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 9h ago
Flights observed
104
Distinct callsigns
20
Country
NZ
Last broadcast
9h 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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ANZ953 NAN → AKL May 29, 22:15 UTCMay 30, 05:10 UTC6h 55m
2026-05-29 ANZ23 YVR → AKL May 29, 04:30 UTCMay 29, 17:55 UTC13h 25m
2026-05-28 ANZ24 AKL → YVR May 28, 08:30 UTCMay 28, 20:40 UTC12h 10m
2026-05-27 ANZ953 NAN → AKL May 27, 22:40 UTCMay 28, 05:20 UTC6h 40m
2026-05-27 ANZ5 LAX → AKL May 27, 05:19 UTCMay 27, 17:45 UTC12h 25m
2026-05-26 ANZ6 AKL → LAX May 26, 08:39 UTCMay 26, 20:15 UTC11h 35m
2026-05-26 ANZ122 MEL → AKL May 26, 03:05 UTCMay 26, 06:04 UTC3h 0m
2026-05-25 ANZ121 AKL → MEL May 25, 21:19 UTCMay 26, 01:05 UTC3h 45m
2026-05-25 ANZ5 LAX → AKL May 25, 05:30 UTCMay 25, 17:55 UTC12h 25m
2026-05-24 ANZ6 AKL → LAX May 24, 08:35 UTCMay 24, 19:35 UTC11h 0m
2026-05-23 ANZ945 RAR → AKL May 23, 21:10 UTCMay 24, 06:05 UTC8h 55m
2026-05-23 ANZ23 YVR → AKL May 23, 04:15 UTCMay 23, 17:20 UTC13h 5m
2026-05-22 ANZ24 AKL → YVR May 22, 12:20 UTCMay 23, 00:35 UTC12h 15m
2026-05-17 ANZ5 LAX → AKL May 17, 05:40 UTCMay 17, 17:45 UTC12h 5m
2026-05-16 ANZ6 AKL → LAX May 16, 09:35 UTCMay 16, 21:00 UTC11h 25m
2026-05-16 ANZ122 MEL → AKL May 16, 03:55 UTCMay 16, 07:05 UTC3h 11m
2026-05-15 ANZ121 AKL → MEL May 15, 22:40 UTCMay 16, 02:05 UTC3h 25m
2026-05-15 ANZ29 IAH → AKL May 15, 03:15 UTCMay 15, 17:20 UTC14h 4m
2026-05-14 ANZ28 AKL → IAH May 14, 08:10 UTCMay 14, 20:50 UTC12h 40m
2026-05-14 ANZ146 BNE → AKL May 14, 02:40 UTCMay 14, 05:25 UTC2h 45m
2026-05-13 ANZ145 AKL → BNE May 13, 21:45 UTCMay 14, 00:40 UTC2h 55m
2026-05-13 ANZ281 SIN → AKL May 13, 07:35 UTCMay 13, 10:35 UTC3h 0m
2026-05-12 ANZ281 SIN → AKL May 12, 15:05 UTCMay 13, 10:35 UTC19h 30m
2026-05-12 ANZ281 SIN → AKL May 12, 13:10 UTCMay 13, 10:35 UTC21h 25m
2026-05-11 ANZ281 SIN → AKL May 11, 16:35 UTCMay 12, 11:10 UTC18h 36m
2026-05-11 ANZ281 SIN → AKL May 11, 16:15 UTCMay 12, 11:10 UTC18h 56m
2026-05-11 ANZ281 SIN → AKL May 11, 14:05 UTCMay 12, 11:10 UTC21h 6m
2026-05-11 ANZ281 SIN → AKL May 11, 03:25 UTCMay 11, 12:05 UTC8h 40m
2026-05-10 ANZ282 AKL → SIN May 10, 14:34 UTCMay 11, 12:05 UTC21h 30m
2026-05-10 ANZ282 AKL → SIN May 10, 12:34 UTCMay 11, 12:05 UTC23h 30m
2026-05-10 ANZ282 AKL → SIN May 10, 12:10 UTCMay 11, 10:00 UTC21h 50m
2026-05-09 ANZ281 SIN → AKL May 9, 14:35 UTCMay 10, 09:45 UTC19h 10m
2026-05-09 ANZ281 SIN → AKL May 9, 12:35 UTCMay 10, 09:45 UTC21h 10m
2026-05-09 ANZ281 SIN → AKL May 9, 12:15 UTCMay 10, 09:45 UTC21h 30m
2026-05-08 ANZ282 AKL → SIN May 8, 14:50 UTCMay 9, 09:50 UTC19h 0m
2026-05-08 ANZ282 AKL → SIN May 8, 12:10 UTCMay 9, 09:50 UTC21h 40m
2026-05-07 ANZ282 AKL → SIN May 7, 14:55 UTCMay 8, 09:30 UTC18h 35m
2026-05-07 ANZ282 AKL → SIN May 7, 12:05 UTCMay 8, 09:30 UTC21h 25m
2026-05-06 ANZ953 NAN → AKL May 6, 23:25 UTCMay 7, 06:05 UTC6h 40m
2026-05-06 ANZ90 NRT → AKL May 6, 11:25 UTCMay 6, 21:25 UTC9h 59m
2026-05-05 ANZ99 AKL → NRT May 5, 22:50 UTCMay 6, 09:10 UTC10h 20m
2026-05-04 ANZ3 LAX → AKL May 4, 04:55 UTCMay 4, 17:30 UTC12h 35m
2026-05-03 ANZ4 AKL → LAX May 3, 07:40 UTCMay 3, 18:25 UTC10h 45m
2026-05-03 ANZ104 SYD → AKL May 3, 02:10 UTCMay 3, 04:45 UTC2h 34m
2026-05-02 ANZ103 AKL → SYD May 2, 21:30 UTCMay 3, 00:20 UTC2h 50m
2026-05-01 ANZ290 AKL → DPS May 1, 23:35 UTCMay 2, 17:20 UTC17h 46m
2026-05-01 ANZ90 NRT → AKL May 1, 11:35 UTCMay 1, 21:30 UTC9h 55m
2026-04-30 ANZ99 AKL → NRT Apr 30, 22:35 UTCMay 1, 08:55 UTC10h 20m
2026-04-30 ANZ5 LAX → AKL Apr 30, 17:25 UTCApr 30, 18:00 UTC35m
2026-04-30 ANZ5 LAX → AKL Apr 30, 05:30 UTCApr 30, 05:50 UTC20m

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 9h 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, ANZ99, ANZ90, ANZ282, ANZ175.