Apparatus

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sensors Mode-S transponder

151D4D

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73037 · BOEING 737-500

Hex
151D4D
Octal
05216515
Decimal
1,383,757
Country
RU
Tail
RA-73037
Type
B735
No current signal · last broadcast 19h ago
Flights observed
86
Distinct callsigns
20
Country
RU
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S 151D4D.

Country allocation

The ICAO 24-bit address 151D4D 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 UTair Aviation 13 2026-06-03
UTA445 UTair Aviation 9 2026-06-01
UTA334 UTair Aviation 5 2026-06-05
UTA333 UTair Aviation 5 2026-06-05
UTA6126 UTair Aviation 4 2026-06-05
UTA6125 UTair Aviation 4 2026-06-04
UTA352 UTair Aviation 4 2026-05-13
UTA180 UTair Aviation 4 2026-05-11
UTA596 UTair Aviation 3 2026-05-12
UTA595 UTair Aviation 3 2026-05-12
UTA351 UTair Aviation 3 2026-05-06
UTA6578 UTair Aviation 2 2026-05-29
UTA574 UTair Aviation 2 2026-05-08
UTA464 UTair Aviation 2 2026-05-14
UTA403 UTair Aviation 2 2026-05-22
UTA376 UTair Aviation 2 2026-05-09
UTA375 UTair Aviation 2 2026-05-09
UTA6562 UTair Aviation 1 2026-06-01
UTA6316 - 1 2026-05-06
UTA6151 - 1 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-17 UTA436B - Jun 17, 14:20 UTCJun 17, 14:40 UTC20m
2026-06-17 UTA435B - Jun 17, 08:25 UTCJun 17, 11:50 UTC3h 25m
2026-06-11 UTA413 - Jun 11, 21:30 UTCJun 12, 07:10 UTC9h 40m
2026-06-08 UTA372 MRV → DME Jun 8, 11:00 UTCJun 8, 23:50 UTC12h 50m
2026-06-07 UTA184 KZN → SGC Jun 7, 21:00 UTCJun 8, 09:00 UTC12h 0m
2026-06-07 UTA183 SGC → KZN Jun 7, 18:40 UTCJun 7, 19:05 UTC25m
2026-06-05 UTA6126 NNM → UFA Jun 5, 19:20 UTCJun 6, 16:50 UTC21h 30m
2026-06-05 UTA6126 NNM → UFA Jun 5, 19:05 UTCJun 6, 16:50 UTC21h 45m
2026-06-05 UTA333 VKO → NNM Jun 5, 15:30 UTCJun 5, 17:30 UTC2h 0m
2026-06-05 UTA334 NNM → VKO Jun 5, 09:35 UTCJun 5, 11:20 UTC1h 45m
2026-06-04 UTA6125 UFA → NNM Jun 4, 11:30 UTCJun 5, 05:35 UTC18h 5m
2026-06-04 UTA6125 UFA → NNM Jun 4, 10:25 UTCJun 5, 05:35 UTC19h 10m
2026-06-03 UTA446 KGP → VKO Jun 3, 11:40 UTCJun 4, 07:15 UTC19h 35m
2026-06-03 UTA446 KGP → VKO Jun 3, 10:40 UTCJun 4, 07:15 UTC20h 35m
2026-06-02 UTA446 KGP → VKO Jun 2, 13:15 UTCJun 3, 07:15 UTC18h 0m
2026-06-01 UTA6562 KGP → UFA Jun 1, 16:30 UTCJun 2, 13:15 UTC20h 45m
2026-06-01 UTA445 VKO → KGP Jun 1, 10:30 UTCJun 1, 16:35 UTC6h 5m
2026-05-31 UTA446 KGP → VKO May 31, 12:45 UTCJun 1, 07:05 UTC18h 20m
2026-05-30 UTA151 UFA → NJC May 30, 16:55 UTCMay 31, 12:50 UTC19h 55m
2026-05-30 UTA6151 - May 30, 12:25 UTCMay 30, 17:00 UTC4h 35m
2026-05-29 UTA6578 KGP → UFA May 29, 16:20 UTCMay 30, 12:25 UTC20h 5m
