Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

151DA1

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73121 · BOEING 737-800

Hex
151DA1
Octal
05216641
Decimal
1,383,841
Country
RU
Tail
RA-73121
Type
B738
No current signal · last broadcast 2d ago
Flights observed
182
Distinct callsigns
20
Country
RU
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 151DA1.

Country allocation

The ICAO 24-bit address 151DA1 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
AFL909 Aeroflot Russian Airlines 8 2026-05-21
AFL905 - 8 2026-06-21
AFL2149 - 7 2026-06-24
AFL2122 - 7 2026-07-04
AFL913 Aeroflot Russian Airlines 6 2026-05-24
AFL912 Aeroflot Russian Airlines 6 2026-05-24
AFL2146 Aeroflot Russian Airlines 6 2026-05-25
AFL2124 - 6 2026-07-06
AFL2123 - 6 2026-07-04
AFL2121 - 6 2026-07-11
AFL904 - 5 2026-06-20
AFL422 Aeroflot Russian Airlines 5 2026-06-02
AFL2148 Aeroflot Russian Airlines 5 2026-06-11
AFL1865 Aeroflot Russian Airlines 5 2026-06-12
AFL901 - 4 2026-06-20
AFL802 Aeroflot Russian Airlines 4 2026-06-06
AFL426 Aeroflot Russian Airlines 4 2026-05-30
AFL425 Aeroflot Russian Airlines 4 2026-06-08
AFL424 Aeroflot Russian Airlines 4 2026-05-27
AFL2129 Aeroflot Russian Airlines 4 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 AFL2161 - Jul 12, 19:45 UTCJul 12, 20:05 UTC20m
2026-07-12 AFL2160 - Jul 12, 01:25 UTCJul 12, 18:01 UTC16h 35m
2026-07-11 AFL2132 SVO → SVO Jul 11, 18:55 UTCJul 11, 19:20 UTC25m
2026-07-11 AFL2121 - Jul 11, 11:25 UTCJul 11, 12:00 UTC35m
2026-07-11 AFL2120 - Jul 11, 08:05 UTCJul 11, 10:00 UTC1h 55m
2026-07-08 AFL2159 - Jul 8, 15:25 UTCJul 8, 17:10 UTC1h 45m
2026-07-08 AFL2158 - Jul 8, 03:25 UTCJul 8, 13:30 UTC10h 5m
2026-07-07 AFL2127 - Jul 7, 14:45 UTCJul 7, 16:30 UTC1h 45m
2026-07-07 AFL2126 - Jul 7, 12:55 UTCJul 7, 13:30 UTC35m
2026-07-06 AFL2126 - Jul 6, 14:20 UTCJul 7, 13:30 UTC23h 10m
2026-07-06 AFL2125 - Jul 6, 13:15 UTCJul 6, 14:50 UTC1h 35m
2026-07-06 AFL2124 - Jul 6, 09:05 UTCJul 6, 11:30 UTC2h 25m
2026-07-06 AFL2124 SVO → SVO Jul 6, 06:40 UTCJul 6, 07:05 UTC25m
2026-07-05 AFL1867 - Jul 5, 11:40 UTCJul 5, 12:10 UTC30m
2026-07-05 AFL1866 SVO → EVN Jul 5, 06:55 UTCJul 5, 07:25 UTC30m
2026-07-04 AFL2123 - Jul 4, 14:45 UTCJul 4, 16:45 UTC2h 0m
2026-07-04 AFL2122 - Jul 4, 11:30 UTCJul 4, 13:10 UTC1h 40m
2026-07-03 AFL2122 - Jul 3, 16:20 UTCJul 4, 13:10 UTC20h 50m
2026-07-03 AFL2159 - Jul 3, 15:30 UTCJul 4, 13:10 UTC21h 40m
2026-07-02 AFL2158 - Jul 2, 18:25 UTCJul 3, 14:15 UTC19h 50m
