Apparatus

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sensors Mode-S transponder

151FD1

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73681 · AIRBUS A-319

Hex
151FD1
Octal
05217721
Decimal
1,384,401
Country
RU
Tail
RA-73681
Type
A319
Broadcasting now · callsign SBI2615 · 6,400 ft
Flights observed
15
Distinct callsigns
6
Country
RU
Last broadcast
13h ago

Current position

151FD1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 151FD1 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 6 distinct

Callsign Airline Flights Last seen
SBI2626 - 5 2026-04-14
SBI2145 S7 Airlines (Siberia Airlines) 3 2026-04-14
SBI1056 - 3 2026-04-13
SBI2625 - 2 2026-04-13
SBI2146 - 1 2026-04-13
SBI1055 - 1 2026-04-13

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 SBI2145 DME → VOG Apr 14, 09:10 UTCApr 14, 09:20 UTC10m
2026-04-14 SBI2145 DME → VOG Apr 14, 08:30 UTCApr 14, 09:05 UTC35m
2026-04-14 SBI2626 - Apr 14, 05:15 UTCApr 14, 06:15 UTC1h 0m
2026-04-13 SBI2625 - Apr 13, 20:30 UTCApr 13, 23:40 UTC3h 10m
2026-04-13 SBI1056 - Apr 13, 18:30 UTCApr 13, 19:00 UTC30m
2026-04-13 SBI1056 - Apr 13, 15:50 UTCApr 13, 19:00 UTC3h 10m
2026-04-13 SBI1055 - Apr 13, 15:35 UTCApr 13, 15:50 UTC15m
2026-04-13 SBI2146 - Apr 13, 12:05 UTCApr 13, 12:25 UTC20m
2026-04-13 SBI2145 DME → VOG Apr 13, 08:40 UTCApr 13, 12:15 UTC3h 35m
2026-04-13 SBI2626 - Apr 13, 06:00 UTCApr 13, 06:20 UTC19m
2026-04-13 SBI2626 - Apr 13, 04:40 UTCApr 13, 05:30 UTC50m
2026-04-13 SBI2626 - Apr 13, 04:10 UTCApr 13, 05:30 UTC1h 20m
2026-04-13 SBI2626 - Apr 13, 01:50 UTCApr 13, 04:15 UTC2h 25m
2026-04-12 SBI2625 - Apr 12, 23:55 UTCApr 13, 00:10 UTC15m
2026-04-12 SBI1056 - Apr 12, 18:25 UTCApr 12, 18:50 UTC25m

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-73681 page for operator, model, and routing details .

Mode-S 151FD1 frequently asked

What is Mode-S code 151FD1?
151FD1 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73681.
Where is Mode-S 151FD1 registered?
Mode-S code 151FD1 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FD1 broadcasting right now?
Yes. Mode-S 151FD1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FD1, octal 05217721, decimal 1,384,401.
What flights does 151FD1 operate?
Mode-S 151FD1 has broadcast 6 distinct callsigns, including SBI2626, SBI2145, SBI1056, SBI2625, SBI2146.