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 21h ago
Flights observed
56
Distinct callsigns
18
Country
RU
Last broadcast
21h 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 18 distinct

Callsign Airline Flights Last seen
UTA783 UTair Aviation 10 2026-05-28
UTA784 UTair Aviation 8 2026-05-28
UTA810 UTair Aviation 6 2026-05-19
UTA728 UTair Aviation 6 2026-05-29
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
UTA810B - 2 2026-05-11
UTA786 UTair Aviation 2 2026-05-12
UTA812 UTair Aviation 1 2026-04-28
UTA809 UTair Aviation 1 2026-04-29
UTA785 UTair Aviation 1 2026-05-12
UTA727 UTair Aviation 1 2026-05-29
UTA400 UTair Aviation 1 2026-04-21
UTA374 UTair Aviation 1 2026-05-17
UTA296 - 1 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-05-23 UTA783 VKO → AYT May 23, 10:35 UTCMay 23, 11:25 UTC50m
2026-05-22 UTA784 AYT → VKO May 22, 14:50 UTCMay 23, 11:25 UTC20h 34m
2026-05-22 UTA783 VKO → AYT May 22, 12:50 UTCMay 22, 13:10 UTC20m
2026-05-22 UTA783 VKO → AYT May 22, 11:35 UTCMay 22, 12:00 UTC25m
2026-05-19 UTA810 SKD → VKO May 19, 21:00 UTCMay 19, 21:10 UTC10m
2026-05-18 UTA728 TLV → KUF May 18, 08:01 UTCMay 18, 08:10 UTC10m
2026-05-17 UTA374 MRV → VKO May 17, 15:45 UTCMay 17, 16:01 UTC15m
2026-05-16 UTA810 SKD → VKO May 16, 20:00 UTCMay 16, 20:15 UTC15m
2026-05-16 UTA808 BHK → VKO May 16, 08:01 UTCMay 16, 08:20 UTC20m
2026-05-14 UTA784 AYT → VKO May 14, 18:00 UTCMay 14, 18:25 UTC25m
2026-05-14 UTA784 AYT → VKO May 14, 14:15 UTCMay 14, 16:30 UTC2h 15m
2026-05-14 UTA783 VKO → AYT May 14, 12:25 UTCMay 14, 12:45 UTC20m
2026-05-14 UTA783 VKO → AYT May 14, 02:45 UTCMay 14, 11:35 UTC8h 50m
2026-05-12 UTA786 EVN → VKO May 12, 23:10 UTCMay 12, 23:40 UTC30m
2026-05-12 UTA785 VKO → EVN May 12, 20:55 UTCMay 12, 21:10 UTC15m
2026-05-11 UTA810 SKD → VKO May 11, 07:55 UTCMay 11, 20:55 UTC13h 1m
2026-05-11 UTA810B - May 11, 01:15 UTCMay 11, 20:55 UTC19h 41m
2026-05-10 UTA810B - May 10, 18:49 UTCMay 11, 14:55 UTC20h 5m
2026-05-10 UTA810 SKD → VKO May 10, 14:54 UTCMay 11, 14:45 UTC23h 50m
2026-05-10 UTA806 TAS → VKO May 10, 01:14 UTCMay 10, 18:55 UTC17h 40m
2026-05-09 UTA806 TAS → VKO May 9, 18:25 UTCMay 10, 15:35 UTC21h 10m
2026-05-09 UTA806 TAS → VKO May 9, 04:00 UTCMay 10, 01:55 UTC21h 55m
2026-05-02 UTA728 TLV → KUF May 2, 07:40 UTCMay 3, 04:05 UTC20h 24m
2026-05-01 UTA810 SKD → VKO May 1, 14:40 UTCMay 2, 07:45 UTC17h 6m
2026-05-01 UTA810 SKD → VKO May 1, 08:00 UTCMay 1, 15:15 UTC7h 15m
2026-04-29 UTA809 VKO → SKD Apr 29, 08:05 UTCApr 29, 08:15 UTC10m
2026-04-28 UTA812 AYT → TJM Apr 28, 10:50 UTCApr 29, 08:15 UTC21h 25m
2026-04-28 UTA811 TJM → AYT Apr 28, 09:05 UTCApr 28, 09:15 UTC10m
2026-04-27 UTA811 TJM → AYT Apr 27, 23:00 UTCApr 28, 08:15 UTC9h 15m
2026-04-27 UTA811 TJM → AYT Apr 27, 09:35 UTCApr 28, 08:15 UTC22h 40m
2026-04-27 UTA454 TJM → VKO Apr 27, 03:00 UTCApr 27, 23:05 UTC20h 5m
2026-04-26 UTA454 TJM → VKO Apr 26, 07:40 UTCApr 27, 04:10 UTC20h 30m
2026-04-26 UTA875 TJM → EVN Apr 26, 04:30 UTCApr 26, 05:55 UTC1h 25m
2026-04-25 UTA875 TJM → EVN Apr 25, 08:05 UTCApr 26, 05:55 UTC21h 50m
2026-04-25 UTA875 TJM → EVN Apr 25, 04:50 UTCApr 26, 04:45 UTC23h 55m

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 21h 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 18 distinct callsigns, including UTA783, UTA784, UTA810, UTA728, UTA875.