Apparatus

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sensors Mode-S transponder

151D6C

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73068 · BOEING 737-400

Hex
151D6C
Octal
05216554
Decimal
1,383,788
Country
RU
Tail
RA-73068
Type
B734
No current signal · last broadcast 54m ago
Flights observed
127
Distinct callsigns
20
Country
RU
Last broadcast
54m ago

Last known position

Most recent position reported by Mode-S 151D6C.

Country allocation

The ICAO 24-bit address 151D6C 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
UTA576 - 8 2026-07-04
UTA575 - 7 2026-07-04
UTA399 UTair Aviation 6 2026-07-04
UTA397 - 6 2026-07-01
UTA185 UTair Aviation 6 2026-06-01
UTA744 UTair Aviation 4 2026-06-16
UTA743 - 4 2026-06-16
UTA492 UTair Aviation 4 2026-06-10
UTA491 UTair Aviation 4 2026-06-10
UTA398 - 4 2026-07-01
UTA375 UTair Aviation 4 2026-06-16
UTA373 - 4 2026-07-02
UTA356 UTair Aviation 4 2026-06-26
UTA250 UTair Aviation 4 2026-06-23
UTA400 UTair Aviation 3 2026-06-12
UTA374 - 3 2026-07-02
UTA249 UTair Aviation 3 2026-06-23
UTA151 UTair Aviation 3 2026-05-23
UTA6701 - 2 2026-05-23
UTA559F - 2 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-04 UTA399 VKO → GRV Jul 4, 17:55 UTCJul 5, 04:55 UTC11h 0m
2026-07-04 UTA576 - Jul 4, 12:40 UTCJul 4, 15:25 UTC2h 45m
2026-07-04 UTA575 - Jul 4, 07:20 UTCJul 4, 10:55 UTC3h 35m
2026-07-04 UTA559F - Jul 4, 00:35 UTCJul 4, 00:55 UTC20m
2026-07-03 UTA559F - Jul 3, 22:25 UTCJul 3, 23:45 UTC1h 20m
2026-07-03 UTA576 - Jul 3, 12:45 UTCJul 3, 15:50 UTC3h 5m
2026-07-03 UTA575 - Jul 3, 07:10 UTCJul 3, 10:10 UTC3h 0m
2026-07-02 UTA399 VKO → GRV Jul 2, 22:40 UTCJul 3, 05:05 UTC6h 25m
2026-07-02 UTA374 - Jul 2, 20:15 UTCJul 2, 20:55 UTC40m
2026-07-02 UTA373 - Jul 2, 16:15 UTCJul 2, 16:25 UTC10m
2026-07-02 UTA373 - Jul 2, 13:50 UTCJul 2, 14:30 UTC40m
2026-07-01 UTA399 VKO → GRV Jul 1, 22:35 UTCJul 2, 11:40 UTC13h 5m
2026-07-01 UTA398 - Jul 1, 12:50 UTCJul 1, 15:50 UTC3h 0m
2026-07-01 UTA397 - Jul 1, 07:40 UTCJul 1, 10:50 UTC3h 10m
2026-06-30 UTA398 - Jun 30, 14:35 UTCJun 30, 17:30 UTC2h 55m
2026-06-30 UTA397 - Jun 30, 09:10 UTCJun 30, 12:10 UTC3h 0m
2026-06-30 UTA399 VKO → GRV Jun 30, 00:00 UTCJun 30, 07:35 UTC7h 36m
2026-06-29 UTA576 - Jun 29, 18:49 UTCJun 29, 22:05 UTC3h 15m
2026-06-29 UTA575 - Jun 29, 10:44 UTCJun 29, 14:19 UTC3h 35m
2026-06-29 UTA355G - Jun 29, 01:14 UTCJun 29, 09:14 UTC8h 0m
2026-06-28 UTA358 - Jun 28, 21:55 UTCJun 28, 23:20 UTC1h 25m
