Apparatus

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sensors Mode-S transponder

151DE3

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73187 · BOEING 737-800

Hex
151DE3
Octal
05216743
Decimal
1,383,907
Country
RU
Tail
RA-73187
Type
B738
No current signal · last broadcast Jul 26, 21:25 UTC
Flights observed
119
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 21:25 UTC

Last known position

Most recent position reported by Mode-S 151DE3.

Country allocation

The ICAO 24-bit address 151DE3 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
SDM6875 - 31 2026-07-18
SDM6876 Rossiya - Russian Airlines 30 2026-07-20
SDM6725 - 6 2026-07-09
SDM6792 Rossiya - Russian Airlines 5 2026-07-25
SDM6791 Rossiya - Russian Airlines 5 2026-07-24
SDM6622 Rossiya - Russian Airlines 4 2026-05-03
SDM6825 Rossiya - Russian Airlines 3 2026-07-07
SDM6784 Rossiya - Russian Airlines 3 2026-05-31
SDM6621 Rossiya - Russian Airlines 3 2026-04-24
SDM6476 Rossiya - Russian Airlines 3 2026-07-22
SDM6924 Rossiya - Russian Airlines 2 2026-05-28
SDM6896 Rossiya - Russian Airlines 2 2026-05-31
SDM6895 Rossiya - Russian Airlines 2 2026-05-02
SDM6796 Rossiya - Russian Airlines 2 2026-07-23
SDM6726 - 2 2026-07-12
SDM6623 Rossiya - Russian Airlines 2 2026-06-27
SDM6572 Rossiya - Russian Airlines 2 2026-05-25
SDM6988 Rossiya - Russian Airlines 1 2026-04-28
SDM6987 Rossiya - Russian Airlines 1 2026-04-21
SDM6985 Rossiya - Russian Airlines 1 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SDM6783 KJA → OSS Jul 26, 01:10 UTCJul 26, 21:25 UTC20h 16m
2026-07-25 SDM6792 SVX → KJA Jul 25, 02:55 UTCJul 26, 01:45 UTC22h 50m
2026-07-24 SDM6791 KJA → SVX Jul 24, 21:10 UTCJul 25, 03:25 UTC6h 15m
2026-07-23 SDM6796 FRU → KJA Jul 23, 04:40 UTCJul 23, 22:25 UTC17h 45m
2026-07-23 SDM6796 FRU → KJA Jul 23, 02:10 UTCJul 23, 22:25 UTC20h 15m
2026-07-22 SDM6476 KJA → LED Jul 22, 15:00 UTCJul 23, 12:50 UTC21h 50m
2026-07-20 SDM6876 AER → KJA Jul 20, 10:00 UTCJul 20, 22:05 UTC12h 5m
2026-07-19 SDM6876 AER → KJA Jul 19, 20:25 UTCJul 20, 10:35 UTC14h 10m
2026-07-19 SDM6876 AER → KJA Jul 19, 10:00 UTCJul 19, 21:35 UTC11h 35m
2026-07-18 SDM6875 - Jul 18, 22:40 UTCJul 19, 20:40 UTC22h 0m
2026-07-18 SDM6875 - Jul 18, 19:40 UTCJul 19, 10:35 UTC14h 55m
2026-07-17 SDM6876 - Jul 17, 22:05 UTCJul 18, 19:40 UTC21h 36m
2026-07-17 SDM6875 - Jul 17, 11:00 UTCJul 17, 22:45 UTC11h 45m
2026-07-13 SDM6637 - Jul 13, 21:30 UTCJul 14, 14:30 UTC17h 0m
2026-07-12 SDM6726 - Jul 12, 15:01 UTCJul 12, 22:15 UTC7h 15m
2026-07-11 SDM6791 - Jul 11, 05:55 UTCJul 11, 12:00 UTC6h 5m
2026-07-10 SDM6875 - Jul 10, 11:05 UTCJul 11, 03:55 UTC16h 50m
