Apparatus

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sensors Mode-S transponder

C023B7

ICAO 24-bit transponder address · allocated to Canada

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

Hex
C023B7
Octal
60021667
Decimal
12,592,055
Country
CA
Tail
C-FNNQ
Type
B77W
Transponder active on ground
Flights observed
144
Distinct callsigns
14
Country
CA
Last broadcast
23m ago

Last known position

Most recent position reported by Mode-S C023B7.

Country allocation

The ICAO 24-bit address C023B7 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
ACA6 Air Canada 21 2026-05-26
ACA5 Air Canada 20 2026-05-25
ACA871 Air Canada 16 2026-05-29
ACA870 Air Canada 15 2026-05-29
ACA893 Air Canada 13 2026-05-19
ACA892 Air Canada 13 2026-05-18
ACA874 Air Canada 10 2026-05-24
ACA304 Air Canada 10 2026-05-28
ACA311 Air Canada 9 2026-05-29
ACA875 Air Canada 8 2026-05-25
ACA922 Air Canada 3 2026-04-22
ACA923 Air Canada 2 2026-04-22
ACA899 Air Canada 2 2026-05-22
ACA898 Air Canada 2 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ACA311 YUL → YVR May 29, 23:25 UTCMay 30, 03:45 UTC4h 20m
2026-05-29 ACA871 CDG → YUL May 29, 13:45 UTCMay 29, 20:30 UTC6h 45m
2026-05-29 ACA871 CDG → YUL May 29, 13:44 UTCMay 29, 20:18 UTC6h 34m
2026-05-29 ACA870 YUL → CDG May 29, 01:50 UTCMay 29, 08:15 UTC6h 25m
2026-05-28 ACA304 YVR → YUL May 28, 16:43 UTCMay 28, 20:52 UTC4h 9m
2026-05-28 ACA304 YVR → YUL May 28, 16:45 UTCMay 28, 21:05 UTC4h 20m
2026-05-27 ACA311 YUL → YVR May 27, 22:20 UTCMay 28, 02:50 UTC4h 30m
2026-05-27 ACA871 CDG → YUL May 27, 12:50 UTCMay 27, 19:30 UTC6h 40m
2026-05-27 ACA870 YUL → CDG May 27, 02:39 UTCMay 27, 09:15 UTC6h 35m
2026-05-26 ACA6 NRT → YUL May 26, 09:15 UTCMay 26, 21:00 UTC11h 45m
2026-05-25 ACA5 YUL → NRT May 25, 17:30 UTCMay 25, 17:45 UTC15m
2026-05-25 ACA5 YUL → NRT May 25, 17:30 UTCMay 26, 05:38 UTC12h 8m
2026-05-25 ACA875 CDG → YUL May 25, 07:55 UTCMay 25, 14:45 UTC6h 50m
2026-05-24 ACA874 YUL → CDG May 24, 23:00 UTCMay 25, 05:00 UTC6h 0m
2026-05-24 ACA871 CDG → YUL May 24, 12:30 UTCMay 24, 19:25 UTC6h 55m
2026-05-24 ACA870 YUL → CDG May 24, 01:50 UTCMay 24, 07:55 UTC6h 5m
2026-05-23 ACA304 YVR → YUL May 23, 19:09 UTCMay 23, 23:06 UTC3h 57m
2026-05-23 ACA304 YVR → YUL May 23, 19:10 UTCMay 23, 23:20 UTC4h 10m
2026-05-22 ACA311 YUL → YVR May 22, 22:15 UTCMay 23, 03:00 UTC4h 44m
2026-05-22 ACA899 ATH → YUL May 22, 09:25 UTCMay 22, 18:30 UTC9h 5m
2026-05-21 ACA898 YUL → ATH May 21, 22:50 UTCMay 22, 07:00 UTC8h 10m
