Apparatus

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sensors Mode-S transponder

155C56

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-89174 · SUKHOI Superjet 100-95

Hex
155C56
Octal
05256126
Decimal
1,399,894
Country
RU
Tail
RA-89174
Type
SU95
No current signal · last broadcast 1h ago
Flights observed
70
Distinct callsigns
20
Country
RU
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 155C56.

Country allocation

The ICAO 24-bit address 155C56 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
SDM6913 Rossiya - Russian Airlines 5 2026-05-04
SDM6882 Rossiya - Russian Airlines 5 2026-05-03
SDM6881 Rossiya - Russian Airlines 3 2026-05-03
SDM6842 Rossiya - Russian Airlines 3 2026-04-27
SDM6677 Rossiya - Russian Airlines 3 2026-05-02
SDM6446 Rossiya - Russian Airlines 3 2026-06-10
SDM6329 Rossiya - Russian Airlines 3 2026-06-11
SDM6993 Rossiya - Russian Airlines 2 2026-06-01
SDM6845 Rossiya - Russian Airlines 2 2026-04-22
SDM6841 Rossiya - Russian Airlines 2 2026-04-27
SDM6799 Rossiya - Russian Airlines 2 2026-05-05
SDM6792 Rossiya - Russian Airlines 2 2026-04-24
SDM6791 Rossiya - Russian Airlines 2 2026-04-30
SDM6722 Rossiya - Russian Airlines 2 2026-04-23
SDM6346 - 2 2026-06-27
SDM6330 Rossiya - Russian Airlines 2 2026-05-24
SDM6327 - 2 2026-07-07
SDM6950 Rossiya - Russian Airlines 1 2026-06-24
SDM6949 Rossiya - Russian Airlines 1 2026-06-24
SDM6885 Rossiya - Russian Airlines 1 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SDM5726 - Jul 14, 08:15 UTCJul 14, 16:00 UTC7h 45m
2026-07-13 SDM5716 - Jul 13, 12:15 UTCJul 14, 08:35 UTC20h 20m
2026-07-07 SDM6327 - Jul 7, 00:55 UTCJul 7, 01:30 UTC35m
2026-07-04 SDM6584 - Jul 4, 14:30 UTCJul 4, 14:40 UTC10m
2026-07-03 SDM6586 - Jul 3, 05:10 UTCJul 3, 06:05 UTC55m
2026-07-02 SDM6336 - Jul 2, 15:05 UTCJul 2, 16:15 UTC1h 10m
2026-07-02 SDM6335 - Jul 2, 12:40 UTCJul 2, 13:25 UTC45m
2026-07-01 SDM6395 - Jul 1, 12:20 UTCJul 1, 12:30 UTC10m
2026-06-30 SDM6321 - Jun 30, 09:25 UTCJun 30, 10:10 UTC45m
2026-06-28 SDM6344 - Jun 28, 03:14 UTCJun 28, 03:29 UTC15m
2026-06-27 SDM6346 - Jun 27, 16:20 UTCJun 27, 20:14 UTC3h 55m
2026-06-25 SDM6768 - Jun 25, 10:09 UTCJun 25, 10:25 UTC15m
2026-06-24 SDM6950 EVN → KUF Jun 24, 16:54 UTCJun 24, 17:20 UTC25m
2026-06-24 SDM6949 KUF → EVN Jun 24, 14:50 UTCJun 24, 15:35 UTC45m
2026-06-17 SDM6342 - Jun 17, 06:35 UTCJun 17, 06:50 UTC15m
2026-06-11 SDM6329 LED → KGD Jun 11, 14:20 UTCJun 11, 15:50 UTC1h 30m
2026-06-11 SDM6322 KGD → LED Jun 11, 11:15 UTCJun 11, 12:15 UTC1h 0m
2026-06-10 SDM6446 KVK → LED Jun 10, 12:00 UTCJun 11, 11:30 UTC23h 30m
2026-06-10 SDM6446 KVK → LED Jun 10, 09:30 UTCJun 10, 12:55 UTC3h 25m
