Apparatus

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sensors Mode-S transponder

00B231

ICAO 24-bit transponder address · allocated to South Africa

Currently assigned to ZS-SZO · AIRBUS A-320

Hex
00B231
Octal
00131061
Decimal
45,617
Country
ZA
Tail
ZS-SZO
Type
A320
No current signal · last broadcast 12h ago
Flights observed
144
Distinct callsigns
20
Country
ZA
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 00B231.

Country allocation

The ICAO 24-bit address 00B231 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 20 distinct

Callsign Airline Flights Last seen
SAA319 South African Airways 11 2026-05-17
SAA538 South African Airways 10 2026-05-20
SAA332 South African Airways 9 2026-05-17
SAA362 South African Airways 7 2026-05-17
SAA347 South African Airways 7 2026-05-17
SAA359 South African Airways 6 2026-05-06
SAA074 South African Airways 6 2026-05-12
SAA372 South African Airways 5 2026-05-06
SAA352 South African Airways 5 2026-05-24
SAA337 South African Airways 5 2026-05-24
SAA075 South African Airways 5 2026-04-30
SAA558 South African Airways 4 2026-05-13
SAA342 South African Airways 4 2026-05-19
SAA327 South African Airways 4 2026-05-19
SAA302 South African Airways 4 2026-05-11
SAA041 South African Airways 4 2026-05-21
SAA562 South African Airways 3 2026-05-06
SAA067 South African Airways 3 2026-04-28
SAA578 South African Airways 2 2026-05-19
SAA556 South African Airways 2 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SAA050 JNB → FBM May 29, 07:40 UTCMay 29, 13:05 UTC5h 25m
2026-05-24 SAA352 CPT → JNB May 24, 14:00 UTCMay 24, 15:40 UTC1h 40m
2026-05-24 SAA337 JNB → CPT May 24, 11:10 UTCMay 24, 13:05 UTC1h 55m
2026-05-23 SAA076 JNB → WDH May 23, 13:25 UTCMay 23, 17:30 UTC4h 5m
2026-05-23 SAA022 JNB → HRE May 23, 08:15 UTCMay 23, 11:55 UTC3h 40m
2026-05-22 SAA530 DUR → JNB May 22, 19:15 UTCMay 23, 06:00 UTC10h 44m
2026-05-22 SAA354 CPT → JNB May 22, 15:35 UTCMay 22, 17:10 UTC1h 35m
2026-05-22 SAA343 JNB → CPT May 22, 12:35 UTCMay 22, 14:25 UTC1h 50m
2026-05-22 SAA326 CPT → JNB May 22, 09:20 UTCMay 22, 10:55 UTC1h 35m
2026-05-22 SAA313 JNB → CPT May 22, 06:25 UTCMay 22, 08:15 UTC1h 50m
2026-05-21 SAA041 VFA → JNB May 21, 10:05 UTCMay 21, 13:50 UTC3h 45m
2026-05-21 SAA531 JNB → DUR May 21, 05:40 UTCMay 21, 08:10 UTC2h 30m
2026-05-20 SAA041 VFA → JNB May 20, 10:10 UTCMay 20, 13:50 UTC3h 40m
2026-05-20 SAA538 DUR → JNB May 20, 05:50 UTCMay 20, 08:10 UTC2h 20m
2026-05-19 SAA578 DUR → JNB May 19, 15:00 UTCMay 19, 17:35 UTC2h 35m
2026-05-19 SAA342 CPT → JNB May 19, 12:25 UTCMay 19, 14:05 UTC1h 40m
2026-05-19 SAA327 JNB → CPT May 19, 09:35 UTCMay 19, 11:25 UTC1h 50m
2026-05-19 SAA531 JNB → DUR May 19, 05:35 UTCMay 19, 08:15 UTC2h 40m
