Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 8h ago
Flights observed
321
Distinct callsigns
20
Country
ZA
Last broadcast
8h 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 - 16 2026-07-10
SFR463 - 12 2026-07-07
SFR692 - 11 2026-07-14
SFR693 - 10 2026-07-14
SFR464 - 10 2026-07-07
SFR412 - 10 2026-07-13
SFR411 - 9 2026-07-12
SFR668 - 8 2026-07-14
SFR171 - 8 2026-07-14
SFR669 - 7 2026-07-14
SFR465 - 7 2026-07-10
SFR416 - 7 2026-07-10
SFR477 - 6 2026-07-12
SFR415 - 6 2026-06-26
SFR478 - 5 2026-07-05
SFR381 Safair 5 2026-05-15
SFR829 Safair 4 2026-06-14
SFR811 - 4 2026-06-15
SFR417 Safair 4 2026-05-18
SFR380 Safair 4 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SFR170 - Jul 14, 16:40 UTCJul 14, 17:05 UTC25m
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
2026-07-12 SFR477 - Jul 12, 06:35 UTCJul 12, 17:01 UTC10h 25m
2026-07-11 SFR411 - Jul 11, 16:35 UTCJul 12, 05:25 UTC12h 50m
2026-07-11 SFR171 - Jul 11, 15:20 UTCJul 11, 15:40 UTC20m
2026-07-11 SFR669 - Jul 11, 11:50 UTCJul 11, 12:10 UTC20m
2026-07-11 SFR693 - Jul 11, 09:00 UTCJul 11, 10:35 UTC1h 35m
2026-07-11 SFR692 - Jul 11, 06:10 UTCJul 11, 08:15 UTC2h 5m
2026-07-10 SFR465 - Jul 10, 18:10 UTCJul 11, 05:01 UTC10h 51m
2026-07-10 SFR416 - Jul 10, 13:20 UTCJul 10, 17:05 UTC3h 45m
2026-07-10 SFR462 - Jul 10, 08:35 UTCJul 10, 12:20 UTC3h 45m
2026-07-10 SFR462 - Jul 10, 07:05 UTCJul 10, 07:35 UTC30m
2026-07-09 SFR412 - Jul 9, 06:45 UTCJul 9, 07:10 UTC25m
2026-07-08 SFR411 CPT → JNB Jul 8, 16:45 UTCJul 9, 05:30 UTC12h 45m
2026-07-08 SFR171 - Jul 8, 11:50 UTCJul 8, 15:50 UTC4h 0m
2026-07-08 SFR693 CPT → JNB Jul 8, 09:05 UTCJul 8, 10:45 UTC1h 40m
2026-07-08 SFR692 - Jul 8, 06:10 UTCJul 8, 08:10 UTC2h 0m
2026-07-07 SFR668 CPT → JNB Jul 7, 17:55 UTCJul 8, 05:00 UTC11h 5m
2026-07-07 SFR464 - Jul 7, 13:20 UTCJul 7, 16:55 UTC3h 35m
2026-07-07 SFR463 CPT → JNB Jul 7, 08:35 UTCJul 7, 12:15 UTC3h 40m
2026-07-07 SFR462 - Jul 7, 06:45 UTCJul 7, 07:15 UTC30m
2026-07-06 SFR412 - Jul 6, 06:40 UTCJul 6, 07:00 UTC20m
2026-07-05 SFR478 - Jul 5, 17:55 UTCJul 6, 05:25 UTC11h 30m
2026-07-05 SFR477 JNB → HLA Jul 5, 06:35 UTCJul 5, 17:00 UTC10h 25m
2026-07-05 SFR411 - Jul 5, 05:10 UTCJul 5, 05:25 UTC15m
2026-07-04 SFR170 CPT → DUR Jul 4, 16:50 UTCJul 4, 17:10 UTC20m
2026-07-04 SFR171 - Jul 4, 15:20 UTCJul 4, 15:40 UTC20m
2026-07-04 SFR669 - Jul 4, 11:50 UTCJul 4, 12:10 UTC20m
2026-07-04 SFR693 - Jul 4, 09:10 UTCJul 4, 10:40 UTC1h 30m
2026-07-04 SFR692 - Jul 4, 06:10 UTCJul 4, 08:10 UTC2h 0m
2026-07-03 SFR688 - Jul 3, 18:30 UTCJul 4, 05:10 UTC10h 40m
2026-07-03 SFR464 - Jul 3, 13:25 UTCJul 3, 17:10 UTC3h 45m
2026-07-03 SFR463 CPT → JNB Jul 3, 08:50 UTCJul 3, 12:25 UTC3h 35m
2026-07-03 SFR462 - Jul 3, 07:00 UTCJul 3, 07:25 UTC25m
2026-07-02 SFR412 - Jul 2, 06:41 UTCJul 2, 07:00 UTC19m
2026-07-01 SFR170 CPT → DUR Jul 1, 16:50 UTCJul 2, 05:30 UTC12h 40m
2026-07-01 SFR171 - Jul 1, 11:45 UTCJul 1, 15:50 UTC4h 5m
2026-07-01 SFR693 - Jul 1, 10:25 UTCJul 1, 10:45 UTC20m
2026-07-01 SFR692 - Jul 1, 06:15 UTCJul 1, 08:05 UTC1h 50m
2026-06-30 SFR465 - Jun 30, 17:55 UTCJul 1, 04:55 UTC11h 0m
2026-06-30 SFR464 CPT → CPT Jun 30, 08:30 UTCJun 30, 17:05 UTC8h 35m
2026-06-30 SFR462 - Jun 30, 07:05 UTCJun 30, 07:35 UTC30m
2026-06-29 SFR412 - Jun 29, 06:44 UTCJun 29, 07:09 UTC25m

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 8h 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, SFR463, SFR692, SFR693, SFR464.