sensors Mode-S transponder
C823FD
ICAO 24-bit transponder address · allocated to New Zealand
Currently assigned to ZK-IRO · AIRBUS HELICOPTERS EC-120
- Hex
- C823FD
- Octal
- 62021775
- Decimal
- 13,116,413
- Country
- NZ
- Tail
- ZK-IRO
- Type
- EC20
- Flights observed
- 30
- Distinct callsigns
- 1
- Country
- NZ
- Last broadcast
- Jul 12, 22:50 UTC
Last known position
Country allocation
The ICAO 24-bit address C823FD 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 |
|---|---|---|---|
| ZKHGT | - | 30 | 2026-07-12 |
Recent flights last 30
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-12 | ZKHGT | - | Jul 12, 22:25 UTC | Jul 12, 22:50 UTC | 25m |
| 2026-07-12 | ZKHGT | - | Jul 12, 03:05 UTC | Jul 12, 03:35 UTC | 30m |
| 2026-07-01 | ZKHGT | - | Jul 1, 06:25 UTC | Jul 1, 08:25 UTC | 2h 0m |
| 2026-06-30 | ZKHGT | - | Jun 30, 06:35 UTC | Jun 30, 07:35 UTC | 1h 0m |
| 2026-06-30 | ZKHGT | - | Jun 30, 04:35 UTC | Jun 30, 05:15 UTC | 40m |
| 2026-06-29 | ZKHGT | - | Jun 29, 20:44 UTC | Jun 29, 21:19 UTC | 35m |
| 2026-06-29 | ZKHGT | - | Jun 29, 06:50 UTC | Jun 29, 07:34 UTC | 45m |
| 2026-06-29 | ZKHGT | - | Jun 29, 06:09 UTC | Jun 29, 06:19 UTC | 10m |
| 2026-06-15 | ZKHGT | - | Jun 15, 01:55 UTC | Jun 15, 02:39 UTC | 45m |
| 2026-06-14 | ZKHGT | - | Jun 14, 22:20 UTC | Jun 14, 22:55 UTC | 35m |
| 2026-06-14 | ZKHGT | - | Jun 14, 21:20 UTC | Jun 14, 21:45 UTC | 25m |
| 2026-06-12 | ZKHGT | - | Jun 12, 03:05 UTC | Jun 12, 03:40 UTC | 35m |
| 2026-06-11 | ZKHGT | - | Jun 11, 21:10 UTC | Jun 11, 21:40 UTC | 30m |
| 2026-06-10 | ZKHGT | - | Jun 10, 04:15 UTC | Jun 10, 04:50 UTC | 35m |
| 2026-06-09 | ZKHGT | - | Jun 9, 20:20 UTC | Jun 9, 20:55 UTC | 35m |
| 2026-05-30 | ZKHGT | - | May 30, 22:20 UTC | May 30, 22:40 UTC | 20m |
| 2026-05-30 | ZKHGT | - | May 30, 03:40 UTC | May 30, 04:10 UTC | 30m |
| 2026-05-29 | ZKHGT | - | May 29, 22:55 UTC | May 29, 23:05 UTC | 10m |
| 2026-05-23 | ZKHGT | - | May 23, 22:15 UTC | May 23, 22:45 UTC | 30m |
| 2026-05-16 | ZKHGT | - | May 16, 23:50 UTC | May 17, 00:30 UTC | 40m |
| 2026-05-15 | ZKHGT | - | May 15, 20:25 UTC | May 15, 21:05 UTC | 40m |
| 2026-05-15 | ZKHGT | - | May 15, 04:25 UTC | May 15, 05:15 UTC | 50m |
| 2026-05-14 | ZKHGT | - | May 14, 20:10 UTC | May 14, 20:55 UTC | 45m |
| 2026-05-09 | ZKHGT | - | May 9, 03:15 UTC | May 9, 03:45 UTC | 30m |
| 2026-05-07 | ZKHGT | - | May 7, 01:15 UTC | May 7, 01:30 UTC | 15m |
| 2026-04-27 | ZKHGT | - | Apr 27, 02:50 UTC | Apr 27, 03:10 UTC | 20m |
| 2026-04-26 | ZKHGT | - | Apr 26, 04:10 UTC | Apr 26, 04:25 UTC | 15m |
| 2026-04-26 | ZKHGT | - | Apr 26, 03:05 UTC | Apr 26, 03:15 UTC | 10m |
| 2026-04-25 | ZKHGT | - | Apr 25, 01:40 UTC | Apr 25, 02:00 UTC | 20m |
| 2026-04-24 | ZKHGT | - | Apr 24, 22:50 UTC | Apr 24, 23:05 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-IRO page for operator, model, and routing details .