2026-07-02 AFL2139 - Jul 2, 06:15 UTCJul 2, 06:30 UTC15m
2026-07-02 AFL2138 - Jul 2, 00:40 UTCJul 2, 01:00 UTC20m
2026-07-01 AFL2137 IST → SVO Jul 1, 13:10 UTCJul 1, 13:40 UTC30m
2026-07-01 AFL2136 - Jul 1, 10:00 UTCJul 1, 10:15 UTC15m
2026-06-30 AFL2157 AYT → SVO Jun 30, 16:10 UTCJun 30, 17:55 UTC1h 45m
2026-06-30 AFL2129 AYT → SVO Jun 30, 03:40 UTCJun 30, 14:45 UTC11h 5m
2026-06-30 AFL2128 SVO → AYT Jun 30, 01:30 UTCJun 30, 02:05 UTC35m
2026-06-28 AFL2129 AYT → SVO Jun 28, 06:44 UTCJun 28, 08:34 UTC1h 50m
2026-06-27 AFL2128 SVO → AYT Jun 27, 16:00 UTCJun 28, 04:29 UTC12h 30m
2026-06-27 AFL2129 AYT → SVO Jun 27, 03:49 UTCJun 27, 14:35 UTC10h 45m
2026-06-26 AFL2121 - Jun 26, 11:14 UTCJun 27, 02:25 UTC15h 10m
2026-06-25 AFL2123 - Jun 25, 14:50 UTCJun 26, 09:55 UTC19h 5m
2026-06-24 AFL2122 - Jun 24, 18:44 UTCJun 25, 13:20 UTC18h 35m
2026-06-24 AFL2149 - Jun 24, 05:54 UTCJun 24, 08:14 UTC2h 20m
2026-06-23 AFL2123 - Jun 23, 14:35 UTCJun 24, 04:20 UTC13h 45m
2026-06-23 AFL2122 - Jun 23, 12:15 UTCJun 23, 12:45 UTC30m
2026-06-23 AFL1967 - Jun 23, 03:04 UTCJun 23, 03:34 UTC30m
2026-06-21 AFL905 - Jun 21, 06:55 UTCJun 21, 14:24 UTC7h 30m
2026-06-20 AFL904 - Jun 20, 10:39 UTCJun 21, 09:24 UTC22h 45m
2026-06-20 AFL901 - Jun 20, 08:55 UTCJun 21, 08:15 UTC23h 20m
2026-06-20 AFL901 - Jun 20, 05:04 UTCJun 20, 11:25 UTC6h 20m
2026-06-19 AFL901 - Jun 19, 12:25 UTCJun 20, 11:25 UTC23h 0m
2026-06-19 AFL905 - Jun 19, 10:50 UTCJun 20, 10:15 UTC23h 25m
2026-06-19 AFL905 - Jun 19, 08:20 UTCJun 20, 06:35 UTC22h 15m
2026-06-19 AFL905 - Jun 19, 06:20 UTCJun 20, 06:14 UTC23h 55m
2026-06-19 AFL904 - Jun 19, 05:40 UTCJun 19, 13:14 UTC7h 35m
2026-06-18 AFL904 - Jun 18, 10:20 UTCJun 19, 08:29 UTC22h 9m
2026-06-18 AFL904 - Jun 18, 09:35 UTCJun 19, 08:14 UTC22h 39m
2026-06-17 AFL900 - Jun 17, 12:20 UTCJun 18, 07:15 UTC18h 55m
2026-06-17 AFL905 - Jun 17, 10:20 UTCJun 18, 07:15 UTC20h 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-73121 page for operator, model, and routing details .

Mode-S 151DA1 frequently asked

What is Mode-S code 151DA1?
151DA1 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73121.
Where is Mode-S 151DA1 registered?
Mode-S code 151DA1 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151DA1 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151DA1, octal 05216641, decimal 1,383,841.
What flights does 151DA1 operate?
Mode-S 151DA1 has broadcast 20 distinct callsigns, including AFL909, AFL905, AFL2149, AFL2122, AFL913.