sensors Mode-S transponder
C81D32
ICAO 24-bit transponder address · allocated to New Zealand
Currently assigned to ZK-MTR · DIAMOND DA-42 Guardian
- Hex
- C81D32
- Octal
- 62016462
- Decimal
- 13,114,674
- Country
- NZ
- Tail
- ZK-MTR
- Type
- DA42
- Flights observed
- 63
- Distinct callsigns
- 14
- Country
- NZ
- Last broadcast
- 10h ago
Last known position
Country allocation
The ICAO 24-bit address C81D32 falls within the block assigned to New Zealand (NZ) by ICAO Annex 10, Volume III. Every aircraft registered in New Zealand 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 14 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| MSY208 | - | 10 | 2026-07-07 |
| MSY292 | - | 9 | 2026-06-09 |
| MSY084 | - | 8 | 2026-07-04 |
| MSY604 | - | 6 | 2026-07-11 |
| MSY120 | - | 6 | 2026-06-19 |
| MSY30 | - | 5 | 2026-07-13 |
| MSY284 | - | 4 | 2026-07-07 |
| MSY124 | - | 4 | 2026-07-14 |
| MSY89 | - | 3 | 2026-07-11 |
| MSY58 | - | 2 | 2026-07-13 |
| MSY207 | - | 2 | 2026-07-07 |
| MSY16 | - | 2 | 2026-07-03 |
| MSY27 | - | 1 | 2026-06-13 |
| MSY14 | - | 1 | 2026-04-27 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | MSY124 | PMR → PMR | Jul 14, 01:25 UTC | Jul 14, 02:20 UTC | 55m |
| 2026-07-13 | MSY58 | - | Jul 13, 21:10 UTC | Jul 13, 22:00 UTC | 50m |
| 2026-07-13 | MSY58 | - | Jul 13, 19:40 UTC | Jul 13, 20:35 UTC | 55m |
| 2026-07-13 | MSY30 | - | Jul 13, 01:05 UTC | Jul 13, 02:35 UTC | 1h 30m |
| 2026-07-11 | MSY89 | - | Jul 11, 22:45 UTC | Jul 12, 00:10 UTC | 1h 25m |
| 2026-07-11 | MSY604 | PMR → PMR | Jul 11, 03:25 UTC | Jul 11, 04:45 UTC | 1h 20m |
| 2026-07-11 | MSY124 | - | Jul 11, 01:40 UTC | Jul 11, 01:55 UTC | 15m |
| 2026-07-11 | MSY124 | - | Jul 11, 00:30 UTC | Jul 11, 00:50 UTC | 20m |
| 2026-07-10 | MSY89 | - | Jul 10, 22:15 UTC | Jul 10, 23:10 UTC | 55m |
| 2026-07-07 | MSY284 | - | Jul 7, 21:20 UTC | Jul 7, 22:45 UTC | 1h 25m |
| 2026-07-07 | MSY208 | - | Jul 7, 04:25 UTC | Jul 7, 04:40 UTC | 15m |
| 2026-07-07 | MSY208 | - | Jul 7, 02:25 UTC | Jul 7, 03:35 UTC | 1h 10m |
| 2026-07-07 | MSY207 | - | Jul 7, 00:25 UTC | Jul 7, 01:20 UTC | 55m |
| 2026-07-06 | MSY207 | - | Jul 6, 23:10 UTC | Jul 7, 00:10 UTC | 1h 0m |
| 2026-07-05 | MSY30 | - | Jul 5, 21:35 UTC | Jul 5, 22:50 UTC | 1h 15m |
| 2026-07-04 | MSY084 | - | Jul 4, 21:10 UTC | Jul 4, 22:15 UTC | 1h 5m |
| 2026-07-03 | MSY604 | - | Jul 3, 23:50 UTC | Jul 4, 01:10 UTC | 1h 20m |
| 2026-07-03 | MSY16 | - | Jul 3, 03:40 UTC | Jul 3, 04:40 UTC | 1h 0m |
