sensors Mode-S transponder

00C77D

ICAO 24-bit transponder address · allocated to South Africa

Currently assigned to ZS-ZWG · BOEING 737-800

Hex
00C77D
Octal
00143575
Decimal
51,069
Country
ZA
Tail
ZS-ZWG
Type
B738
No current signal · last broadcast 17h ago
Flights observed
11
Distinct callsigns
10
Country
ZA
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 00C77D.

Country allocation

The ICAO 24-bit address 00C77D 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 10 distinct

Callsign Airline Flights Last seen
SFR204 - 2 2026-04-13
SFR677 - 1 2026-04-12
SFR389 - 1 2026-04-13
SFR388 - 1 2026-04-13
SFR241 - 1 2026-04-13
SFR240 - 1 2026-04-13
SFR205 - 1 2026-04-13
SFR202 Safair 1 2026-04-14
SFR201 Safair 1 2026-04-14
SFR200 Safair 1 2026-04-14

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 SFR202 JNB → CPT Apr 14, 10:10 UTCApr 14, 10:35 UTC25m
2026-04-14 SFR201 CPT → JNB Apr 14, 07:05 UTCApr 14, 07:10 UTC5m
2026-04-14 SFR200 JNB → CPT Apr 14, 05:30 UTCApr 14, 06:00 UTC30m
2026-04-13 SFR205 - Apr 13, 18:05 UTCApr 13, 19:40 UTC1h 35m
2026-04-13 SFR204 - Apr 13, 16:15 UTCApr 13, 16:45 UTC30m
2026-04-13 SFR204 - Apr 13, 15:00 UTCApr 13, 16:15 UTC1h 15m
2026-04-13 SFR241 - Apr 13, 13:05 UTCApr 13, 13:30 UTC25m
2026-04-13 SFR240 - Apr 13, 10:25 UTCApr 13, 10:40 UTC15m
2026-04-13 SFR389 - Apr 13, 08:20 UTCApr 13, 08:50 UTC30m
2026-04-13 SFR388 - Apr 13, 05:40 UTCApr 13, 06:00 UTC20m
2026-04-12 SFR677 - Apr 12, 18:00 UTCApr 12, 18:55 UTC55m

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

Mode-S 00C77D frequently asked

What is Mode-S code 00C77D?
00C77D is an ICAO 24-bit transponder address. Allocated to South Africa. Assigned to ZS-ZWG.
Where is Mode-S 00C77D registered?
Mode-S code 00C77D 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 00C77D broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 00C77D, octal 00143575, decimal 51,069.
What flights does 00C77D operate?
Mode-S 00C77D has broadcast 10 distinct callsigns, including SFR204, SFR677, SFR389, SFR388, SFR241.