Apparatus

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sensors Mode-S transponder

151FDD

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-73693 · AIRBUS A-321

Hex
151FDD
Octal
05217735
Decimal
1,384,413
Country
RU
Tail
RA-73693
Type
A321
No current signal · last broadcast Jul 26, 19:10 UTC
Flights observed
196
Distinct callsigns
20
Country
RU
Last broadcast
Jul 26, 19:10 UTC

Last known position

Most recent position reported by Mode-S 151FDD.

Country allocation

The ICAO 24-bit address 151FDD 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
SBI5003 S7 Airlines (Siberia Airlines) 37 2026-07-25
SBI5262 S7 Airlines (Siberia Airlines) 25 2026-07-23
SBI5723 - 24 2026-07-18
SBI5004 S7 Airlines (Siberia Airlines) 22 2026-07-25
SBI5724 - 18 2026-07-19
SBI5127 S7 Airlines (Siberia Airlines) 14 2026-06-13
SBI5261 S7 Airlines (Siberia Airlines) 10 2026-07-08
SBI5545 - 6 2026-06-19
SBI5128 S7 Airlines (Siberia Airlines) 5 2026-07-04
SBI5541 - 3 2026-07-02
SBI5224 - 3 2026-07-20
SBI5210 - 3 2026-06-27
SBI5209 S7 Airlines (Siberia Airlines) 3 2026-07-05
SBI5565 S7 Airlines (Siberia Airlines) 2 2026-04-13
SBI5546 S7 Airlines (Siberia Airlines) 2 2026-06-21
SBI5233 S7 Airlines (Siberia Airlines) 2 2026-04-27
SBI7033 - 1 2026-04-28
SBI5566 - 1 2026-04-13
SBI5555 S7 Airlines (Siberia Airlines) 1 2026-04-25
SBI5551 S7 Airlines (Siberia Airlines) 1 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SBI5263 OVB → YKS Jul 26, 18:35 UTCJul 26, 19:10 UTC35m
2026-07-25 SBI5004 LED → OVB Jul 25, 11:05 UTCJul 25, 11:20 UTC15m
2026-07-25 SBI5003 OVB → LED Jul 25, 08:00 UTCJul 25, 08:25 UTC25m
2026-07-24 SBI5003 OVB → LED Jul 24, 12:40 UTCJul 25, 08:25 UTC19h 45m
2026-07-23 SBI5003 OVB → LED Jul 23, 19:10 UTCJul 24, 12:45 UTC17h 35m
2026-07-23 SBI5262 YKS → OVB Jul 23, 01:35 UTCJul 23, 19:35 UTC18h 0m
2026-07-22 SBI5262 YKS → OVB Jul 22, 18:00 UTCJul 23, 07:35 UTC13h 35m
2026-07-22 SBI5262 YKS → OVB Jul 22, 12:25 UTCJul 23, 07:35 UTC19h 10m
2026-07-21 SBI5262 YKS → OVB Jul 21, 17:10 UTCJul 22, 01:30 UTC8h 20m
2026-07-20 SBI5224 - Jul 20, 19:05 UTCJul 21, 12:35 UTC17h 29m
2026-07-20 SBI5224 - Jul 20, 12:20 UTCJul 21, 07:55 UTC19h 34m
2026-07-20 SBI5004 - Jul 20, 11:00 UTCJul 20, 11:15 UTC15m
2026-07-20 SBI5003 - Jul 20, 07:40 UTCJul 20, 08:10 UTC30m
2026-07-19 SBI5003 - Jul 19, 12:55 UTCJul 20, 08:10 UTC19h 15m
2026-07-19 SBI5004 - Jul 19, 11:35 UTCJul 19, 11:45 UTC10m
2026-07-19 SBI5003 - Jul 19, 08:15 UTCJul 19, 08:35 UTC20m
2026-07-19 SBI5724 - Jul 19, 00:10 UTCJul 19, 04:00 UTC3h 50m
2026-07-18 SBI5723 - Jul 18, 19:00 UTCJul 18, 22:20 UTC3h 20m
