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 · 34,950 ft
Flights observed
474
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 22:05 UTC

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 20 distinct

Callsign Airline Flights Last seen
SBI2626 S7 Airlines (Siberia Airlines) 72 2026-07-25
SBI2625 S7 Airlines (Siberia Airlines) 61 2026-07-26
SBI1055 S7 Airlines (Siberia Airlines) 46 2026-07-26
SBI1056 S7 Airlines (Siberia Airlines) 33 2026-07-24
SBI2616 - 29 2026-07-22
SBI2615 - 26 2026-07-21
SBI2145 - 25 2026-06-19
SBI1212 S7 Airlines (Siberia Airlines) 20 2026-07-26
SBI1211 S7 Airlines (Siberia Airlines) 19 2026-07-26
SBI2146 S7 Airlines (Siberia Airlines) 16 2026-06-27
SBI1006 S7 Airlines (Siberia Airlines) 16 2026-06-14
SBI1005 - 16 2026-06-14
SBI2594 S7 Airlines (Siberia Airlines) 15 2026-07-24
SBI2593 S7 Airlines (Siberia Airlines) 11 2026-07-23
SBI2157 S7 Airlines (Siberia Airlines) 10 2026-06-28
SBI1137 S7 Airlines (Siberia Airlines) 9 2026-07-20
SBI1135 - 9 2026-07-21
SBI1138 S7 Airlines (Siberia Airlines) 8 2026-07-21
SBI1136 S7 Airlines (Siberia Airlines) 8 2026-07-23
SBI2158 S7 Airlines (Siberia Airlines) 6 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SBI2625 DME → NOZ Jul 26, 21:25 UTCJul 26, 22:05 UTC40m
2026-07-26 SBI2625 DME → NOZ Jul 26, 20:40 UTCJul 26, 20:55 UTC15m
2026-07-26 SBI1055 DME → KZN Jul 26, 15:35 UTCJul 26, 18:55 UTC3h 20m
2026-07-26 SBI1212 STW → DME Jul 26, 11:40 UTCJul 26, 13:55 UTC2h 15m
2026-07-26 SBI1211 DME → STW Jul 26, 08:00 UTCJul 26, 10:00 UTC2h 0m
2026-07-25 SBI2600 KYZ → DME Jul 25, 19:55 UTCJul 26, 05:55 UTC10h 0m
2026-07-25 SBI2599 DME → KYZ Jul 25, 19:10 UTCJul 25, 19:20 UTC10m
2026-07-25 SBI1212 - Jul 25, 13:15 UTCJul 25, 15:30 UTC2h 15m
2026-07-25 SBI1211 DME → STW Jul 25, 09:40 UTCJul 25, 11:50 UTC2h 10m
2026-07-25 SBI2626 NOZ → DME Jul 25, 07:50 UTCJul 25, 08:20 UTC30m
2026-07-25 SBI2626 NOZ → DME Jul 25, 03:55 UTCJul 25, 07:10 UTC3h 15m
2026-07-24 SBI2625 DME → NOZ Jul 24, 22:10 UTCJul 25, 02:35 UTC4h 25m
2026-07-24 SBI1056 KZN → DME Jul 24, 18:05 UTCJul 24, 19:05 UTC1h 0m
2026-07-24 SBI1055 DME → KZN Jul 24, 15:45 UTCJul 24, 16:30 UTC45m
2026-07-24 SBI1212 - Jul 24, 12:20 UTCJul 24, 14:35 UTC2h 15m
2026-07-24 SBI1211 - Jul 24, 09:00 UTCJul 24, 11:05 UTC2h 5m
2026-07-24 SBI2594 ABA → DME Jul 24, 07:00 UTCJul 24, 07:35 UTC35m
