Apparatus

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sensors Mode-S transponder

151DF3

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73203 · AIRBUS A-319

Hex
151DF3
Octal
05216763
Decimal
1,383,923
Country
RU
Tail
RA-73203
Type
A319
No current signal · last broadcast 5h ago
Flights observed
154
Distinct callsigns
20
Country
RU
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 151DF3.

Country allocation

The ICAO 24-bit address 151DF3 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
SDM6721 - 27 2026-06-27
SDM6725 - 23 2026-06-30
SDM6621 - 12 2026-07-15
SDM6722 - 10 2026-06-14
SDM6783 - 8 2026-06-19
SDM6795 Rossiya - Russian Airlines 7 2026-06-02
SDM6572 - 6 2026-07-17
SDM6875 Rossiya - Russian Airlines 5 2026-06-13
SDM6726 - 5 2026-07-14
SDM6622 - 5 2026-07-15
SDM6331 - 4 2026-07-09
SDM6881 Rossiya - Russian Airlines 3 2026-05-13
SDM6784 - 3 2026-06-21
SDM6476 Rossiya - Russian Airlines 3 2026-06-04
SDM6446 - 3 2026-07-10
SDM6332 - 3 2026-07-09
SDM6986 Rossiya - Russian Airlines 2 2026-05-17
SDM6924 - 2 2026-07-06
SDM6923 Rossiya - Russian Airlines 2 2026-05-05
SDM6571 - 2 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 SDM6572 - Jul 17, 13:25 UTCJul 17, 21:30 UTC8h 5m
2026-07-15 SDM6622 - Jul 15, 19:50 UTCJul 15, 20:05 UTC15m
2026-07-15 SDM6621 - Jul 15, 17:40 UTCJul 15, 17:50 UTC10m
2026-07-14 SDM6726 - Jul 14, 07:00 UTCJul 14, 22:35 UTC15h 35m
2026-07-13 SDM6325 - Jul 13, 15:40 UTCJul 13, 16:55 UTC1h 15m
2026-07-11 SDM6572 - Jul 11, 06:35 UTCJul 11, 17:15 UTC10h 40m
2026-07-10 SDM6571 - Jul 10, 12:50 UTCJul 11, 09:15 UTC20h 25m
2026-07-10 SDM6446 - Jul 10, 11:50 UTCJul 11, 09:15 UTC21h 25m
2026-07-10 SDM6446 - Jul 10, 09:20 UTCJul 11, 07:25 UTC22h 5m
2026-07-10 SDM6446 - Jul 10, 00:10 UTCJul 10, 12:55 UTC12h 45m
2026-07-09 SDM6332 - Jul 9, 20:35 UTCJul 9, 21:30 UTC55m
2026-07-09 SDM6331 - Jul 9, 18:05 UTCJul 9, 18:40 UTC35m
2026-07-08 SDM6112 - Jul 8, 01:25 UTCJul 8, 06:30 UTC5h 5m
2026-07-07 SDM6340 - Jul 7, 20:45 UTCJul 7, 21:05 UTC20m
2026-07-07 SDM6027 LED → VKO Jul 7, 10:00 UTCJul 7, 10:10 UTC10m
2026-07-06 SDM6331 - Jul 6, 19:25 UTCJul 6, 19:55 UTC30m
2026-07-06 SDM6924 - Jul 6, 13:50 UTCJul 6, 14:15 UTC25m
2026-07-06 SDM6582 - Jul 6, 02:00 UTCJul 6, 02:10 UTC10m
2026-07-04 SDM6572 - Jul 4, 13:30 UTCJul 4, 17:10 UTC3h 40m
2026-07-03 SDM6572 - Jul 3, 19:50 UTCJul 4, 17:10 UTC21h 20m
2026-07-03 SDM6621 - Jul 3, 17:40 UTCJul 3, 17:50 UTC10m
