Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
50
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
TYA416 NordStar 5 2026-05-21
TYA414 NordStar 4 2026-06-06
TYA412 NordStar 4 2026-06-07
TYA102 NordStar 4 2026-05-29
TYA301 NordStar 3 2026-05-30
TYA104 NordStar 3 2026-06-01
TYA927 NordStar 2 2026-05-25
TYA4520 NordStar 2 2026-05-14
TYA415 NordStar 2 2026-05-22
TYA406 NordStar 2 2026-05-13
TYA131 NordStar 2 2026-05-23
TYA9611 - 1 2026-06-02
TYA952 NordStar 1 2026-06-08
TYA915 NordStar 1 2026-04-26
TYA912 NordStar 1 2026-05-24
TYA910 NordStar 1 2026-06-09
TYA4553 - 1 2026-05-14
TYA4552 - 1 2026-05-29
TYA4551 - 1 2026-04-26
TYA4400 NordStar 1 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-02 TYA9611 - Jun 2, 11:40 UTCJun 3, 09:10 UTC21h 30m
2026-06-01 TYA4211 DME → KUF Jun 1, 18:40 UTCJun 2, 11:50 UTC17h 10m
2026-06-01 TYA104 NSK → DME Jun 1, 04:30 UTCJun 1, 05:55 UTC1h 25m
2026-05-30 TYA301 KJA → LED May 30, 00:50 UTCMay 30, 16:45 UTC15h 55m
2026-05-29 TYA4552 - May 29, 15:30 UTCMay 30, 13:05 UTC21h 35m
2026-05-29 TYA102 NSK → DME May 29, 02:30 UTCMay 29, 13:15 UTC10h 45m
2026-05-26 TYA104 NSK → DME May 26, 04:35 UTCMay 26, 21:40 UTC17h 5m
2026-05-25 TYA927 PEE → KZN May 25, 16:55 UTCMay 25, 17:20 UTC25m
2026-05-24 TYA912 UFA → NSK May 24, 07:00 UTCMay 24, 20:50 UTC13h 50m
2026-05-23 TYA131 AER → ABA May 23, 21:05 UTCMay 24, 20:45 UTC23h 40m
2026-05-23 TYA131 AER → ABA May 23, 08:50 UTCMay 24, 07:00 UTC22h 11m
2026-05-23 TYA132 ABA → AER May 23, 07:50 UTCMay 23, 22:05 UTC14h 15m
2026-05-22 TYA415 LED → NSK May 22, 21:15 UTCMay 22, 21:30 UTC15m
2026-05-21 TYA416 NSK → LED May 21, 21:45 UTCMay 22, 03:25 UTC5h 40m
2026-05-20 TYA301 KJA → LED May 20, 13:25 UTCMay 21, 03:50 UTC14h 25m
2026-05-19 TYA102 NSK → DME May 19, 07:30 UTCMay 19, 13:40 UTC6h 10m
2026-05-18 TYA102 NSK → DME May 18, 16:25 UTCMay 19, 13:40 UTC21h 14m
2026-05-16 TYA414 NSK → MRV May 16, 04:00 UTCMay 16, 21:40 UTC17h 40m
2026-05-16 TYA414 NSK → MRV May 16, 00:00 UTCMay 16, 21:40 UTC21h 40m
2026-05-15 TYA414 NSK → MRV May 15, 16:00 UTCMay 16, 12:16 UTC20h 16m
2026-05-14 TYA4553 - May 14, 17:25 UTCMay 15, 16:30 UTC23h 4m
2026-05-14 TYA4520 KJA → OVB May 14, 12:20 UTCMay 14, 17:45 UTC5h 25m
2026-05-13 TYA4520 KJA → OVB May 13, 20:50 UTCMay 14, 17:45 UTC20h 55m
2026-05-13 TYA406 NSK → LED May 13, 12:50 UTCMay 14, 12:45 UTC23h 55m
2026-05-13 TYA406 NSK → LED May 13, 12:40 UTCMay 13, 21:20 UTC8h 40m
2026-05-12 TYA104 NSK → DME May 12, 04:30 UTCMay 12, 05:10 UTC40m
2026-05-11 TYA927 PEE → KZN May 11, 16:35 UTCMay 11, 16:55 UTC20m
2026-05-05 TYA415 LED → NSK May 5, 22:15 UTCMay 6, 05:15 UTC7h 0m
2026-05-05 TYA416 NSK → LED May 5, 04:50 UTCMay 6, 04:45 UTC23h 55m
2026-05-05 TYA416 NSK → LED May 5, 04:30 UTCMay 5, 23:05 UTC18h 35m
2026-05-04 TYA416 NSK → LED May 4, 10:50 UTCMay 5, 06:25 UTC19h 36m
2026-05-04 TYA416 NSK → LED May 4, 09:40 UTCMay 5, 06:25 UTC20h 46m
2026-05-02 TYA102 NSK → DME May 2, 21:00 UTCMay 3, 03:10 UTC6h 10m
2026-04-29 TYA4212 - Apr 29, 07:59 UTCApr 29, 08:10 UTC10m
2026-04-28 TYA106 NSK → DME Apr 28, 06:45 UTCApr 28, 08:15 UTC1h 30m
2026-04-26 TYA4551 - Apr 26, 15:45 UTCApr 26, 16:20 UTC35m
2026-04-26 TYA915 NSK → OVB Apr 26, 06:15 UTCApr 26, 06:45 UTC30m
2026-04-23 TYA302 LED → KJA Apr 23, 16:50 UTCApr 23, 20:55 UTC4h 4m
2026-04-23 TYA301 KJA → LED Apr 23, 13:35 UTCApr 23, 14:25 UTC50m

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 TYA416, TYA414, TYA412, TYA102, TYA301.