Apparatus

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sensors Mode-S transponder

C023BD

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-FNNW · BOEING 777-300ER · operated by Air Canada

Hex
C023BD
Octal
60021675
Decimal
12,592,061
Country
CA
Tail
C-FNNW
Type
B77W
No current signal · last broadcast 4h ago
Flights observed
126
Distinct callsigns
14
Country
CA
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S C023BD.

Country allocation

The ICAO 24-bit address C023BD falls within the block assigned to Canada (CA) by ICAO Annex 10, Volume III. Every aircraft registered in Canada 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 14 distinct

Callsign Airline Flights Last seen
ACA874 Air Canada 13 2026-05-28
ACA871 Air Canada 13 2026-05-25
ACA893 Air Canada 12 2026-05-20
ACA5 Air Canada 12 2026-05-29
ACA870 Air Canada 11 2026-05-25
ACA311 Air Canada 11 2026-05-23
ACA304 Air Canada 11 2026-05-24
ACA875 Air Canada 10 2026-05-29
ACA892 Air Canada 8 2026-05-19
ACA6 Air Canada 8 2026-05-27
ACA899 Air Canada 6 2026-05-23
ACA898 Air Canada 6 2026-05-22
ACA922 Air Canada 3 2026-04-25
ACA923 Air Canada 2 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ACA5 YUL → NRT May 29, 17:10 UTCMay 29, 23:55 UTC6h 45m
2026-05-29 ACA875 CDG → YUL May 29, 07:40 UTCMay 29, 14:25 UTC6h 45m
2026-05-28 ACA874 YUL → CDG May 28, 22:45 UTCMay 29, 05:05 UTC6h 20m
2026-05-27 ACA6 NRT → YUL May 27, 09:25 UTCMay 27, 21:20 UTC11h 55m
2026-05-26 ACA5 YUL → NRT May 26, 17:15 UTCMay 27, 06:09 UTC12h 55m
2026-05-26 ACA875 CDG → YUL May 26, 07:40 UTCMay 26, 14:20 UTC6h 40m
2026-05-25 ACA874 YUL → CDG May 25, 22:34 UTCMay 26, 04:50 UTC6h 15m
2026-05-25 ACA871 CDG → YUL May 25, 13:10 UTCMay 25, 20:04 UTC6h 54m
2026-05-25 ACA870 YUL → CDG May 25, 02:00 UTCMay 25, 08:15 UTC6h 15m
2026-05-24 ACA304 YVR → YUL May 24, 16:15 UTCMay 24, 19:00 UTC2h 45m
2026-05-24 ACA304 YVR → YUL May 24, 16:12 UTCMay 24, 20:12 UTC4h 0m
2026-05-23 ACA311 YUL → YVR May 23, 22:10 UTCMay 24, 03:00 UTC4h 50m
2026-05-23 ACA899 ATH → YUL May 23, 17:45 UTCMay 23, 18:50 UTC1h 5m
2026-05-23 ACA899 ATH → YUL May 23, 09:30 UTCMay 23, 17:40 UTC8h 10m
2026-05-22 ACA898 YUL → ATH May 22, 22:33 UTCMay 23, 06:40 UTC8h 7m
2026-05-22 ACA898 YUL → ATH May 22, 22:35 UTCMay 23, 06:55 UTC8h 19m
2026-05-22 ACA871 CDG → YUL May 22, 12:40 UTCMay 22, 19:20 UTC6h 40m
2026-05-22 ACA870 YUL → CDG May 22, 02:00 UTCMay 22, 07:45 UTC5h 45m
2026-05-21 ACA304 YVR → YUL May 21, 16:25 UTCMay 21, 20:35 UTC4h 10m
2026-05-20 ACA311 YUL → YVR May 20, 22:20 UTCMay 21, 03:05 UTC4h 45m
2026-05-20 ACA311 YUL → YVR May 20, 22:19 UTCMay 21, 02:56 UTC4h 37m
