Apparatus

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sensors Mode-S transponder

00B091

ICAO 24-bit transponder address · allocated to South Africa

Currently assigned to ZS-SJO · BOEING 737-800

Hex
00B091
Octal
00130221
Decimal
45,201
Country
ZA
Tail
ZS-SJO
Type
B738
No current signal · last broadcast 7h ago
Flights observed
212
Distinct callsigns
20
Country
ZA
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 00B091.

Country allocation

The ICAO 24-bit address 00B091 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
SFR474 - 5 2026-07-04
SFR473 - 5 2026-07-04
SFR121 - 5 2026-07-04
SFR120 - 5 2026-07-04
SFR289 Safair 4 2026-07-06
SFR279 - 4 2026-06-30
SFR221 - 4 2026-07-06
SFR839 - 3 2026-06-23
SFR838 - 3 2026-06-23
SFR691 Safair 3 2026-04-19
SFR667 - 3 2026-07-02
SFR601 - 3 2026-07-02
SFR600 Safair 3 2026-07-02
SFR315 Safair 3 2026-04-18
SFR293 Safair 3 2026-06-09
SFR292 Safair 3 2026-06-09
SFR215 - 3 2026-06-24
SFR214 Safair 3 2026-06-24
SFR209 - 3 2026-07-05
SFR201 - 3 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SFR100 - Jul 14, 04:10 UTCJul 14, 05:45 UTC1h 35m
2026-07-13 SFR567 CPT → CPT Jul 13, 17:05 UTCJul 13, 20:10 UTC3h 5m
2026-07-13 SFR635 - Jul 13, 10:50 UTCJul 13, 16:10 UTC5h 20m
2026-07-13 SFR841 - Jul 13, 04:55 UTCJul 13, 08:30 UTC3h 35m
2026-07-12 SFR123 - Jul 12, 18:10 UTCJul 12, 20:01 UTC1h 50m
2026-07-12 SFR122 - Jul 12, 15:25 UTCJul 12, 17:01 UTC1h 35m
2026-07-12 SFR843 CPT → CPT Jul 12, 11:01 UTCJul 12, 14:35 UTC3h 35m
2026-07-12 SFR119 - Jul 12, 08:05 UTCJul 12, 10:05 UTC2h 0m
2026-07-12 SFR118 - Jul 12, 05:25 UTCJul 12, 07:01 UTC1h 35m
2026-07-11 SFR568 CPT → CPT Jul 11, 17:05 UTCJul 11, 20:00 UTC2h 55m
2026-07-11 SFR143 - Jul 11, 11:10 UTCJul 11, 14:45 UTC3h 35m
2026-07-11 SFR311 HLA → CPT Jul 11, 08:10 UTCJul 11, 10:10 UTC2h 0m
2026-07-11 SFR310 - Jul 11, 05:31 UTCJul 11, 07:05 UTC1h 35m
2026-07-10 SFR312 HLA → CPT Jul 10, 04:05 UTCJul 10, 06:05 UTC2h 0m
2026-07-09 SFR304 CPT → HLA Jul 9, 17:55 UTCJul 9, 19:35 UTC1h 40m
2026-07-09 SFR303 HLA → CPT Jul 9, 14:55 UTCJul 9, 16:55 UTC2h 0m
2026-07-09 SFR320 HLA → HLA Jul 9, 11:05 UTCJul 9, 13:45 UTC2h 40m
2026-07-09 SFR302 - Jul 9, 09:40 UTCJul 9, 09:55 UTC15m
2026-07-09 SFR302 - Jul 9, 08:20 UTCJul 9, 08:40 UTC20m
2026-07-09 SFR301 - Jul 9, 06:45 UTCJul 9, 07:10 UTC25m
2026-07-09 SFR301 - Jul 9, 05:10 UTCJul 9, 05:35 UTC25m
