Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

151E2D

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73261 · BOEING 737-800

Hex
151E2D
Octal
05217055
Decimal
1,383,981
Country
RU
Tail
RA-73261
Type
B738
No current signal · last broadcast 13h ago
Flights observed
55
Distinct callsigns
18
Country
RU
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 151E2D.

Country allocation

The ICAO 24-bit address 151E2D 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 18 distinct

Callsign Airline Flights Last seen
SYL487 - 10 2026-06-19
SYL736 Yakutia Airlines 9 2026-06-23
SYL476 Yakutia Airlines 6 2026-06-10
SYL475 - 4 2026-06-21
SYL474 Yakutia Airlines 4 2026-06-15
SYL473 Yakutia Airlines 4 2026-06-15
SYL748 Yakutia Airlines 3 2026-05-31
SYL9997 Yakutia Airlines 2 2026-05-30
SYL735 Yakutia Airlines 2 2026-06-01
SYL488 Yakutia Airlines 2 2026-06-19
SYL453 - 2 2026-06-24
SYL9986 Yakutia Airlines 1 2026-05-29
SYL9915 - 1 2026-06-18
SYL9914 Yakutia Airlines 1 2026-05-29
SYL794 Yakutia Airlines 1 2026-05-21
SYL793 Yakutia Airlines 1 2026-06-04
SYL479 Yakutia Airlines 1 2026-05-15
SYL468 Yakutia Airlines 1 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 SYL453 - Jun 24, 03:44 UTCJun 24, 19:39 UTC15h 55m
2026-06-23 SYL453 - Jun 23, 16:54 UTCJun 24, 10:04 UTC17h 10m
2026-06-23 SYL736 YKS → VKO Jun 23, 14:44 UTCJun 23, 15:04 UTC20m
2026-06-23 SYL736 YKS → VKO Jun 23, 12:29 UTCJun 23, 13:59 UTC1h 30m
2026-06-22 SYL736 YKS → VKO Jun 22, 14:14 UTCJun 23, 13:09 UTC22h 55m
2026-06-21 SYL475 - Jun 21, 05:59 UTCJun 21, 06:29 UTC30m
2026-06-19 SYL488 LED → YKS Jun 19, 16:29 UTCJun 20, 12:04 UTC19h 35m
2026-06-19 SYL487 - Jun 19, 03:15 UTCJun 19, 14:04 UTC10h 50m
2026-06-18 SYL9915 - Jun 18, 11:00 UTCJun 19, 01:10 UTC14h 9m
2026-06-16 SYL475 - Jun 16, 15:35 UTCJun 17, 04:15 UTC12h 41m
2026-06-16 SYL475 - Jun 16, 08:25 UTCJun 17, 04:15 UTC19h 51m
2026-06-15 SYL487 YKS → LED Jun 15, 18:45 UTCJun 16, 15:55 UTC21h 10m
2026-06-15 SYL474 AER → VKO Jun 15, 13:34 UTCJun 16, 08:55 UTC19h 20m
2026-06-15 SYL474 AER → VKO Jun 15, 07:40 UTCJun 15, 19:10 UTC11h 30m
2026-06-15 SYL473 VKO → AER Jun 15, 03:35 UTCJun 15, 05:00 UTC1h 25m
2026-06-14 SYL468 LED → SVX Jun 14, 13:00 UTCJun 14, 13:10 UTC10m
2026-06-13 SYL474 AER → VKO Jun 13, 17:25 UTCJun 13, 19:35 UTC2h 10m
2026-06-12 SYL488 LED → YKS Jun 12, 10:25 UTCJun 13, 04:30 UTC18h 4m
2026-06-10 SYL476 VKO → YKS Jun 10, 13:55 UTCJun 10, 14:20 UTC25m
2026-06-09 SYL487 YKS → LED Jun 9, 09:20 UTCJun 10, 05:10 UTC19h 50m
2026-06-09 SYL487 YKS → LED Jun 9, 09:10 UTCJun 10, 05:10 UTC20h 0m
