Apparatus

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sensors Mode-S transponder

505931

ICAO 24-bit transponder address

Hex
505931
Octal
24054461
Decimal
5,265,713
No current signal · last broadcast 9d ago
Flights observed
22
Distinct callsigns
1
Country
-
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S 505931.

Callsign history 1 distinct

Callsign Airline Flights Last seen
OMM843 - 22 2026-07-25

Recent flights last 22

DateFlightRouteTakeoffLandingDuration
2026-07-25 OMM843 - Jul 25, 15:00 UTCJul 25, 15:55 UTC55m
2026-07-25 OMM843 - Jul 25, 07:50 UTCJul 25, 08:10 UTC20m
2026-07-20 OMM843 - Jul 20, 16:35 UTCJul 20, 17:30 UTC55m
2026-07-19 OMM843 - Jul 19, 14:10 UTCJul 19, 14:20 UTC10m
2026-07-18 OMM843 - Jul 18, 08:35 UTCJul 18, 09:45 UTC1h 10m
2026-07-12 OMM843 - Jul 12, 06:30 UTCJul 12, 07:15 UTC45m
2026-07-11 OMM843 - Jul 11, 15:45 UTCJul 11, 16:25 UTC40m
2026-07-11 OMM843 - Jul 11, 08:30 UTCJul 11, 09:15 UTC45m
2026-06-28 OMM843 - Jun 28, 05:34 UTCJun 28, 06:40 UTC1h 5m
2026-06-27 OMM843 - Jun 27, 10:54 UTCJun 27, 11:35 UTC40m
2026-06-27 OMM843 - Jun 27, 09:15 UTCJun 27, 09:44 UTC30m
2026-06-26 OMM843 - Jun 26, 12:59 UTCJun 26, 13:19 UTC20m
2026-06-26 OMM843 - Jun 26, 06:45 UTCJun 26, 07:14 UTC30m
2026-06-24 OMM843 - Jun 24, 13:44 UTCJun 24, 16:29 UTC2h 45m
2026-06-24 OMM843 - Jun 24, 10:04 UTCJun 24, 10:55 UTC50m
2026-06-24 OMM843 - Jun 24, 07:50 UTCJun 24, 09:00 UTC1h 10m
2026-06-21 OMM843 - Jun 21, 06:14 UTCJun 21, 07:25 UTC1h 10m
2026-06-20 OMM843 - Jun 20, 06:14 UTCJun 20, 07:04 UTC50m
2026-06-19 OMM843 - Jun 19, 14:24 UTCJun 19, 15:14 UTC50m
2026-06-18 OMM843 - Jun 18, 16:35 UTCJun 18, 16:45 UTC10m
2026-06-13 OMM843 - Jun 13, 14:15 UTCJun 13, 14:50 UTC35m
2026-06-13 OMM843 - Jun 13, 09:25 UTCJun 13, 10:30 UTC1h 5m

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 505931 frequently asked

What is Mode-S code 505931?
505931 is an ICAO 24-bit transponder address.
Is 505931 broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 505931, octal 24054461, decimal 5,265,713.
What flights does 505931 operate?
Mode-S 505931 has broadcast 1 distinct callsign, including OMM843.