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sensors Mode-S transponder

00C451

ICAO 24-bit transponder address · allocated to South Africa

Currently assigned to ZS-ZWA · BOEING 737-800

Hex
00C451
Octal
00142121
Decimal
50,257
Country
ZA
Tail
ZS-ZWA
Type
B738
No current signal · last broadcast 19d ago
Flights observed
362
Distinct callsigns
20
Country
ZA
Last broadcast
19d ago

Last known position

Most recent position reported by Mode-S 00C451.

Country allocation

The ICAO 24-bit address 00C451 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
SFR462 - 18 2026-07-19
SFR693 Safair 13 2026-07-20
SFR692 Safair 13 2026-07-20
SFR463 - 12 2026-07-07
SFR464 Safair 11 2026-07-19
SFR411 Safair 11 2026-07-22
SFR668 Safair 10 2026-07-19
SFR412 - 10 2026-07-13
SFR171 - 10 2026-07-20
SFR669 - 8 2026-07-16
SFR415 Safair 8 2026-07-22
SFR477 - 7 2026-07-17
SFR465 - 7 2026-07-10
SFR416 - 7 2026-07-10
SFR478 Safair 6 2026-07-17
SFR811 Safair 5 2026-07-25
SFR381 Safair 5 2026-05-15
SFR170 - 5 2026-07-16
SFR829 Safair 4 2026-06-14
SFR417 Safair 4 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SFR832 JNB → ELS Jul 26, 13:20 UTCJul 26, 13:40 UTC20m
2026-07-26 SFR673 MQP → JNB Jul 26, 11:40 UTCJul 26, 12:05 UTC25m
2026-07-26 SFR672 JNB → MQP Jul 26, 10:00 UTCJul 26, 10:15 UTC15m
2026-07-26 SFR347 DUR → JNB Jul 26, 08:00 UTCJul 26, 08:15 UTC15m
2026-07-26 SFR346 JNB → DUR Jul 26, 05:50 UTCJul 26, 06:05 UTC15m
2026-07-25 SFR515 DUR → JNB Jul 25, 16:35 UTCJul 25, 18:55 UTC2h 20m
2026-07-25 SFR513 CPT → JNB Jul 25, 13:55 UTCJul 25, 15:40 UTC1h 45m
2026-07-25 SFR512 JNB → CPT Jul 25, 11:10 UTCJul 25, 12:55 UTC1h 45m
2026-07-25 SFR811 HRE → JNB Jul 25, 05:25 UTCJul 25, 09:25 UTC4h 0m
2026-07-24 SFR269 DUR → JNB Jul 24, 16:10 UTCJul 24, 18:40 UTC2h 30m
2026-07-24 SFR207 CPT → JNB Jul 24, 13:25 UTCJul 24, 15:10 UTC1h 45m
2026-07-24 SFR206 JNB → CPT Jul 24, 10:40 UTCJul 24, 12:35 UTC1h 55m
2026-07-24 SFR605 CPT → JNB Jul 24, 07:45 UTCJul 24, 09:25 UTC1h 40m
2026-07-24 SFR604 JNB → CPT Jul 24, 04:45 UTCJul 24, 06:40 UTC1h 55m
2026-07-23 SFR252 JNB → GRJ Jul 23, 14:10 UTCJul 23, 14:30 UTC20m
2026-07-23 SFR295 CPT → JNB Jul 23, 11:30 UTCJul 23, 13:05 UTC1h 35m
2026-07-23 SFR294 JNB → CPT Jul 23, 08:40 UTCJul 23, 10:35 UTC1h 55m
2026-07-22 SFR411 DUR → JNB Jul 22, 13:20 UTCJul 23, 05:30 UTC16h 10m
2026-07-22 SFR415 DUR → JNB Jul 22, 11:15 UTCJul 22, 12:20 UTC1h 5m
2026-07-21 SFR414 JNB → DUR Jul 21, 10:40 UTCJul 21, 10:55 UTC15m