2026-05-21 ACA871 CDG → YUL May 21, 13:15 UTCMay 21, 20:05 UTC6h 50m
2026-05-21 ACA870 YUL → CDG May 21, 06:05 UTCMay 21, 07:40 UTC1h 35m
2026-05-21 ACA870 YUL → CDG May 21, 01:50 UTCMay 21, 02:40 UTC50m
2026-05-20 ACA6 NRT → YUL May 20, 11:50 UTCMay 20, 19:45 UTC7h 55m
2026-05-20 ACA6 NRT → YUL May 20, 11:49 UTCMay 20, 22:53 UTC11h 4m
2026-05-19 ACA5 YUL → NRT May 19, 21:10 UTCMay 20, 09:45 UTC12h 36m
2026-05-19 ACA5 YUL → NRT May 19, 21:07 UTCMay 20, 09:38 UTC12h 31m
2026-05-19 ACA893 FCO → YUL May 19, 10:10 UTCMay 19, 18:15 UTC8h 5m
2026-05-19 ACA893 FCO → YUL May 19, 10:05 UTCMay 19, 18:01 UTC7h 56m
2026-05-18 ACA892 YUL → FCO May 18, 23:40 UTCMay 19, 06:42 UTC7h 2m
2026-05-18 ACA892 YUL → FCO May 18, 23:45 UTCMay 19, 06:50 UTC7h 5m
2026-05-18 ACA6 NRT → YUL May 18, 09:00 UTCMay 18, 20:35 UTC11h 34m
2026-05-17 ACA5 YUL → NRT May 17, 17:45 UTCMay 18, 06:25 UTC12h 40m
2026-05-17 ACA875 CDG → YUL May 17, 08:00 UTCMay 17, 15:01 UTC7h 0m
2026-05-16 ACA874 YUL → CDG May 16, 22:35 UTCMay 17, 04:45 UTC6h 10m
2026-05-16 ACA871 CDG → YUL May 16, 12:31 UTCMay 16, 19:35 UTC7h 5m
2026-05-16 ACA870 YUL → CDG May 16, 02:15 UTCMay 16, 08:36 UTC6h 21m
2026-05-15 ACA6 NRT → YUL May 15, 08:55 UTCMay 15, 20:55 UTC11h 59m
2026-05-14 ACA5 YUL → NRT May 14, 17:30 UTCMay 15, 05:40 UTC12h 10m
2026-05-14 ACA5 YUL → NRT May 14, 17:29 UTCMay 15, 05:34 UTC12h 5m
2026-05-14 ACA875 CDG → YUL May 14, 07:50 UTCMay 14, 14:40 UTC6h 50m
2026-05-13 ACA874 YUL → CDG May 13, 22:40 UTCMay 14, 04:55 UTC6h 15m
2026-05-13 ACA874 YUL → CDG May 13, 22:38 UTCMay 14, 04:47 UTC6h 9m
2026-05-13 ACA893 FCO → YUL May 13, 09:45 UTCMay 13, 17:50 UTC8h 5m
2026-05-13 ACA893 FCO → YUL May 13, 09:43 UTCMay 13, 17:41 UTC7h 58m
2026-05-12 ACA892 YUL → FCO May 12, 23:35 UTCMay 13, 07:00 UTC7h 25m
2026-05-12 ACA6 NRT → YUL May 12, 08:50 UTCMay 12, 20:35 UTC11h 45m
2026-05-11 ACA5 YUL → NRT May 11, 17:40 UTCMay 12, 06:35 UTC12h 55m
2026-05-11 ACA5 YUL → NRT May 11, 17:39 UTCMay 12, 06:29 UTC12h 50m

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

Mode-S C023B7 frequently asked

What is Mode-S code C023B7?
C023B7 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FNNQ.
Where is Mode-S C023B7 registered?
Mode-S code C023B7 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C023B7 broadcasting right now?
Mode-S C023B7 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C023B7, octal 60021667, decimal 12,592,055.
What flights does C023B7 operate?
Mode-S C023B7 has broadcast 14 distinct callsigns, including ACA6, ACA5, ACA871, ACA870, ACA893.