2026-07-17 SBI5003 - Jul 17, 07:30 UTCJul 17, 08:54 UTC1h 25m
2026-07-16 SBI5003 - Jul 16, 12:20 UTCJul 17, 08:54 UTC20h 35m
2026-07-15 SBI5003 - Jul 15, 19:10 UTCJul 16, 12:44 UTC17h 35m
2026-07-15 SBI5003 - Jul 15, 14:40 UTCJul 16, 12:44 UTC22h 5m
2026-07-15 SBI5006 LED → OVB Jul 15, 13:10 UTCJul 15, 13:25 UTC15m
2026-07-15 SBI5005 - Jul 15, 09:50 UTCJul 15, 10:15 UTC25m
2026-07-12 SBI5211 - Jul 12, 22:00 UTCJul 13, 07:25 UTC9h 25m
2026-07-12 SBI5007 OVB → LED Jul 12, 13:35 UTCJul 12, 14:15 UTC40m
2026-07-11 SBI5004 - Jul 11, 11:00 UTCJul 11, 11:25 UTC25m
2026-07-11 SBI5003 - Jul 11, 08:55 UTCJul 11, 09:10 UTC15m
2026-07-11 SBI5003 - Jul 11, 07:50 UTCJul 11, 08:05 UTC15m
2026-07-10 SBI5262 - Jul 10, 17:35 UTCJul 11, 01:40 UTC8h 5m
2026-07-09 SBI5724 - Jul 9, 22:30 UTCJul 10, 02:25 UTC3h 55m
2026-07-09 SBI5723 - Jul 9, 20:10 UTCJul 9, 20:20 UTC10m
2026-07-09 SBI5723 - Jul 9, 17:00 UTCJul 9, 17:35 UTC35m
2026-07-09 SBI5003 - Jul 9, 07:55 UTCJul 9, 11:25 UTC3h 30m
2026-07-08 SBI5261 OVB → YKS Jul 8, 17:20 UTCJul 9, 01:30 UTC8h 10m
2026-07-07 SBI5262 - Jul 7, 17:25 UTCJul 8, 01:40 UTC8h 15m
2026-07-06 SBI5262 - Jul 6, 17:40 UTCJul 7, 01:45 UTC8h 5m
2026-07-06 SBI5004 - Jul 6, 11:25 UTCJul 6, 11:35 UTC10m
2026-07-06 SBI5003 - Jul 6, 09:35 UTCJul 6, 09:45 UTC10m
2026-07-06 SBI5003 - Jul 6, 08:15 UTCJul 6, 08:40 UTC25m
2026-07-05 SBI5209 OVB → BQS Jul 5, 17:55 UTCJul 5, 18:35 UTC40m
2026-07-04 SBI5262 - Jul 4, 17:15 UTCJul 5, 01:40 UTC8h 25m
2026-07-04 SBI5128 MRV → OVB Jul 4, 11:05 UTCJul 4, 11:15 UTC10m
2026-07-03 SBI5209 OVB → BQS Jul 3, 17:55 UTCJul 4, 03:00 UTC9h 5m
2026-07-03 SBI5003 - Jul 3, 07:40 UTCJul 3, 08:05 UTC25m
2026-07-02 SBI5724 - Jul 2, 22:35 UTCJul 3, 02:40 UTC4h 5m
2026-07-02 SBI5723 - Jul 2, 20:10 UTCJul 2, 20:25 UTC15m
2026-07-02 SBI5723 - Jul 2, 17:05 UTCJul 2, 17:40 UTC35m
2026-07-02 SBI5541 - Jul 2, 08:35 UTCJul 2, 13:00 UTC4h 25m
2026-07-01 SBI5724 - Jul 1, 22:30 UTCJul 2, 02:30 UTC4h 0m

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-73693 page for operator, model, and routing details .

Mode-S 151FDD frequently asked

What is Mode-S code 151FDD?
151FDD is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-73693.
Where is Mode-S 151FDD registered?
Mode-S code 151FDD is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 151FDD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 151FDD, octal 05217735, decimal 1,384,413.
What flights does 151FDD operate?
Mode-S 151FDD has broadcast 20 distinct callsigns, including SBI5003, SBI5262, SBI5723, SBI5004, SBI5724.