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sensors Mode-S transponder

C0173A

ICAO 24-bit transponder address · allocated to Canada

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

Hex
C0173A
Octal
60013472
Decimal
12,588,858
Country
CA
Tail
C-FIUR
Type
B77W
Broadcasting now · callsign ACA873 · 10,775 ft
Flights observed
230
Distinct callsigns
20
Country
CA
Last broadcast
Jul 26, 17:55 UTC

Current position

C0173A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C0173A 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
ACA820 - 21 2026-07-13
ACA821 - 20 2026-07-13
ACA2 - 15 2026-07-19
ACA891 - 14 2026-07-17
ACA890 Air Canada 14 2026-07-17
ACA1 Air Canada 12 2026-07-18
ACA854 Air Canada 11 2026-07-17
ACA859 - 10 2026-06-28
ACA858 - 10 2026-06-28
ACA853 - 10 2026-07-18
ACA185 - 9 2026-07-20
ACA114 - 8 2026-07-20
ACA873 - 7 2026-07-15
ACA855 - 7 2026-07-10
ACA852 - 7 2026-07-10
ACA810 Air Canada 7 2026-07-21
ACA897 - 6 2026-07-16
ACA896 - 6 2026-07-15
ACA872 - 6 2026-07-15
ACA811 - 6 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ACA803 GVA → YUL Jul 26, 10:50 UTCJul 26, 17:55 UTC7h 5m
2026-07-26 ACA802 YUL → BRU Jul 26, 01:50 UTCJul 26, 08:15 UTC6h 26m
2026-07-25 ACA803 GVA → YUL Jul 25, 11:05 UTCJul 25, 18:05 UTC7h 0m
2026-07-25 ACA802 YUL → BRU Jul 25, 01:20 UTCJul 25, 07:50 UTC6h 30m
2026-07-24 ACA803 - Jul 24, 11:00 UTCJul 24, 18:20 UTC7h 20m
2026-07-24 ACA802 YUL → BRU Jul 24, 01:15 UTCJul 24, 07:35 UTC6h 20m
2026-07-23 ACA803 GVA → YUL Jul 23, 11:00 UTCJul 23, 18:20 UTC7h 20m
2026-07-23 ACA802 YUL → BRU Jul 23, 01:35 UTCJul 23, 08:15 UTC6h 40m
2026-07-22 ACA488 YYZ → YUL Jul 22, 20:50 UTCJul 22, 21:45 UTC55m
2026-07-22 ACA887 - Jul 22, 11:20 UTCJul 22, 17:25 UTC6h 5m
2026-07-21 ACA886 YYZ → VIE Jul 21, 22:46 UTCJul 22, 06:29 UTC7h 43m
2026-07-21 ACA886 YYZ → VIE Jul 21, 22:50 UTCJul 22, 05:25 UTC6h 35m
2026-07-21 ACA811 LIS → YYZ Jul 21, 12:45 UTCJul 21, 19:50 UTC7h 5m
2026-07-21 ACA810 YYZ → LIS Jul 21, 03:55 UTCJul 21, 10:20 UTC6h 25m
2026-07-20 ACA114 - Jul 20, 21:20 UTCJul 21, 00:55 UTC3h 34m
2026-07-20 ACA185 YYZ → YVR Jul 20, 12:30 UTCJul 20, 16:52 UTC4h 22m
2026-07-20 ACA185 - Jul 20, 12:30 UTCJul 20, 16:30 UTC4h 0m
2026-07-19 ACA2 HND → YYZ Jul 19, 09:25 UTCJul 19, 21:01 UTC11h 36m
2026-07-19 ACA2 - Jul 19, 09:25 UTCJul 19, 10:10 UTC45m
2026-07-18 ACA1 YYZ → HND Jul 18, 17:35 UTCJul 19, 06:10 UTC12h 35m
2026-07-18 ACA853 LHR → YYZ Jul 18, 07:45 UTCJul 18, 14:50 UTC7h 5m
