Apparatus

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sensors Mode-S transponder

C811DE

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-PDM · CESSNA 208 Caravan

Hex
C811DE
Octal
62010736
Decimal
13,111,774
Country
NZ
Tail
ZK-PDM
Type
C208
No current signal · last broadcast 1d ago
Flights observed
295
Distinct callsigns
20
Country
NZ
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S C811DE.

Country allocation

The ICAO 24-bit address C811DE 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 20 distinct

Callsign Airline Flights Last seen
SDA341 Sounds Air 13 2026-05-28
SDA349 Sounds Air 10 2026-05-27
SDA241 Sounds Air 9 2026-05-27
SDA345 Sounds Air 8 2026-05-29
SDA285 Sounds Air 8 2026-05-27
SDA282 Sounds Air 8 2026-05-09
SDA281 Sounds Air 8 2026-05-18
SDA243 Sounds Air 8 2026-05-28
SDA343 Sounds Air 7 2026-05-18
SDA342 Sounds Air 7 2026-05-27
SDA287 Sounds Air 7 2026-05-28
SDA280 Sounds Air 7 2026-05-18
SDA261 Sounds Air 7 2026-05-28
SDA242 Sounds Air 7 2026-05-27
SDA123 Sounds Air 7 2026-05-23
SDA348 Sounds Air 6 2026-05-25
SDA347 Sounds Air 6 2026-05-26
SDA289 Sounds Air 6 2026-05-14
SDA288 Sounds Air 6 2026-05-27
SDA263 Sounds Air 6 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SDA265 WLG → BHE May 29, 05:30 UTCMay 29, 05:40 UTC10m
2026-05-29 SDA125 WLG → PCN May 29, 03:50 UTCMay 29, 04:00 UTC10m
2026-05-29 SDA345 WLG → NSN May 29, 01:10 UTCMay 29, 01:20 UTC10m
2026-05-28 SDA263 WLG → BHE May 28, 23:10 UTCMay 28, 23:20 UTC10m
2026-05-28 SDA262 BHE → WLG May 28, 22:40 UTCMay 28, 23:00 UTC20m
2026-05-28 SDA261 WLG → BHE May 28, 21:45 UTCMay 28, 21:55 UTC10m
2026-05-28 SDA341 WLG → NSN May 28, 19:05 UTCMay 28, 19:15 UTC10m
2026-05-28 SDA287 WLG → BHE May 28, 06:15 UTCMay 28, 06:25 UTC10m
2026-05-28 SDA244 BHE → WLG May 28, 03:35 UTCMay 28, 04:05 UTC30m
2026-05-28 SDA243 WLG → BHE May 28, 00:00 UTCMay 28, 00:10 UTC10m
2026-05-27 SDA242 BHE → WLG May 27, 21:35 UTCMay 27, 21:45 UTC10m
2026-05-27 SDA241 WLG → BHE May 27, 20:40 UTCMay 27, 20:50 UTC10m
2026-05-27 SDA342 NSN → WLG May 27, 19:30 UTCMay 27, 19:35 UTC5m
2026-05-27 SDA341 WLG → NSN May 27, 18:00 UTCMay 27, 18:10 UTC10m
2026-05-27 SDA350 NSN → WLG May 27, 08:45 UTCMay 27, 09:00 UTC15m
2026-05-27 SDA349 WLG → NSN May 27, 07:20 UTCMay 27, 07:30 UTC10m
2026-05-27 SDA288 BHE → WLG May 27, 06:34 UTCMay 27, 06:44 UTC10m
2026-05-27 SDA286 BHE → WLG May 27, 04:45 UTCMay 27, 04:49 UTC5m
2026-05-27 SDA285 WLG → BHE May 27, 03:39 UTCMay 27, 03:45 UTC5m
2026-05-27 SDA345 WLG → NSN May 27, 00:55 UTCMay 27, 01:05 UTC10m
