sensors Mode-S transponder

151D55

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73045 · BOEING 737-500

Hex
151D55
Octal
05216525
Decimal
1,383,765
Country
RU
Tail
RA-73045
Type
B735
No current signal · last broadcast 1d ago
Flights observed
67
Distinct callsigns
20
Country
RU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 151D55.

Country allocation

The ICAO 24-bit address 151D55 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
UTA750 - 6 2026-07-12
UTA282 UTair Aviation 4 2026-06-08
UTA183 UTair Aviation 4 2026-05-30
UTA414 UTair Aviation 3 2026-05-28
UTA413 - 3 2026-06-25
UTA1403 UTair Aviation 3 2026-06-26
UTA6490 - 2 2026-07-06
UTA6422 UTair Aviation 2 2026-06-03
UTA478 UTair Aviation 2 2026-04-28
UTA418 UTair Aviation 2 2026-04-19
UTA372 - 2 2026-07-02
UTA111 - 2 2026-06-14
UTA6494 UTair Aviation 1 2026-04-27
UTA6489 UTair Aviation 1 2026-04-24
UTA6474 - 1 2026-04-24
UTA6473 UTair Aviation 1 2026-04-24
UTA6436 UTair Aviation 1 2026-04-27
UTA6433 UTair Aviation 1 2026-04-26
UTA6429 UTair Aviation 1 2026-07-06
UTA6424 UTair Aviation 1 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 UTA750 - Jul 12, 15:30 UTCJul 12, 22:30 UTC7h 0m
2026-07-06 UTA6490 - Jul 6, 17:15 UTCJul 6, 18:45 UTC1h 30m
2026-07-06 UTA6429 SGC → GSV Jul 6, 15:25 UTCJul 6, 16:05 UTC40m
2026-07-02 UTA372 - Jul 2, 06:35 UTCJul 2, 12:25 UTC5h 50m
2026-07-01 UTA372 - Jul 1, 14:55 UTCJul 2, 12:25 UTC21h 30m
2026-07-01 UTA750 GYD → TJM Jul 1, 10:15 UTCJul 1, 10:40 UTC25m
2026-06-26 UTA1403 SGC → UFA Jun 26, 06:25 UTCJun 26, 20:50 UTC14h 25m
2026-06-25 UTA1403 SGC → UFA Jun 25, 22:54 UTCJun 26, 20:50 UTC21h 55m
2026-06-25 UTA1403 SGC → UFA Jun 25, 19:20 UTCJun 26, 17:15 UTC21h 55m
2026-06-25 UTA413 - Jun 25, 11:39 UTCJun 26, 08:54 UTC21h 15m
2026-06-25 UTA1427 SGC → UFA Jun 25, 02:10 UTCJun 25, 19:20 UTC17h 10m
2026-06-24 UTA750 GYD → TJM Jun 24, 11:05 UTCJun 25, 02:14 UTC15h 10m
2026-06-23 UTA750 GYD → TJM Jun 23, 20:34 UTCJun 24, 12:44 UTC16h 10m
2026-06-23 UTA750 GYD → TJM Jun 23, 16:54 UTCJun 24, 12:44 UTC19h 50m
2026-06-23 UTA750 GYD → TJM Jun 23, 11:45 UTCJun 24, 11:14 UTC23h 30m
2026-06-21 UTA408 UFA → SGC Jun 21, 21:44 UTCJun 22, 00:24 UTC2h 40m
2026-06-19 UTA403 SGC → UFA Jun 19, 08:44 UTCJun 19, 18:30 UTC9h 45m
2026-06-17 UTA434 - Jun 17, 18:50 UTCJun 18, 08:00 UTC13h 10m
2026-06-17 UTA433 TJM → KRR Jun 17, 03:45 UTCJun 17, 16:35 UTC12h 50m
2026-06-15 UTA421 - Jun 15, 19:55 UTCJun 16, 00:35 UTC4h 40m
2026-06-14 UTA111 - Jun 14, 03:25 UTCJun 14, 03:45 UTC20m
