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 5h ago
- Flights observed
- 214
- Distinct callsigns
- 20
- Country
- -
- Last broadcast
- 5h ago
Last known position
Callsign history 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| TFX34 | - | 19 | 2026-07-13 |
| TFX42 | - | 18 | 2026-07-14 |
| TFX41 | - | 18 | 2026-07-13 |
| TFX36 | - | 17 | 2026-07-14 |
| TFX12 | - | 15 | 2026-06-30 |
| TFX52 | - | 14 | 2026-07-13 |
| TFX49 | - | 12 | 2026-07-14 |
| TFX23 | - | 12 | 2026-07-07 |
| TFX22 | - | 12 | 2026-06-30 |
| TFX21 | - | 12 | 2026-06-30 |
| TFX11 | - | 12 | 2026-07-07 |
| TFX94 | - | 11 | 2026-06-30 |
| TFX402 | - | 11 | 2026-07-14 |
| TFX93 | - | 10 | 2026-06-30 |
| TFX53 | - | 8 | 2026-06-19 |
| TFX51 | - | 3 | 2026-07-02 |
| ASY1220 | - | 3 | 2026-06-13 |
| TST1 | - | 2 | 2026-04-24 |
| TFX576 | - | 2 | 2026-07-07 |
| TFX96 | - | 1 | 2026-05-01 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | TFX36 | MEL → ADL | Jul 14, 18:15 UTC | Jul 14, 19:15 UTC | 1h 0m |
| 2026-07-14 | TFX42 | BNE → MEL | Jul 14, 14:55 UTC | Jul 14, 16:55 UTC | 2h 0m |
| 2026-07-14 | TFX402 | SYD → BNE | Jul 14, 12:05 UTC | Jul 14, 13:15 UTC | 1h 10m |
| 2026-07-14 | TFX49 | - | Jul 14, 09:40 UTC | Jul 14, 10:25 UTC | 45m |
| 2026-07-13 | TFX52 | - | Jul 13, 18:35 UTC | Jul 13, 20:05 UTC | 1h 30m |
| 2026-07-13 | TFX41 | SYD → BNE | Jul 13, 13:00 UTC | Jul 13, 14:15 UTC | 1h 15m |
| 2026-07-13 | TFX34 | ADL → SYD | Jul 13, 10:00 UTC | Jul 13, 11:40 UTC | 1h 40m |
| 2026-07-09 | TFX36 | MEL → ADL | Jul 9, 18:05 UTC | Jul 9, 19:05 UTC | 1h 0m |
| 2026-07-09 | TFX42 | BNE → MEL | Jul 9, 15:05 UTC | Jul 9, 17:00 UTC | 1h 55m |
| 2026-07-09 | TFX41 | SYD → BNE | Jul 9, 12:40 UTC | Jul 9, 13:55 UTC | 1h 15m |
| 2026-07-09 | TFX34 | ADL → SYD | Jul 9, 09:40 UTC | Jul 9, 11:15 UTC | 1h 35m |
| 2026-07-08 | TFX36 | MEL → ADL | Jul 8, 17:45 UTC | Jul 8, 18:40 UTC | 55m |
| 2026-07-08 | TFX42 | BNE → MEL | Jul 8, 14:45 UTC | Jul 8, 16:45 UTC | 2h 0m |
| 2026-07-08 | TFX402 | SYD → BNE | Jul 8, 11:45 UTC | Jul 8, 12:55 UTC | 1h 10m |
| 2026-07-08 | TFX49 | - | Jul 8, 09:35 UTC | Jul 8, 10:10 UTC | 35m |
| 2026-07-07 | TFX52 | - | Jul 7, 18:15 UTC | Jul 7, 19:50 UTC | 1h 35m |
| 2026-07-07 | TFX23 | - | Jul 7, 15:20 UTC | Jul 7, 17:05 UTC | 1h 45m |
| 2026-07-07 | TFX11 | PER → MEL | Jul 7, 11:00 UTC | Jul 7, 14:10 UTC | 3h 10m |
| 2026-07-07 | TFX576 | - | Jul 7, 06:40 UTC | Jul 7, 07:20 UTC | 40m |
| 2026-07-07 | TFX576 | - | Jul 7, 03:40 UTC | Jul 7, 03:50 UTC | 10m |
