151D83 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73091.
Where is Mode-S 151D83 registered?
Mode-S code 151D83 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D83 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D83, octal 05216603, decimal 1,383,811.
What flights does 151D83 operate?
Mode-S 151D83 has broadcast 20 distinct callsigns, including UTA783, UTA469, UTA784, UTA728, UTA810.