Apparatus

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sensors Mode-S transponder

151D57

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73047 · BOEING 737-500

Hex
151D57
Octal
05216527
Decimal
1,383,767
Country
RU
Tail
RA-73047
Type
B735
No current signal · last broadcast 21h ago
Flights observed
108
Distinct callsigns
20
Country
RU
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 151D57.

Country allocation

The ICAO 24-bit address 151D57 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 - 10 2026-07-08
UTA445 - 7 2026-07-08
UTA744 UTair Aviation 5 2026-04-27
UTA743 UTair Aviation 5 2026-04-27
UTA6125 - 5 2026-07-09
UTA376 UTair Aviation 5 2026-04-28
UTA375 UTair Aviation 5 2026-04-28
UTA371 - 5 2026-07-16
UTA824 UTair Aviation 3 2026-06-10
UTA6474 UTair Aviation 3 2026-07-16
UTA596 - 3 2026-04-18
UTA595 UTair Aviation 3 2026-04-18
UTA574 UTair Aviation 3 2026-04-19
UTA573 UTair Aviation 3 2026-04-18
UTA364 UTair Aviation 3 2026-04-20
UTA749 UTair Aviation 2 2026-06-07
UTA6316 - 2 2026-04-17
UTA6315 - 2 2026-04-17
UTA6126 - 2 2026-07-10
UTA398 UTair Aviation 2 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 UTA6473 TLK → SGC Jul 17, 09:55 UTCJul 17, 10:35 UTC40m
2026-07-16 UTA6474 TLK → OVB Jul 16, 12:09 UTCJul 17, 07:44 UTC19h 35m
2026-07-16 UTA372 - Jul 16, 10:50 UTCJul 17, 07:44 UTC20h 55m
2026-07-16 UTA372 - Jul 16, 07:50 UTCJul 17, 07:44 UTC23h 55m
2026-07-16 UTA371 - Jul 16, 06:35 UTCJul 16, 12:09 UTC5h 35m
2026-07-13 UTA421 - Jul 13, 20:00 UTCJul 14, 03:50 UTC7h 50m
2026-07-11 UTA417 - Jul 11, 11:25 UTCJul 12, 01:50 UTC14h 25m
2026-07-10 UTA1151 NJC → UFA Jul 10, 19:50 UTCJul 11, 11:25 UTC15h 35m
2026-07-10 UTA6126 - Jul 10, 14:15 UTCJul 11, 11:25 UTC21h 10m
2026-07-09 UTA6125 - Jul 9, 12:30 UTCJul 10, 05:30 UTC17h 0m
2026-07-08 UTA6578 - Jul 8, 18:35 UTCJul 9, 16:35 UTC22h 0m
2026-07-08 UTA445 - Jul 8, 13:05 UTCJul 8, 18:40 UTC5h 35m
2026-07-08 UTA446 - Jul 8, 07:05 UTCJul 8, 07:30 UTC25m
2026-07-07 UTA446 - Jul 7, 16:20 UTCJul 8, 06:20 UTC14h 0m
2026-07-07 UTA6577 - Jul 7, 01:30 UTCJul 7, 16:25 UTC14h 55m
2026-07-06 UTA445 - Jul 6, 10:25 UTCJul 7, 01:35 UTC15h 10m
2026-07-06 UTA446 - Jul 6, 07:00 UTCJul 6, 07:25 UTC25m
2026-07-05 UTA446 - Jul 5, 11:50 UTCJul 6, 06:30 UTC18h 40m
2026-07-05 UTA445 - Jul 5, 10:35 UTCJul 6, 06:30 UTC19h 55m
2026-07-04 UTA446 - Jul 4, 12:35 UTCJul 5, 07:30 UTC18h 55m
2026-07-03 UTA151 UFA → NJC Jul 3, 17:00 UTCJul 4, 12:40 UTC19h 40m
