Apparatus

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sensors Mode-S transponder

155C55

ICAO 24-bit transponder address · allocated to Russia

Currently assigned to RA-89173 · SUKHOI Superjet 100-95

Hex
155C55
Octal
05256125
Decimal
1,399,893
Country
RU
Tail
RA-89173
Type
SU95
No current signal · last broadcast 6h ago
Flights observed
79
Distinct callsigns
20
Country
RU
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 155C55.

Country allocation

The ICAO 24-bit address 155C55 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
SDM6845 Rossiya - Russian Airlines 7 2026-05-08
SDM6882 Rossiya - Russian Airlines 6 2026-05-10
SDM6881 Rossiya - Russian Airlines 6 2026-05-10
SDM6843 Rossiya - Russian Airlines 6 2026-04-27
SDM6841 Rossiya - Russian Airlines 3 2026-05-07
SDM6799 - 3 2026-06-30
SDM6792 - 3 2026-06-26
SDM6846 Rossiya - Russian Airlines 2 2026-06-17
SDM6844 - 2 2026-04-16
SDM6821 Rossiya - Russian Airlines 2 2026-06-14
SDM6796 Rossiya - Russian Airlines 2 2026-06-18
SDM6795 - 2 2026-06-17
SDM6336 - 2 2026-07-09
SDM6330 - 2 2026-07-13
SDM6329 - 2 2026-07-13
SDM6323 - 2 2026-07-09
SDM7003 Rossiya - Russian Airlines 1 2026-04-15
SDM6950 Rossiya - Russian Airlines 1 2026-06-05
SDM6949 Rossiya - Russian Airlines 1 2026-06-05
SDM6914 - 1 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SDM6588 - Jul 14, 02:35 UTCJul 14, 03:20 UTC45m
2026-07-13 SDM6330 - Jul 13, 17:15 UTCJul 13, 18:10 UTC55m
2026-07-13 SDM6329 - Jul 13, 15:05 UTCJul 13, 15:40 UTC35m
2026-07-12 SDM6322 - Jul 12, 11:35 UTCJul 12, 12:40 UTC1h 5m
2026-07-12 SDM6321 - Jul 12, 09:15 UTCJul 12, 09:45 UTC30m
2026-07-09 SDM6336 - Jul 9, 15:15 UTCJul 9, 16:20 UTC1h 5m
2026-07-09 SDM6335 - Jul 9, 12:50 UTCJul 9, 13:15 UTC25m
2026-07-09 SDM6323 - Jul 9, 06:35 UTCJul 9, 07:00 UTC25m
2026-07-07 SDM6336 - Jul 7, 15:15 UTCJul 7, 16:20 UTC1h 5m
2026-07-06 SDM6444 - Jul 6, 19:55 UTCJul 7, 13:25 UTC17h 30m
2026-07-05 SDM6324 - Jul 5, 09:10 UTCJul 5, 10:20 UTC1h 10m
2026-07-05 SDM6323 - Jul 5, 06:35 UTCJul 5, 07:05 UTC30m
2026-07-02 SDM6395 - Jul 2, 10:20 UTCJul 2, 10:30 UTC10m
2026-07-01 SDM6599 LED → LED Jul 1, 16:15 UTCJul 1, 16:35 UTC20m
2026-07-01 SDM6445 - Jul 1, 08:50 UTCJul 1, 13:00 UTC4h 10m
2026-06-30 SDM6799 - Jun 30, 15:15 UTCJun 30, 15:50 UTC35m
2026-06-29 SDM6799 - Jun 29, 20:19 UTCJun 30, 15:50 UTC19h 31m
2026-06-29 SDM6842 - Jun 29, 16:29 UTCJun 30, 15:15 UTC22h 46m
2026-06-28 SDM6914 - Jun 28, 20:29 UTCJun 29, 16:35 UTC20h 5m
2026-06-28 SDM6913 - Jun 28, 07:20 UTCJun 28, 21:04 UTC13h 45m
2026-06-26 SDM6792 - Jun 26, 11:14 UTCJun 26, 11:49 UTC35m