2026-06-01 SDM6993 SVO → ARH Jun 1, 17:20 UTCJun 1, 17:35 UTC15m
2026-05-31 SDM6381 SVO → IJK May 31, 08:35 UTCMay 31, 08:50 UTC15m
2026-05-30 SDM6993 SVO → ARH May 30, 16:00 UTCMay 30, 16:20 UTC20m
2026-05-29 SDM6885 SVO → IJK May 29, 18:30 UTCMay 29, 18:55 UTC25m
2026-05-29 SDM6375 SVO → IJK May 29, 10:15 UTCMay 29, 10:35 UTC20m
2026-05-26 SDM6235 SVO → GOJ May 26, 17:55 UTCMay 26, 18:19 UTC25m
2026-05-24 SDM6330 KGD → LED May 24, 17:10 UTCMay 24, 18:20 UTC1h 10m
2026-05-24 SDM6329 LED → KGD May 24, 14:35 UTCMay 24, 15:20 UTC45m
2026-05-21 SDM6330 KGD → LED May 21, 18:45 UTCMay 21, 20:20 UTC1h 35m
2026-05-21 SDM6329 LED → KGD May 21, 14:45 UTCMay 21, 15:25 UTC40m
2026-05-14 SDM6396 MMK → LED May 14, 02:25 UTCMay 14, 14:20 UTC11h 55m
2026-05-13 SDM6346 MMK → LED May 13, 04:10 UTCMay 13, 18:10 UTC14h 0m
2026-05-09 SDM6327 LED → KGD May 9, 20:44 UTCMay 9, 21:14 UTC30m
2026-05-08 SDM6446 KVK → LED May 8, 09:14 UTCMay 8, 12:34 UTC3h 20m
2026-05-05 SDM6799 KJA → SVX May 5, 15:01 UTCMay 5, 15:45 UTC45m
2026-05-04 SDM6799 KJA → SVX May 4, 20:00 UTCMay 5, 15:45 UTC19h 45m
2026-05-04 SDM6913 KJA → CEK May 4, 14:45 UTCMay 4, 20:40 UTC5h 56m
2026-05-03 SDM6913 KJA → CEK May 3, 20:00 UTCMay 4, 15:30 UTC19h 30m
2026-05-03 SDM6913 KJA → CEK May 3, 14:40 UTCMay 3, 20:40 UTC6h 0m
2026-05-03 SDM6882 IKT → KJA May 3, 07:25 UTCMay 3, 07:40 UTC15m
2026-05-03 SDM6881 KJA → IKT May 3, 05:45 UTCMay 3, 06:05 UTC20m
2026-05-02 SDM6688 IKT → KJA May 2, 18:20 UTCMay 2, 18:30 UTC10m
2026-05-02 SDM6677 KJA → IKT May 2, 17:00 UTCMay 2, 17:10 UTC10m
2026-04-30 SDM6791 KJA → SVX Apr 30, 09:25 UTCMay 1, 02:15 UTC16h 50m
2026-04-29 SDM6677 KJA → IKT Apr 29, 15:50 UTCApr 29, 16:05 UTC15m
2026-04-28 SDM6635 KJA → HRB Apr 28, 14:10 UTCApr 29, 06:35 UTC16h 25m
2026-04-27 SDM6842 SGC → KJA Apr 27, 20:20 UTCApr 28, 14:15 UTC17h 55m
2026-04-27 SDM6841 KJA → SGC Apr 27, 16:10 UTCApr 28, 14:15 UTC22h 5m
2026-04-27 SDM6841 KJA → SGC Apr 27, 07:10 UTCApr 27, 20:50 UTC13h 40m
2026-04-27 SDM6882 IKT → KJA Apr 27, 03:10 UTCApr 27, 03:30 UTC20m
2026-04-26 SDM6913 KJA → CEK Apr 26, 14:40 UTCApr 27, 01:20 UTC10h 40m

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-89174 page for operator, model, and routing details .

Mode-S 155C56 frequently asked

What is Mode-S code 155C56?
155C56 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-89174.
Where is Mode-S 155C56 registered?
Mode-S code 155C56 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 155C56 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 155C56, octal 05256126, decimal 1,399,894.
What flights does 155C56 operate?
Mode-S 155C56 has broadcast 20 distinct callsigns, including SDM6913, SDM6882, SDM6881, SDM6842, SDM6677.