sensors Mode-S transponder

151D4E

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73038 · BOEING 737-500

Hex
151D4E
Octal
05216516
Decimal
1,383,758
Country
RU
Tail
RA-73038
Type
B735
No current signal · last broadcast 3d ago
Flights observed
84
Distinct callsigns
20
Country
RU
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 151D4E.

Country allocation

The ICAO 24-bit address 151D4E 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
UTA333 UTair Aviation 7 2026-05-05
UTA596 UTair Aviation 6 2026-05-08
UTA446 UTair Aviation 6 2026-05-14
UTA595 UTair Aviation 5 2026-05-08
UTA478 UTair Aviation 5 2026-05-21
UTA375 UTair Aviation 5 2026-05-06
UTA456 UTair Aviation 4 2026-05-09
UTA445 UTair Aviation 4 2026-05-15
UTA352 UTair Aviation 4 2026-05-08
UTA351 UTair Aviation 4 2026-05-08
UTA376 UTair Aviation 3 2026-05-06
UTA6578 UTair Aviation 2 2026-05-15
UTA6436 - 2 2026-04-13
UTA574 UTair Aviation 2 2026-04-25
UTA424 UTair Aviation 2 2026-05-18
UTA334 UTair Aviation 2 2026-05-04
UTA6577 UTair Aviation 1 2026-05-13
UTA6562 UTair Aviation 1 2026-05-12
UTA6495 - 1 2026-04-13
UTA6490 - 1 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-27 UTA1405 SGC → UFA May 27, 00:10 UTCMay 27, 03:14 UTC3h 5m
2026-05-22 UTA184 KZN → SGC May 22, 21:00 UTCMay 22, 21:50 UTC50m
2026-05-22 UTA183 SGC → KZN May 22, 18:55 UTCMay 22, 19:25 UTC30m
2026-05-22 UTA112 SVX → SGC May 22, 14:35 UTCMay 22, 14:45 UTC10m
2026-05-21 UTA478 KUF → SGC May 21, 08:40 UTCMay 21, 22:45 UTC14h 5m
2026-05-21 UTA478 KUF → SGC May 21, 02:20 UTCMay 21, 22:45 UTC20h 25m
2026-05-20 UTA478 KUF → SGC May 20, 21:50 UTCMay 21, 18:00 UTC20h 10m
2026-05-20 UTA478 KUF → SGC May 20, 18:00 UTCMay 21, 08:45 UTC14h 45m
2026-05-20 UTA478 KUF → SGC May 20, 11:35 UTCMay 21, 08:45 UTC21h 10m
2026-05-20 UTA470B - May 20, 09:35 UTCMay 21, 08:45 UTC23h 10m
2026-05-19 UTA469 SGC → LED May 19, 17:30 UTCMay 20, 07:45 UTC14h 16m
2026-05-18 UTA424 KUF → SGC May 18, 23:45 UTCMay 19, 20:25 UTC20h 40m
2026-05-18 UTA424 KUF → SGC May 18, 20:10 UTCMay 19, 17:35 UTC21h 25m
2026-05-17 UTA419 SGC → KUF May 17, 19:20 UTCMay 18, 10:45 UTC15h 25m
2026-05-15 UTA1152 NJC → UFA May 15, 18:40 UTCMay 16, 12:40 UTC18h 1m
2026-05-15 UTA6578 KGP → UFA May 15, 16:20 UTCMay 16, 12:40 UTC20h 21m
2026-05-15 UTA445 VKO → KGP May 15, 10:35 UTCMay 16, 09:31 UTC22h 55m
2026-05-14 UTA446 KGP → VKO May 14, 11:45 UTCMay 15, 07:15 UTC19h 30m
2026-05-14 UTA446 KGP → VKO May 14, 10:45 UTCMay 15, 07:15 UTC20h 30m
2026-05-13 UTA446 KGP → VKO May 13, 16:15 UTCMay 14, 07:25 UTC15h 10m
