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sensors Mode-S transponder

C81E22

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-OKQ · BOEING 777-300ER

Hex
C81E22
Octal
62017042
Decimal
13,114,914
Country
NZ
Tail
ZK-OKQ
Type
B77W
No current signal · last broadcast 10h ago
Flights observed
187
Distinct callsigns
20
Country
NZ
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S C81E22.

Country allocation

The ICAO 24-bit address C81E22 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
ANZ281 - 17 2026-07-06
ANZ282 Air New Zealand 16 2026-07-05
ANZ5 - 13 2026-07-14
ANZ6 - 12 2026-07-13
ANZ24 - 9 2026-06-20
ANZ23 - 9 2026-06-21
ANZ99 Air New Zealand 8 2026-05-05
ANZ90 Air New Zealand 8 2026-05-06
ANZ104 - 8 2026-07-11
ANZ103 - 8 2026-07-10
ANZ953 - 7 2026-07-08
ANZ175 Air New Zealand 7 2026-04-28
ANZ945 - 6 2026-06-26
ANZ284 - 6 2026-07-07
ANZ283 - 6 2026-07-08
ANZ176 Air New Zealand 6 2026-04-28
ANZ122 - 6 2026-07-01
ANZ121 - 6 2026-06-30
ANZ145 - 5 2026-06-23
ANZ28 Air New Zealand 4 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ANZ5 - Jul 14, 05:50 UTCJul 14, 06:20 UTC30m
2026-07-13 ANZ6 - Jul 13, 08:30 UTCJul 13, 19:40 UTC11h 10m
2026-07-12 ANZ5 - Jul 12, 05:20 UTCJul 12, 17:35 UTC12h 15m
2026-07-11 ANZ6 - Jul 11, 08:20 UTCJul 11, 19:45 UTC11h 25m
2026-07-11 ANZ104 - Jul 11, 04:45 UTCJul 11, 05:10 UTC25m
2026-07-11 ANZ104 - Jul 11, 02:25 UTCJul 11, 03:01 UTC35m
2026-07-10 ANZ103 - Jul 10, 21:30 UTCJul 11, 00:25 UTC2h 55m
2026-07-10 ANZ5 LAX → AKL Jul 10, 05:35 UTCJul 10, 17:35 UTC12h 0m
2026-07-09 ANZ6 - Jul 9, 09:30 UTCJul 9, 20:50 UTC11h 20m
2026-07-08 ANZ953 - Jul 8, 23:25 UTCJul 9, 06:00 UTC6h 35m
2026-07-08 ANZ283 - Jul 8, 12:10 UTCJul 8, 21:05 UTC8h 55m
2026-07-07 ANZ284 - Jul 7, 22:35 UTCJul 8, 02:55 UTC4h 20m
2026-07-07 ANZ104 SYD → AKL Jul 7, 02:05 UTCJul 7, 04:35 UTC2h 30m
2026-07-06 ANZ103 - Jul 6, 21:35 UTCJul 7, 00:15 UTC2h 40m
2026-07-06 ANZ281 - Jul 6, 07:10 UTCJul 6, 10:00 UTC2h 50m
2026-07-06 ANZ281 - Jul 6, 01:05 UTCJul 6, 01:15 UTC10m
2026-07-05 ANZ282 AKL → SIN Jul 5, 22:25 UTCJul 5, 22:35 UTC10m
2026-07-05 ANZ282 AKL → SIN Jul 5, 12:30 UTCJul 5, 15:30 UTC3h 0m
2026-07-05 ANZ281 - Jul 5, 07:15 UTCJul 5, 10:00 UTC2h 45m
2026-07-04 ANZ282 AKL → SIN Jul 4, 12:30 UTCJul 4, 15:55 UTC3h 25m
2026-07-04 ANZ281 - Jul 4, 07:00 UTCJul 4, 09:35 UTC2h 35m
