Apparatus

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sensors Mode-S transponder

151DE1

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73185 · BOEING 737-800

Hex
151DE1
Octal
05216741
Decimal
1,383,905
Country
RU
Tail
RA-73185
Type
B738
No current signal · last broadcast 1h ago
Flights observed
51
Distinct callsigns
6
Country
RU
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 151DE1.

Country allocation

The ICAO 24-bit address 151DE1 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 6 distinct

Callsign Airline Flights Last seen
IZA301 Izhavia 13 2026-05-27
IZA925 Izhavia 12 2026-05-26
IZA307 Izhavia 11 2026-05-28
IZA926 Izhavia 9 2026-05-30
IZA308 Izhavia 4 2026-05-06
IZA501 Izhavia 2 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 IZA926 LED → IJK May 30, 12:05 UTCMay 30, 12:15 UTC10m
2026-05-28 IZA307 IJK → DME May 28, 15:45 UTCMay 28, 16:05 UTC20m
2026-05-27 IZA307 IJK → DME May 27, 15:45 UTCMay 28, 09:00 UTC17h 15m
2026-05-27 IZA926 LED → IJK May 27, 11:55 UTCMay 27, 12:20 UTC25m
2026-05-27 IZA301 IJK → DME May 27, 03:04 UTCMay 27, 03:29 UTC25m
2026-05-26 IZA925 IJK → LED May 26, 08:34 UTCMay 26, 19:40 UTC11h 5m
2026-05-26 IZA301 IJK → DME May 26, 03:15 UTCMay 26, 05:59 UTC2h 45m
2026-05-25 IZA301 IJK → DME May 25, 08:55 UTCMay 26, 05:59 UTC21h 4m
2026-05-24 IZA926 LED → IJK May 24, 12:10 UTCMay 24, 12:20 UTC10m
2026-05-22 IZA307 IJK → DME May 22, 15:40 UTCMay 22, 16:10 UTC30m
2026-05-22 IZA926 LED → IJK May 22, 12:00 UTCMay 22, 12:20 UTC20m
2026-05-21 IZA925 IJK → LED May 21, 16:01 UTCMay 22, 09:05 UTC17h 5m
2026-05-21 IZA925 IJK → LED May 21, 09:00 UTCMay 21, 16:05 UTC7h 5m
2026-05-20 IZA307 IJK → DME May 20, 15:40 UTCMay 20, 16:05 UTC25m
2026-05-20 IZA925 IJK → LED May 20, 08:40 UTCMay 20, 09:05 UTC25m
2026-05-19 IZA301 IJK → DME May 19, 03:05 UTCMay 19, 03:30 UTC25m
2026-05-18 IZA307 IJK → DME May 18, 15:40 UTCMay 18, 16:00 UTC20m
2026-05-18 IZA301 IJK → DME May 18, 04:15 UTCMay 18, 04:30 UTC15m
2026-05-17 IZA301 IJK → DME May 17, 05:55 UTCMay 17, 17:20 UTC11h 25m
2026-05-16 IZA926 LED → IJK May 16, 11:55 UTCMay 16, 12:16 UTC20m
2026-05-12 IZA301 IJK → DME May 12, 03:35 UTCMay 12, 18:35 UTC15h 0m
2026-05-11 IZA307 IJK → DME May 11, 15:35 UTCMay 12, 03:40 UTC12h 6m
2026-05-11 IZA925 IJK → LED May 11, 08:35 UTCMay 11, 09:05 UTC30m
2026-05-11 IZA301 IJK → DME May 11, 03:15 UTCMay 11, 03:35 UTC20m
2026-05-10 IZA307 IJK → DME May 10, 15:55 UTCMay 10, 16:04 UTC10m
2026-05-10 IZA926 LED → IJK May 10, 11:55 UTCMay 10, 12:10 UTC15m
2026-05-10 IZA925 IJK → LED May 10, 08:35 UTCMay 10, 09:05 UTC30m
2026-05-08 IZA501 IJK → AER May 8, 05:09 UTCMay 8, 05:20 UTC10m
2026-05-07 IZA501 IJK → AER May 7, 15:50 UTCMay 8, 04:39 UTC12h 49m
2026-05-06 IZA308 DME → IJK May 6, 18:20 UTCMay 6, 18:30 UTC10m
2026-05-06 IZA307 IJK → DME May 6, 15:40 UTCMay 6, 16:05 UTC25m
2026-05-06 IZA925 IJK → LED May 6, 08:45 UTCMay 6, 09:05 UTC20m
2026-05-04 IZA926 LED → IJK May 4, 11:55 UTCMay 4, 12:15 UTC20m
2026-05-03 IZA926 LED → IJK May 3, 11:55 UTCMay 3, 12:15 UTC20m
2026-05-03 IZA925 IJK → LED May 3, 08:35 UTCMay 3, 09:00 UTC25m
2026-05-03 IZA301 IJK → DME May 3, 03:10 UTCMay 3, 03:35 UTC24m
2026-04-29 IZA308 DME → IJK Apr 29, 14:55 UTCApr 29, 23:10 UTC8h 14m
2026-04-28 IZA307 IJK → DME Apr 28, 15:50 UTCApr 28, 16:15 UTC25m
2026-04-28 IZA925 IJK → LED Apr 28, 08:45 UTCApr 28, 09:25 UTC40m
2026-04-27 IZA301 IJK → DME Apr 27, 03:15 UTCApr 27, 16:05 UTC12h 50m
2026-04-25 IZA301 IJK → DME Apr 25, 07:45 UTCApr 25, 08:05 UTC20m
2026-04-24 IZA301 IJK → DME Apr 24, 03:10 UTCApr 24, 09:05 UTC5h 55m
2026-04-22 IZA308 DME → IJK Apr 22, 18:25 UTCApr 22, 18:40 UTC15m
2026-04-22 IZA307 IJK → DME Apr 22, 15:45 UTCApr 22, 16:05 UTC20m
2026-04-22 IZA925 IJK → LED Apr 22, 08:40 UTCApr 22, 09:00 UTC20m
2026-04-20 IZA925 IJK → LED Apr 20, 18:30 UTCApr 21, 09:00 UTC14h 30m
2026-04-17 IZA925 IJK → LED Apr 17, 08:40 UTCApr 17, 09:05 UTC25m
2026-04-17 IZA301 IJK → DME Apr 17, 03:20 UTCApr 17, 03:40 UTC20m
2026-04-14 IZA307 - Apr 14, 15:45 UTCApr 14, 16:05 UTC20m
2026-04-14 IZA926 - Apr 14, 08:45 UTCApr 14, 09:05 UTC20m

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-73185 page for operator, model, and routing details .

Mode-S 151DE1 frequently asked

What is Mode-S code 151DE1?
151DE1 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73185.
Where is Mode-S 151DE1 registered?
Mode-S code 151DE1 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DE1 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DE1, octal 05216741, decimal 1,383,905.
What flights does 151DE1 operate?
Mode-S 151DE1 has broadcast 6 distinct callsigns, including IZA301, IZA925, IZA307, IZA926, IZA308.