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sensors Mode-S transponder

C023C9

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-FNOI · BOEING 787-9 Dreamliner · operated by Air Canada

Hex
C023C9
Octal
60021711
Decimal
12,592,073
Country
CA
Tail
C-FNOI
Type
B789
Broadcasting now · callsign ACA029 · 25,775 ft
Flights observed
295
Distinct callsigns
20
Country
CA
Last broadcast
Jul 26, 19:55 UTC

Current position

C023C9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C023C9 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 20 distinct

Callsign Airline Flights Last seen
ACA025 - 17 2026-07-14
ACA7 - 14 2026-07-17
ACA3 - 14 2026-07-15
ACA026 - 14 2026-07-15
ACA8 - 11 2026-07-18
ACA64 - 10 2026-07-01
ACA63 - 10 2026-06-30
ACA029 Air Canada 10 2026-05-07
ACA4 - 9 2026-07-16
ACA62 Air Canada 8 2026-07-05
ACA61 - 8 2026-07-04
ACA839 - 6 2026-07-10
ACA801 Air Canada 6 2026-07-21
ACA342 Air Canada 6 2026-07-18
ACA303 - 6 2026-06-24
ACA10 Air Canada 6 2026-07-22
ACA9 Air Canada 5 2026-07-21
ACA881 Air Canada 5 2026-05-26
ACA851 Air Canada 5 2026-07-20
ACA838 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ACA877 LYS → YUL Jul 26, 12:40 UTCJul 26, 19:55 UTC7h 15m
2026-07-26 ACA876 YUL → LYS Jul 26, 03:45 UTCJul 26, 04:15 UTC30m
2026-07-26 ACA876 YUL → LYS Jul 26, 03:45 UTCJul 26, 10:10 UTC6h 25m
2026-07-25 ACA865 LHR → YUL Jul 25, 13:35 UTCJul 25, 19:55 UTC6h 20m
2026-07-25 ACA864 YUL → LHR Jul 25, 03:00 UTCJul 25, 08:55 UTC5h 55m
2026-07-24 ACA308 YVR → YUL Jul 24, 20:25 UTCJul 25, 00:25 UTC4h 0m
2026-07-24 ACA107 YYZ → YVR Jul 24, 13:25 UTCJul 24, 17:55 UTC4h 30m
2026-07-23 ACA028 ICN → YYZ Jul 23, 10:20 UTCJul 24, 04:20 UTC18h 0m
2026-07-23 ACA028 ICN → YYZ Jul 23, 04:20 UTCJul 24, 04:15 UTC23h 55m
2026-07-23 ACA028 ICN → YYZ Jul 23, 02:20 UTCJul 24, 02:15 UTC23h 55m
2026-07-23 ACA027 ICN → PVG Jul 23, 01:00 UTCJul 24, 00:15 UTC23h 15m
2026-07-22 ACA027 ICN → PVG Jul 22, 22:25 UTCJul 23, 22:15 UTC23h 50m
2026-07-22 ACA10 NRT → YYZ Jul 22, 08:45 UTCJul 22, 19:40 UTC10h 55m
2026-07-21 ACA10 NRT → YYZ Jul 21, 23:30 UTCJul 22, 19:45 UTC20h 15m
2026-07-21 ACA10 NRT → YYZ Jul 21, 18:20 UTCJul 22, 18:15 UTC23h 55m
2026-07-21 ACA9 YYZ → NRT Jul 21, 18:05 UTCJul 22, 16:15 UTC22h 10m
2026-07-21 ACA801 DUB → YYZ Jul 21, 08:35 UTCJul 21, 15:05 UTC6h 30m
2026-07-21 ACA916 YUL → DUB Jul 21, 01:40 UTCJul 21, 07:00 UTC5h 20m
2026-07-21 ACA916 YUL → DUB Jul 21, 01:38 UTCJul 21, 06:51 UTC5h 13m
2026-07-20 ACA326 YYC → YUL Jul 20, 20:00 UTCJul 20, 23:15 UTC3h 15m
