Apparatus

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sensors Mode-S transponder

151FD9

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73689 · AIRBUS A-321

Hex
151FD9
Octal
05217731
Decimal
1,384,409
Country
RU
Tail
RA-73689
Type
A321
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
213
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S 151FD9.

Country allocation

The ICAO 24-bit address 151FD9 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
SBI5723 S7 Airlines (Siberia Airlines) 44 2026-07-20
SBI5261 S7 Airlines (Siberia Airlines) 33 2026-07-25
SBI5724 S7 Airlines (Siberia Airlines) 23 2026-07-20
SBI5003 - 18 2026-07-15
SBI5262 - 17 2026-06-25
SBI5127 S7 Airlines (Siberia Airlines) 10 2026-06-11
SBI5128 S7 Airlines (Siberia Airlines) 8 2026-07-07
SBI5541 S7 Airlines (Siberia Airlines) 7 2026-07-25
SBI5004 - 7 2026-07-18
SBI5545 - 6 2026-07-19
SBI5551 - 4 2026-06-27
SBI5542 S7 Airlines (Siberia Airlines) 4 2026-07-04
SBI5224 S7 Airlines (Siberia Airlines) 4 2026-07-21
SBI5223 S7 Airlines (Siberia Airlines) 4 2026-07-26
SBI5556 S7 Airlines (Siberia Airlines) 3 2026-07-09
SBI5546 S7 Airlines (Siberia Airlines) 2 2026-07-26
SBI5238 S7 Airlines (Siberia Airlines) 2 2026-04-18
SBI5237 S7 Airlines (Siberia Airlines) 2 2026-05-06
SBI5210 - 2 2026-07-16
SBI5006 S7 Airlines (Siberia Airlines) 2 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SBI5223 OVB → HTA Jul 26, 19:10 UTCJul 26, 19:45 UTC35m
2026-07-26 SBI5546 OSS → OVB Jul 26, 08:45 UTCJul 26, 14:05 UTC5h 20m
2026-07-25 SBI5261 OVB → YKS Jul 25, 17:10 UTCJul 26, 01:40 UTC8h 30m
2026-07-25 SBI5541 OVB → FRU Jul 25, 08:30 UTCJul 25, 12:50 UTC4h 20m
2026-07-24 SBI5261 OVB → YKS Jul 24, 17:05 UTCJul 25, 01:35 UTC8h 30m
2026-07-23 SBI5261 OVB → YKS Jul 23, 17:25 UTCJul 24, 02:00 UTC8h 35m
2026-07-23 SBI5552 DYU → OVB Jul 23, 07:10 UTCJul 23, 13:35 UTC6h 25m
2026-07-21 SBI5224 HTA → OVB Jul 21, 19:00 UTCJul 22, 01:55 UTC6h 55m
2026-07-21 SBI5596 - Jul 21, 12:00 UTCJul 21, 12:25 UTC25m
2026-07-21 SBI5591 OVB → EVN Jul 21, 09:30 UTCJul 21, 09:50 UTC20m
2026-07-20 SBI5724 PKX → OVB Jul 20, 22:30 UTCJul 21, 02:20 UTC3h 50m
2026-07-20 SBI5723 OVB → PKX Jul 20, 20:20 UTCJul 20, 20:35 UTC15m
2026-07-20 SBI5723 OVB → PKX Jul 20, 17:05 UTCJul 20, 17:40 UTC35m
2026-07-19 SBI5261 OVB → YKS Jul 19, 17:30 UTCJul 20, 01:55 UTC8h 25m
2026-07-19 SBI5545 - Jul 19, 08:35 UTCJul 19, 13:50 UTC5h 15m
2026-07-18 SBI5261 OVB → YKS Jul 18, 18:05 UTCJul 19, 02:45 UTC8h 40m
2026-07-18 SBI5004 - Jul 18, 07:40 UTCJul 18, 12:40 UTC5h 0m
2026-07-17 SBI5240 IKT → OVB Jul 17, 15:15 UTCJul 18, 01:34 UTC10h 20m