2026-06-08 SYL487 YKS → LED Jun 8, 18:55 UTCJun 9, 10:45 UTC15h 50m
2026-06-08 SYL473 VKO → AER Jun 8, 07:05 UTCJun 8, 19:10 UTC12h 5m
2026-06-07 SYL476 VKO → YKS Jun 7, 14:50 UTCJun 8, 04:10 UTC13h 20m
2026-06-07 SYL476 VKO → YKS Jun 7, 03:45 UTCJun 8, 03:15 UTC23h 30m
2026-06-07 SYL476 VKO → YKS Jun 7, 02:50 UTCJun 7, 16:15 UTC13h 25m
2026-06-04 SYL793 VKO → UFA Jun 4, 03:30 UTCJun 4, 04:35 UTC1h 5m
2026-06-02 SYL736 YKS → VKO Jun 2, 12:00 UTCJun 2, 12:35 UTC35m
2026-06-01 SYL736 YKS → VKO Jun 1, 15:20 UTCJun 2, 12:35 UTC21h 15m
2026-06-01 SYL735 VKO → YKS Jun 1, 14:15 UTCJun 2, 12:35 UTC22h 20m
2026-06-01 SYL735 VKO → YKS Jun 1, 01:15 UTCJun 1, 15:35 UTC14h 20m
2026-05-31 SYL748 KJA → VKO May 31, 12:55 UTCJun 1, 06:30 UTC17h 35m
2026-05-31 SYL748 KJA → VKO May 31, 10:10 UTCJun 1, 06:30 UTC20h 20m
2026-05-30 SYL748 KJA → VKO May 30, 19:30 UTCMay 31, 13:30 UTC18h 0m
2026-05-30 SYL9997 VKO → KJA May 30, 05:10 UTCMay 30, 22:10 UTC17h 0m
2026-05-30 SYL9997 VKO → KJA May 30, 00:00 UTCMay 30, 22:10 UTC22h 10m
2026-05-29 SYL9914 UUD → SVX May 29, 11:45 UTCMay 30, 05:50 UTC18h 5m
2026-05-29 SYL9986 SBT → KUF May 29, 06:05 UTCMay 30, 05:15 UTC23h 10m
2026-05-28 SYL736 YKS → VKO May 28, 12:00 UTCMay 28, 14:25 UTC2h 25m
2026-05-26 SYL475 YKS → VKO May 26, 13:40 UTCMay 27, 04:14 UTC14h 35m
2026-05-25 SYL487 YKS → LED May 25, 18:30 UTCMay 26, 09:49 UTC15h 20m
2026-05-22 SYL473 VKO → AER May 22, 14:45 UTCMay 23, 03:20 UTC12h 34m
2026-05-22 SYL487 YKS → LED May 22, 11:25 UTCMay 22, 12:25 UTC1h 0m
2026-05-21 SYL794 UFA → VKO May 21, 15:45 UTCMay 21, 20:00 UTC4h 15m
2026-05-19 SYL476 VKO → YKS May 19, 17:30 UTCMay 20, 12:45 UTC19h 16m
2026-05-19 SYL476 VKO → YKS May 19, 12:10 UTCMay 20, 10:20 UTC22h 11m
2026-05-15 SYL479 VKO → MRV May 15, 02:45 UTCMay 15, 03:15 UTC30m
2026-05-12 SYL736 YKS → VKO May 12, 12:00 UTCMay 12, 18:45 UTC6h 45m
2026-05-11 SYL736 YKS → VKO May 11, 15:20 UTCMay 12, 13:25 UTC22h 6m
2026-05-11 SYL736 YKS → VKO May 11, 15:00 UTCMay 12, 13:15 UTC22h 16m

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-73261 page for operator, model, and routing details .

Mode-S 151E2D frequently asked

What is Mode-S code 151E2D?
151E2D is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73261.
Where is Mode-S 151E2D registered?
Mode-S code 151E2D is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151E2D broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151E2D, octal 05217055, decimal 1,383,981.
What flights does 151E2D operate?
Mode-S 151E2D has broadcast 18 distinct callsigns, including SYL487, SYL736, SYL476, SYL475, SYL474.