2026-07-08 SFR359 CPT → HLA Jul 8, 16:50 UTCJul 8, 18:25 UTC1h 35m
2026-07-08 SFR358 HLA → CPT Jul 8, 13:50 UTCJul 8, 15:55 UTC2h 5m
2026-07-08 SFR356 HLA → HLA Jul 8, 08:25 UTCJul 8, 12:15 UTC3h 50m
2026-07-08 SFR354 HLA → HLA Jul 8, 04:45 UTCJul 8, 07:25 UTC2h 40m
2026-07-07 SFR353 CPT → HLA Jul 7, 14:00 UTCJul 7, 15:35 UTC1h 35m
2026-07-07 SFR105 - Jul 7, 07:15 UTCJul 7, 09:10 UTC1h 55m
2026-07-06 SFR541 - Jul 6, 18:15 UTCJul 6, 20:40 UTC2h 25m
2026-07-06 SFR289 DUR → JNB Jul 6, 14:40 UTCJul 6, 17:05 UTC2h 25m
2026-07-06 SFR221 - Jul 6, 09:45 UTCJul 6, 13:40 UTC3h 55m
2026-07-06 SFR369 - Jul 6, 04:40 UTCJul 6, 08:10 UTC3h 30m
2026-07-05 SFR209 CPT → JNB Jul 5, 16:45 UTCJul 5, 18:25 UTC1h 40m
2026-07-05 SFR208 - Jul 5, 13:55 UTCJul 5, 15:55 UTC2h 0m
2026-07-05 SFR397 - Jul 5, 10:25 UTCJul 5, 12:55 UTC2h 30m
2026-07-05 SFR201 - Jul 5, 07:05 UTCJul 5, 08:50 UTC1h 45m
2026-07-05 SFR200 - Jul 5, 04:15 UTCJul 5, 06:10 UTC1h 55m
2026-07-04 SFR278 JNB → DUR Jul 4, 17:10 UTCJul 4, 17:30 UTC20m
2026-07-04 SFR120 - Jul 4, 14:40 UTCJul 4, 16:10 UTC1h 30m
2026-07-04 SFR121 - Jul 4, 11:35 UTCJul 4, 13:30 UTC1h 55m
2026-07-04 SFR474 - Jul 4, 07:50 UTCJul 4, 10:25 UTC2h 35m
2026-07-04 SFR473 - Jul 4, 04:20 UTCJul 4, 06:55 UTC2h 35m
2026-07-03 SFR603 CPT → JNB Jul 3, 19:05 UTCJul 3, 20:40 UTC1h 35m
2026-07-03 SFR602 - Jul 3, 16:20 UTCJul 3, 18:20 UTC2h 0m
2026-07-03 SFR847 - Jul 3, 15:00 UTCJul 3, 15:20 UTC20m
2026-07-03 SFR846 - Jul 3, 12:55 UTCJul 3, 13:20 UTC25m
2026-07-03 SFR370 - Jul 3, 07:05 UTCJul 3, 10:30 UTC3h 25m
2026-07-02 SFR667 CPT → JNB Jul 2, 16:00 UTCJul 2, 19:35 UTC3h 35m
2026-07-02 SFR600 JNB → CPT Jul 2, 13:05 UTCJul 2, 15:05 UTC2h 0m
2026-07-02 SFR601 CPT → JNB Jul 2, 10:15 UTCJul 2, 11:50 UTC1h 35m
2026-07-02 SFR177 - Jul 2, 05:30 UTCJul 2, 09:15 UTC3h 45m

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

Mode-S 00B091 frequently asked

What is Mode-S code 00B091?
00B091 is an ICAO 24-bit transponder address. Allocated to South Africa. Assigned to ZS-SJO.
Where is Mode-S 00B091 registered?
Mode-S code 00B091 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 00B091 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 00B091, octal 00130221, decimal 45,201.
What flights does 00B091 operate?
Mode-S 00B091 has broadcast 20 distinct callsigns, including SFR474, SFR473, SFR121, SFR120, SFR289.