2026-05-20 ACA893 FCO → YUL May 20, 10:10 UTCMay 20, 11:15 UTC1h 5m
2026-05-20 ACA893 FCO → YUL May 20, 10:06 UTCMay 20, 18:16 UTC8h 10m
2026-05-19 ACA892 YUL → FCO May 19, 23:40 UTCMay 20, 06:45 UTC7h 6m
2026-05-19 ACA875 CDG → YUL May 19, 07:45 UTCMay 19, 14:35 UTC6h 50m
2026-05-18 ACA874 YUL → CDG May 18, 22:40 UTCMay 19, 04:55 UTC6h 15m
2026-05-18 ACA871 CDG → YUL May 18, 12:45 UTCMay 18, 19:30 UTC6h 44m
2026-05-18 ACA870 YUL → CDG May 18, 01:55 UTCMay 18, 08:01 UTC6h 5m
2026-05-17 ACA304 YVR → YUL May 17, 16:10 UTCMay 17, 20:20 UTC4h 10m
2026-05-16 ACA311 YUL → YVR May 16, 22:10 UTCMay 17, 02:55 UTC4h 45m
2026-05-16 ACA893 FCO → YUL May 16, 10:05 UTCMay 16, 18:25 UTC8h 20m
2026-05-15 ACA892 YUL → FCO May 15, 23:50 UTCMay 16, 07:05 UTC7h 16m
2026-05-15 ACA304 YVR → YUL May 15, 16:26 UTCMay 15, 20:25 UTC3h 59m
2026-05-15 ACA304 YVR → YUL May 15, 16:30 UTCMay 15, 20:35 UTC4h 5m
2026-05-14 ACA311 YUL → YVR May 14, 22:20 UTCMay 15, 03:05 UTC4h 45m
2026-05-14 ACA899 ATH → YUL May 14, 09:45 UTCMay 14, 19:10 UTC9h 25m
2026-05-13 ACA898 YUL → ATH May 13, 23:00 UTCMay 14, 07:25 UTC8h 25m
2026-05-13 ACA871 CDG → YUL May 13, 19:10 UTCMay 13, 20:05 UTC55m
2026-05-13 ACA871 CDG → YUL May 13, 13:05 UTCMay 13, 19:05 UTC6h 0m
2026-05-13 ACA870 YUL → CDG May 13, 02:10 UTCMay 13, 08:35 UTC6h 25m
2026-05-12 ACA899 ATH → YUL May 12, 11:05 UTCMay 12, 20:44 UTC9h 39m
2026-05-12 ACA899 ATH → YUL May 12, 11:05 UTCMay 12, 11:15 UTC10m
2026-05-12 ACA898 YUL → ATH May 12, 05:00 UTCMay 12, 08:30 UTC3h 30m
2026-05-12 ACA898 YUL → ATH May 12, 00:17 UTCMay 12, 08:18 UTC8h 1m
2026-05-11 ACA871 CDG → YUL May 11, 12:25 UTCMay 11, 19:20 UTC6h 55m
2026-05-11 ACA870 YUL → CDG May 11, 02:00 UTCMay 11, 08:15 UTC6h 15m
2026-05-10 ACA6 NRT → YUL May 10, 08:40 UTCMay 10, 19:54 UTC11h 15m
2026-05-09 ACA5 YUL → NRT May 9, 17:15 UTCMay 10, 05:50 UTC12h 35m
2026-05-09 ACA875 CDG → YUL May 9, 07:45 UTCMay 9, 14:35 UTC6h 50m
2026-05-08 ACA874 YUL → CDG May 8, 22:45 UTCMay 9, 05:15 UTC6h 30m

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 C-FNNW page for operator, model, and routing details .

Mode-S C023BD frequently asked

What is Mode-S code C023BD?
C023BD is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FNNW.
Where is Mode-S C023BD registered?
Mode-S code C023BD is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C023BD broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C023BD, octal 60021675, decimal 12,592,061.
What flights does C023BD operate?
Mode-S C023BD has broadcast 14 distinct callsigns, including ACA874, ACA871, ACA893, ACA5, ACA870.