sensors Mode-S transponder
C81BD2
ICAO 24-bit transponder address · allocated to New Zealand
Currently assigned to ZK-JMR · CESSNA 172 Skyhawk
- Hex
- C81BD2
- Octal
- 62015722
- Decimal
- 13,114,322
- Country
- NZ
- Tail
- ZK-JMR
- Type
- C172
- Flights observed
- 51
- Distinct callsigns
- 1
- Country
- NZ
- Last broadcast
- Jul 24, 04:15 UTC
Last known position
Country allocation
The ICAO 24-bit address C81BD2 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| ZKJMR | - | 51 | 2026-07-24 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | ZKJMR | - | Jul 24, 02:10 UTC | Jul 24, 04:15 UTC | 2h 5m |
| 2026-07-23 | ZKJMR | - | Jul 23, 23:10 UTC | Jul 24, 01:05 UTC | 1h 55m |
| 2026-07-23 | ZKJMR | - | Jul 23, 03:00 UTC | Jul 23, 03:25 UTC | 25m |
| 2026-07-22 | ZKJMR | - | Jul 22, 21:45 UTC | Jul 22, 23:35 UTC | 1h 50m |
| 2026-07-21 | ZKJMR | - | Jul 21, 21:25 UTC | Jul 22, 00:10 UTC | 2h 45m |
| 2026-07-21 | ZKJMR | - | Jul 21, 03:55 UTC | Jul 21, 04:40 UTC | 45m |
| 2026-07-21 | ZKJMR | - | Jul 21, 00:30 UTC | Jul 21, 01:25 UTC | 55m |
| 2026-07-20 | ZKJMR | - | Jul 20, 02:50 UTC | Jul 20, 03:40 UTC | 50m |
| 2026-07-20 | ZKJMR | - | Jul 20, 01:05 UTC | Jul 20, 01:35 UTC | 30m |
| 2026-07-17 | ZKJMR | - | Jul 17, 02:30 UTC | Jul 17, 04:39 UTC | 2h 10m |
| 2026-07-16 | ZKJMR | - | Jul 16, 23:20 UTC | Jul 17, 00:35 UTC | 1h 15m |
| 2026-07-16 | ZKJMR | - | Jul 16, 02:15 UTC | Jul 16, 02:50 UTC | 35m |
| 2026-07-16 | ZKJMR | - | Jul 16, 00:50 UTC | Jul 16, 01:25 UTC | 35m |
| 2026-07-13 | ZKJMR | - | Jul 13, 04:25 UTC | Jul 13, 05:40 UTC | 1h 15m |
| 2026-07-03 | ZKJMR | - | Jul 3, 02:35 UTC | Jul 3, 04:20 UTC | 1h 45m |
| 2026-07-03 | ZKJMR | - | Jul 3, 00:00 UTC | Jul 3, 01:45 UTC | 1h 45m |
| 2026-07-02 | ZKJMR | - | Jul 2, 01:55 UTC | Jul 2, 03:15 UTC | 1h 20m |
| 2026-07-01 | ZKJMR | - | Jul 1, 21:35 UTC | Jul 1, 22:55 UTC | 1h 20m |
| 2026-06-30 | ZKJMR | - | Jun 30, 03:50 UTC | Jun 30, 04:25 UTC | 35m |
| 2026-06-30 | ZKJMR | - | Jun 30, 01:14 UTC | Jun 30, 01:45 UTC | 31m |
| 2026-06-24 | ZKJMR | - | Jun 24, 01:49 UTC | Jun 24, 02:24 UTC | 35m |
| 2026-06-24 | ZKJMR | - | Jun 24, 00:20 UTC | Jun 24, 01:14 UTC | 55m |
| 2026-06-23 | ZKJMR | - | Jun 23, 04:00 UTC | Jun 23, 04:39 UTC | 40m |
| 2026-06-23 | ZKJMR | - | Jun 23, 01:30 UTC | Jun 23, 02:09 UTC | 40m |
| 2026-06-22 | ZKJMR | - | Jun 22, 04:19 UTC | Jun 22, 04:44 UTC | 25m |
| 2026-06-22 | ZKJMR | - | Jun 22, 01:35 UTC | Jun 22, 02:14 UTC | 40m |
| 2026-06-19 | ZKJMR | - | Jun 19, 02:39 UTC | Jun 19, 03:49 UTC | 1h 10m |
| 2026-06-19 | ZKJMR | - | Jun 19, 00:49 UTC | Jun 19, 01:39 UTC | 50m |
| 2026-06-18 | ZKJMR | - | Jun 18, 21:55 UTC | Jun 18, 22:55 UTC | 1h 0m |
| 2026-06-18 | ZKJMR | - | Jun 18, 02:35 UTC | Jun 18, 03:45 UTC | 1h 10m |
| 2026-06-18 | ZKJMR | - | Jun 18, 00:55 UTC | Jun 18, 01:40 UTC | 45m |
| 2026-06-12 | ZKJMR | - | Jun 12, 21:55 UTC | Jun 12, 22:30 UTC | 35m |
| 2026-06-03 | ZKJMR | - | Jun 3, 02:35 UTC | Jun 3, 04:15 UTC | 1h 40m |
| 2026-05-28 | ZKJMR | - | May 28, 02:50 UTC | May 28, 04:35 UTC | 1h 45m |
| 2026-05-25 | ZKJMR | - | May 25, 01:55 UTC | May 25, 03:30 UTC | 1h 35m |
| 2026-05-22 | ZKJMR | - | May 22, 00:35 UTC | May 22, 03:45 UTC | 3h 10m |
| 2026-05-19 | ZKJMR | - | May 19, 01:50 UTC | May 19, 04:05 UTC | 2h 15m |
| 2026-05-15 | ZKJMR | - | May 15, 04:20 UTC | May 15, 04:45 UTC | 25m |
| 2026-05-12 | ZKJMR | - | May 12, 02:55 UTC | May 12, 03:05 UTC | 10m |
| 2026-05-11 | ZKJMR | - | May 11, 03:25 UTC | May 11, 03:55 UTC | 30m |
| 2026-05-11 | ZKJMR | - | May 11, 01:45 UTC | May 11, 02:15 UTC | 30m |
| 2026-05-07 | ZKJMR | - | May 7, 02:30 UTC | May 7, 04:05 UTC | 1h 35m |
| 2026-05-06 | ZKJMR | - | May 6, 21:25 UTC | May 6, 23:20 UTC | 1h 55m |
| 2026-05-04 | ZKJMR | - | May 4, 23:05 UTC | May 5, 00:10 UTC | 1h 5m |
| 2026-05-02 | ZKJMR | - | May 2, 03:05 UTC | May 2, 04:30 UTC | 1h 25m |
| 2026-05-01 | ZKJMR | - | May 1, 23:10 UTC | May 2, 00:45 UTC | 1h 35m |
| 2026-05-01 | ZKJMR | - | May 1, 01:40 UTC | May 1, 03:40 UTC | 2h 0m |
| 2026-04-28 | ZKJMR | - | Apr 28, 21:55 UTC | Apr 28, 22:30 UTC | 35m |
| 2026-04-28 | ZKJMR | - | Apr 28, 05:05 UTC | Apr 28, 05:20 UTC | 15m |
| 2026-04-27 | ZKJMR | - | Apr 27, 22:15 UTC | Apr 27, 23:00 UTC | 45m |
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-JMR page for operator, model, and routing details .