Mode-S C842C7 · Transponder Hex for ZK-TXF

Q: What is Mode-S code C842C7?

C842C7 is an ICAO 24-bit transponder address. Assigned to ZK-TXF .

Last known position

Most recent position reported by Mode-S C842C7.

Callsign history 4 distinct

Callsign	Airline	Flights	Last seen
TFX52	-	1	2026-04-13
TFX49	-	1	2026-04-14
TFX41	-	1	2026-04-13
TFX34	-	1	2026-04-13

Recent flights last 4

Date	Flight	Route	Takeoff	Landing	Duration
2026-04-14	TFX49	-	Apr 14, 09:15 UTC	Apr 14, 10:00 UTC	45m
2026-04-13	TFX52	-	Apr 13, 18:40 UTC	Apr 13, 19:10 UTC	30m
2026-04-13	TFX41	SYD → BNE	Apr 13, 12:40 UTC	Apr 13, 13:50 UTC	1h 10m
2026-04-13	TFX34	ADL → SYD	Apr 13, 09:45 UTC	Apr 13, 11:15 UTC	1h 30m

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 ZK-TXF page for operator, model, and routing details .

Mode-S C842C7 frequently asked

What is Mode-S code C842C7?

C842C7 is an ICAO 24-bit transponder address. Assigned to ZK-TXF.

Is C842C7 broadcasting right now?

No active broadcast right now. Last signal was 18h ago.

Hex, octal, and decimal Mode-S codes: what's the difference?

The same 24-bit identifier expressed in different bases: hex C842C7, octal 62041307, decimal 13,124,295.

What flights does C842C7 operate?

Mode-S C842C7 has broadcast 4 distinct callsigns, including TFX52, TFX49, TFX41, TFX34.