2026-06-28 UTA357 - Jun 28, 19:04 UTCJun 28, 20:09 UTC1h 5m
2026-06-28 UTA398 - Jun 28, 14:09 UTCJun 28, 17:04 UTC2h 55m
2026-06-28 UTA397 - Jun 28, 07:44 UTCJun 28, 10:44 UTC3h 0m
2026-06-27 UTA559 VKO → MCX Jun 27, 23:00 UTCJun 28, 05:55 UTC6h 55m
2026-06-27 UTA576 - Jun 27, 19:55 UTCJun 27, 20:09 UTC15m
2026-06-27 UTA - Jun 27, 16:39 UTCJun 27, 18:49 UTC2h 10m
2026-06-27 UTA397 - Jun 27, 07:30 UTCJun 27, 10:54 UTC3h 25m
2026-06-26 UTA576 - Jun 26, 19:55 UTCJun 26, 23:00 UTC3h 5m
2026-06-26 UTA575 - Jun 26, 09:05 UTCJun 26, 12:19 UTC3h 15m
2026-06-26 UTA356 GRV → VKO Jun 26, 06:45 UTCJun 26, 07:10 UTC25m
2026-06-25 UTA399 VKO → GRV Jun 25, 23:14 UTCJun 26, 05:50 UTC6h 35m
2026-06-25 UTA576 - Jun 25, 18:24 UTCJun 25, 21:25 UTC3h 0m
2026-06-25 UTA575 - Jun 25, 12:50 UTCJun 25, 16:29 UTC3h 40m
2026-06-25 UTA398F - Jun 25, 07:45 UTCJun 25, 10:35 UTC2h 50m
2026-06-24 UTA397 - Jun 24, 10:30 UTCJun 24, 13:44 UTC3h 15m
2026-06-23 UTA250 AER → VKO Jun 23, 20:44 UTCJun 24, 00:30 UTC3h 45m
2026-06-23 UTA249 VKO → AER Jun 23, 15:34 UTCJun 23, 18:29 UTC2h 55m
2026-06-21 UTA398 GDZ → VKO Jun 21, 12:49 UTCJun 21, 15:40 UTC2h 50m
2026-06-21 UTA397 - Jun 21, 07:49 UTCJun 21, 11:05 UTC3h 15m
2026-06-20 UTA364 - Jun 20, 23:10 UTCJun 21, 05:44 UTC6h 35m
2026-06-20 UTA358 - Jun 20, 19:55 UTCJun 20, 21:14 UTC1h 20m
2026-06-20 UTA357 - Jun 20, 17:10 UTCJun 20, 18:14 UTC1h 5m
2026-06-20 UTA576 - Jun 20, 12:34 UTCJun 20, 15:39 UTC3h 5m
2026-06-20 UTA575 VKO → KRR Jun 20, 07:29 UTCJun 20, 10:25 UTC2h 55m
2026-06-19 UTA399 VKO → GRV Jun 19, 20:09 UTCJun 20, 05:44 UTC9h 35m
2026-06-19 UTA356 GRV → VKO Jun 19, 16:25 UTCJun 19, 17:34 UTC1h 10m
2026-06-19 UTA399B - Jun 19, 03:15 UTCJun 19, 10:39 UTC7h 25m
2026-06-18 UTA374 - Jun 18, 20:35 UTCJun 18, 23:55 UTC3h 20m
2026-06-18 UTA373 VKO → MRV Jun 18, 16:00 UTCJun 18, 18:40 UTC2h 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-73068 page for operator, model, and routing details .

Mode-S 151D6C frequently asked

What is Mode-S code 151D6C?
151D6C is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73068.
Where is Mode-S 151D6C registered?
Mode-S code 151D6C is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D6C broadcasting right now?
No active broadcast right now. Last signal was 54m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D6C, octal 05216554, decimal 1,383,788.
What flights does 151D6C operate?
Mode-S 151D6C has broadcast 20 distinct callsigns, including UTA576, UTA575, UTA399, UTA397, UTA185.