Apparatus

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sensors Mode-S transponder

151D4C

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73036 · BOEING 737-500

Hex
151D4C
Octal
05216514
Decimal
1,383,756
Country
RU
Tail
RA-73036
Type
B735
No current signal · last broadcast 8d ago
Flights observed
62
Distinct callsigns
20
Country
RU
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 151D4C.

Country allocation

The ICAO 24-bit address 151D4C 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
UTA446 - 16 2026-06-21
UTA445 - 11 2026-06-22
UTA9901 - 2 2026-04-16
UTA9801 - 2 2026-04-16
UTA6578 UTair Aviation 2 2026-06-23
UTA478 UTair Aviation 2 2026-05-06
UTA411 UTair Aviation 2 2026-04-29
UTA333 UTair Aviation 2 2026-06-16
UTA282 UTair Aviation 2 2026-06-03
UTA96 - 1 2026-06-15
UTA95 - 1 2026-06-15
UTA6577 UTair Aviation 1 2026-06-08
UTA6490 UTair Aviation 1 2026-05-11
UTA6472 UTair Aviation 1 2026-06-06
UTA6429 UTair Aviation 1 2026-05-11
UTA6316 - 1 2026-06-17
UTA6150 UTair Aviation 1 2026-07-20
UTA6149 UTair Aviation 1 2026-07-19
UTA6129 - 1 2026-07-20
UTA6126 UTair Aviation 1 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 UTA6150 - Jul 20, 09:40 UTCJul 20, 10:05 UTC25m
2026-07-20 UTA6129 - Jul 20, 00:10 UTCJul 20, 08:35 UTC8h 25m
2026-07-19 UTA6149 KJA → TOF Jul 19, 22:30 UTCJul 19, 22:55 UTC25m
2026-06-23 UTA6578 KGP → UFA Jun 23, 13:45 UTCJun 24, 03:15 UTC13h 30m
2026-06-22 UTA445 - Jun 22, 10:34 UTCJun 22, 12:00 UTC1h 25m
2026-06-21 UTA446 - Jun 21, 16:30 UTCJun 22, 07:45 UTC15h 15m
2026-06-21 UTA446 - Jun 21, 11:30 UTCJun 22, 07:45 UTC20h 15m
2026-06-21 UTA446 - Jun 21, 10:29 UTCJun 22, 07:45 UTC21h 15m
2026-06-21 UTA446 - Jun 21, 06:55 UTCJun 21, 07:29 UTC35m
2026-06-21 UTA446 - Jun 21, 01:25 UTCJun 21, 06:19 UTC4h 55m
2026-06-19 UTA445 - Jun 19, 10:39 UTCJun 19, 11:54 UTC1h 15m
2026-06-18 UTA446 - Jun 18, 21:45 UTCJun 19, 08:04 UTC10h 19m
2026-06-18 UTA576 - Jun 18, 16:25 UTCJun 18, 19:20 UTC2h 55m
2026-06-18 UTA575 VKO → KRR Jun 18, 11:15 UTCJun 18, 14:25 UTC3h 10m
2026-06-17 UTA180 UCT → VKO Jun 17, 13:15 UTCJun 17, 18:15 UTC5h 0m
2026-06-17 UTA6316 - Jun 17, 02:30 UTCJun 17, 11:15 UTC8h 45m
2026-06-16 UTA333 VKO → NNM Jun 16, 12:05 UTCJun 16, 14:25 UTC2h 20m
2026-06-16 UTA333 VKO → NNM Jun 16, 07:34 UTCJun 16, 09:40 UTC2h 5m
2026-06-15 UTA1376 SCW → VKO Jun 15, 19:55 UTCJun 15, 21:45 UTC1h 50m
2026-06-15 UTA375 VKO → SCW Jun 15, 17:04 UTCJun 15, 18:29 UTC1h 25m
2026-06-15 UTA96 - Jun 15, 12:10 UTCJun 15, 14:34 UTC2h 25m
