Apparatus

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sensors Mode-S transponder

151D7D

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73085 · BOEING 737-800

Hex
151D7D
Octal
05216575
Decimal
1,383,805
Country
RU
Tail
RA-73085
Type
B738
No current signal · last broadcast 5h ago
Flights observed
116
Distinct callsigns
20
Country
RU
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 151D7D.

Country allocation

The ICAO 24-bit address 151D7D 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
UTA469 - 32 2026-07-14
UTA746 UTair Aviation 8 2026-06-05
UTA731 UTair Aviation 8 2026-06-16
UTA470 - 8 2026-06-27
UTA571 - 7 2026-06-24
UTA805 UTair Aviation 5 2026-05-14
UTA786 - 5 2026-07-07
UTA745 UTair Aviation 5 2026-05-12
UTA785 - 4 2026-07-07
UTA881 UTair Aviation 3 2026-06-21
UTA806 UTair Aviation 3 2026-05-14
UTA784 - 3 2026-07-02
UTA783 - 3 2026-07-02
UTA248 - 3 2026-06-21
UTA732 UTair Aviation 2 2026-06-12
UTA364 UTair Aviation 2 2026-04-13
UTA358 UTair Aviation 2 2026-06-04
UTA808 - 1 2026-07-02
UTA807 - 1 2026-04-13
UTA742 - 1 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UTA469 - Jul 14, 03:40 UTCJul 14, 05:05 UTC1h 25m
2026-07-13 UTA469 - Jul 13, 03:40 UTCJul 13, 05:10 UTC1h 30m
2026-07-11 UTA726 - Jul 11, 23:20 UTCJul 12, 01:05 UTC1h 45m
2026-07-11 UTA725 - Jul 11, 20:55 UTCJul 11, 22:01 UTC1h 5m
2026-07-10 UTA469 - Jul 10, 03:50 UTCJul 10, 05:20 UTC1h 30m
2026-07-07 UTA786 - Jul 7, 23:10 UTCJul 7, 23:35 UTC25m
2026-07-07 UTA785 - Jul 7, 14:10 UTCJul 7, 21:15 UTC7h 5m
2026-07-05 UTA363 - Jul 5, 18:05 UTCJul 5, 18:25 UTC20m
2026-07-05 UTA742 - Jul 5, 08:00 UTCJul 5, 09:40 UTC1h 40m
2026-07-02 UTA784 - Jul 2, 14:00 UTCJul 2, 15:50 UTC1h 50m
2026-07-02 UTA783 - Jul 2, 11:40 UTCJul 2, 12:20 UTC40m
2026-07-02 UTA808 - Jul 2, 05:05 UTCJul 2, 05:30 UTC25m
2026-07-01 UTA784 - Jul 1, 14:10 UTCJul 2, 04:10 UTC14h 0m
2026-07-01 UTA783 - Jul 1, 10:15 UTCJul 1, 12:25 UTC2h 10m
2026-06-28 UTA784 - Jun 28, 14:04 UTCJun 28, 16:00 UTC1h 55m
2026-06-28 UTA783 - Jun 28, 11:55 UTCJun 28, 12:25 UTC30m
2026-06-27 UTA470 - Jun 27, 21:40 UTCJun 28, 11:14 UTC13h 35m
2026-06-27 UTA469 - Jun 27, 04:09 UTCJun 27, 22:04 UTC17h 55m
2026-06-25 UTA786 - Jun 25, 22:59 UTCJun 25, 23:30 UTC30m
2026-06-24 UTA571 - Jun 24, 22:29 UTCJun 25, 21:15 UTC22h 45m
2026-06-24 UTA571 - Jun 24, 09:05 UTCJun 25, 01:35 UTC16h 30m
2026-06-24 UTA571 - Jun 24, 01:19 UTCJun 25, 01:14 UTC23h 55m
2026-06-24 UTA571 - Jun 24, 00:49 UTCJun 24, 23:04 UTC22h 15m
2026-06-23 UTA571 - Jun 23, 22:25 UTCJun 24, 09:19 UTC10h 55m
2026-06-23 UTA571 SVO → SVO Jun 23, 18:55 UTCJun 23, 19:04 UTC10m
2026-06-22 UTA571 - Jun 22, 19:09 UTCJun 23, 01:35 UTC6h 25m
2026-06-21 UTA248 - Jun 21, 17:24 UTCJun 22, 06:00 UTC12h 35m
2026-06-21 UTA881 LED → SKD Jun 21, 08:20 UTCJun 22, 06:00 UTC21h 40m
2026-06-20 UTA469 - Jun 20, 21:34 UTCJun 21, 05:10 UTC7h 35m
2026-06-20 UTA469 - Jun 20, 08:14 UTCJun 21, 05:10 UTC20h 55m
2026-06-19 UTA469 - Jun 19, 20:49 UTCJun 20, 06:14 UTC9h 25m
2026-06-19 UTA469 - Jun 19, 03:39 UTCJun 19, 22:09 UTC18h 30m
2026-06-18 UTA469 - Jun 18, 22:35 UTCJun 19, 20:59 UTC22h 24m
2026-06-18 UTA469 - Jun 18, 03:35 UTCJun 18, 22:50 UTC19h 15m
2026-06-17 UTA469 - Jun 17, 21:55 UTCJun 18, 05:00 UTC7h 5m
2026-06-16 UTA731 LED → GYD Jun 16, 08:05 UTCJun 16, 08:30 UTC25m
2026-06-15 UTA469 - Jun 15, 16:59 UTCJun 16, 05:50 UTC12h 50m
2026-06-15 UTA469 - Jun 15, 08:25 UTCJun 16, 05:50 UTC21h 25m
2026-06-15 UTA469 - Jun 15, 03:40 UTCJun 15, 05:00 UTC1h 20m
2026-06-13 UTA470 LED → SGC Jun 13, 08:10 UTCJun 13, 22:00 UTC13h 50m
2026-06-12 UTA470 LED → SGC Jun 12, 20:35 UTCJun 12, 20:55 UTC20m
2026-06-12 UTA732 GYD → LED Jun 12, 14:01 UTCJun 12, 14:35 UTC35m
2026-06-12 UTA731 LED → GYD Jun 12, 08:20 UTCJun 12, 08:50 UTC30m
2026-06-11 UTA469 SGC → LED Jun 11, 13:15 UTCJun 12, 04:55 UTC15h 40m
2026-06-07 UTA572 KJA → VKO Jun 7, 19:00 UTCJun 8, 03:55 UTC8h 55m
2026-06-06 UTA786 EVN → VKO Jun 6, 01:10 UTCJun 6, 14:54 UTC13h 45m
2026-06-05 UTA746 GYD → VKO Jun 5, 14:35 UTCJun 5, 23:05 UTC8h 30m
2026-06-04 UTA358 KUF → VKO Jun 4, 10:50 UTCJun 4, 21:45 UTC10h 55m
2026-06-03 UTA6135 - Jun 3, 22:05 UTCJun 4, 21:15 UTC23h 10m
2026-06-02 UTA358 KUF → VKO Jun 2, 19:50 UTCJun 2, 20:25 UTC35m

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-73085 page for operator, model, and routing details .

Mode-S 151D7D frequently asked

What is Mode-S code 151D7D?
151D7D is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73085.
Where is Mode-S 151D7D registered?
Mode-S code 151D7D is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D7D broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D7D, octal 05216575, decimal 1,383,805.
What flights does 151D7D operate?
Mode-S 151D7D has broadcast 20 distinct callsigns, including UTA469, UTA746, UTA731, UTA470, UTA571.