2026-05-18 SAA578 DUR → JNB May 18, 15:00 UTCMay 18, 17:35 UTC2h 35m
2026-05-18 SAA342 CPT → JNB May 18, 12:25 UTCMay 18, 14:10 UTC1h 45m
2026-05-18 SAA327 JNB → CPT May 18, 09:35 UTCMay 18, 11:15 UTC1h 40m
2026-05-18 SAA538 DUR → JNB May 18, 05:45 UTCMay 18, 08:05 UTC2h 20m
2026-05-17 SAA362 CPT → JNB May 17, 16:20 UTCMay 17, 17:55 UTC1h 35m
2026-05-17 SAA347 JNB → CPT May 17, 13:20 UTCMay 17, 15:15 UTC1h 55m
2026-05-17 SAA332 CPT → JNB May 17, 10:25 UTCMay 17, 12:05 UTC1h 40m
2026-05-17 SAA319 JNB → CPT May 17, 07:40 UTCMay 17, 09:30 UTC1h 50m
2026-05-16 SAA352 CPT → JNB May 16, 14:01 UTCMay 16, 15:45 UTC1h 45m
2026-05-16 SAA337 JNB → CPT May 16, 11:11 UTCMay 16, 12:55 UTC1h 45m
2026-05-15 SAA362 CPT → JNB May 15, 16:15 UTCMay 15, 17:55 UTC1h 40m
2026-05-15 SAA347 JNB → CPT May 15, 13:35 UTCMay 15, 15:25 UTC1h 49m
2026-05-15 SAA332 CPT → JNB May 15, 10:20 UTCMay 15, 11:55 UTC1h 35m
2026-05-15 SAA319 JNB → CPT May 15, 07:35 UTCMay 15, 09:30 UTC1h 55m
2026-05-14 SAA041 VFA → JNB May 14, 10:00 UTCMay 14, 13:50 UTC3h 50m
2026-05-13 SA066 - May 13, 17:55 UTCMay 14, 06:20 UTC12h 25m
2026-05-13 SAA558 DUR → JNB May 13, 11:00 UTCMay 13, 13:45 UTC2h 45m
2026-05-12 SAA074 JNB → WDH May 12, 10:05 UTCMay 12, 14:25 UTC4h 20m
2026-05-11 SAA066 JNB → LUN May 11, 17:45 UTCMay 12, 06:05 UTC12h 20m
2026-05-11 SAA074 JNB → WDH May 11, 10:10 UTCMay 11, 14:25 UTC4h 15m
2026-05-11 SAA302 CPT → JNB May 11, 05:20 UTCMay 11, 05:50 UTC30m
2026-05-11 SAA302 CPT → JNB May 11, 04:10 UTCMay 11, 04:25 UTC15m
2026-05-10 SA363 JNB → CPT May 10, 17:15 UTCMay 10, 19:19 UTC2h 5m
2026-05-10 SAA352 CPT → JNB May 10, 15:29 UTCMay 10, 15:49 UTC20m
2026-05-10 SAA352 CPT → JNB May 10, 14:14 UTCMay 10, 14:34 UTC20m
2026-05-10 SAA337 JNB → CPT May 10, 11:20 UTCMay 10, 13:19 UTC2h 0m
2026-05-09 SAA558 DUR → JNB May 9, 11:05 UTCMay 9, 13:40 UTC2h 35m
2026-05-09 SAA306 CPT → JNB May 9, 05:05 UTCMay 9, 06:35 UTC1h 30m
2026-05-08 SAA363 JNB → CPT May 8, 17:00 UTCMay 8, 19:00 UTC2h 0m
2026-05-08 SAA558 DUR → JNB May 8, 10:59 UTCMay 8, 14:00 UTC3h 0m
2026-05-07 SAA041 VFA → JNB May 7, 10:10 UTCMay 7, 14:05 UTC3h 55m
2026-05-07 SAA538 DUR → JNB May 7, 05:50 UTCMay 7, 08:20 UTC2h 30m

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-SZO page for operator, model, and routing details .

Mode-S 00B231 frequently asked

What is Mode-S code 00B231?
00B231 is an ICAO 24-bit transponder address. Allocated to South Africa. Assigned to ZS-SZO.
Where is Mode-S 00B231 registered?
Mode-S code 00B231 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 00B231 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 00B231, octal 00131061, decimal 45,617.
What flights does 00B231 operate?
Mode-S 00B231 has broadcast 20 distinct callsigns, including SAA319, SAA538, SAA332, SAA362, SAA347.