2026-07-21 SFR413 DUR → JNB Jul 21, 06:55 UTCJul 21, 09:25 UTC2h 30m
2026-07-20 SFR424 DUR → JNB Jul 20, 17:10 UTCJul 21, 05:35 UTC12h 25m
2026-07-20 SFR171 - Jul 20, 12:15 UTCJul 20, 16:15 UTC4h 0m
2026-07-20 SFR693 CPT → JNB Jul 20, 10:35 UTCJul 20, 11:00 UTC25m
2026-07-20 SFR693 CPT → JNB Jul 20, 09:25 UTCJul 20, 09:45 UTC20m
2026-07-20 SFR692 JNB → CPT Jul 20, 06:20 UTCJul 20, 08:30 UTC2h 10m
2026-07-19 SFR668 DUR → JNB Jul 19, 18:10 UTCJul 20, 05:05 UTC10h 55m
2026-07-19 SFR464 DUR → CPT Jul 19, 13:15 UTCJul 19, 17:10 UTC3h 55m
2026-07-19 SFR415 DUR → JNB Jul 19, 08:30 UTCJul 19, 12:15 UTC3h 45m
2026-07-19 SFR462 - Jul 19, 07:00 UTCJul 19, 07:30 UTC30m
2026-07-18 SFR462 - Jul 18, 10:35 UTCJul 19, 07:30 UTC20h 55m
2026-07-18 SFA413 - Jul 18, 06:45 UTCJul 18, 09:15 UTC2h 30m
2026-07-17 SFR478 HLA → DUR Jul 17, 18:25 UTCJul 18, 05:30 UTC11h 6m
2026-07-17 SFR477 - Jul 17, 06:45 UTCJul 17, 17:30 UTC10h 45m
2026-07-16 SFR170 - Jul 16, 16:35 UTCJul 17, 05:20 UTC12h 45m
2026-07-16 SFR171 - Jul 16, 15:25 UTCJul 16, 15:45 UTC20m
2026-07-16 SFR669 - Jul 16, 11:54 UTCJul 16, 12:20 UTC25m
2026-07-16 SFR693 - Jul 16, 09:10 UTCJul 16, 10:55 UTC1h 45m
2026-07-16 SFR692 - Jul 16, 06:10 UTCJul 16, 08:10 UTC2h 0m
2026-07-16 SFR668 - Jul 16, 04:35 UTCJul 16, 05:00 UTC25m
2026-07-15 SFR411 - Jul 15, 06:45 UTCJul 16, 05:00 UTC22h 15m
2026-07-14 SFR170 CPT → JNB Jul 14, 16:40 UTCJul 15, 05:20 UTC12h 39m
2026-07-14 SFR171 - Jul 14, 15:10 UTCJul 14, 15:30 UTC20m
2026-07-14 SFR669 - Jul 14, 11:45 UTCJul 14, 12:10 UTC25m
2026-07-14 SFR693 - Jul 14, 09:00 UTCJul 14, 10:35 UTC1h 35m
2026-07-14 SFR692 - Jul 14, 06:05 UTCJul 14, 08:05 UTC2h 0m
2026-07-14 SFR668 - Jul 14, 04:30 UTCJul 14, 04:55 UTC25m
2026-07-13 SFR412 - Jul 13, 09:10 UTCJul 14, 04:55 UTC19h 45m
2026-07-13 SFR9411 - Jul 13, 08:01 UTCJul 13, 08:15 UTC15m
2026-07-12 SFR411 HLA → HLA Jul 12, 18:01 UTCJul 13, 05:50 UTC11h 50m

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

Mode-S 00C451 frequently asked

What is Mode-S code 00C451?
00C451 is an ICAO 24-bit transponder address. Allocated to South Africa. Assigned to ZS-ZWA.
Where is Mode-S 00C451 registered?
Mode-S code 00C451 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 00C451 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 00C451, octal 00142121, decimal 50,257.
What flights does 00C451 operate?
Mode-S 00C451 has broadcast 20 distinct callsigns, including SFR462, SFR693, SFR692, SFR463, SFR464.