2026-06-25 SDM6792 - Jun 25, 14:44 UTCJun 26, 09:10 UTC18h 25m
2026-06-19 SDM6792 - Jun 19, 07:49 UTCJun 19, 08:29 UTC40m
2026-06-18 SDM6796 FRU → KJA Jun 18, 15:55 UTCJun 19, 02:39 UTC10h 44m
2026-06-17 SDM6795 - Jun 17, 21:20 UTCJun 18, 21:15 UTC23h 55m
2026-06-17 SDM6795 - Jun 17, 21:00 UTCJun 18, 17:15 UTC20h 15m
2026-06-17 SDM6846 OMS → KJA Jun 17, 09:15 UTCJun 17, 21:40 UTC12h 25m
2026-06-14 SDM6821 KJA → TJM Jun 14, 07:00 UTCJun 14, 20:55 UTC13h 55m
2026-06-11 SDM6791 KJA → SVX Jun 11, 23:45 UTCJun 12, 05:35 UTC5h 51m
2026-06-09 SDM6403 LED → SVX Jun 9, 15:10 UTCJun 9, 22:10 UTC7h 0m
2026-06-08 SDM6396 MMK → LED Jun 8, 13:20 UTCJun 8, 14:15 UTC55m
2026-06-06 SDM6345 LED → MMK Jun 6, 22:20 UTCJun 7, 14:15 UTC15h 55m
2026-06-05 SDM6950 EVN → KUF Jun 5, 17:15 UTCJun 5, 18:15 UTC1h 0m
2026-06-05 SDM6949 KUF → EVN Jun 5, 15:20 UTCJun 5, 15:30 UTC10m
2026-06-03 SDM6344 MMK → LED Jun 3, 07:10 UTCJun 3, 08:05 UTC55m
2026-05-25 SDM6334 KGD → LED May 25, 06:40 UTCMay 25, 07:40 UTC1h 0m
2026-05-17 SDM6342 MMK → LED May 17, 07:05 UTCMay 17, 14:10 UTC7h 5m
2026-05-13 SDM6330 KGD → LED May 13, 17:40 UTCMay 13, 18:25 UTC45m
2026-05-13 SDM6329 LED → KGD May 13, 15:00 UTCMay 13, 15:45 UTC45m
2026-05-12 SDM6404 SVX → LED May 12, 19:05 UTCMay 13, 15:45 UTC20h 40m
2026-05-12 SDM6799 KJA → SVX May 12, 15:10 UTCMay 12, 15:50 UTC40m
2026-05-11 SDM6677 KJA → IKT May 11, 15:35 UTCMay 11, 15:55 UTC20m
2026-05-10 SDM6882 IKT → KJA May 10, 04:29 UTCMay 10, 04:45 UTC15m
2026-05-10 SDM6881 KJA → IKT May 10, 02:34 UTCMay 10, 02:55 UTC20m
2026-05-08 SDM6845 KJA → OMS May 8, 09:09 UTCMay 8, 13:25 UTC4h 15m
2026-05-08 SDM6882 IKT → KJA May 8, 04:34 UTCMay 8, 04:44 UTC10m
2026-05-07 SDM6841 KJA → SGC May 7, 16:10 UTCMay 8, 02:55 UTC10h 45m
2026-05-07 SDM6841 KJA → SGC May 7, 04:25 UTCMay 8, 02:55 UTC22h 30m
2026-05-07 SDM6881 KJA → IKT May 7, 02:35 UTCMay 7, 02:50 UTC15m
2026-05-06 SDM6845 KJA → OMS May 6, 09:05 UTCMay 6, 21:35 UTC12h 29m

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-89173 page for operator, model, and routing details .

Mode-S 155C55 frequently asked

What is Mode-S code 155C55?
155C55 is an ICAO 24-bit transponder address. Allocated to Russia. Assigned to RA-89173.
Where is Mode-S 155C55 registered?
Mode-S code 155C55 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 155C55 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 155C55, octal 05256125, decimal 1,399,893.
What flights does 155C55 operate?
Mode-S 155C55 has broadcast 20 distinct callsigns, including SDM6845, SDM6882, SDM6881, SDM6843, SDM6841.