2026-07-20 ACA851 LHR → YYC Jul 20, 17:35 UTCJul 20, 18:00 UTC25m
2026-07-20 ACA851 LHR → YYC Jul 20, 09:45 UTCJul 20, 17:30 UTC7h 45m
2026-07-20 ACA851 LHR → YYC Jul 20, 09:43 UTCJul 20, 17:54 UTC8h 11m
2026-07-20 ACA856 YYZ → LHR Jul 20, 01:05 UTCJul 20, 07:40 UTC6h 35m
2026-07-19 ACA186 YYC → YUL Jul 19, 16:10 UTCJul 19, 19:45 UTC3h 35m
2026-07-18 ACA345 YOW → YVR Jul 18, 23:40 UTCJul 19, 04:40 UTC5h 0m
2026-07-18 ACA342 YVR → YOW Jul 18, 17:00 UTCJul 18, 21:20 UTC4h 20m
2026-07-18 ACA342 YVR → YOW Jul 18, 17:01 UTCJul 18, 21:09 UTC4h 8m
2026-07-18 ACA8 - Jul 18, 14:10 UTCJul 18, 14:20 UTC10m
2026-07-18 ACA8 HKG → YVR Jul 18, 02:25 UTCJul 18, 13:54 UTC11h 29m
2026-07-18 ACA8 HKG → YVR Jul 18, 02:25 UTCJul 18, 14:20 UTC11h 56m
2026-07-17 ACA7 - Jul 17, 20:35 UTCJul 17, 20:50 UTC15m
2026-07-17 ACA7 YVR → HKG Jul 17, 08:33 UTCJul 17, 20:12 UTC11h 39m
2026-07-17 ACA7 YVR → HKG Jul 17, 08:35 UTCJul 17, 20:50 UTC12h 15m
2026-07-16 ACA4 - Jul 16, 08:15 UTCJul 16, 16:44 UTC8h 30m
2026-07-15 ACA3 YVR → NRT Jul 15, 20:29 UTCJul 16, 05:21 UTC8h 52m
2026-07-15 ACA3 YVR → NRT Jul 15, 20:30 UTCJul 16, 05:35 UTC9h 5m
2026-07-15 ACA026 - Jul 15, 03:00 UTCJul 15, 18:30 UTC15h 30m
2026-07-14 ACA026 - Jul 14, 22:20 UTCJul 15, 18:30 UTC20h 9m
2026-07-14 ACA025 - Jul 14, 20:45 UTCJul 15, 18:30 UTC21h 44m
2026-07-14 ACA025 - Jul 14, 18:40 UTCJul 15, 18:15 UTC23h 34m
2026-07-14 ACA4 - Jul 14, 08:10 UTCJul 14, 16:25 UTC8h 15m
2026-07-13 ACA3 - Jul 13, 20:35 UTCJul 14, 05:50 UTC9h 15m
2026-07-13 ACA4 NRT → YVR Jul 13, 10:20 UTCJul 13, 18:45 UTC8h 25m
2026-07-12 ACA3 - Jul 12, 23:30 UTCJul 13, 08:35 UTC9h 5m
2026-07-12 ACA3 YVR → NRT Jul 12, 23:28 UTCJul 13, 08:19 UTC8h 51m
2026-07-12 ACA026 - Jul 12, 06:01 UTCJul 12, 21:25 UTC15h 25m
2026-07-11 ACA025 - Jul 11, 22:20 UTCJul 12, 21:25 UTC23h 5m
2026-07-11 ACA025 - Jul 11, 21:50 UTCJul 12, 13:35 UTC15h 45m
2026-07-11 ACA4 - Jul 11, 08:01 UTCJul 11, 16:25 UTC8h 25m

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

Mode-S C023C9 frequently asked

What is Mode-S code C023C9?
C023C9 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FNOI.
Where is Mode-S C023C9 registered?
Mode-S code C023C9 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C023C9 broadcasting right now?
Yes. Mode-S C023C9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C023C9, octal 60021711, decimal 12,592,073.
What flights does C023C9 operate?
Mode-S C023C9 has broadcast 20 distinct callsigns, including ACA025, ACA7, ACA3, ACA026, ACA8.