2026-05-13 UTA6577 UFA → KGP May 13, 01:00 UTCMay 13, 16:20 UTC15h 20m
2026-05-12 UTA6562 KGP → UFA May 12, 06:35 UTCMay 13, 01:05 UTC18h 30m
2026-05-11 UTA445 VKO → KGP May 11, 11:35 UTCMay 12, 06:40 UTC19h 6m
2026-05-11 UTA445 VKO → KGP May 11, 11:20 UTCMay 12, 06:40 UTC19h 20m
2026-05-11 UTA446 KGP → VKO May 11, 02:35 UTCMay 11, 09:55 UTC7h 20m
2026-05-09 UTA456 NOJ → VKO May 9, 07:30 UTCMay 9, 15:15 UTC7h 45m
2026-05-08 UTA352 HMA → VKO May 8, 18:30 UTCMay 9, 06:05 UTC11h 35m
2026-05-08 UTA596 USK → VKO May 8, 15:10 UTCMay 8, 16:00 UTC50m
2026-05-08 UTA596 USK → VKO May 8, 13:10 UTCMay 8, 14:35 UTC1h 25m
2026-05-08 UTA595 VKO → USK May 8, 09:54 UTCMay 8, 11:49 UTC1h 55m
2026-05-08 UTA352 HMA → VKO May 8, 07:44 UTCMay 8, 08:24 UTC40m
2026-05-08 UTA351 VKO → HMA May 8, 01:29 UTCMay 8, 07:09 UTC5h 40m
2026-05-06 UTA376 SCW → VKO May 6, 18:50 UTCMay 6, 20:30 UTC1h 40m
2026-05-06 UTA375 VKO → SCW May 6, 16:00 UTCMay 6, 17:15 UTC1h 15m
2026-05-06 UTA596 USK → VKO May 6, 11:55 UTCMay 6, 14:30 UTC2h 35m
2026-05-06 UTA595 VKO → USK May 6, 08:30 UTCMay 6, 10:30 UTC2h 0m
2026-05-05 UTA376 SCW → VKO May 5, 21:30 UTCMay 5, 23:05 UTC1h 35m
2026-05-05 UTA375 VKO → SCW May 5, 18:45 UTCMay 5, 20:05 UTC1h 20m
2026-05-05 UTA333 VKO → NNM May 5, 16:40 UTCMay 5, 16:50 UTC10m
2026-05-05 UTA333 VKO → NNM May 5, 11:35 UTCMay 5, 14:45 UTC3h 10m
2026-05-05 UTA333 VKO → NNM May 5, 05:20 UTCMay 5, 07:25 UTC2h 5m
2026-05-04 UTA376 SCW → VKO May 4, 19:10 UTCMay 4, 20:50 UTC1h 40m
2026-05-04 UTA375 VKO → SCW May 4, 16:20 UTCMay 4, 17:45 UTC1h 25m
2026-05-04 UTA334 NNM → VKO May 4, 12:55 UTCMay 4, 14:55 UTC2h 0m
2026-05-04 UTA333 VKO → NNM May 4, 05:35 UTCMay 4, 07:25 UTC1h 50m
2026-05-03 UTA180 UCT → VKO May 3, 16:55 UTCMay 3, 21:44 UTC4h 50m
2026-05-03 UTA334 NNM → VKO May 3, 12:05 UTCMay 3, 14:15 UTC2h 10m
2026-05-03 UTA333 VKO → NNM May 3, 05:35 UTCMay 3, 07:30 UTC1h 55m
2026-05-02 UTA375 VKO → SCW May 2, 20:40 UTCMay 2, 22:15 UTC1h 35m
2026-05-02 UTA375 VKO → SCW May 2, 17:50 UTCMay 2, 19:15 UTC1h 25m

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-73038 page for operator, model, and routing details .

Mode-S 151D4E frequently asked

What is Mode-S code 151D4E?
151D4E is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73038.
Where is Mode-S 151D4E registered?
Mode-S code 151D4E is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D4E broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D4E, octal 05216516, decimal 1,383,758.
What flights does 151D4E operate?
Mode-S 151D4E has broadcast 20 distinct callsigns, including UTA333, UTA596, UTA446, UTA595, UTA478.