Apparatus

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sensors Mode-S transponder

151D7C

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73084 · BOEING 737-800

Hex
151D7C
Octal
05216574
Decimal
1,383,804
Country
RU
Tail
RA-73084
Type
B738
No current signal · last broadcast Jul 26, 19:30 UTC
Flights observed
172
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 19:30 UTC

Last known position

Most recent position reported by Mode-S 151D7C.

Country allocation

The ICAO 24-bit address 151D7C 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 35 2026-07-24
UTA784 UTair Aviation 29 2026-07-25
UTA810 - 13 2026-06-30
UTA786 - 10 2026-07-02
UTA785 - 8 2026-06-16
UTA295 - 8 2026-07-09
UTA809 - 7 2026-07-02
UTA728 UTair Aviation 6 2026-07-24
UTA727 - 6 2026-07-13
UTA738 UTair Aviation 5 2026-07-20
UTA802 - 3 2026-06-15
UTA296 - 3 2026-07-22
UTA248 - 3 2026-07-14
UTA247 - 3 2026-07-19
UTA801 UTair Aviation 2 2026-06-09
UTA572 - 2 2026-07-09
UTA454 UTair Aviation 2 2026-04-28
UTA453 UTair Aviation 2 2026-05-09
UTA373 UTair Aviation 2 2026-06-04
UTA364 - 2 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UTA571 VKO → KJA Jul 26, 19:15 UTCJul 26, 19:30 UTC15m
2026-07-25 UTA784 AYT → VKO Jul 25, 15:25 UTCJul 25, 17:10 UTC1h 45m
2026-07-24 UTA783 VKO → AYT Jul 24, 22:30 UTCJul 25, 13:50 UTC15h 20m
2026-07-24 UTA728 TLV → KUF Jul 24, 08:10 UTCJul 24, 22:40 UTC14h 30m
2026-07-23 UTA726 AYT → VKO Jul 23, 13:25 UTCJul 24, 06:15 UTC16h 50m
2026-07-23 UTA725 VKO → AYT Jul 23, 09:45 UTCJul 23, 11:55 UTC2h 10m
2026-07-22 UTA296 - Jul 22, 15:10 UTCJul 22, 15:50 UTC40m
2026-07-21 UTA296 - Jul 21, 18:35 UTCJul 22, 15:50 UTC21h 15m
2026-07-20 UTA738 AYT → SGC Jul 20, 09:30 UTCJul 20, 11:15 UTC1h 45m
2026-07-20 UTA737 - Jul 20, 07:00 UTCJul 20, 08:05 UTC1h 5m
2026-07-19 UTA247 SVO → SVO Jul 19, 18:10 UTCJul 19, 18:30 UTC20m
2026-07-18 UTA6132 SGC → VKO Jul 18, 17:15 UTCJul 18, 17:45 UTC30m
2026-07-16 UTA247 SVO → SVO Jul 16, 18:25 UTCJul 16, 18:55 UTC30m
2026-07-15 UTA784 - Jul 15, 18:00 UTCJul 15, 18:10 UTC10m
2026-07-15 UTA784 - Jul 15, 14:20 UTCJul 15, 16:05 UTC1h 45m
2026-07-15 UTA783 - Jul 15, 10:45 UTCJul 15, 12:40 UTC1h 55m
2026-07-15 UTA783 - Jul 15, 08:05 UTCJul 15, 08:15 UTC10m
2026-07-14 UTA248 - Jul 14, 20:25 UTCJul 15, 04:00 UTC7h 34m
2026-07-13 UTA247 - Jul 13, 23:25 UTCJul 14, 20:45 UTC21h 20m
2026-07-13 UTA728 - Jul 13, 08:01 UTCJul 13, 08:30 UTC30m
2026-07-13 UTA727 - Jul 13, 06:05 UTCJul 13, 06:30 UTC25m
2026-07-12 UTA784 - Jul 12, 14:35 UTCJul 12, 16:25 UTC1h 50m
2026-07-12 UTA783 - Jul 12, 12:50 UTCJul 12, 13:01 UTC10m
2026-07-12 UTA783 - Jul 12, 12:30 UTCJul 12, 12:45 UTC15m
2026-07-11 UTA784 - Jul 11, 15:10 UTCJul 12, 12:45 UTC21h 35m
2026-07-11 UTA784 - Jul 11, 14:20 UTCJul 12, 12:45 UTC22h 25m
2026-07-11 UTA783 - Jul 11, 12:10 UTCJul 11, 12:55 UTC45m
2026-07-10 UTA784 - Jul 10, 15:05 UTCJul 11, 12:55 UTC21h 50m
2026-07-10 UTA784 - Jul 10, 14:15 UTCJul 11, 12:55 UTC22h 40m
2026-07-10 UTA783 - Jul 10, 12:15 UTCJul 10, 12:50 UTC35m
2026-07-09 UTA572 - Jul 9, 22:35 UTCJul 10, 11:35 UTC13h 0m
2026-07-09 UTA296 - Jul 9, 16:15 UTCJul 9, 16:25 UTC10m
2026-07-09 UTA295 - Jul 9, 09:35 UTCJul 9, 09:55 UTC20m
2026-07-09 UTA295 SVO → SVO Jul 9, 08:50 UTCJul 9, 09:00 UTC10m
2026-07-08 UTA784 - Jul 8, 15:10 UTCJul 8, 17:00 UTC1h 50m
2026-07-08 UTA783 - Jul 8, 13:00 UTCJul 8, 13:40 UTC40m
2026-07-06 UTA784 - Jul 6, 14:20 UTCJul 7, 03:50 UTC13h 30m
2026-07-06 UTA783 - Jul 6, 10:25 UTCJul 6, 12:40 UTC2h 15m
2026-07-05 UTA783 - Jul 5, 15:05 UTCJul 6, 12:40 UTC21h 35m
2026-07-05 UTA784 - Jul 5, 14:45 UTCJul 6, 11:00 UTC20h 15m
2026-07-05 UTA783 - Jul 5, 10:10 UTCJul 5, 13:10 UTC3h 0m
2026-07-04 UTA783 - Jul 4, 15:10 UTCJul 5, 13:10 UTC22h 0m
2026-07-04 UTA783 - Jul 4, 14:25 UTCJul 5, 13:00 UTC22h 35m
2026-07-04 UTA783 - Jul 4, 10:45 UTCJul 4, 12:40 UTC1h 55m
2026-07-02 UTA786 - Jul 2, 23:05 UTCJul 2, 23:35 UTC30m
2026-07-02 UTA809 - Jul 2, 07:05 UTCJul 2, 07:15 UTC10m
2026-06-30 UTA810 - Jun 30, 15:35 UTCJun 30, 16:00 UTC25m
2026-06-30 UTA248 - Jun 30, 05:15 UTCJun 30, 05:45 UTC30m
2026-06-29 UTA738 AYT → SGC Jun 29, 10:44 UTCJun 30, 03:55 UTC17h 11m
2026-06-29 UTA738 AYT → SGC Jun 29, 07:05 UTCJun 30, 03:55 UTC20h 51m

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-73084 page for operator, model, and routing details .

Mode-S 151D7C frequently asked

What is Mode-S code 151D7C?
151D7C is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73084.
Where is Mode-S 151D7C registered?
Mode-S code 151D7C is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D7C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D7C, octal 05216574, decimal 1,383,804.
What flights does 151D7C operate?
Mode-S 151D7C has broadcast 20 distinct callsigns, including UTA783, UTA784, UTA810, UTA786, UTA785.