| 2026-07-06 | TFX52 | - | Jul 6, 18:25 UTC | Jul 6, 19:55 UTC | 1h 30m |
| 2026-07-06 | TFX41 | SYD → BNE | Jul 6, 12:55 UTC | Jul 6, 14:10 UTC | 1h 15m |
| 2026-07-06 | TFX34 | ADL → SYD | Jul 6, 09:55 UTC | Jul 6, 11:30 UTC | 1h 35m |
| 2026-07-02 | TFX36 | MEL → ADL | Jul 2, 18:45 UTC | Jul 2, 19:50 UTC | 1h 5m |
| 2026-07-02 | TFX42 | BNE → MEL | Jul 2, 15:40 UTC | Jul 2, 17:55 UTC | 2h 15m |
| 2026-07-02 | TFX51 | - | Jul 2, 09:30 UTC | Jul 2, 09:55 UTC | 25m |
| 2026-07-02 | TFX51 | - | Jul 2, 06:35 UTC | Jul 2, 06:45 UTC | 10m |
| 2026-07-01 | TFX52 | - | Jul 1, 18:20 UTC | Jul 1, 19:45 UTC | 1h 25m |
| 2026-07-01 | TFX23 | MEL → BNE | Jul 1, 15:05 UTC | Jul 1, 17:00 UTC | 1h 55m |
| 2026-07-01 | TFX11 | PER → MEL | Jul 1, 11:05 UTC | Jul 1, 14:10 UTC | 3h 5m |
| 2026-06-30 | TFX12 | - | Jun 30, 18:20 UTC | Jun 30, 21:55 UTC | 3h 35m |
| 2026-06-30 | TFX94 | - | Jun 30, 16:55 UTC | Jun 30, 17:35 UTC | 40m |
| 2026-06-30 | TFX93 | - | Jun 30, 14:50 UTC | Jun 30, 15:25 UTC | 35m |
| 2026-06-30 | TFX22 | SYD → MEL | Jun 30, 12:50 UTC | Jun 30, 14:00 UTC | 1h 10m |
| 2026-06-30 | TFX21 | BNE → SYD | Jun 30, 09:50 UTC | Jun 30, 11:05 UTC | 1h 15m |
| 2026-06-29 | TFX23 | MEL → BNE | Jun 29, 15:34 UTC | Jun 29, 17:30 UTC | 1h 55m |
| 2026-06-29 | TFX11 | PER → MEL | Jun 29, 10:59 UTC | Jun 29, 14:04 UTC | 3h 5m |
| 2026-06-25 | TFX12 | - | Jun 25, 21:35 UTC | Jun 25, 22:04 UTC | 30m |
| 2026-06-25 | TFX12 | - | Jun 25, 18:24 UTC | Jun 25, 19:34 UTC | 1h 10m |
| 2026-06-25 | TFX94 | - | Jun 25, 16:55 UTC | Jun 25, 17:30 UTC | 35m |
| 2026-06-25 | TFX93 | - | Jun 25, 14:59 UTC | Jun 25, 15:29 UTC | 30m |
| 2026-06-25 | TFX22 | SYD → MEL | Jun 25, 12:44 UTC | Jun 25, 13:50 UTC | 1h 5m |
| 2026-06-25 | TFX21 | BNE → SYD | Jun 25, 10:04 UTC | Jun 25, 11:10 UTC | 1h 5m |
| 2026-06-24 | TFX23 | - | Jun 24, 15:09 UTC | Jun 24, 16:59 UTC | 1h 50m |
| 2026-06-24 | TFX11 | PER → MEL | Jun 24, 10:55 UTC | Jun 24, 14:09 UTC | 3h 15m |
| 2026-06-23 | TFX12 | MEL → PER | Jun 23, 18:14 UTC | Jun 23, 21:39 UTC | 3h 25m |
| 2026-06-23 | TFX94 | - | Jun 23, 16:50 UTC | Jun 23, 17:20 UTC | 30m |
| 2026-06-23 | TFX93 | - | Jun 23, 15:04 UTC | Jun 23, 15:40 UTC | 35m |
| 2026-06-23 | TFX22 | - | Jun 23, 12:45 UTC | Jun 23, 13:59 UTC | 1h 15m |
| 2026-06-23 | TFX21 | - | Jun 23, 09:49 UTC | Jun 23, 10:59 UTC | 1h 10m |
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 5h 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.