2026-05-29 UTA445 VKO → KGP May 29, 10:25 UTCMay 29, 16:30 UTC6h 5m
2026-05-28 UTA446 KGP → VKO May 28, 11:20 UTCMay 29, 07:05 UTC19h 45m
2026-05-28 UTA445 VKO → KGP May 28, 10:20 UTCMay 29, 07:05 UTC20h 45m
2026-05-27 UTA446 KGP → VKO May 27, 11:35 UTCMay 28, 07:10 UTC19h 35m
2026-05-27 UTA446 KGP → VKO May 27, 10:35 UTCMay 28, 07:10 UTC20h 35m
2026-05-26 UTA446 KGP → VKO May 26, 16:30 UTCMay 27, 07:20 UTC14h 51m
2026-05-25 UTA445 VKO → KGP May 25, 10:30 UTCMay 25, 11:45 UTC1h 15m
2026-05-24 UTA446 KGP → VKO May 24, 13:20 UTCMay 25, 07:35 UTC18h 15m
2026-05-24 UTA446 KGP → VKO May 24, 08:25 UTCMay 25, 07:15 UTC22h 50m
2026-05-23 UTA406 UFA → SGC May 23, 20:00 UTCMay 24, 13:20 UTC17h 20m
2026-05-23 UTA405 SGC → UFA May 23, 15:25 UTCMay 24, 13:20 UTC21h 55m
2026-05-22 UTA403 SGC → UFA May 22, 08:20 UTCMay 22, 16:40 UTC8h 20m
2026-05-21 UTA403 SGC → UFA May 21, 11:40 UTCMay 22, 08:30 UTC20h 50m
2026-05-21 UTA445 VKO → KGP May 21, 10:35 UTCMay 22, 08:30 UTC21h 55m
2026-05-21 UTA445 VKO → KGP May 21, 05:55 UTCMay 21, 07:20 UTC1h 25m
2026-05-20 UTA445 VKO → KGP May 20, 11:40 UTCMay 21, 07:20 UTC19h 40m
2026-05-20 UTA445 VKO → KGP May 20, 10:45 UTCMay 21, 07:20 UTC20h 35m
2026-05-19 UTA446 KGP → VKO May 19, 16:25 UTCMay 20, 07:15 UTC14h 51m
2026-05-18 UTA6125 UFA → NNM May 18, 11:40 UTCMay 19, 05:30 UTC17h 49m
2026-05-18 UTA6125 UFA → NNM May 18, 10:35 UTCMay 19, 05:30 UTC18h 54m
2026-05-17 UTA446 KGP → VKO May 17, 11:55 UTCMay 18, 07:10 UTC19h 15m
2026-05-17 UTA445 VKO → KGP May 17, 10:50 UTCMay 18, 07:10 UTC20h 20m
2026-05-16 UTA446 KGP → VKO May 16, 16:20 UTCMay 17, 08:45 UTC16h 25m
2026-05-16 UTA6578 KGP → UFA May 16, 01:10 UTCMay 16, 16:25 UTC15h 16m
2026-05-15 UTA6126 NNM → UFA May 15, 17:20 UTCMay 16, 16:25 UTC23h 6m
2026-05-15 UTA6126 NNM → UFA May 15, 15:50 UTCMay 16, 01:10 UTC9h 20m
2026-05-14 UTA464 TJM → VKO May 14, 23:20 UTCMay 15, 05:50 UTC6h 30m
2026-05-14 UTA464 TJM → VKO May 14, 07:35 UTCMay 14, 15:35 UTC8h 0m
2026-05-13 UTA352 HMA → VKO May 13, 22:10 UTCMay 14, 05:40 UTC7h 30m

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-73037 page for operator, model, and routing details .

Mode-S 151D4D frequently asked

What is Mode-S code 151D4D?
151D4D is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73037.
Where is Mode-S 151D4D registered?
Mode-S code 151D4D is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D4D broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D4D, octal 05216515, decimal 1,383,757.
What flights does 151D4D operate?
Mode-S 151D4D has broadcast 20 distinct callsigns, including UTA446, UTA445, UTA334, UTA333, UTA6126.