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 Jul 24, 15:15 UTC
Flights observed
111
Distinct callsigns
9
Country
RU
Last broadcast
Jul 24, 15:15 UTC

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 9 distinct

Callsign Airline Flights Last seen
IZA926 Izhavia 28 2026-07-24
IZA925 - 21 2026-07-21
IZA307 Izhavia 21 2026-07-22
IZA301 Izhavia 18 2026-07-22
IZA308 Izhavia 7 2026-06-02
IZA902 Izhavia 5 2026-07-17
IZA901 Izhavia 5 2026-07-23
IZA302 - 4 2026-07-15
IZA501 Izhavia 2 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 IZA926 LED → IJK Jul 24, 14:55 UTCJul 24, 15:15 UTC20m
2026-07-23 IZA901 IJK → KGD Jul 23, 20:05 UTCJul 23, 20:30 UTC25m
2026-07-23 IZA926 LED → IJK Jul 23, 11:20 UTCJul 23, 11:45 UTC25m
2026-07-22 IZA307 IJK → DME Jul 22, 16:40 UTCJul 22, 17:00 UTC20m
2026-07-22 IZA307 IJK → DME Jul 22, 15:35 UTCJul 22, 16:05 UTC30m
2026-07-22 IZA301 IJK → DME Jul 22, 03:10 UTCJul 22, 04:25 UTC1h 15m
2026-07-21 IZA307 IJK → DME Jul 21, 17:50 UTCJul 21, 18:00 UTC10m
2026-07-21 IZA925 - Jul 21, 10:45 UTCJul 21, 17:10 UTC6h 25m
2026-07-21 IZA301 IJK → DME Jul 21, 04:10 UTCJul 21, 08:10 UTC4h 0m
2026-07-20 IZA901 IJK → KGD Jul 20, 19:55 UTCJul 20, 20:20 UTC25m
2026-07-19 IZA926 - Jul 19, 11:55 UTCJul 19, 12:15 UTC20m
2026-07-18 IZA307 IJK → DME Jul 18, 15:35 UTCJul 18, 16:05 UTC30m
2026-07-18 IZA925 - Jul 18, 08:45 UTCJul 18, 09:10 UTC25m
2026-07-17 IZA307 IJK → DME Jul 17, 15:44 UTCJul 17, 16:04 UTC20m
2026-07-17 IZA902 KGD → IJK Jul 17, 00:20 UTCJul 17, 01:05 UTC45m
2026-07-16 IZA901 IJK → KGD Jul 16, 19:35 UTCJul 16, 22:30 UTC2h 55m
2026-07-15 IZA926 LED → LED Jul 15, 11:55 UTCJul 15, 12:20 UTC25m
2026-07-15 IZA925 - Jul 15, 10:15 UTCJul 15, 10:25 UTC10m
2026-07-15 IZA302 - Jul 15, 06:45 UTCJul 15, 07:10 UTC25m
2026-07-12 IZA926 - Jul 12, 14:20 UTCJul 12, 14:30 UTC10m
2026-07-11 IZA926 - Jul 11, 12:05 UTCJul 11, 12:20 UTC15m
2026-07-10 IZA902 - Jul 10, 00:35 UTCJul 10, 01:00 UTC25m
2026-07-08 IZA925 - Jul 8, 12:45 UTCJul 8, 13:05 UTC20m
2026-07-07 IZA902 - Jul 7, 00:10 UTCJul 7, 00:50 UTC40m
2026-07-06 IZA901 - Jul 6, 20:50 UTCJul 6, 22:05 UTC1h 15m
2026-07-06 IZA926 - Jul 6, 15:40 UTCJul 6, 15:55 UTC15m
2026-07-04 IZA926 - Jul 4, 12:00 UTCJul 4, 12:20 UTC20m
2026-07-04 IZA925 - Jul 4, 10:20 UTCJul 4, 10:30 UTC10m
2026-07-03 IZA926 LED → IJK Jul 3, 12:00 UTCJul 3, 12:15 UTC15m
2026-06-29 IZA901 - Jun 29, 22:44 UTCJun 29, 23:25 UTC40m
2026-06-22 IZA926 LED → IJK Jun 22, 11:30 UTCJun 22, 11:54 UTC25m
2026-06-21 IZA926 LED → IJK Jun 21, 11:55 UTCJun 21, 12:14 UTC20m
2026-06-19 IZA926 LED → IJK Jun 19, 12:19 UTCJun 19, 12:39 UTC20m
2026-06-19 IZA926 LED → IJK Jun 19, 10:59 UTCJun 19, 11:14 UTC15m
2026-06-16 IZA926 LED → IJK Jun 16, 15:20 UTCJun 16, 15:40 UTC20m
2026-06-14 IZA926 LED → IJK Jun 14, 12:00 UTCJun 14, 12:10 UTC10m
2026-06-14 IZA302 DME → IJK Jun 14, 05:50 UTCJun 14, 06:05 UTC15m
2026-06-13 IZA926 LED → IJK Jun 13, 11:55 UTCJun 13, 12:15 UTC20m
2026-06-13 IZA925 IJK → LED Jun 13, 09:10 UTCJun 13, 09:25 UTC15m
2026-06-12 IZA902 KGD → IJK Jun 12, 00:55 UTCJun 12, 01:45 UTC50m
2026-06-09 IZA307 IJK → DME Jun 9, 15:35 UTCJun 9, 15:50 UTC15m
2026-06-09 IZA302 DME → IJK Jun 9, 07:15 UTCJun 9, 09:20 UTC2h 5m
2026-06-09 IZA301 IJK → DME Jun 9, 03:25 UTCJun 9, 03:50 UTC25m
2026-06-09 IZA902 KGD → IJK Jun 9, 00:00 UTCJun 9, 00:55 UTC55m
2026-06-08 IZA301 IJK → DME Jun 8, 04:25 UTCJun 8, 04:35 UTC10m
2026-06-06 IZA925 IJK → LED Jun 6, 10:20 UTCJun 6, 10:39 UTC20m
2026-06-06 IZA925 IJK → LED Jun 6, 09:00 UTCJun 6, 09:09 UTC10m
2026-06-05 IZA925 IJK → LED Jun 5, 10:50 UTCJun 5, 11:00 UTC10m
2026-06-05 IZA302 DME → IJK Jun 5, 07:45 UTCJun 5, 09:30 UTC1h 45m
2026-06-04 IZA926 LED → IJK Jun 4, 11:30 UTCJun 5, 04:25 UTC16h 55m

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 Jul 24, 15:15 UTC.
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 9 distinct callsigns, including IZA926, IZA925, IZA307, IZA301, IZA308.