2026-07-02 UTA6491 - Jul 2, 21:55 UTCJul 3, 17:00 UTC19h 5m
2026-07-02 UTA6424 - Jul 2, 20:25 UTCJul 3, 17:00 UTC20h 35m
2026-07-02 UTA6423 SGC → GSV Jul 2, 08:45 UTCJul 2, 19:10 UTC10h 25m
2026-07-01 UTA6562 KGP → UFA Jul 1, 16:20 UTCJul 2, 08:45 UTC16h 25m
2026-07-01 UTA445 - Jul 1, 11:50 UTCJul 2, 08:45 UTC20h 55m
2026-07-01 UTA445 - Jul 1, 10:40 UTCJul 2, 08:45 UTC22h 5m
2026-07-01 UTA446 - Jul 1, 01:05 UTCJul 1, 07:20 UTC6h 15m
2026-06-29 UTA445 - Jun 29, 10:44 UTCJun 29, 10:59 UTC15m
2026-06-28 UTA446 - Jun 28, 16:29 UTCJun 29, 07:20 UTC14h 50m
2026-06-28 UTA446 - Jun 28, 08:34 UTCJun 29, 07:20 UTC22h 45m
2026-06-27 UTA493 UFA → GDZ Jun 27, 12:34 UTCJun 28, 06:49 UTC18h 15m
2026-06-26 UTA6125 - Jun 26, 15:25 UTCJun 26, 16:00 UTC35m
2026-06-25 UTA6125 - Jun 25, 16:20 UTCJun 26, 05:30 UTC13h 10m
2026-06-24 UTA445 - Jun 24, 10:49 UTCJun 24, 11:09 UTC20m
2026-06-23 UTA446 - Jun 23, 13:15 UTCJun 24, 07:20 UTC18h 5m
2026-06-23 UTA446 - Jun 23, 08:20 UTCJun 24, 07:20 UTC23h 0m
2026-06-23 UTA103 - Jun 23, 04:25 UTCJun 24, 01:14 UTC20h 50m
2026-06-22 UTA371 DME → MRV Jun 22, 18:15 UTCJun 23, 13:19 UTC19h 5m
2026-06-22 UTA371 DME → MRV Jun 22, 09:49 UTCJun 23, 08:25 UTC22h 35m
2026-06-22 UTA6494 - Jun 22, 06:35 UTCJun 23, 04:29 UTC21h 55m
2026-06-21 UTA6433 - Jun 21, 18:14 UTCJun 22, 05:24 UTC11h 10m
2026-06-11 UTA371 DME → MRV Jun 11, 05:05 UTCJun 11, 23:10 UTC18h 5m
2026-06-11 UTA371 DME → MRV Jun 11, 02:10 UTCJun 11, 23:10 UTC21h 0m
2026-06-10 UTA824 GYD → SGC Jun 10, 13:55 UTCJun 11, 05:05 UTC15h 10m
2026-06-10 UTA824 GYD → SGC Jun 10, 08:35 UTCJun 11, 05:05 UTC20h 30m
2026-06-10 UTA824 GYD → SGC Jun 10, 05:50 UTCJun 11, 05:05 UTC23h 15m
2026-06-07 UTA749 TJM → GYD Jun 7, 02:30 UTCJun 7, 21:10 UTC18h 40m
2026-06-06 UTA749 TJM → GYD Jun 6, 06:30 UTCJun 7, 03:10 UTC20h 40m
2026-06-05 UTA6426 NNM → UFA Jun 5, 23:00 UTCJun 6, 06:35 UTC7h 35m

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-73047 page for operator, model, and routing details .

Mode-S 151D57 frequently asked

What is Mode-S code 151D57?
151D57 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73047.
Where is Mode-S 151D57 registered?
Mode-S code 151D57 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D57 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D57, octal 05216527, decimal 1,383,767.
What flights does 151D57 operate?
Mode-S 151D57 has broadcast 20 distinct callsigns, including UTA446, UTA445, UTA744, UTA743, UTA6125.