Apparatus

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sensors Mode-S transponder

151E23

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73251 · BOEING 737-800

Hex
151E23
Octal
05217043
Decimal
1,383,971
Country
RU
Tail
RA-73251
Type
B738
No current signal · last broadcast 1d ago
Flights observed
89
Distinct callsigns
20
Country
RU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 151E23.

Country allocation

The ICAO 24-bit address 151E23 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
TYA104 NordStar 10 2026-07-26
TYA416 NordStar 6 2026-07-21
TYA301 NordStar 5 2026-06-13
TYA102 NordStar 5 2026-06-19
TYA414 NordStar 4 2026-06-06
TYA412 NordStar 4 2026-06-07
TYA408 NordStar 4 2026-06-21
TYA406 - 4 2026-07-18
TYA132 - 4 2026-07-06
TYA415 NordStar 3 2026-07-21
TYA302 - 3 2026-07-04
TYA141 NordStar 3 2026-07-21
TYA927 NordStar 2 2026-05-25
TYA925 NordStar 2 2026-06-17
TYA4520 NordStar 2 2026-05-14
TYA410 - 2 2026-06-22
TYA404 NordStar 2 2026-06-18
TYA322 - 2 2026-07-08
TYA142 - 2 2026-07-21
TYA131 NordStar 2 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TYA104 NSK → DME Jul 26, 04:25 UTCJul 26, 05:05 UTC40m
2026-07-21 TYA415 LED → NSK Jul 21, 21:00 UTCJul 21, 23:00 UTC2h 0m
2026-07-21 TYA142 - Jul 21, 14:25 UTCJul 21, 18:25 UTC4h 0m
2026-07-21 TYA141 LED → ABA Jul 21, 09:00 UTCJul 21, 12:20 UTC3h 20m
2026-07-21 TYA141 LED → ABA Jul 21, 08:20 UTCJul 21, 08:30 UTC10m
2026-07-21 TYA416 NSK → LED Jul 21, 02:55 UTCJul 21, 03:50 UTC55m
2026-07-19 TYA108 KJA → DME Jul 19, 23:00 UTCJul 20, 02:05 UTC3h 5m
2026-07-18 TYA406 - Jul 18, 12:35 UTCJul 18, 21:15 UTC8h 40m
2026-07-13 TYA104 - Jul 13, 04:20 UTCJul 13, 05:45 UTC1h 25m
2026-07-08 TYA322 - Jul 8, 14:00 UTCJul 8, 14:40 UTC40m
2026-07-07 TYA321 - Jul 7, 09:05 UTCJul 7, 09:45 UTC40m
2026-07-06 TYA132 - Jul 6, 07:45 UTCJul 6, 22:10 UTC14h 25m
2026-07-05 TYA132 - Jul 5, 22:50 UTCJul 6, 22:10 UTC23h 20m
2026-07-05 TYA407 - Jul 5, 13:05 UTCJul 6, 08:45 UTC19h 40m
2026-07-04 TYA302 - Jul 4, 20:55 UTCJul 5, 13:20 UTC16h 25m
2026-07-04 TYA406 - Jul 4, 12:25 UTCJul 4, 14:25 UTC2h 0m
2026-07-02 TYA132 - Jul 2, 08:10 UTCJul 2, 22:25 UTC14h 15m
2026-06-27 TYA302 - Jun 27, 21:10 UTCJun 28, 07:40 UTC10h 30m
2026-06-24 TYA402 - Jun 24, 02:30 UTCJun 24, 10:49 UTC8h 20m
2026-06-22 TYA410 - Jun 22, 02:19 UTCJun 22, 03:50 UTC1h 30m
2026-06-21 TYA410 NSK → DME Jun 21, 02:50 UTCJun 22, 02:45 UTC23h 55m
2026-06-21 TYA408 DME → GDZ Jun 21, 02:20 UTCJun 21, 03:00 UTC40m