2026-06-08 UTA282 KUF → SVX Jun 8, 17:45 UTCJun 8, 18:05 UTC20m
2026-06-07 UTA282 KUF → SVX Jun 7, 07:55 UTCJun 7, 10:40 UTC2h 45m
2026-06-06 UTA282 KUF → SVX Jun 6, 10:20 UTCJun 6, 10:39 UTC20m
2026-06-04 UTA6424 GSV → SGC Jun 4, 19:50 UTCJun 5, 08:30 UTC12h 40m
2026-06-04 UTA6423 SGC → GSV Jun 4, 16:15 UTCJun 4, 17:45 UTC1h 30m
2026-06-03 UTA6422 SGC → IJK Jun 3, 17:30 UTCJun 4, 17:15 UTC23h 45m
2026-06-03 UTA6422 SGC → IJK Jun 3, 14:00 UTCJun 3, 18:15 UTC4h 15m
2026-05-31 UTA184 KZN → SGC May 31, 21:00 UTCJun 1, 10:25 UTC13h 25m
2026-05-30 UTA183 SGC → KZN May 30, 23:20 UTCMay 31, 18:50 UTC19h 30m
2026-05-30 UTA183 SGC → KZN May 30, 22:30 UTCMay 31, 18:50 UTC20h 20m
2026-05-29 UTA195 SVX → NUX May 29, 06:05 UTCMay 29, 06:15 UTC10m
2026-05-28 UTA414 KUF → SGC May 28, 19:10 UTCMay 28, 23:05 UTC3h 55m
2026-05-22 UTA6303 - May 22, 21:05 UTCMay 22, 22:55 UTC1h 50m
2026-05-22 UTA6302 - May 22, 16:45 UTCMay 22, 18:50 UTC2h 5m
2026-05-18 UTA1453 VKO → TJM May 18, 20:20 UTCMay 18, 22:25 UTC2h 5m
2026-05-18 UTA6316 - May 18, 04:51 UTCMay 18, 19:05 UTC14h 14m
2026-05-17 UTA1464 TJM → VKO May 17, 16:01 UTCMay 17, 18:25 UTC2h 25m
2026-05-06 UTA453 VKO → TJM May 6, 17:50 UTCMay 6, 19:45 UTC1h 55m
2026-05-06 UTA334 NNM → VKO May 6, 10:10 UTCMay 6, 12:25 UTC2h 15m
2026-05-06 UTA333 VKO → NNM May 6, 06:35 UTCMay 6, 08:20 UTC1h 45m
2026-05-06 UTA454 TJM → VKO May 6, 02:50 UTCMay 6, 05:10 UTC2h 20m
2026-04-30 UTA414 KUF → SGC Apr 30, 22:20 UTCMay 1, 16:50 UTC18h 30m
2026-04-30 UTA413 SGC → KUF Apr 30, 20:05 UTCMay 1, 16:50 UTC20h 45m
2026-04-29 UTA282 KUF → SVX Apr 29, 12:40 UTCApr 29, 14:45 UTC2h 5m
2026-04-28 UTA478 KUF → SGC Apr 28, 18:20 UTCApr 28, 22:35 UTC4h 15m
2026-04-27 UTA6436 KZN → SGC Apr 27, 08:05 UTCApr 27, 09:00 UTC55m
2026-04-27 UTA6494 GSV → KZN Apr 27, 05:25 UTCApr 27, 05:50 UTC25m
2026-04-26 UTA6433 SGC → GSV Apr 26, 20:50 UTCApr 27, 04:15 UTC7h 25m
2026-04-26 UTA183 SGC → KZN Apr 26, 18:30 UTCApr 26, 19:00 UTC30m

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-73045 page for operator, model, and routing details .

Mode-S 151D55 frequently asked

What is Mode-S code 151D55?
151D55 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73045.
Where is Mode-S 151D55 registered?
Mode-S code 151D55 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D55 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D55, octal 05216525, decimal 1,383,765.
What flights does 151D55 operate?
Mode-S 151D55 has broadcast 20 distinct callsigns, including UTA750, UTA282, UTA183, UTA414, UTA413.