2026-07-03 ANZ282 AKL → SIN Jul 3, 22:45 UTCJul 3, 22:55 UTC10m
2026-07-03 ANZ282 AKL → SIN Jul 3, 12:20 UTCJul 3, 15:35 UTC3h 15m
2026-07-02 ANZ292 - Jul 2, 10:50 UTCJul 3, 06:30 UTC19h 40m
2026-07-02 ANZ292 - Jul 2, 08:35 UTCJul 3, 06:30 UTC21h 55m
2026-07-01 ANZ903 - Jul 1, 14:30 UTCJul 1, 19:50 UTC5h 20m
2026-07-01 ANZ902 - Jul 1, 08:00 UTCJul 1, 12:15 UTC4h 15m
2026-07-01 ANZ122 MEL → AKL Jul 1, 02:30 UTCJul 1, 05:30 UTC3h 0m
2026-06-30 ANZ121 - Jun 30, 21:10 UTCJul 1, 00:40 UTC3h 30m
2026-06-30 ANZ943 - Jun 30, 08:05 UTCJun 30, 16:40 UTC8h 35m
2026-06-29 ANZ953 - Jun 29, 22:15 UTCJun 30, 05:10 UTC6h 55m
2026-06-29 ANZ5 LAX → AKL Jun 29, 05:40 UTCJun 29, 17:45 UTC12h 5m
2026-06-28 ANZ6 - Jun 28, 09:39 UTCJun 28, 21:14 UTC11h 35m
2026-06-27 ANZ293 - Jun 27, 10:40 UTCJun 28, 06:30 UTC19h 50m
2026-06-27 ANZ292 - Jun 27, 08:39 UTCJun 28, 06:30 UTC21h 50m
2026-06-26 ANZ945 - Jun 26, 21:04 UTCJun 27, 05:55 UTC8h 50m
2026-06-25 ANZ5 LAX → AKL Jun 25, 05:39 UTCJun 25, 18:00 UTC12h 20m
2026-06-24 ANZ6 - Jun 24, 08:39 UTCJun 24, 20:09 UTC11h 30m
2026-06-24 ANZ146 BNE → AKL Jun 24, 03:10 UTCJun 24, 05:40 UTC2h 30m
2026-06-23 ANZ145 - Jun 23, 21:39 UTCJun 24, 01:04 UTC3h 25m
2026-06-23 ANZ5 LAX → AKL Jun 23, 05:29 UTCJun 23, 17:54 UTC12h 25m
2026-06-22 ANZ6 - Jun 22, 08:44 UTCJun 22, 19:54 UTC11h 10m
2026-06-21 ANZ953 - Jun 21, 22:34 UTCJun 22, 05:49 UTC7h 15m
2026-06-21 ANZ23 YVR → AKL Jun 21, 04:20 UTCJun 21, 17:54 UTC13h 35m
2026-06-20 ANZ24 - Jun 20, 08:34 UTCJun 20, 20:49 UTC12h 15m
2026-06-20 ANZ122 MEL → AKL Jun 20, 02:49 UTCJun 20, 05:39 UTC2h 50m
2026-06-19 ANZ121 - Jun 19, 21:24 UTCJun 20, 01:14 UTC3h 50m
2026-06-19 ANZ281 - Jun 19, 07:04 UTCJun 19, 09:49 UTC2h 45m
2026-06-18 ANZ282 AKL → SIN Jun 18, 12:10 UTCJun 18, 16:10 UTC4h 0m
2026-06-17 ANZ945 - Jun 17, 21:25 UTCJun 18, 06:25 UTC9h 0m

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

Mode-S C81E22 frequently asked

What is Mode-S code C81E22?
C81E22 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-OKQ.
Where is Mode-S C81E22 registered?
Mode-S code C81E22 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 C81E22 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81E22, octal 62017042, decimal 13,114,914.
What flights does C81E22 operate?
Mode-S C81E22 has broadcast 20 distinct callsigns, including ANZ281, ANZ282, ANZ5, ANZ6, ANZ24.