Apparatus

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sensors Mode-S transponder

151D8D

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73101 · BOEING 737-800

Hex
151D8D
Octal
05216615
Decimal
1,383,821
Country
RU
Tail
RA-73101
Type
B738
No current signal · last broadcast 3h ago
Flights observed
79
Distinct callsigns
20
Country
RU
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 151D8D.

Country allocation

The ICAO 24-bit address 151D8D 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
AFL1454 Aeroflot Russian Airlines 10 2026-05-31
AFL1455 Aeroflot Russian Airlines 9 2026-05-26
AFL1751 Aeroflot Russian Airlines 8 2026-06-02
AFL1461 Aeroflot Russian Airlines 4 2026-04-26
AFL1444 Aeroflot Russian Airlines 4 2026-05-22
AFL1750 Aeroflot Russian Airlines 3 2026-06-01
AFL1487 Aeroflot Russian Airlines 3 2026-05-12
AFL1442 Aeroflot Russian Airlines 3 2026-05-30
AFL1213 Aeroflot Russian Airlines 3 2026-05-26
AFL1562 Aeroflot Russian Airlines 2 2026-05-05
AFL1549 Aeroflot Russian Airlines 2 2026-05-23
AFL1548 Aeroflot Russian Airlines 2 2026-05-24
AFL1490 Aeroflot Russian Airlines 2 2026-05-20
AFL1445 Aeroflot Russian Airlines 2 2026-04-22
AFL1365 - 2 2026-04-18
AFL1836 Aeroflot Russian Airlines 1 2026-05-31
AFL1639 Aeroflot Russian Airlines 1 2026-05-17
AFL1638 Aeroflot Russian Airlines 1 2026-04-22
AFL1563 Aeroflot Russian Airlines 1 2026-04-28
AFL1538 Aeroflot Russian Airlines 1 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 AFL1751 YKS → SVO Jun 2, 09:00 UTCJun 2, 23:30 UTC14h 30m
2026-06-01 AFL1751 YKS → SVO Jun 1, 23:20 UTCJun 2, 23:15 UTC23h 55m
2026-06-01 AFL1750 SVO → YKS Jun 1, 22:00 UTCJun 2, 18:20 UTC20h 20m
2026-06-01 AFL1750 SVO → YKS Jun 1, 21:05 UTCJun 1, 21:25 UTC20m
2026-05-31 AFL1454 SVO → UUD May 31, 18:35 UTCJun 1, 05:55 UTC11h 20m
2026-05-31 AFL1836 SVO → MSQ May 31, 12:20 UTCMay 31, 12:35 UTC15m
2026-05-30 AFL1442 SVO → IKT May 30, 22:10 UTCMay 30, 22:35 UTC25m
2026-05-30 AFL1442 SVO → IKT May 30, 18:50 UTCMay 30, 19:10 UTC20m
2026-05-30 AFL1264 SVO → KRR May 30, 04:30 UTCMay 30, 05:05 UTC35m
2026-05-29 AFL1751 YKS → SVO May 29, 08:45 UTCMay 29, 09:25 UTC40m
2026-05-28 AFL1082 SVO → GDZ May 28, 10:55 UTCMay 28, 11:50 UTC55m
2026-05-26 AFL1455 UUD → SVO May 26, 19:45 UTCMay 27, 06:34 UTC10h 50m
2026-05-26 AFL1213 KUF → SVO May 26, 14:40 UTCMay 26, 15:09 UTC30m
2026-05-26 AFL1213 KUF → SVO May 26, 14:00 UTCMay 26, 14:09 UTC10m
2026-05-26 AFL1212 SVO → KUF May 26, 10:50 UTCMay 26, 11:54 UTC1h 5m
2026-05-25 AFL1455 UUD → SVO May 25, 21:49 UTCMay 26, 06:10 UTC8h 20m
2026-05-25 AFL1454 SVO → UUD May 25, 18:25 UTCMay 25, 18:45 UTC20m
2026-05-24 AFL1548 SVO → OVB May 24, 19:50 UTCMay 24, 20:30 UTC40m
2026-05-24 AFL1548 SVO → OVB May 24, 18:40 UTCMay 24, 19:05 UTC25m
