Apparatus

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sensors Mode-S transponder

151D50

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73040 · BOEING 737-500

Hex
151D50
Octal
05216520
Decimal
1,383,760
Country
RU
Tail
RA-73040
Type
B735
No current signal · last broadcast Jul 26, 19:10 UTC
Flights observed
167
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 19:10 UTC

Last known position

Most recent position reported by Mode-S 151D50.

Country allocation

The ICAO 24-bit address 151D50 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
UTA352 UTair Aviation 14 2026-07-24
UTA334 - 12 2026-07-17
UTA744 UTair Aviation 10 2026-07-19
UTA743 UTair Aviation 9 2026-07-19
UTA351 - 9 2026-07-23
UTA333 UTair Aviation 8 2026-07-17
UTA596 - 7 2026-07-16
UTA595 - 5 2026-07-16
UTA456 UTair Aviation 5 2026-07-14
UTA446 - 5 2026-06-17
UTA376 - 5 2026-07-11
UTA375 - 5 2026-07-11
UTA180 - 5 2026-07-06
UTA824 UTair Aviation 3 2026-06-03
UTA397 UTair Aviation 3 2026-04-16
UTA372 UTair Aviation 3 2026-06-01
UTA282 UTair Aviation 3 2026-05-30
UTA281 - 3 2026-04-15
UTA179 - 3 2026-07-17
UTA111 UTair Aviation 3 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RA73040 - Jul 26, 18:25 UTCJul 26, 19:10 UTC45m
2026-07-26 RA73040 - Jul 26, 17:20 UTCJul 26, 17:55 UTC35m
2026-07-24 UTA352 HMA → VKO Jul 24, 05:25 UTCJul 24, 06:00 UTC35m
2026-07-24 UTA352 HMA → VKO Jul 24, 04:20 UTCJul 24, 04:35 UTC15m
2026-07-23 UTA351 - Jul 23, 18:00 UTCJul 23, 19:45 UTC1h 45m
2026-07-21 UTA352 HMA → VKO Jul 21, 05:10 UTCJul 21, 05:55 UTC45m
2026-07-21 - - Jul 21, 04:05 UTCJul 21, 04:15 UTC10m
2026-07-20 UTA351 - Jul 20, 17:55 UTCJul 20, 19:35 UTC1h 40m
2026-07-19 UTA744 KVD → VKO Jul 19, 08:20 UTCJul 19, 11:20 UTC3h 0m
2026-07-19 UTA743 VKO → KVD Jul 19, 03:05 UTCJul 19, 05:50 UTC2h 45m
2026-07-18 UTA744 - Jul 18, 08:30 UTCJul 18, 11:30 UTC3h 0m
2026-07-18 UTA743 - Jul 18, 03:00 UTCJul 18, 06:25 UTC3h 25m
2026-07-17 UTA179 - Jul 17, 13:55 UTCJul 17, 19:05 UTC5h 10m
2026-07-17 UTA334 - Jul 17, 09:20 UTCJul 17, 11:35 UTC2h 15m
2026-07-17 UTA333 VKO → NNM Jul 17, 05:25 UTCJul 17, 07:44 UTC2h 20m
2026-07-16 UTA596 - Jul 16, 12:05 UTCJul 16, 14:20 UTC2h 15m
2026-07-16 UTA595 - Jul 16, 08:25 UTCJul 16, 10:55 UTC2h 30m
2026-07-16 UTA352 - Jul 16, 05:15 UTCJul 16, 06:15 UTC1h 0m
2026-07-15 UTA1351 - Jul 15, 21:35 UTCJul 16, 04:20 UTC6h 45m
2026-07-15 UTA596 - Jul 15, 12:15 UTCJul 15, 15:00 UTC2h 45m
2026-07-15 UTA595 - Jul 15, 08:10 UTCJul 15, 10:30 UTC2h 20m
2026-07-14 UTA456 NOJ → VKO Jul 14, 08:00 UTCJul 14, 15:45 UTC7h 45m
2026-07-14 UTA352 - Jul 14, 04:00 UTCJul 14, 05:30 UTC1h 30m
2026-07-13 UTA351 - Jul 13, 17:55 UTCJul 13, 18:15 UTC20m
2026-07-13 UTA352 - Jul 13, 04:55 UTCJul 13, 05:35 UTC40m
2026-07-12 UTA351 - Jul 12, 19:40 UTCJul 12, 20:55 UTC1h 15m
2026-07-12 UTA334 - Jul 12, 17:35 UTCJul 12, 18:10 UTC35m
2026-07-12 UTA334 - Jul 12, 09:15 UTCJul 12, 11:15 UTC2h 0m
2026-07-12 UTA333 - Jul 12, 05:30 UTCJul 12, 07:35 UTC2h 5m
2026-07-11 UTA376 - Jul 11, 19:10 UTCJul 11, 20:40 UTC1h 30m
2026-07-11 UTA375 - Jul 11, 16:20 UTCJul 11, 17:45 UTC1h 25m
2026-07-10 UTA352 - Jul 10, 18:15 UTCJul 11, 05:25 UTC11h 10m
2026-07-10 UTA596 - Jul 10, 14:00 UTCJul 10, 14:25 UTC25m
2026-07-10 UTA596 - Jul 10, 12:05 UTCJul 10, 13:25 UTC1h 20m
2026-07-10 UTA595 - Jul 10, 08:15 UTCJul 10, 10:30 UTC2h 15m
2026-07-10 UTA352 - Jul 10, 05:20 UTCJul 10, 05:45 UTC25m
2026-07-09 UTA351 - Jul 9, 18:05 UTCJul 10, 04:35 UTC10h 30m
2026-07-09 UTA352 - Jul 9, 05:25 UTCJul 9, 05:45 UTC20m
2026-07-08 UTA351 - Jul 8, 18:30 UTCJul 9, 04:35 UTC10h 5m
2026-07-08 UTA334 - Jul 8, 11:05 UTCJul 8, 11:25 UTC20m
2026-07-08 UTA334 - Jul 8, 09:10 UTCJul 8, 10:20 UTC1h 10m
2026-07-08 UTA333 - Jul 8, 05:30 UTCJul 8, 07:25 UTC1h 55m
2026-07-07 UTA376 - Jul 7, 20:15 UTCJul 7, 20:35 UTC20m
2026-07-07 UTA376 - Jul 7, 19:00 UTCJul 7, 19:35 UTC35m
2026-07-07 UTA375 - Jul 7, 16:15 UTCJul 7, 17:35 UTC1h 20m
2026-07-07 UTA744 - Jul 7, 10:05 UTCJul 7, 10:35 UTC30m
2026-07-07 UTA744 - Jul 7, 07:10 UTCJul 7, 09:05 UTC1h 55m
2026-07-07 UTA743 - Jul 7, 02:25 UTCJul 7, 05:15 UTC2h 50m
2026-07-06 UTA180 - Jul 6, 22:45 UTCJul 6, 23:05 UTC20m
2026-07-06 UTA179 - Jul 6, 18:10 UTCJul 6, 22:00 UTC3h 50m

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-73040 page for operator, model, and routing details .

Mode-S 151D50 frequently asked

What is Mode-S code 151D50?
151D50 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73040.
Where is Mode-S 151D50 registered?
Mode-S code 151D50 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D50 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D50, octal 05216520, decimal 1,383,760.
What flights does 151D50 operate?
Mode-S 151D50 has broadcast 20 distinct callsigns, including UTA352, UTA334, UTA744, UTA743, UTA351.