2026-05-26 SDA341 WLG → NSN May 26, 18:05 UTCMay 26, 18:14 UTC10m
2026-05-26 SDA349 WLG → NSN May 26, 06:54 UTCMay 26, 07:10 UTC15m
2026-05-26 SDA347 WLG → NSN May 26, 04:10 UTCMay 26, 04:24 UTC15m
2026-05-26 SDA124 BHE → WLG May 26, 03:15 UTCMay 26, 03:19 UTC5m
2026-05-26 SDA243 WLG → BHE May 26, 00:04 UTCMay 26, 00:19 UTC15m
2026-05-25 SDA242 BHE → WLG May 25, 21:24 UTCMay 25, 21:35 UTC10m
2026-05-25 SDA241 WLG → BHE May 25, 20:34 UTCMay 25, 20:45 UTC10m
2026-05-25 SDA342 NSN → WLG May 25, 19:35 UTCMay 25, 19:44 UTC10m
2026-05-25 SDA341 WLG → NSN May 25, 18:05 UTCMay 25, 18:10 UTC5m
2026-05-25 SDA352 NSN → WLG May 25, 07:40 UTCMay 25, 07:50 UTC10m
2026-05-25 SDA351 WLG → NSN May 25, 06:10 UTCMay 25, 06:20 UTC10m
2026-05-25 SDA349 WLG → NSN May 25, 03:35 UTCMay 25, 03:45 UTC10m
2026-05-25 SDA348 NSN → WLG May 25, 02:25 UTCMay 25, 02:35 UTC10m
2026-05-24 SDA111 WLG → BHE May 24, 20:25 UTCMay 24, 20:30 UTC5m
2026-05-24 SDA341 WLG → NSN May 24, 18:00 UTCMay 24, 18:10 UTC10m
2026-05-24 SDA255 WLG → BHE May 24, 07:30 UTCMay 24, 07:40 UTC10m
2026-05-24 SDA254 BHE → WLG May 24, 06:45 UTCMay 24, 06:50 UTC5m
2026-05-24 SDA126 PCN → WLG May 24, 04:55 UTCMay 24, 05:15 UTC20m
2026-05-24 SDA125 WLG → PCN May 24, 03:50 UTCMay 24, 04:00 UTC10m
2026-05-24 SDA355 WLG → NSN May 24, 01:20 UTCMay 24, 01:25 UTC5m
2026-05-23 SDA353 WLG → NSN May 23, 22:45 UTCMay 23, 22:55 UTC10m
2026-05-23 SDA351 WLG → NSN May 23, 20:10 UTCMay 23, 20:20 UTC10m
2026-05-23 SDA260 BHE → WLG May 23, 06:35 UTCMay 23, 06:50 UTC15m
2026-05-23 SDA259 WLG → BHE May 23, 05:30 UTCMay 23, 05:40 UTC10m
2026-05-23 SDA124 BHE → WLG May 23, 04:35 UTCMay 23, 04:45 UTC10m
2026-05-23 SDA123 WLG → BHE May 23, 03:35 UTCMay 23, 03:40 UTC5m
2026-05-22 SDA349 WLG → NSN May 22, 07:00 UTCMay 22, 07:05 UTC5m
2026-05-22 SDA348 NSN → WLG May 22, 06:10 UTCMay 22, 06:15 UTC5m
2026-05-22 SDA276 BHE → WLG May 22, 03:45 UTCMay 22, 03:50 UTC5m
2026-05-21 SDA358 NSN → WLG May 21, 23:40 UTCMay 21, 23:45 UTC5m

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-PDM page for operator, model, and routing details .

Mode-S C811DE frequently asked

What is Mode-S code C811DE?
C811DE is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-PDM.
Where is Mode-S C811DE registered?
Mode-S code C811DE is allocated to New Zealand (NZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C811DE broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C811DE, octal 62010736, decimal 13,111,774.
What flights does C811DE operate?
Mode-S C811DE has broadcast 20 distinct callsigns, including SDA341, SDA349, SDA241, SDA345, SDA285.