2026-05-23 AFL1549 OVB → SVO May 23, 20:05 UTCMay 24, 01:05 UTC5h 0m
2026-05-22 AFL1444 SVO → IKT May 22, 08:05 UTCMay 22, 16:30 UTC8h 25m
2026-05-20 AFL1490 SVO → KJA May 20, 10:50 UTCMay 20, 18:30 UTC7h 40m
2026-05-19 AFL1490 SVO → KJA May 19, 14:05 UTCMay 20, 12:55 UTC22h 51m
2026-05-17 AFL1639 OMS → SVO May 17, 14:50 UTCMay 17, 15:15 UTC25m
2026-05-14 AFL1454 SVO → UUD May 14, 11:25 UTCMay 14, 22:10 UTC10h 45m
2026-05-12 AFL1487 KJA → SVO May 12, 16:00 UTCMay 13, 09:35 UTC17h 35m
2026-05-12 AFL1487 KJA → SVO May 12, 13:25 UTCMay 13, 09:35 UTC20h 10m
2026-05-12 AFL1487 KJA → SVO May 12, 13:10 UTCMay 13, 09:35 UTC20h 25m
2026-05-12 AFL1486 SVO → KJA May 12, 08:00 UTCMay 12, 16:25 UTC8h 25m
2026-05-10 AFL1455 UUD → SVO May 10, 01:39 UTCMay 10, 02:00 UTC20m
2026-05-09 AFL1454 SVO → UUD May 9, 23:15 UTCMay 9, 23:25 UTC10m
2026-05-09 AFL1467 SVX → SVO May 9, 03:45 UTCMay 9, 23:25 UTC19h 40m
2026-05-07 AFL1442 SVO → IKT May 7, 11:25 UTCMay 7, 22:20 UTC10h 55m
2026-05-06 AFL1538 SVO → TOF May 6, 20:00 UTCMay 7, 09:40 UTC13h 40m
2026-05-05 AFL1562 SVO → IKT May 5, 03:55 UTCMay 5, 04:30 UTC35m
2026-05-04 AFL1455 UUD → SVO May 4, 01:44 UTCMay 4, 04:00 UTC2h 15m
2026-05-03 AFL1454 SVO → UUD May 3, 22:05 UTCMay 3, 22:34 UTC30m
2026-05-03 AFL1454 SVO → UUD May 3, 01:40 UTCMay 3, 22:34 UTC20h 54m
2026-05-02 AFL1549 OVB → SVO May 2, 23:20 UTCMay 3, 22:34 UTC23h 14m
2026-05-02 AFL1751 YKS → SVO May 2, 08:55 UTCMay 3, 02:00 UTC17h 5m
2026-05-01 AFL1751 YKS → SVO May 1, 16:00 UTCMay 2, 09:40 UTC17h 40m
2026-05-01 AFL1751 YKS → SVO May 1, 13:20 UTCMay 2, 09:40 UTC20h 21m
2026-04-30 AFL1562 SVO → IKT Apr 30, 01:50 UTCApr 30, 10:40 UTC8h 50m
2026-04-28 AFL1132 SVO → AER Apr 28, 15:10 UTCApr 28, 15:35 UTC25m
2026-04-28 AFL1563 IKT → SVO Apr 28, 08:35 UTCApr 28, 11:55 UTC3h 20m
2026-04-27 AFL1513 SGC → SVO Apr 27, 00:15 UTCApr 27, 05:20 UTC5h 5m
2026-04-26 AFL1461 OVB → SVO Apr 26, 16:05 UTCApr 26, 16:25 UTC20m
2026-04-26 AFL1461 OVB → SVO Apr 26, 12:40 UTCApr 26, 15:30 UTC2h 50m
2026-04-24 AFL1054 SVO → MCX Apr 24, 16:30 UTCApr 24, 16:55 UTC25m
2026-04-23 AFL1751 YKS → SVO Apr 23, 22:15 UTCApr 24, 09:30 UTC11h 15m

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-73101 page for operator, model, and routing details .

Mode-S 151D8D frequently asked

What is Mode-S code 151D8D?
151D8D is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73101.
Where is Mode-S 151D8D registered?
Mode-S code 151D8D is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151D8D broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151D8D, octal 05216615, decimal 1,383,821.
What flights does 151D8D operate?
Mode-S 151D8D has broadcast 20 distinct callsigns, including AFL1454, AFL1455, AFL1751, AFL1461, AFL1444.