2026-07-17 ACA854 YYZ → LHR Jul 17, 23:00 UTCJul 18, 05:40 UTC6h 41m
2026-07-17 ACA891 - Jul 17, 10:44 UTCJul 17, 12:30 UTC1h 45m
2026-07-17 ACA891 FCO → YYZ Jul 17, 10:39 UTCJul 17, 19:01 UTC8h 22m
2026-07-17 ACA890 YYZ → FCO Jul 17, 00:25 UTCJul 17, 08:20 UTC7h 55m
2026-07-16 ACA891 FCO → YYZ Jul 16, 14:34 UTCJul 16, 23:25 UTC8h 51m
2026-07-16 ACA897 - Jul 16, 10:59 UTCJul 16, 14:15 UTC3h 15m
2026-07-15 ACA896 YYZ → ATH Jul 15, 22:50 UTCJul 16, 07:45 UTC8h 55m
2026-07-15 ACA873 - Jul 15, 11:15 UTCJul 15, 18:30 UTC7h 15m
2026-07-15 ACA873 CDG → YYZ Jul 15, 11:12 UTCJul 15, 18:23 UTC7h 11m
2026-07-15 ACA872 - Jul 15, 01:15 UTCJul 15, 07:55 UTC6h 40m
2026-07-14 ACA897 ATH → YYZ Jul 14, 11:05 UTCJul 14, 20:55 UTC9h 50m
2026-07-13 ACA896 YYZ → ATH Jul 13, 23:00 UTCJul 14, 08:10 UTC9h 10m
2026-07-13 ACA821 BCN → YYZ Jul 13, 11:40 UTCJul 13, 19:30 UTC7h 50m
2026-07-13 ACA820 YYZ → BCN Jul 13, 00:01 UTCJul 13, 07:30 UTC7h 30m
2026-07-12 ACA2 HND → YYZ Jul 12, 09:35 UTCJul 12, 21:00 UTC11h 25m
2026-07-11 ACA1 - Jul 11, 17:35 UTCJul 11, 18:30 UTC55m
2026-07-11 ACA1 YYZ → HND Jul 11, 17:35 UTCJul 12, 05:55 UTC12h 20m
2026-07-11 ACA853 LHR → YYZ Jul 11, 07:50 UTCJul 11, 14:45 UTC6h 55m
2026-07-11 ACA853 LHR → YYZ Jul 11, 07:49 UTCJul 11, 14:48 UTC6h 59m
2026-07-10 ACA854 YYZ → LHR Jul 10, 23:30 UTCJul 11, 05:45 UTC6h 15m
2026-07-10 ACA854 YYZ → LHR Jul 10, 23:31 UTCJul 11, 05:40 UTC6h 9m
2026-07-10 ACA855 LHR → YYZ Jul 10, 13:24 UTCJul 10, 20:32 UTC7h 8m
2026-07-10 ACA855 - Jul 10, 13:25 UTCJul 10, 14:30 UTC1h 5m
2026-07-10 ACA852 YYZ → LHR Jul 10, 04:20 UTCJul 10, 10:40 UTC6h 20m
2026-07-09 ACA891 - Jul 9, 11:40 UTCJul 9, 20:25 UTC8h 45m
2026-07-09 ACA890 - Jul 9, 00:30 UTCJul 9, 02:10 UTC1h 40m
2026-07-09 ACA890 YYZ → FCO Jul 9, 00:29 UTCJul 9, 08:21 UTC7h 52m
2026-07-08 ACA821 BCN → YYZ Jul 8, 12:00 UTCJul 8, 19:50 UTC7h 50m
2026-07-08 ACA821 BCN → YYZ Jul 8, 11:55 UTCJul 8, 19:38 UTC7h 43m

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

Mode-S C0173A frequently asked

What is Mode-S code C0173A?
C0173A is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FIUR.
Where is Mode-S C0173A registered?
Mode-S code C0173A is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C0173A broadcasting right now?
Yes. Mode-S C0173A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C0173A, octal 60013472, decimal 12,588,858.
What flights does C0173A operate?
Mode-S C0173A has broadcast 20 distinct callsigns, including ACA820, ACA821, ACA2, ACA891, ACA890.