sensors Mode-S transponder
C81CE3
ICAO 24-bit transponder address · allocated to New Zealand
Currently assigned to ZK-MTY · PIPER PA-23-250 Aztec
- Hex
- C81CE3
- Octal
- 62016343
- Decimal
- 13,114,595
- Country
- NZ
- Tail
- ZK-MTY
- Type
- PA27
- Flights observed
- 47
- Distinct callsigns
- 4
- Country
- NZ
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address C81CE3 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 4 distinct
Recent flights last 47
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | SAV12Y | - | Jul 14, 04:20 UTC | Jul 14, 04:45 UTC | 25m |
| 2026-07-14 | SAV12Y | - | Jul 14, 02:50 UTC | Jul 14, 03:25 UTC | 35m |
| 2026-07-14 | SAV12Y | - | Jul 14, 01:45 UTC | Jul 14, 02:15 UTC | 30m |
| 2026-07-14 | SAV12Y | - | Jul 14, 00:10 UTC | Jul 14, 01:10 UTC | 1h 0m |
| 2026-06-16 | SAV12Y | - | Jun 16, 03:39 UTC | Jun 16, 04:55 UTC | 1h 15m |
| 2026-06-16 | SAV12Y | - | Jun 16, 02:54 UTC | Jun 16, 03:05 UTC | 10m |
| 2026-06-15 | SAV12Y | - | Jun 15, 20:50 UTC | Jun 15, 22:10 UTC | 1h 20m |
| 2026-06-15 | SAV12Y | - | Jun 15, 00:24 UTC | Jun 15, 01:15 UTC | 50m |
| 2026-06-08 | SAV13Y | - | Jun 8, 21:45 UTC | Jun 8, 22:35 UTC | 50m |
| 2026-06-08 | SAV13Y | - | Jun 8, 20:40 UTC | Jun 8, 20:55 UTC | 15m |
| 2026-06-08 | SAV13Y | - | Jun 8, 20:10 UTC | Jun 8, 20:30 UTC | 20m |
| 2026-06-07 | SAV13Y | - | Jun 7, 20:30 UTC | Jun 7, 20:45 UTC | 15m |
| 2026-06-07 | SAV13Y | - | Jun 7, 19:40 UTC | Jun 7, 19:55 UTC | 15m |
| 2026-06-04 | SAV11Y | - | Jun 4, 05:05 UTC | Jun 4, 05:20 UTC | 15m |
| 2026-06-04 | SAV11Y | - | Jun 4, 03:35 UTC | Jun 4, 03:55 UTC | 20m |
| 2026-05-13 | SAV11Y | - | May 13, 01:50 UTC | May 13, 02:20 UTC | 30m |
| 2026-05-12 | SAV11Y | - | May 12, 19:45 UTC | May 12, 22:01 UTC | 2h 15m |
| 2026-05-10 | SAV11Y | - | May 10, 20:35 UTC | May 10, 21:10 UTC | 35m |
| 2026-05-10 | SAV11Y | - | May 10, 19:30 UTC | May 10, 19:54 UTC | 25m |
| 2026-05-08 | SAV11Y | - | May 8, 02:09 UTC | May 8, 02:49 UTC | 40m |
| 2026-05-08 | SAV11Y | - | May 8, 00:34 UTC | May 8, 00:54 UTC | 20m |
| 2026-05-07 | SAV11Y | - | May 7, 21:30 UTC | May 7, 22:20 UTC | 50m |
| 2026-05-07 | SAV13Y | - | May 7, 04:10 UTC | May 7, 04:30 UTC | 20m |
| 2026-05-07 | SAV13Y | - | May 7, 03:35 UTC | May 7, 04:00 UTC | 25m |
| 2026-05-06 | SAV12Y | - | May 6, 20:30 UTC | May 6, 20:50 UTC | 20m |
| 2026-05-06 | SAV12Y | - | May 6, 03:30 UTC | May 6, 03:45 UTC | 15m |
| 2026-05-05 | SAV12Y | - | May 5, 20:30 UTC | May 5, 20:50 UTC | 20m |
| 2026-05-04 | SAV19Y | - | May 4, 03:45 UTC | May 4, 04:05 UTC | 20m |
| 2026-05-03 | SAV19Y | - | May 3, 20:45 UTC | May 3, 21:05 UTC | 20m |
| 2026-05-03 | SAV19Y | - | May 3, 19:34 UTC | May 3, 20:25 UTC | 50m |
| 2026-04-28 | SAV19Y | - | Apr 28, 22:45 UTC | Apr 28, 22:55 UTC | 10m |
| 2026-04-28 | SAV19Y | - | Apr 28, 20:50 UTC | Apr 28, 21:15 UTC | 25m |
| 2026-04-24 | SAV12Y | - | Apr 24, 21:55 UTC | Apr 24, 22:25 UTC | 30m |
| 2026-04-24 | SAV12Y | - | Apr 24, 05:05 UTC | Apr 24, 07:15 UTC | 2h 10m |
| 2026-04-23 | SAV12Y | - | Apr 23, 22:20 UTC | Apr 23, 23:05 UTC | 45m |
| 2026-04-23 | SAV12Y | - | Apr 23, 20:35 UTC | Apr 23, 21:20 UTC | 45m |
| 2026-04-22 | SAV12Y | - | Apr 22, 01:20 UTC | Apr 22, 02:15 UTC | 55m |
| 2026-04-22 | SAV12Y | - | Apr 22, 00:00 UTC | Apr 22, 00:45 UTC | 45m |
| 2026-04-21 | SAV12Y | - | Apr 21, 22:35 UTC | Apr 21, 22:55 UTC | 20m |
| 2026-04-20 | SAV12Y | - | Apr 20, 03:45 UTC | Apr 20, 04:00 UTC | 15m |
| 2026-04-20 | SAV11Y | - | Apr 20, 02:00 UTC | Apr 20, 02:45 UTC | 45m |
| 2026-04-19 | SAV11Y | - | Apr 19, 22:30 UTC | Apr 19, 23:20 UTC | 50m |
| 2026-04-15 | SAV19Y | - | Apr 15, 03:30 UTC | Apr 15, 04:05 UTC | 35m |
| 2026-04-13 | SAV12Y | - | Apr 13, 21:55 UTC | Apr 13, 23:00 UTC | 1h 5m |
| 2026-04-13 | SAV12Y | - | Apr 13, 20:35 UTC | Apr 13, 20:45 UTC | 10m |
| 2026-04-13 | SAV12Y | - | Apr 13, 04:00 UTC | Apr 13, 04:15 UTC | 15m |
| 2026-04-12 | SAV11Y | - | Apr 12, 19:25 UTC | Apr 12, 19:40 UTC | 15m |
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-MTY page for operator, model, and routing details .