2026-07-24 SBI2594 ABA → DME Jul 24, 02:45 UTCJul 24, 06:20 UTC3h 35m
2026-07-23 SBI2593 DME → ABA Jul 23, 21:20 UTCJul 24, 01:15 UTC3h 55m
2026-07-23 SBI1056 KZN → DME Jul 23, 19:25 UTCJul 23, 19:50 UTC25m
2026-07-23 SBI1056 KZN → DME Jul 23, 18:20 UTCJul 23, 18:30 UTC10m
2026-07-23 SBI1055 DME → KZN Jul 23, 15:40 UTCJul 23, 16:10 UTC30m
2026-07-23 SBI1136 UFA → DME Jul 23, 08:10 UTCJul 23, 12:40 UTC4h 30m
2026-07-23 SBI2594 ABA → DME Jul 23, 00:50 UTCJul 23, 05:10 UTC4h 20m
2026-07-22 SBI2593 - Jul 22, 19:00 UTCJul 22, 23:10 UTC4h 10m
2026-07-22 SBI2158 MCX → DME Jul 22, 16:25 UTCJul 22, 16:40 UTC15m
2026-07-22 SBI2616 - Jul 22, 00:45 UTCJul 22, 04:30 UTC3h 45m
2026-07-21 SBI2615 - Jul 21, 19:40 UTCJul 21, 23:15 UTC3h 35m
2026-07-21 SBI1138 UFA → DME Jul 21, 13:50 UTCJul 21, 18:25 UTC4h 35m
2026-07-21 SBI1135 - Jul 21, 08:05 UTCJul 21, 12:25 UTC4h 20m
2026-07-21 SBI2626 NOZ → DME Jul 21, 02:50 UTCJul 21, 06:55 UTC4h 5m
2026-07-20 SBI2625 DME → NOZ Jul 20, 21:30 UTCJul 21, 01:30 UTC3h 59m
2026-07-20 SBI1138 UFA → DME Jul 20, 16:25 UTCJul 20, 20:15 UTC3h 50m
2026-07-20 SBI1137 DME → UFA Jul 20, 15:25 UTCJul 20, 15:55 UTC30m
2026-07-20 SBI1135 - Jul 20, 09:20 UTCJul 20, 13:50 UTC4h 30m
2026-07-20 SBI2626 - Jul 20, 07:35 UTCJul 20, 07:55 UTC20m
2026-07-20 SBI2626 - Jul 20, 03:45 UTCJul 20, 06:55 UTC3h 10m
2026-07-19 SBI2625 DME → NOZ Jul 19, 21:00 UTCJul 20, 01:50 UTC4h 50m
2026-07-19 SBI1056 KZN → DME Jul 19, 18:30 UTCJul 19, 18:55 UTC25m
2026-07-19 SBI1055 DME → KZN Jul 19, 15:35 UTCJul 19, 16:30 UTC55m
2026-07-19 SBI1212 - Jul 19, 11:40 UTCJul 19, 13:50 UTC2h 10m
2026-07-19 SBI1211 - Jul 19, 08:00 UTCJul 19, 10:10 UTC2h 10m
2026-07-18 SBI2615 - Jul 18, 19:35 UTCJul 19, 04:25 UTC8h 50m
2026-07-18 SBI1137 DME → UFA Jul 18, 13:45 UTCJul 18, 18:05 UTC4h 20m
2026-07-18 SBI1135 - Jul 18, 08:05 UTCJul 18, 12:20 UTC4h 15m
2026-07-18 SBI2626 - Jul 18, 02:00 UTCJul 18, 06:25 UTC4h 26m
2026-07-17 SBI2625 - Jul 17, 20:50 UTCJul 18, 00:35 UTC3h 45m
2026-07-17 SBI1055 DME → KZN Jul 17, 15:44 UTCJul 17, 19:15 UTC3h 30m
2026-07-17 SBI1212 - Jul 17, 11:35 UTCJul 17, 13:45 UTC2h 10m
2026-07-17 SBI1211 - Jul 17, 08:00 UTCJul 17, 10:20 UTC2h 20m

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 20 distinct callsigns, including SBI2626, SBI2625, SBI1055, SBI1056, SBI2616.