2026-06-15 UTA95 - Jun 15, 08:20 UTCJun 15, 10:35 UTC2h 15m
2026-06-14 UTA445 VKO → KGP Jun 14, 11:05 UTCJun 15, 07:00 UTC19h 55m
2026-06-14 UTA445 VKO → KGP Jun 14, 10:50 UTCJun 15, 07:00 UTC20h 10m
2026-06-13 UTA446 - Jun 13, 16:20 UTCJun 14, 07:55 UTC15h 36m
2026-06-12 UTA6126 NNM → UFA Jun 12, 14:45 UTCJun 12, 15:10 UTC25m
2026-06-11 UTA445 VKO → KGP Jun 11, 11:05 UTCJun 12, 05:30 UTC18h 26m
2026-06-11 UTA445 VKO → KGP Jun 11, 10:40 UTCJun 12, 05:30 UTC18h 51m
2026-06-10 UTA446 KGP → VKO Jun 10, 16:30 UTCJun 11, 07:20 UTC14h 50m
2026-06-10 UTA446 KGP → VKO Jun 10, 11:05 UTCJun 11, 07:20 UTC20h 15m
2026-06-10 UTA446 KGP → VKO Jun 10, 10:55 UTCJun 11, 07:20 UTC20h 25m
2026-06-10 UTA446 KGP → VKO Jun 10, 06:50 UTCJun 10, 07:20 UTC30m
2026-06-09 UTA446 KGP → VKO Jun 9, 13:10 UTCJun 10, 06:05 UTC16h 55m
2026-06-09 UTA446 KGP → VKO Jun 9, 08:20 UTCJun 10, 06:05 UTC21h 45m
2026-06-08 UTA6578 KGP → UFA Jun 8, 16:25 UTCJun 9, 13:10 UTC20h 45m
2026-06-08 UTA445 VKO → KGP Jun 8, 11:30 UTCJun 9, 08:20 UTC20h 50m
2026-06-08 UTA445 VKO → KGP Jun 8, 10:30 UTCJun 9, 08:20 UTC21h 50m
2026-06-08 UTA6577 UFA → KGP Jun 8, 06:55 UTCJun 8, 07:10 UTC15m
2026-06-07 UTA445 VKO → KGP Jun 7, 11:05 UTCJun 8, 06:10 UTC19h 5m
2026-06-07 UTA445 VKO → KGP Jun 7, 10:40 UTCJun 8, 06:10 UTC19h 30m
2026-06-06 UTA446 KGP → VKO Jun 6, 15:34 UTCJun 7, 07:05 UTC15h 30m
2026-06-06 UTA446 KGP → VKO Jun 6, 07:05 UTCJun 7, 07:00 UTC23h 55m
2026-06-06 UTA6472 TLK → OMS Jun 6, 06:30 UTCJun 6, 15:34 UTC9h 5m
2026-06-04 UTA372 MRV → DME Jun 4, 18:20 UTCJun 5, 00:00 UTC5h 40m
2026-06-03 UTA282 KUF → SVX Jun 3, 07:35 UTCJun 3, 10:30 UTC2h 55m
2026-05-11 UTA6490 KUF → VKO May 11, 18:45 UTCMay 12, 04:05 UTC9h 20m
2026-05-11 UTA6429 SGC → GSV May 11, 15:50 UTCMay 11, 17:25 UTC1h 35m
2026-05-09 UTA406 UFA → SGC May 9, 01:05 UTCMay 9, 20:05 UTC19h 0m
2026-05-08 UTA445 VKO → KGP May 8, 10:29 UTCMay 9, 01:05 UTC14h 35m
2026-05-08 UTA446 KGP → VKO May 8, 01:00 UTCMay 8, 07:39 UTC6h 40m

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-73036 page for operator, model, and routing details .

Mode-S 151D4C frequently asked

What is Mode-S code 151D4C?
151D4C is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73036.
Where is Mode-S 151D4C registered?
Mode-S code 151D4C is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D4C broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D4C, octal 05216514, decimal 1,383,756.
What flights does 151D4C operate?
Mode-S 151D4C has broadcast 20 distinct callsigns, including UTA446, UTA445, UTA9901, UTA9801, UTA6578.