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sensors Mode-S transponder

151E21

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73249 · BOEING 737-800

Hex
151E21
Octal
05217041
Decimal
1,383,969
Country
RU
Tail
RA-73249
Type
B738
No current signal · last broadcast Jul 26, 06:10 UTC
Flights observed
141
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 06:10 UTC

Last known position

Most recent position reported by Mode-S 151E21.

Country allocation

The ICAO 24-bit address 151E21 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
PBD835 Pobeda 8 2026-06-12
PBD836 - 6 2026-06-12
PBD964 - 5 2026-07-17
PBD963 - 5 2026-07-16
PBD6838 Pobeda 4 2026-05-03
PBD995 Pobeda 3 2026-05-31
PBD993 - 3 2026-06-13
PBD973 Pobeda 3 2026-06-04
PBD859 - 3 2026-06-30
PBD6837 - 3 2026-05-03
PBD6831 Pobeda 3 2026-06-02
PBD980 - 2 2026-07-18
PBD979 - 2 2026-07-18
PBD977 - 2 2026-07-25
PBD894 - 2 2026-07-20
PBD862 - 2 2026-07-21
PBD840 - 2 2026-07-10
PBD770 - 2 2026-06-13
PBD730 - 2 2026-06-11
PBD6939 - 2 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 PBD5921 SVO → MCX Jul 26, 05:50 UTCJul 26, 06:10 UTC20m
2026-07-26 PBD6970 - Jul 26, 03:05 UTCJul 26, 03:40 UTC35m
2026-07-25 PBD6569 SVO → SVO Jul 25, 23:30 UTCJul 25, 23:45 UTC15m
2026-07-25 PBD978 - Jul 25, 15:10 UTCJul 25, 15:40 UTC30m
2026-07-25 PBD977 - Jul 25, 13:30 UTCJul 25, 13:50 UTC20m
2026-07-25 PBD977 - Jul 25, 11:50 UTCJul 25, 12:45 UTC55m
2026-07-23 PBD6872 - Jul 23, 13:10 UTCJul 23, 14:50 UTC1h 40m
2026-07-22 PBD6925 - Jul 22, 16:30 UTCJul 22, 16:40 UTC10m
2026-07-21 PBD862 - Jul 21, 13:25 UTCJul 21, 23:10 UTC9h 45m
2026-07-20 PBD894 - Jul 20, 18:00 UTCJul 21, 12:10 UTC18h 9m
2026-07-20 PBD525 - Jul 20, 11:05 UTCJul 20, 11:15 UTC10m
2026-07-19 PBD366 - Jul 19, 01:25 UTCJul 19, 12:05 UTC10h 40m
2026-07-18 PBD980 - Jul 18, 11:45 UTCJul 19, 01:35 UTC13h 50m
2026-07-18 PBD979 - Jul 18, 09:55 UTCJul 18, 10:30 UTC35m
2026-07-17 PBD964 - Jul 17, 21:50 UTCJul 17, 22:15 UTC25m
2026-07-17 PBD964 - Jul 17, 17:50 UTCJul 17, 18:25 UTC35m
2026-07-16 PBD963 - Jul 16, 22:30 UTCJul 17, 16:34 UTC18h 5m
2026-07-16 PBD963 - Jul 16, 18:19 UTCJul 17, 16:34 UTC22h 15m
2026-07-16 PBD894 - Jul 16, 17:25 UTCJul 16, 22:35 UTC5h 10m
2026-07-15 PBD525 LED → LED Jul 15, 11:45 UTCJul 15, 12:10 UTC25m
2026-07-15 PBD530 - Jul 15, 09:55 UTCJul 15, 10:55 UTC1h 0m
2026-07-15 PBD529 - Jul 15, 07:45 UTCJul 15, 08:30 UTC45m
2026-07-14 PBD964 - Jul 14, 18:25 UTCJul 14, 18:55 UTC30m
2026-07-14 PBD964 - Jul 14, 14:20 UTCJul 14, 16:15 UTC1h 55m
2026-07-14 PBD963 - Jul 14, 11:10 UTCJul 14, 13:15 UTC2h 5m
2026-07-11 PBD261 - Jul 11, 18:05 UTCJul 11, 18:35 UTC30m
2026-07-10 PBD840 - Jul 10, 09:55 UTCJul 10, 10:15 UTC20m
2026-07-10 PBD839 - Jul 10, 08:25 UTCJul 10, 08:50 UTC25m
2026-07-06 PBD590 - Jul 6, 12:10 UTCJul 6, 13:10 UTC1h 0m
2026-07-05 PBD330 GSV → GSV Jul 5, 19:25 UTCJul 5, 19:30 UTC5m
2026-07-03 PBD330 - Jul 3, 19:45 UTCJul 3, 19:55 UTC10m
2026-07-01 PBD860 - Jul 1, 12:15 UTCJul 1, 14:00 UTC1h 45m
2026-06-30 PBD859 - Jun 30, 16:25 UTCJul 1, 11:05 UTC18h 40m
2026-06-30 PBD859 - Jun 30, 15:05 UTCJul 1, 11:05 UTC20h 0m
2026-06-30 PBD859 - Jun 30, 13:10 UTCJun 30, 14:00 UTC50m
2026-06-27 PBD535 - Jun 27, 18:09 UTCJun 27, 18:45 UTC35m
2026-06-26 PBD736 - Jun 26, 12:05 UTCJun 26, 13:40 UTC1h 35m
2026-06-26 PBD735 - Jun 26, 09:14 UTCJun 26, 09:59 UTC45m
2026-06-25 PBD505 - Jun 25, 11:50 UTCJun 25, 11:59 UTC10m
2026-06-23 PBD340 - Jun 23, 05:24 UTCJun 23, 06:29 UTC1h 5m
2026-06-21 PBD957 - Jun 21, 12:14 UTCJun 21, 12:40 UTC25m
2026-06-21 PBD6841 SVO → SVO Jun 21, 05:30 UTCJun 21, 05:49 UTC20m
2026-06-18 PBD6833 SVO → SVO Jun 18, 18:05 UTCJun 18, 19:05 UTC1h 0m
2026-06-17 PBD942 IST → IST Jun 17, 19:15 UTCJun 18, 18:15 UTC23h 0m
2026-06-17 PBD941 IST → IST Jun 17, 17:25 UTCJun 17, 17:50 UTC25m
2026-06-15 PBD980 - Jun 15, 10:30 UTCJun 15, 12:25 UTC1h 55m
2026-06-15 PBD979 - Jun 15, 08:54 UTCJun 15, 09:25 UTC30m
2026-06-14 PBD964 - Jun 14, 11:00 UTCJun 15, 09:25 UTC22h 25m
2026-06-14 PBD963 - Jun 14, 08:45 UTCJun 14, 09:20 UTC35m
2026-06-13 PBD963 - Jun 13, 10:20 UTCJun 14, 09:20 UTC23h 0m

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-73249 page for operator, model, and routing details .

Mode-S 151E21 frequently asked

What is Mode-S code 151E21?
151E21 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73249.
Where is Mode-S 151E21 registered?
Mode-S code 151E21 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151E21 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 06:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151E21, octal 05217041, decimal 1,383,969.
What flights does 151E21 operate?
Mode-S 151E21 has broadcast 20 distinct callsigns, including PBD835, PBD836, PBD964, PBD963, PBD6838.