Apparatus

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sensors Mode-S transponder

0091EF

ICAO 24-bit transponder address · allocated to South Africa

Hex
0091EF
Octal
00110757
Decimal
37,359
Country
ZA
No current signal · last broadcast 7d ago
Flights observed
98
Distinct callsigns
1
Country
ZA
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 0091EF.

Country allocation

The ICAO 24-bit address 0091EF falls within the block assigned to South Africa (ZA) by ICAO Annex 10, Volume III. Every aircraft registered in South Africa 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 1 distinct

Callsign Airline Flights Last seen
ZSSUJ - 98 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 ZSSUJ - Jul 20, 13:10 UTCJul 20, 13:35 UTC25m
2026-07-19 ZSSUJ - Jul 19, 12:35 UTCJul 19, 13:15 UTC40m
2026-07-19 ZSSUJ - Jul 19, 11:40 UTCJul 19, 12:00 UTC20m
2026-07-19 ZSSUJ - Jul 19, 08:45 UTCJul 19, 09:20 UTC35m
2026-07-18 ZSSUJ - Jul 18, 10:15 UTCJul 18, 10:55 UTC40m
2026-07-18 ZSSUJ - Jul 18, 06:55 UTCJul 18, 07:05 UTC10m
2026-07-16 ZSSUJ - Jul 16, 13:05 UTCJul 16, 13:25 UTC20m
2026-07-16 ZSSUJ - Jul 16, 11:30 UTCJul 16, 11:45 UTC15m
2026-07-15 ZSSUJ - Jul 15, 14:05 UTCJul 15, 14:45 UTC40m
2026-07-15 ZSSUJ - Jul 15, 12:15 UTCJul 15, 13:05 UTC50m
2026-07-13 ZSSUJ - Jul 13, 08:01 UTCJul 13, 08:35 UTC35m
2026-07-12 ZSSUJ - Jul 12, 09:50 UTCJul 12, 10:35 UTC45m
2026-07-10 ZSSUJ - Jul 10, 12:55 UTCJul 10, 14:05 UTC1h 10m
2026-07-09 ZSSUJ - Jul 9, 13:45 UTCJul 9, 14:10 UTC25m
2026-07-09 ZSSUJ - Jul 9, 07:45 UTCJul 9, 08:20 UTC35m
2026-07-08 ZSSUJ - Jul 8, 13:10 UTCJul 8, 13:40 UTC30m
2026-07-08 ZSSUJ - Jul 8, 10:25 UTCJul 8, 11:00 UTC35m
2026-07-07 ZSSUJ - Jul 7, 13:15 UTCJul 7, 13:45 UTC30m
2026-07-07 ZSSUJ - Jul 7, 06:30 UTCJul 7, 07:15 UTC45m
2026-07-06 ZSSUJ - Jul 6, 14:15 UTCJul 6, 15:00 UTC45m
2026-07-05 ZSSUJ - Jul 5, 13:15 UTCJul 5, 14:30 UTC1h 15m
2026-07-05 ZSSUJ - Jul 5, 06:50 UTCJul 5, 07:05 UTC15m
2026-07-04 ZSSUJ - Jul 4, 07:05 UTCJul 4, 09:35 UTC2h 30m
2026-07-03 ZSSUJ - Jul 3, 14:20 UTCJul 3, 14:50 UTC30m
2026-07-03 ZSSUJ - Jul 3, 06:20 UTCJul 3, 06:50 UTC30m
2026-07-01 ZSSUJ - Jul 1, 11:05 UTCJul 1, 11:45 UTC40m
2026-07-01 ZSSUJ - Jul 1, 09:40 UTCJul 1, 10:15 UTC35m
2026-06-30 ZSSUJ - Jun 30, 06:55 UTCJun 30, 07:20 UTC25m
2026-06-29 ZSSUJ - Jun 29, 12:05 UTCJun 29, 14:19 UTC2h 15m
2026-06-29 ZSSUJ - Jun 29, 10:00 UTCJun 29, 10:59 UTC1h 0m
2026-06-29 ZSSUJ - Jun 29, 08:44 UTCJun 29, 09:05 UTC20m
2026-06-28 ZSSUJ - Jun 28, 14:54 UTCJun 28, 15:29 UTC35m
2026-06-28 ZSSUJ - Jun 28, 07:54 UTCJun 28, 08:25 UTC30m
2026-06-19 ZSSUJ - Jun 19, 06:49 UTCJun 19, 07:49 UTC1h 0m
2026-06-17 ZSSUJ - Jun 17, 14:30 UTCJun 17, 14:55 UTC25m
2026-06-17 ZSSUJ - Jun 17, 10:00 UTCJun 17, 10:35 UTC35m
2026-06-15 ZSSUJ - Jun 15, 13:50 UTCJun 15, 15:04 UTC1h 15m
2026-06-13 ZSSUJ - Jun 13, 11:40 UTCJun 13, 13:50 UTC2h 10m
2026-06-11 ZSSUJ - Jun 11, 13:40 UTCJun 11, 14:30 UTC50m
2026-06-11 ZSSUJ - Jun 11, 11:35 UTCJun 11, 12:25 UTC50m
2026-06-10 ZSSUJ - Jun 10, 12:00 UTCJun 10, 14:15 UTC2h 15m
2026-06-10 ZSSUJ - Jun 10, 10:00 UTCJun 10, 10:50 UTC50m
2026-06-09 ZSSUJ - Jun 9, 19:15 UTCJun 9, 20:20 UTC1h 5m
2026-06-09 ZSSUJ - Jun 9, 12:10 UTCJun 9, 12:40 UTC30m
2026-06-09 ZSSUJ - Jun 9, 09:15 UTCJun 9, 09:45 UTC30m
2026-06-09 ZSSUJ - Jun 9, 05:45 UTCJun 9, 06:00 UTC15m
2026-06-08 ZSSUJ - Jun 8, 19:05 UTCJun 8, 19:35 UTC30m
2026-06-07 ZSSUJ - Jun 7, 13:05 UTCJun 7, 13:35 UTC30m
2026-06-07 ZSSUJ - Jun 7, 11:10 UTCJun 7, 12:20 UTC1h 10m
2026-06-07 ZSSUJ - Jun 7, 09:20 UTCJun 7, 09:35 UTC15m

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 0091EF frequently asked

What is Mode-S code 0091EF?
0091EF is an ICAO 24-bit transponder address. Allocated to South Africa.
Where is Mode-S 0091EF registered?
Mode-S code 0091EF is allocated to South Africa (ZA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0091EF broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0091EF, octal 00110757, decimal 37,359.
What flights does 0091EF operate?
Mode-S 0091EF has broadcast 1 distinct callsign, including ZSSUJ.