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 19d ago
Flights observed
255
Distinct callsigns
20
Country
ZA
Last broadcast
19d 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
SFR289 - 5 2026-07-18
SFR221 - 5 2026-07-18
SFR121 - 5 2026-07-04
SFR120 - 5 2026-07-04
SFR691 Safair 4 2026-07-25
SFR279 - 4 2026-06-30
SFR839 - 3 2026-06-23
SFR838 - 3 2026-06-23
SFR690 Safair 3 2026-07-25
SFR667 - 3 2026-07-02
SFR605 - 3 2026-07-20
SFR604 Safair 3 2026-07-20
SFR601 - 3 2026-07-02
SFR600 Safair 3 2026-07-02
SFR361 - 3 2026-07-16
SFR315 Safair 3 2026-04-18
SFR293 Safair 3 2026-06-09
SFR292 Safair 3 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SFR126 CPT → JNB Jul 26, 13:50 UTCJul 26, 15:30 UTC1h 40m
2026-07-26 SFR181 PLZ → CPT Jul 26, 09:45 UTCJul 26, 12:45 UTC3h 0m
2026-07-26 SFR351 HLA → CPT Jul 26, 06:55 UTCJul 26, 08:45 UTC1h 50m
2026-07-26 SFR350 CPT → HLA Jul 26, 04:15 UTCJul 26, 06:00 UTC1h 45m
2026-07-25 SFR691 JNB → CPT Jul 25, 16:45 UTCJul 25, 18:35 UTC1h 50m
2026-07-25 SFR690 CPT → JNB Jul 25, 13:30 UTCJul 25, 15:20 UTC1h 50m
2026-07-25 SFR161 DUR → CPT Jul 25, 09:00 UTCJul 25, 12:40 UTC3h 40m
2026-07-25 SFR660 DUR → JNB Jul 25, 04:35 UTCJul 25, 07:55 UTC3h 20m
2026-07-24 SFR806 JNB → CPT Jul 24, 19:00 UTCJul 24, 20:50 UTC1h 50m
2026-07-24 SFR807 CPT → JNB Jul 24, 16:05 UTCJul 24, 17:50 UTC1h 45m
2026-07-24 SFR189 DUR → CPT Jul 24, 11:25 UTCJul 24, 15:00 UTC3h 35m
2026-07-24 SFR400 DUR → JNB Jul 24, 09:25 UTCJul 24, 09:45 UTC20m
2026-07-24 SFR188 CPT → DUR Jul 24, 06:15 UTCJul 24, 06:30 UTC15m
2026-07-23 SFR702 JNB → CPT Jul 23, 07:20 UTCJul 23, 09:20 UTC2h 0m
2026-07-23 SFR701 CPT → JNB Jul 23, 04:40 UTCJul 23, 06:15 UTC1h 35m
2026-07-22 SFR187 DUR → CPT Jul 22, 13:20 UTCJul 22, 17:45 UTC4h 25m
2026-07-22 SFR157 ELS → CPT Jul 22, 12:00 UTCJul 22, 12:25 UTC25m
2026-07-21 SFR466 DUR → CPT Jul 21, 15:10 UTCJul 21, 20:00 UTC4h 50m
2026-07-21 SFR812 CPT → WDH Jul 21, 09:15 UTCJul 21, 14:10 UTC4h 55m
2026-07-21 SFR147 ELS → CPT Jul 21, 04:35 UTCJul 21, 08:10 UTC3h 35m
2026-07-20 SFR115 - Jul 20, 17:50 UTCJul 20, 19:50 UTC2h 0m
2026-07-20 SFR207 CPT → JNB Jul 20, 13:50 UTCJul 20, 15:20 UTC1h 30m
2026-07-20 SFR206 - Jul 20, 10:45 UTCJul 20, 12:55 UTC2h 10m
2026-07-20 SFR605 - Jul 20, 07:50 UTCJul 20, 09:25 UTC1h 35m
2026-07-20 SFR604 JNB → CPT Jul 20, 05:00 UTCJul 20, 07:05 UTC2h 5m
2026-07-19 SFR227 GRJ → JNB Jul 19, 15:10 UTCJul 19, 19:00 UTC3h 50m
2026-07-19 SFR365 PLZ → JNB Jul 19, 10:35 UTCJul 19, 14:05 UTC3h 30m
2026-07-19 SFR247 ELS → JNB Jul 19, 05:55 UTCJul 19, 09:00 UTC3h 5m
2026-07-18 SFR289 - Jul 18, 14:20 UTCJul 18, 16:50 UTC2h 30m
2026-07-18 SFR221 JNB → JNB Jul 18, 09:20 UTCJul 18, 13:20 UTC4h 0m
2026-07-18 370 JNB → JNB Jul 18, 04:25 UTCJul 18, 07:55 UTC3h 30m
2026-07-17 SFR205 - Jul 17, 18:15 UTCJul 17, 19:49 UTC1h 35m
2026-07-17 SFR204 - Jul 17, 15:20 UTCJul 17, 17:15 UTC1h 55m
2026-07-17 SFR241 ELS → JNB Jul 17, 10:40 UTCJul 17, 14:00 UTC3h 20m
2026-07-17 SFR389 - Jul 17, 05:35 UTCJul 17, 08:49 UTC3h 15m
2026-07-16 SFR249 - Jul 16, 14:35 UTCJul 16, 17:49 UTC3h 15m
2026-07-16 SFR361 - Jul 16, 09:50 UTCJul 16, 13:30 UTC3h 40m
2026-07-16 SFR251 - Jul 16, 04:10 UTCJul 16, 08:05 UTC3h 55m
2026-07-15 SFR205 - Jul 15, 18:00 UTCJul 15, 19:40 UTC1h 40m
2026-07-15 SFR204 - Jul 15, 15:00 UTCJul 15, 17:05 UTC2h 5m
2026-07-15 SFR593 - Jul 15, 10:45 UTCJul 15, 12:25 UTC1h 40m
2026-07-15 SFR592 JNB → CPT Jul 15, 07:55 UTCJul 15, 09:55 UTC2h 0m
2026-07-15 SFR591 - Jul 15, 04:20 UTCJul 15, 07:00 UTC2h 40m
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

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 19d 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, SFR289, SFR221, SFR121.