Apparatus

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sensors Mode-S transponder

151E51

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73297 · BOEING 737-800

Hex
151E51
Octal
05217121
Decimal
1,384,017
Country
RU
Tail
RA-73297
Type
B738
No current signal · last broadcast Jul 26, 11:30 UTC
Flights observed
150
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 11:30 UTC

Last known position

Most recent position reported by Mode-S 151E51.

Country allocation

The ICAO 24-bit address 151E51 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
PBD859 - 6 2026-07-24
PBD836 - 6 2026-07-21
PBD835 Pobeda 5 2026-07-21
PBD770 - 5 2026-07-17
PBD993 - 4 2026-07-17
PBD979 - 4 2026-07-14
PBD963 - 4 2026-07-09
PBD839 Pobeda 4 2026-07-25
PBD588 - 4 2026-07-03
PBD587 - 4 2026-07-03
PBD571 - 4 2026-06-08
PBD980 - 3 2026-07-14
PBD860 - 3 2026-06-26
PBD840 Pobeda 3 2026-07-20
PBD735 - 3 2026-07-05
PBD591 - 3 2026-07-05
PBD559 - 3 2026-07-22
PBD519 - 3 2026-06-18
PBD517 - 3 2026-06-18
PBD996 Pobeda 2 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PBD954 - Jul 26, 09:45 UTCJul 26, 11:30 UTC1h 45m
2026-07-26 PBD953 PEE → AYT Jul 26, 07:25 UTCJul 26, 08:40 UTC1h 15m
2026-07-25 PBD953 PEE → AYT Jul 25, 10:25 UTCJul 26, 08:40 UTC22h 16m
2026-07-25 PBD839 AYT → AYT Jul 25, 07:40 UTCJul 25, 09:25 UTC1h 45m
2026-07-24 PBD839 AYT → AYT Jul 24, 13:45 UTCJul 25, 09:25 UTC19h 40m
2026-07-24 PBD859 - Jul 24, 11:45 UTCJul 24, 12:30 UTC45m
2026-07-22 PBD559 - Jul 22, 21:20 UTCJul 22, 21:35 UTC15m
2026-07-22 PBD590 - Jul 22, 10:20 UTCJul 22, 13:00 UTC2h 40m
2026-07-21 PBD836 - Jul 21, 09:30 UTCJul 21, 11:10 UTC1h 40m
2026-07-21 PBD835 VKO → VKO Jul 21, 08:15 UTCJul 21, 08:45 UTC30m
2026-07-20 PBD840 AYT → AYT Jul 20, 09:40 UTCJul 21, 08:15 UTC22h 34m
2026-07-20 PBD839 AYT → AYT Jul 20, 07:55 UTCJul 20, 08:40 UTC45m
2026-07-19 PBD839 AYT → AYT Jul 19, 10:50 UTCJul 20, 08:40 UTC21h 50m
2026-07-18 PBD836 - Jul 18, 14:30 UTCJul 19, 09:40 UTC19h 10m
2026-07-18 PBD836 - Jul 18, 13:45 UTCJul 19, 09:40 UTC19h 55m
2026-07-18 PBD835 - Jul 18, 11:40 UTCJul 18, 13:00 UTC1h 20m
2026-07-17 PBD770 - Jul 17, 10:05 UTCJul 17, 10:25 UTC20m
2026-07-17 PBD993 - Jul 17, 08:35 UTCJul 17, 08:45 UTC10m
2026-07-16 PBD535 - Jul 16, 18:50 UTCJul 16, 19:14 UTC25m
2026-07-16 PBD262 - Jul 16, 07:35 UTCJul 16, 09:20 UTC1h 45m
2026-07-15 PBD262 - Jul 15, 10:05 UTCJul 16, 08:15 UTC22h 10m
2026-07-15 PBD993 - Jul 15, 08:15 UTCJul 15, 08:30 UTC15m
2026-07-14 PBD980 - Jul 14, 13:55 UTCJul 14, 15:40 UTC1h 45m
2026-07-14 PBD979 - Jul 14, 12:00 UTCJul 14, 12:40 UTC40m
2026-07-12 PBD980 - Jul 12, 12:20 UTCJul 12, 12:45 UTC25m
2026-07-12 PBD979 - Jul 12, 10:35 UTCJul 12, 11:20 UTC45m
2026-07-11 PBD980 - Jul 11, 11:00 UTCJul 11, 11:25 UTC25m
2026-07-11 PBD979 - Jul 11, 09:15 UTCJul 11, 10:05 UTC50m
2026-07-10 PBD263 - Jul 10, 11:15 UTCJul 10, 18:30 UTC7h 15m
2026-07-09 PBD859 - Jul 9, 14:45 UTCJul 10, 10:05 UTC19h 20m
2026-07-09 PBD963 - Jul 9, 13:00 UTCJul 9, 13:35 UTC35m
2026-07-07 PBD974 IST → IST Jul 7, 14:05 UTCJul 7, 14:35 UTC30m
2026-07-06 PBD515 - Jul 6, 22:10 UTCJul 6, 22:25 UTC15m
2026-07-06 PBD506 - Jul 6, 08:15 UTCJul 6, 08:45 UTC30m
2026-07-05 PBD591 - Jul 5, 20:55 UTCJul 5, 21:05 UTC10m
2026-07-05 PBD736 - Jul 5, 13:45 UTCJul 5, 15:25 UTC1h 40m
2026-07-05 PBD735 - Jul 5, 11:00 UTCJul 5, 12:55 UTC1h 55m
2026-07-04 PBD261 - Jul 4, 17:15 UTCJul 4, 17:45 UTC30m
2026-07-03 PBD588 - Jul 3, 13:35 UTCJul 3, 14:20 UTC45m
2026-07-03 PBD587 - Jul 3, 11:20 UTCJul 3, 12:05 UTC45m
2026-07-03 PBD530 - Jul 3, 08:35 UTCJul 3, 09:30 UTC55m
2026-07-03 PBD529 - Jul 3, 06:35 UTCJul 3, 07:20 UTC45m
2026-07-01 PBD591 - Jul 1, 21:45 UTCJul 1, 21:55 UTC10m
2026-07-01 PBD994 - Jul 1, 14:25 UTCJul 1, 14:55 UTC30m
2026-06-30 PBD770 - Jun 30, 11:00 UTCJun 30, 11:25 UTC25m
2026-06-30 PBD993 - Jun 30, 08:15 UTCJun 30, 08:45 UTC30m
2026-06-29 PBD732 - Jun 29, 06:34 UTCJun 29, 06:50 UTC15m
2026-06-28 PBD964 - Jun 28, 11:04 UTCJun 28, 13:04 UTC2h 0m
2026-06-28 PBD963 - Jun 28, 08:29 UTCJun 28, 09:45 UTC1h 15m
2026-06-27 PBD840 - Jun 27, 10:29 UTCJun 28, 09:45 UTC23h 15m

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-73297 page for operator, model, and routing details .

Mode-S 151E51 frequently asked

What is Mode-S code 151E51?
151E51 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73297.
Where is Mode-S 151E51 registered?
Mode-S code 151E51 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151E51 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151E51, octal 05217121, decimal 1,384,017.
What flights does 151E51 operate?
Mode-S 151E51 has broadcast 20 distinct callsigns, including PBD859, PBD836, PBD835, PBD770, PBD993.