| 2026-07-03 | MSY89 | PMR → PMR | Jul 3, 00:10 UTC | Jul 3, 01:10 UTC | 1h 0m |
| 2026-07-02 | MSY16 | - | Jul 2, 22:40 UTC | Jul 2, 22:55 UTC | 15m |
| 2026-06-19 | MSY120 | - | Jun 19, 01:50 UTC | Jun 19, 02:59 UTC | 1h 10m |
| 2026-06-18 | MSY208 | PMR → PMR | Jun 18, 22:15 UTC | Jun 19, 00:14 UTC | 1h 59m |
| 2026-06-18 | MSY284 | - | Jun 18, 04:00 UTC | Jun 18, 05:05 UTC | 1h 5m |
| 2026-06-16 | MSY084 | PMR → PMR | Jun 16, 21:45 UTC | Jun 16, 22:40 UTC | 55m |
| 2026-06-15 | MSY30 | - | Jun 15, 01:20 UTC | Jun 15, 01:35 UTC | 15m |
| 2026-06-14 | MSY30 | - | Jun 14, 23:44 UTC | Jun 15, 00:15 UTC | 30m |
| 2026-06-13 | MSY27 | - | Jun 13, 01:50 UTC | Jun 13, 02:55 UTC | 1h 5m |
| 2026-06-11 | MSY084 | - | Jun 11, 01:45 UTC | Jun 11, 03:00 UTC | 1h 15m |
| 2026-06-10 | MSY208 | - | Jun 10, 02:55 UTC | Jun 10, 04:25 UTC | 1h 30m |
| 2026-06-09 | MSY292 | - | Jun 9, 22:25 UTC | Jun 9, 23:30 UTC | 1h 5m |
| 2026-06-09 | MSY120 | PMR → PMR | Jun 9, 03:10 UTC | Jun 9, 04:05 UTC | 55m |
| 2026-06-08 | MSY124 | - | Jun 8, 23:10 UTC | Jun 9, 00:10 UTC | 1h 0m |
| 2026-06-03 | MSY084 | - | Jun 3, 04:45 UTC | Jun 3, 05:05 UTC | 20m |
| 2026-06-03 | MSY084 | - | Jun 3, 03:40 UTC | Jun 3, 03:50 UTC | 10m |
| 2026-06-03 | MSY120 | PMR → PMR | Jun 3, 01:15 UTC | Jun 3, 02:10 UTC | 55m |
| 2026-05-30 | MSY30 | - | May 30, 23:15 UTC | May 31, 00:25 UTC | 1h 10m |
| 2026-05-30 | MSY284 | NPL → PMR | May 30, 03:25 UTC | May 30, 04:15 UTC | 50m |
| 2026-05-30 | MSY284 | - | May 30, 01:55 UTC | May 30, 02:55 UTC | 1h 0m |
| 2026-05-29 | MSY292 | - | May 29, 02:40 UTC | May 29, 03:35 UTC | 55m |
| 2026-05-29 | MSY292 | - | May 29, 01:55 UTC | May 29, 02:05 UTC | 10m |
| 2026-05-28 | MSY120 | PMR → PMR | May 28, 22:05 UTC | May 28, 23:30 UTC | 1h 25m |
| 2026-05-27 | MSY604 | - | May 27, 03:24 UTC | May 27, 04:34 UTC | 1h 10m |
| 2026-05-21 | MSY604 | - | May 21, 22:00 UTC | May 21, 23:20 UTC | 1h 20m |
| 2026-05-20 | MSY208 | - | May 20, 01:45 UTC | May 20, 02:10 UTC | 25m |
| 2026-05-20 | MSY208 | - | May 20, 00:40 UTC | May 20, 01:00 UTC | 20m |
| 2026-05-19 | MSY292 | - | May 19, 00:00 UTC | May 19, 01:25 UTC | 1h 25m |
| 2026-05-07 | MSY292 | - | May 7, 04:25 UTC | May 7, 04:40 UTC | 15m |
| 2026-05-07 | MSY292 | - | May 7, 02:45 UTC | May 7, 03:20 UTC | 35m |
| 2026-05-05 | MSY120 | - | May 5, 03:20 UTC | May 5, 04:20 UTC | 1h 0m |
| 2026-05-04 | MSY084 | - | May 4, 00:05 UTC | May 4, 01:15 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-MTR page for operator, model, and routing details .