sensors Mode-S transponder

00A50E

ICAO 24-bit transponder address · allocated to South Africa

Currently assigned to ZS-OAF · BOEING 737-400

Hex
00A50E
Octal
00122416
Decimal
42,254
Country
ZA
Tail
ZS-OAF
Type
B734
No current signal · last broadcast 20h ago
Flights observed
8
Distinct callsigns
5
Country
ZA
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S 00A50E.

Country allocation

The ICAO 24-bit address 00A50E 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 5 distinct

Callsign Airline Flights Last seen
SFR827 - 2 2026-04-13
SFR299 - 2 2026-04-14
SFR298 - 2 2026-04-14
SFR826 - 1 2026-04-13
SFR530 - 1 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 SFR299 - Apr 14, 09:45 UTCApr 14, 10:00 UTC15m
2026-04-14 SFR299 - Apr 14, 08:25 UTCApr 14, 08:45 UTC20m
2026-04-14 SFR298 - Apr 14, 07:10 UTCApr 14, 07:25 UTC15m
2026-04-14 SFR298 - Apr 14, 05:30 UTCApr 14, 07:10 UTC1h 40m
2026-04-13 SFR530 - Apr 13, 17:20 UTCApr 13, 19:45 UTC2h 25m
2026-04-13 SFR827 - Apr 13, 14:50 UTCApr 13, 15:30 UTC40m
2026-04-13 SFR827 - Apr 13, 11:55 UTCApr 13, 15:30 UTC3h 35m
2026-04-13 SFR826 - Apr 13, 11:30 UTCApr 13, 12:00 UTC30m

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 ZS-OAF page for operator, model, and routing details .

Mode-S 00A50E frequently asked

What is Mode-S code 00A50E?
00A50E is an ICAO 24-bit transponder address. Allocated to South Africa. Assigned to ZS-OAF.
Where is Mode-S 00A50E registered?
Mode-S code 00A50E 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 00A50E broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 00A50E, octal 00122416, decimal 42,254.
What flights does 00A50E operate?
Mode-S 00A50E has broadcast 5 distinct callsigns, including SFR827, SFR299, SFR298, SFR826, SFR530.