2026-07-16 SBI5241 - Jul 16, 21:25 UTCJul 17, 04:10 UTC6h 45m
2026-07-16 SBI2506 - Jul 16, 07:15 UTCJul 16, 07:55 UTC40m
2026-07-16 SBI5210 - Jul 16, 02:30 UTCJul 16, 03:05 UTC35m
2026-07-15 SBI5209 OVB → BQS Jul 15, 18:10 UTCJul 15, 18:40 UTC30m
2026-07-15 SBI5003 - Jul 15, 07:40 UTCJul 15, 12:45 UTC5h 5m
2026-07-14 SBI5724 - Jul 14, 22:30 UTCJul 15, 02:35 UTC4h 4m
2026-07-14 SBI5723 - Jul 14, 20:10 UTCJul 14, 20:25 UTC15m
2026-07-14 SBI5723 - Jul 14, 17:05 UTCJul 14, 17:40 UTC35m
2026-07-13 SBI5724 - Jul 13, 22:30 UTCJul 14, 02:30 UTC4h 0m
2026-07-13 SBI5723 - Jul 13, 20:30 UTCJul 13, 20:40 UTC10m
2026-07-13 SBI5723 - Jul 13, 17:20 UTCJul 13, 17:50 UTC30m
2026-07-13 SBI5003 - Jul 13, 07:40 UTCJul 13, 07:55 UTC15m
2026-07-12 SBI5724 - Jul 12, 22:20 UTCJul 13, 02:15 UTC3h 55m
2026-07-12 SBI5723 - Jul 12, 20:05 UTCJul 12, 20:20 UTC15m
2026-07-12 SBI5723 - Jul 12, 16:45 UTCJul 12, 17:20 UTC35m
2026-07-11 SBI5261 OVB → YKS Jul 11, 17:30 UTCJul 12, 01:50 UTC8h 20m
2026-07-11 SBI5541 - Jul 11, 08:35 UTCJul 11, 12:45 UTC4h 10m
2026-07-10 SBI5724 - Jul 10, 22:30 UTCJul 11, 02:25 UTC3h 55m
2026-07-10 SBI5723 - Jul 10, 20:05 UTCJul 10, 20:25 UTC20m
2026-07-10 SBI5723 - Jul 10, 16:45 UTCJul 10, 17:20 UTC35m
2026-07-09 SBI5223 - Jul 9, 20:05 UTCJul 9, 20:40 UTC35m
2026-07-09 SBI5556 LBD → OVB Jul 9, 12:15 UTCJul 9, 17:40 UTC5h 25m
2026-07-07 SBI5724 - Jul 7, 22:30 UTCJul 8, 02:10 UTC3h 40m
2026-07-07 SBI5723 - Jul 7, 20:15 UTCJul 7, 20:25 UTC10m
2026-07-07 SBI5723 - Jul 7, 16:50 UTCJul 7, 17:30 UTC40m
2026-07-07 SBI5128 MRV → OVB Jul 7, 11:00 UTCJul 7, 11:10 UTC10m
2026-07-06 SBI5724 - Jul 6, 22:45 UTCJul 7, 02:25 UTC3h 40m
2026-07-06 SBI5723 - Jul 6, 20:35 UTCJul 6, 20:50 UTC15m
2026-07-06 SBI5723 - Jul 6, 07:35 UTCJul 6, 17:55 UTC10h 20m
2026-07-05 SBI5261 OVB → YKS Jul 5, 17:05 UTCJul 6, 01:35 UTC8h 30m
2026-07-04 SBI5542 FRU → OVB Jul 4, 12:20 UTCJul 5, 07:55 UTC19h 35m
2026-07-04 SBI5541 - Jul 4, 08:30 UTCJul 5, 07:55 UTC23h 25m

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-73689 page for operator, model, and routing details .

Mode-S 151FD9 frequently asked

What is Mode-S code 151FD9?
151FD9 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73689.
Where is Mode-S 151FD9 registered?
Mode-S code 151FD9 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FD9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FD9, octal 05217731, decimal 1,384,409.
What flights does 151FD9 operate?
Mode-S 151FD9 has broadcast 20 distinct callsigns, including SBI5723, SBI5261, SBI5724, SBI5003, SBI5262.