Apparatus

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sensors Mode-S transponder

123456

ICAO 24-bit transponder address · allocated to Russia

Hex
123456
Octal
04432126
Decimal
1,193,046
Country
RU
Broadcasting now · callsign 2888 · 3,000 ft
Flights observed
342
Distinct callsigns
20
Country
RU
Last broadcast
1h ago

Current position

123456 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 123456 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
GCFTO - 46 2026-07-17
G2411 - 20 2026-07-14
IE755 - 19 2026-07-13
ANX2214 - 17 2026-07-11
ANX2209 - 15 2026-06-19
ANX2218 - 14 2026-06-17
SP SAKE - 13 2026-07-04
ZUSLF - 12 2026-06-27
PHIZZ - 12 2026-06-13
B133Z - 12 2026-06-12
12345678 - 12 2026-06-29
R8752 - 11 2026-07-06
N5444V - 7 2026-07-10
ANX2220 - 7 2026-06-03
00CA6181 - 7 2026-07-01
ZUZED - 6 2026-06-20
ZUTXX - 6 2026-06-10
IX005 - 6 2026-04-27
EOZONO - 6 2026-07-06
3877 - 6 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GCFTO - Jul 17, 04:29 UTCJul 18, 01:30 UTC21h 0m
2026-07-16 GCFTO - Jul 16, 03:30 UTCJul 16, 20:35 UTC17h 5m
2026-07-15 GCFTO - Jul 15, 14:45 UTCJul 15, 16:05 UTC1h 20m
2026-07-14 EHECHICE - Jul 14, 21:15 UTCJul 15, 11:15 UTC13h 59m
2026-07-14 G2411 - Jul 14, 01:35 UTCJul 14, 20:30 UTC18h 55m
2026-07-13 G2411 - Jul 13, 23:35 UTCJul 14, 20:30 UTC20h 55m
2026-07-13 G2411 - Jul 13, 21:35 UTCJul 14, 20:30 UTC22h 55m
2026-07-13 G2411 - Jul 13, 19:35 UTCJul 14, 19:30 UTC23h 55m
2026-07-13 G2411 - Jul 13, 17:35 UTCJul 14, 17:30 UTC23h 55m
2026-07-13 G2411 - Jul 13, 15:35 UTCJul 14, 15:30 UTC23h 55m
2026-07-13 G2411 - Jul 13, 13:35 UTCJul 14, 13:30 UTC23h 55m
2026-07-13 G2411 - Jul 13, 11:35 UTCJul 14, 11:30 UTC23h 55m
2026-07-13 G2411 - Jul 13, 09:35 UTCJul 14, 09:30 UTC23h 55m
2026-07-13 G2411 - Jul 13, 07:35 UTCJul 14, 07:10 UTC23h 35m
2026-07-13 G2411 - Jul 13, 05:35 UTCJul 14, 05:30 UTC23h 55m
2026-07-13 G2411 - Jul 13, 03:40 UTCJul 14, 03:30 UTC23h 50m
2026-07-13 IE755 - Jul 13, 01:35 UTCJul 14, 01:30 UTC23h 55m
2026-07-12 IE755 - Jul 12, 23:35 UTCJul 13, 23:30 UTC23h 55m
2026-07-12 IE755 - Jul 12, 22:45 UTCJul 13, 21:30 UTC22h 45m
2026-07-12 IE755 - Jul 12, 01:35 UTCJul 12, 20:35 UTC19h 0m
2026-07-11 IE755 - Jul 11, 23:35 UTCJul 12, 20:35 UTC21h 0m
2026-07-11 IE755 - Jul 11, 21:35 UTCJul 12, 20:35 UTC23h 0m
2026-07-11 IE755 - Jul 11, 19:35 UTCJul 12, 19:30 UTC23h 55m
2026-07-11 IE755 - Jul 11, 17:35 UTCJul 12, 17:30 UTC23h 55m
2026-07-11 IE755 - Jul 11, 15:35 UTCJul 12, 15:30 UTC23h 55m
2026-07-11 ANX2214 - Jul 11, 13:35 UTCJul 12, 13:30 UTC23h 55m
2026-07-11 ANX2214 - Jul 11, 11:35 UTCJul 12, 11:30 UTC23h 55m
2026-07-11 ANX2214 - Jul 11, 09:35 UTCJul 12, 09:30 UTC23h 55m
2026-07-11 ANX2214 - Jul 11, 08:15 UTCJul 12, 07:31 UTC23h 15m
2026-07-10 N5444V - Jul 10, 11:35 UTCJul 11, 07:15 UTC19h 40m
2026-07-10 N5444V - Jul 10, 09:35 UTCJul 11, 07:15 UTC21h 40m
2026-07-10 N5444V - Jul 10, 07:35 UTCJul 11, 07:15 UTC23h 40m
2026-07-10 N5444V - Jul 10, 05:35 UTCJul 11, 05:31 UTC23h 55m
2026-07-10 GCFTO - Jul 10, 03:35 UTCJul 11, 03:30 UTC23h 55m
2026-07-10 GCFTO - Jul 10, 03:20 UTCJul 11, 01:30 UTC22h 10m
2026-07-09 GCFTO - Jul 9, 01:35 UTCJul 9, 20:30 UTC18h 55m
2026-07-08 GCFTO - Jul 8, 23:35 UTCJul 9, 20:30 UTC20h 55m
2026-07-08 GCFTO - Jul 8, 21:35 UTCJul 9, 20:30 UTC22h 55m
2026-07-08 GCFTO - Jul 8, 19:35 UTCJul 9, 19:30 UTC23h 55m
2026-07-08 GCFTO - Jul 8, 17:35 UTCJul 9, 17:30 UTC23h 55m
2026-07-08 GCFTO - Jul 8, 15:35 UTCJul 9, 15:30 UTC23h 55m
2026-07-08 15AAAAAA - Jul 8, 11:35 UTCJul 9, 11:30 UTC23h 55m
2026-07-08 15AAAAAA - Jul 8, 09:35 UTCJul 9, 09:30 UTC23h 55m
2026-07-08 15AAAAAA - Jul 8, 08:50 UTCJul 9, 07:30 UTC22h 40m
2026-07-07 - - Jul 7, 23:20 UTCJul 8, 08:15 UTC8h 55m
2026-07-07 GCFTO - Jul 7, 03:00 UTCJul 7, 20:35 UTC17h 35m
2026-07-06 EOZONO - Jul 6, 20:50 UTCJul 6, 21:20 UTC30m
2026-07-06 EOZONO - Jul 6, 11:50 UTCJul 6, 14:40 UTC2h 50m
2026-07-06 R8752 - Jul 6, 04:10 UTCJul 6, 04:25 UTC15m
2026-07-05 R8752 - Jul 5, 22:45 UTCJul 6, 03:05 UTC4h 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.

Mode-S 123456 frequently asked

What is Mode-S code 123456?
123456 is an ICAO 24-bit transponder address. Allocated to Russia.
Where is Mode-S 123456 registered?
Mode-S code 123456 is allocated to Russia (RU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 123456 broadcasting right now?
Yes. Mode-S 123456 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 123456, octal 04432126, decimal 1,193,046.
What flights does 123456 operate?
Mode-S 123456 has broadcast 20 distinct callsigns, including GCFTO, G2411, IE755, ANX2214, ANX2209.