sensors Mode-S transponder

50591B

ICAO 24-bit transponder address

Hex
50591B
Octal
24054433
Decimal
5,265,691
No current signal · last broadcast 13d ago
Flights observed
19
Distinct callsigns
1
Country
-
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S 50591B.

Callsign history 1 distinct

Callsign Airline Flights Last seen
OMM390 - 19 2026-07-26

Recent flights last 19

DateFlightRouteTakeoffLandingDuration
2026-07-26 OMM390 - Jul 26, 16:40 UTCJul 26, 17:25 UTC45m
2026-07-26 OMM390 - Jul 26, 09:30 UTCJul 26, 10:10 UTC40m
2026-07-25 OMM390 - Jul 25, 16:50 UTCJul 25, 17:50 UTC1h 0m
2026-07-24 OMM390 - Jul 24, 15:35 UTCJul 24, 16:30 UTC55m
2026-07-24 OMM390 - Jul 24, 12:40 UTCJul 24, 13:00 UTC20m
2026-07-24 OMM390 - Jul 24, 11:35 UTCJul 24, 12:00 UTC25m
2026-07-18 OMM390 - Jul 18, 15:25 UTCJul 18, 16:15 UTC50m
2026-07-16 OMM390 - Jul 16, 13:40 UTCJul 16, 13:49 UTC10m
2026-07-14 OMM390 - Jul 14, 13:00 UTCJul 14, 13:10 UTC10m
2026-06-29 OMM390 - Jun 29, 13:30 UTCJun 29, 13:44 UTC15m
2026-06-29 OMM390 - Jun 29, 09:25 UTCJun 29, 11:20 UTC1h 55m
2026-06-26 OMM390 - Jun 26, 12:19 UTCJun 26, 12:50 UTC30m
2026-06-26 OMM390 - Jun 26, 07:35 UTCJun 26, 08:05 UTC30m
2026-06-25 OMM390 - Jun 25, 04:49 UTCJun 25, 07:00 UTC2h 10m
2026-06-24 OMM390 - Jun 24, 12:04 UTCJun 24, 12:40 UTC35m
2026-06-19 OMM390 - Jun 19, 13:29 UTCJun 19, 14:04 UTC35m
2026-06-19 OMM390 - Jun 19, 07:45 UTCJun 19, 08:24 UTC40m
2026-06-14 OMM390 - Jun 14, 12:25 UTCJun 14, 14:05 UTC1h 40m
2026-06-14 OMM390 - Jun 14, 10:00 UTCJun 14, 11:15 UTC1h 15m

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 50591B frequently asked

What is Mode-S code 50591B?
50591B is an ICAO 24-bit transponder address.
Is 50591B broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 50591B, octal 24054433, decimal 5,265,691.
What flights does 50591B operate?
Mode-S 50591B has broadcast 1 distinct callsign, including OMM390.