2026-07-09 SDM6725 - Jul 9, 21:40 UTCJul 9, 22:10 UTC30m
2026-07-08 SDM6826 - Jul 8, 13:25 UTCJul 8, 23:15 UTC9h 50m
2026-07-07 SDM6825 KJA → MCX Jul 7, 14:50 UTCJul 8, 14:05 UTC23h 15m
2026-07-06 SDM6795 - Jul 6, 23:10 UTCJul 7, 15:05 UTC15h 55m
2026-07-05 SDM6876 - Jul 5, 09:50 UTCJul 5, 22:05 UTC12h 15m
2026-07-03 SDM6876 - Jul 3, 11:05 UTCJul 3, 23:20 UTC12h 15m
2026-07-02 SDM6476 - Jul 2, 02:15 UTCJul 2, 20:15 UTC18h 0m
2026-06-30 SDM6876 - Jun 30, 10:10 UTCJun 30, 21:40 UTC11h 30m
2026-06-28 SDM6725 - Jun 28, 16:00 UTCJun 28, 23:34 UTC7h 35m
2026-06-27 SDM6623 KJA → SYX Jun 27, 19:19 UTCJun 27, 19:39 UTC20m
2026-06-25 SDM6876 - Jun 25, 10:04 UTCJun 25, 21:59 UTC11h 55m
2026-06-25 SDM6876 - Jun 25, 00:49 UTCJun 25, 21:59 UTC21h 10m
2026-06-25 SDM6876 - Jun 25, 00:29 UTCJun 25, 21:59 UTC21h 30m
2026-06-24 SDM6875 - Jun 24, 13:50 UTCJun 25, 10:45 UTC20h 55m
2026-06-24 SDM6875 - Jun 24, 10:49 UTCJun 25, 10:45 UTC23h 55m
2026-06-24 SDM6875 - Jun 24, 10:10 UTCJun 25, 01:14 UTC15h 5m
2026-06-22 SDM6876 - Jun 22, 01:49 UTCJun 22, 10:40 UTC8h 50m
2026-06-21 SDM6876 - Jun 21, 09:59 UTCJun 22, 02:59 UTC17h 0m
2026-06-20 SDM6875 - Jun 20, 22:20 UTCJun 21, 10:40 UTC12h 20m
2026-06-20 SDM6876 - Jun 20, 11:09 UTCJun 20, 19:55 UTC8h 45m
2026-06-18 SDM6875 - Jun 18, 22:15 UTCJun 19, 11:45 UTC13h 29m
2026-06-18 SDM6876 - Jun 18, 04:55 UTCJun 18, 19:55 UTC15h 0m
2026-06-17 SDM6876 - Jun 17, 18:00 UTCJun 18, 06:05 UTC12h 5m
2026-06-17 SDM6876 - Jun 17, 06:50 UTCJun 18, 06:05 UTC23h 15m
2026-06-17 SDM6876 AER → KJA Jun 17, 05:50 UTCJun 17, 18:45 UTC12h 55m
2026-06-16 SDM6876 AER → KJA Jun 16, 09:55 UTCJun 17, 06:55 UTC21h 1m
2026-06-15 SDM6875 KJA → AER Jun 15, 21:35 UTCJun 16, 10:35 UTC13h 0m
2026-06-14 SDM6725 - Jun 14, 05:55 UTCJun 14, 22:15 UTC16h 20m
2026-06-13 SDM6725 - Jun 13, 22:20 UTCJun 14, 16:25 UTC18h 5m
2026-06-13 SDM6623 KJA → SYX Jun 13, 19:10 UTCJun 13, 19:40 UTC30m
2026-06-11 SDM6725 - Jun 11, 13:40 UTCJun 12, 00:30 UTC10h 50m
2026-06-10 SDM6725 - Jun 10, 17:10 UTCJun 11, 15:15 UTC22h 5m
2026-06-09 SDM6825 KJA → MCX Jun 9, 22:50 UTCJun 10, 17:55 UTC19h 5m

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-73187 page for operator, model, and routing details .

Mode-S 151DE3 frequently asked

What is Mode-S code 151DE3?
151DE3 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73187.
Where is Mode-S 151DE3 registered?
Mode-S code 151DE3 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DE3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DE3, octal 05216743, decimal 1,383,907.
What flights does 151DE3 operate?
Mode-S 151DE3 has broadcast 20 distinct callsigns, including SDM6875, SDM6876, SDM6725, SDM6792, SDM6791.