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sensors Mode-S transponder

C842C7

ICAO 24-bit transponder address

Currently assigned to ZK-TXF · BOEING 737-800

Hex
C842C7
Octal
62041307
Decimal
13,124,295
Tail
ZK-TXF
Type
B738
No current signal · last broadcast Jul 24, 09:10 UTC
Flights observed
235
Distinct callsigns
20
Country
-
Last broadcast
Jul 24, 09:10 UTC

Last known position

Most recent position reported by Mode-S C842C7.

Callsign history 20 distinct

Callsign Airline Flights Last seen
TFX34 - 20 2026-07-15
TFX41 - 19 2026-07-15
TFX42 - 18 2026-07-14
TFX36 - 17 2026-07-14
TFX12 - 17 2026-07-22
TFX52 - 15 2026-07-15
TFX23 - 14 2026-07-23
TFX22 - 14 2026-07-22
TFX21 - 14 2026-07-22
TFX11 - 14 2026-07-23
TFX94 - 13 2026-07-22
TFX93 - 12 2026-07-22
TFX49 - 12 2026-07-14
TFX402 - 11 2026-07-14
TFX53 - 8 2026-06-19
TFX51 - 4 2026-07-16
TFX92 - 3 2026-07-23
ASY1220 - 3 2026-06-13
TST1 - 2 2026-04-24
TFX96 - 2 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 TFX96 BNE → BNE Jul 24, 03:40 UTCJul 24, 09:05 UTC5h 25m
2026-07-23 TFX92 BNE → BNE Jul 23, 20:15 UTCJul 24, 01:35 UTC5h 20m
2026-07-23 TFX23 MEL → BNE Jul 23, 15:20 UTCJul 23, 17:00 UTC1h 40m
2026-07-23 TFX11 PER → MEL Jul 23, 10:55 UTCJul 23, 14:10 UTC3h 15m
2026-07-22 TFX12 - Jul 22, 18:15 UTCJul 22, 22:00 UTC3h 45m
2026-07-22 TFX94 - Jul 22, 16:40 UTCJul 22, 17:20 UTC40m
2026-07-22 TFX93 - Jul 22, 14:50 UTCJul 22, 15:20 UTC30m
2026-07-22 TFX22 SYD → MEL Jul 22, 12:50 UTCJul 22, 14:00 UTC1h 10m
2026-07-22 TFX21 - Jul 22, 11:25 UTCJul 22, 11:35 UTC10m
2026-07-21 TFX23 MEL → BNE Jul 21, 15:25 UTCJul 21, 17:10 UTC1h 45m
2026-07-21 TFX11 PER → MEL Jul 21, 10:55 UTCJul 21, 13:55 UTC3h 0m
2026-07-20 TFX12 - Jul 20, 18:20 UTCJul 20, 22:10 UTC3h 50m
2026-07-20 TFX94 - Jul 20, 16:55 UTCJul 20, 17:35 UTC40m
2026-07-20 TFX93 - Jul 20, 15:10 UTCJul 20, 15:40 UTC30m
2026-07-20 TFX22 SYD → MEL Jul 20, 12:45 UTCJul 20, 13:50 UTC1h 5m
2026-07-20 TFX21 BNE → SYD Jul 20, 09:50 UTCJul 20, 11:05 UTC1h 15m
2026-07-16 TFX92 BNE → BNE Jul 16, 20:45 UTCJul 17, 01:59 UTC5h 15m
2026-07-16 TFX51 - Jul 16, 09:30 UTCJul 16, 10:04 UTC35m
2026-07-15 TFX52 - Jul 15, 18:15 UTCJul 15, 19:50 UTC1h 35m
2026-07-15 TFX41 SYD → BNE Jul 15, 12:50 UTCJul 15, 14:00 UTC1h 10m
2026-07-15 TFX34 ADL → SYD Jul 15, 10:00 UTCJul 15, 11:45 UTC1h 45m
2026-07-14 TFX36 MEL → ADL Jul 14, 18:15 UTCJul 14, 19:15 UTC1h 0m
2026-07-14 TFX42 BNE → MEL Jul 14, 14:55 UTCJul 14, 16:55 UTC2h 0m
2026-07-14 TFX402 SYD → BNE Jul 14, 12:05 UTCJul 14, 13:15 UTC1h 10m
2026-07-14 TFX49 - Jul 14, 09:40 UTCJul 14, 10:25 UTC45m
2026-07-13 TFX52 - Jul 13, 18:35 UTCJul 13, 20:05 UTC1h 30m
2026-07-13 TFX41 SYD → BNE Jul 13, 13:00 UTCJul 13, 14:15 UTC1h 15m
2026-07-13 TFX34 ADL → SYD Jul 13, 10:00 UTCJul 13, 11:40 UTC1h 40m
2026-07-09 TFX36 MEL → ADL Jul 9, 18:05 UTCJul 9, 19:05 UTC1h 0m
2026-07-09 TFX42 BNE → MEL Jul 9, 15:05 UTCJul 9, 17:00 UTC1h 55m
2026-07-09 TFX41 SYD → BNE Jul 9, 12:40 UTCJul 9, 13:55 UTC1h 15m
2026-07-09 TFX34 ADL → SYD Jul 9, 09:40 UTCJul 9, 11:15 UTC1h 35m
2026-07-08 TFX36 MEL → ADL Jul 8, 17:45 UTCJul 8, 18:40 UTC55m
2026-07-08 TFX42 BNE → MEL Jul 8, 14:45 UTCJul 8, 16:45 UTC2h 0m
2026-07-08 TFX402 SYD → BNE Jul 8, 11:45 UTCJul 8, 12:55 UTC1h 10m
2026-07-08 TFX49 - Jul 8, 09:35 UTCJul 8, 10:10 UTC35m
2026-07-07 TFX52 - Jul 7, 18:15 UTCJul 7, 19:50 UTC1h 35m
2026-07-07 TFX23 - Jul 7, 15:20 UTCJul 7, 17:05 UTC1h 45m
2026-07-07 TFX11 PER → MEL Jul 7, 11:00 UTCJul 7, 14:10 UTC3h 10m
2026-07-07 TFX576 - Jul 7, 06:40 UTCJul 7, 07:20 UTC40m
2026-07-07 TFX576 - Jul 7, 03:40 UTCJul 7, 03:50 UTC10m
2026-07-06 TFX52 - Jul 6, 18:25 UTCJul 6, 19:55 UTC1h 30m
2026-07-06 TFX41 SYD → BNE Jul 6, 12:55 UTCJul 6, 14:10 UTC1h 15m
2026-07-06 TFX34 ADL → SYD Jul 6, 09:55 UTCJul 6, 11:30 UTC1h 35m
2026-07-02 TFX36 MEL → ADL Jul 2, 18:45 UTCJul 2, 19:50 UTC1h 5m
2026-07-02 TFX42 BNE → MEL Jul 2, 15:40 UTCJul 2, 17:55 UTC2h 15m
2026-07-02 TFX51 - Jul 2, 09:30 UTCJul 2, 09:55 UTC25m
2026-07-02 TFX51 - Jul 2, 06:35 UTCJul 2, 06:45 UTC10m
2026-07-01 TFX52 - Jul 1, 18:20 UTCJul 1, 19:45 UTC1h 25m
2026-07-01 TFX23 MEL → BNE Jul 1, 15:05 UTCJul 1, 17:00 UTC1h 55m

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 Jul 24, 09:10 UTC.
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 20 distinct callsigns, including TFX34, TFX41, TFX42, TFX36, TFX12.