2026-07-02 SDM6622 - Jul 2, 20:00 UTCJul 2, 20:20 UTC20m
2026-07-02 SDM6621 - Jul 2, 18:00 UTCJul 2, 18:15 UTC15m
2026-06-30 SDM6725 - Jun 30, 15:25 UTCJun 30, 22:50 UTC7h 25m
2026-06-29 SDM6725 - Jun 29, 21:05 UTCJun 30, 17:00 UTC19h 55m
2026-06-29 SDM6621 - Jun 29, 17:45 UTCJun 29, 17:59 UTC15m
2026-06-28 SDM6622 - Jun 28, 19:59 UTCJun 28, 20:19 UTC20m
2026-06-28 SDM6621 - Jun 28, 17:50 UTCJun 28, 18:05 UTC15m
2026-06-27 SDM6721 - Jun 27, 14:54 UTCJun 27, 20:49 UTC5h 55m
2026-06-26 SDM6721 - Jun 26, 20:00 UTCJun 27, 16:20 UTC20h 20m
2026-06-26 SDM6621 - Jun 26, 17:50 UTCJun 26, 17:59 UTC10m
2026-06-25 SDM6725 - Jun 25, 14:59 UTCJun 25, 22:24 UTC7h 25m
2026-06-24 SDM6725 - Jun 24, 19:49 UTCJun 25, 16:29 UTC20h 40m
2026-06-24 SDM6621 - Jun 24, 17:40 UTCJun 24, 17:50 UTC10m
2026-06-22 SDM6621 - Jun 22, 17:55 UTCJun 22, 18:04 UTC10m
2026-06-21 SDM6784 - Jun 21, 19:50 UTCJun 21, 21:14 UTC1h 25m
2026-06-19 SDM6721 - Jun 19, 20:49 UTCJun 20, 20:45 UTC23h 55m
2026-06-19 SDM6784 OSS → KJA Jun 19, 19:45 UTCJun 20, 16:19 UTC20h 35m
2026-06-19 SDM6783 - Jun 19, 13:59 UTCJun 19, 21:09 UTC7h 10m
2026-06-17 SDM6825 KJA → MCX Jun 17, 13:15 UTCJun 18, 01:00 UTC11h 45m
2026-06-15 SDM6721 - Jun 15, 15:00 UTCJun 15, 20:40 UTC5h 40m
2026-06-14 SDM6722 - Jun 14, 20:50 UTCJun 15, 20:40 UTC23h 49m
2026-06-14 SDM6721 - Jun 14, 19:35 UTCJun 15, 16:30 UTC20h 55m
2026-06-14 SDM6721 - Jun 14, 15:00 UTCJun 14, 20:55 UTC5h 55m
2026-06-13 SDM6721 - Jun 13, 21:40 UTCJun 14, 20:45 UTC23h 6m
2026-06-13 SDM6875 KJA → AER Jun 13, 11:00 UTCJun 13, 22:45 UTC11h 45m
2026-06-11 SDM6622 PKX → KJA Jun 11, 19:50 UTCJun 11, 20:10 UTC20m
2026-06-11 SDM6621 KJA → PKX Jun 11, 17:50 UTCJun 11, 18:05 UTC15m
2026-06-10 SDM6721 KJA → ALA Jun 10, 15:05 UTCJun 10, 20:55 UTC5h 50m
2026-06-09 SDM6721 KJA → ALA Jun 9, 21:15 UTCJun 10, 20:45 UTC23h 30m

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-73203 page for operator, model, and routing details .

Mode-S 151DF3 frequently asked

What is Mode-S code 151DF3?
151DF3 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73203.
Where is Mode-S 151DF3 registered?
Mode-S code 151DF3 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DF3 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DF3, octal 05216763, decimal 1,383,923.
What flights does 151DF3 operate?
Mode-S 151DF3 has broadcast 20 distinct callsigns, including SDM6721, SDM6725, SDM6621, SDM6722, SDM6783.