2026-06-19 TYA102 NSK → DME Jun 19, 04:50 UTCJun 20, 03:54 UTC23h 5m
2026-06-19 TYA104 - Jun 19, 04:39 UTCJun 20, 02:44 UTC22h 5m
2026-06-18 TYA404 NSK → DME Jun 18, 07:00 UTCJun 19, 04:44 UTC21h 44m
2026-06-17 TYA404 NSK → DME Jun 17, 20:35 UTCJun 18, 08:35 UTC12h 0m
2026-06-17 TYA925 NSK → GOJ Jun 17, 07:00 UTCJun 17, 21:35 UTC14h 35m
2026-06-17 TYA925 NSK → GOJ Jun 17, 01:25 UTCJun 17, 21:35 UTC20h 10m
2026-06-16 TYA142 ABA → LED Jun 16, 15:00 UTCJun 17, 08:20 UTC17h 21m
2026-06-15 TYA141 LED → ABA Jun 15, 21:25 UTCJun 16, 12:55 UTC15h 30m
2026-06-15 TYA104 - Jun 15, 05:15 UTCJun 16, 03:35 UTC22h 20m
2026-06-15 TYA104 - Jun 15, 00:49 UTCJun 15, 22:00 UTC21h 10m
2026-06-15 TYA104 - Jun 15, 00:40 UTCJun 15, 22:00 UTC21h 20m
2026-06-14 TYA104 - Jun 14, 14:00 UTCJun 15, 06:35 UTC16h 34m
2026-06-14 TYA408 DME → GDZ Jun 14, 02:50 UTCJun 15, 00:55 UTC22h 5m
2026-06-14 TYA408 DME → GDZ Jun 14, 02:25 UTCJun 15, 00:45 UTC22h 20m
2026-06-13 TYA408 DME → GDZ Jun 13, 15:05 UTCJun 14, 14:05 UTC23h 0m
2026-06-13 TYA301 KJA → LED Jun 13, 13:00 UTCJun 14, 03:55 UTC14h 55m
2026-06-12 TYA301 KJA → LED Jun 12, 22:40 UTCJun 13, 16:30 UTC17h 49m
2026-06-10 TYA101 DME → NSK Jun 10, 21:40 UTCJun 10, 22:15 UTC35m
2026-06-09 TYA910 KUF → TJM Jun 9, 20:25 UTCJun 9, 20:45 UTC20m
2026-06-08 TYA952 VOG → SVX Jun 8, 16:10 UTCJun 8, 16:50 UTC40m
2026-06-08 TYA322 AER → KJA Jun 8, 00:25 UTCJun 8, 01:05 UTC40m
2026-06-07 TYA412 NSK → AER Jun 7, 09:50 UTCJun 7, 11:40 UTC1h 50m
2026-06-06 TYA412 NSK → AER Jun 6, 10:50 UTCJun 7, 10:45 UTC23h 55m
2026-06-06 TYA414 NSK → MRV Jun 6, 10:04 UTCJun 6, 11:14 UTC1h 10m
2026-06-05 TYA4400 DME → UFA Jun 5, 08:25 UTCJun 5, 08:50 UTC25m
2026-06-04 TYA1032 AER → DME Jun 4, 10:50 UTCJun 4, 11:15 UTC25m
2026-06-03 TYA412 NSK → AER Jun 3, 17:05 UTCJun 4, 09:15 UTC16h 10m
2026-06-03 TYA412 NSK → AER Jun 3, 08:55 UTCJun 4, 08:45 UTC23h 50m

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-73251 page for operator, model, and routing details .

Mode-S 151E23 frequently asked

What is Mode-S code 151E23?
151E23 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73251.
Where is Mode-S 151E23 registered?
Mode-S code 151E23 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151E23 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151E23, octal 05217043, decimal 1,383,971.
What flights does 151E23 operate?
Mode-S 151E23 has broadcast 20 distinct callsigns, including TYA104, TYA416, TYA301, TYA102, TYA414.