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sensors Mode-S transponder

C051E4

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-GFAH · AIRBUS A-330-300 · operated by Air Canada

Hex
C051E4
Octal
60050744
Decimal
12,603,876
Country
CA
Tail
C-GFAH
Type
A333
Broadcasting now · callsign ACA906 · 35,000 ft
Flights observed
251
Distinct callsigns
20
Country
CA
Last broadcast
3h ago

Current position

C051E4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C051E4 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
ACA813 - 14 2026-07-10
ACA895 - 13 2026-07-05
ACA865 - 11 2026-06-18
ACA894 - 9 2026-07-05
ACA864 - 9 2026-06-18
ACA812 - 9 2026-07-10
ACA889 - 8 2026-07-06
ACA888 - 7 2026-07-06
ACA835 - 7 2026-06-29
ACA814 Air Canada 7 2026-06-22
ACA866 - 6 2026-07-05
ACA815 Air Canada 6 2026-06-22
ACA851 Air Canada 5 2026-05-23
ACA809 Air Canada 5 2026-05-22
ACA802 Air Canada 5 2026-06-14
ACA306 Air Canada 5 2026-05-26
ACA301 Air Canada 5 2026-05-26
ACA867 - 4 2026-07-07
ACA856 Air Canada 4 2026-05-23
ACA837 Air Canada 4 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ACA907 - Jul 13, 13:35 UTCJul 13, 22:30 UTC8h 55m
2026-07-13 ACA906 YYZ → FCO Jul 13, 02:58 UTCJul 13, 11:07 UTC8h 9m
2026-07-13 ACA906 - Jul 13, 03:01 UTCJul 13, 11:10 UTC8h 10m
2026-07-12 ACA825 - Jul 12, 12:05 UTCJul 12, 19:50 UTC7h 45m
2026-07-12 ACA824 - Jul 12, 00:40 UTCJul 12, 02:40 UTC2h 0m
2026-07-12 ACA824 YYZ → MAD Jul 12, 00:37 UTCJul 12, 07:23 UTC6h 46m
2026-07-11 ACA935 - Jul 11, 12:05 UTCJul 11, 19:15 UTC7h 10m
2026-07-11 ACA935 - Jul 11, 10:55 UTCJul 11, 12:00 UTC1h 5m
2026-07-11 ACA934 YYZ → PRG Jul 11, 01:05 UTCJul 11, 08:35 UTC7h 30m
2026-07-10 ACA2396 YUL → YYZ Jul 10, 21:05 UTCJul 10, 22:00 UTC55m
2026-07-10 ACA813 LIS → YUL Jul 10, 10:50 UTCJul 10, 17:35 UTC6h 45m
2026-07-10 ACA812 YUL → LIS Jul 10, 02:30 UTCJul 10, 08:14 UTC5h 44m
2026-07-10 ACA812 YUL → LIS Jul 10, 02:35 UTCJul 10, 08:25 UTC5h 50m
2026-07-09 ACA1403 - Jul 9, 18:55 UTCJul 9, 22:35 UTC3h 40m
2026-07-09 ACA1400 YUL → CUN Jul 9, 13:10 UTCJul 9, 17:00 UTC3h 50m
2026-07-08 ACA7055 - Jul 8, 14:25 UTCJul 8, 21:40 UTC7h 15m
2026-07-08 ACA804 YUL → CPH Jul 8, 00:30 UTCJul 8, 07:20 UTC6h 50m
2026-07-07 ACA867 - Jul 7, 09:05 UTCJul 7, 15:40 UTC6h 35m
2026-07-06 ACA888 - Jul 6, 23:25 UTCJul 7, 05:50 UTC6h 25m
2026-07-06 ACA889 - Jul 6, 08:50 UTCJul 6, 15:50 UTC7h 0m
2026-07-05 ACA866 YUL → LHR Jul 5, 23:20 UTCJul 6, 05:20 UTC6h 0m
2026-07-05 ACA895 - Jul 5, 10:40 UTCJul 5, 18:30 UTC7h 50m
2026-07-05 ACA894 YUL → MXP Jul 5, 00:55 UTCJul 5, 07:35 UTC6h 40m
2026-07-04 ACA894 - Jul 4, 22:25 UTCJul 4, 22:35 UTC10m
2026-07-04 ACA894 YYZ → YUL Jul 4, 21:36 UTCJul 4, 22:10 UTC34m
2026-07-04 ACA841 FRA → YYZ Jul 4, 08:25 UTCJul 4, 16:45 UTC8h 20m
2026-07-04 ACA841 FRA → YYZ Jul 4, 08:23 UTCJul 4, 16:46 UTC8h 23m
2026-07-03 ACA840 YYZ → FRA Jul 3, 21:00 UTCJul 4, 04:00 UTC7h 0m
2026-07-03 ACA837 MUC → YYZ Jul 3, 10:00 UTCJul 3, 18:30 UTC8h 30m
2026-07-03 ACA837 MUC → YYZ Jul 3, 09:59 UTCJul 3, 18:19 UTC8h 20m
2026-07-02 ACA836 YYZ → MUC Jul 2, 22:05 UTCJul 3, 05:25 UTC7h 20m
2026-07-02 ACA825 MAD → YYZ Jul 2, 12:05 UTCJul 2, 19:55 UTC7h 50m
2026-07-02 ACA824 - Jul 2, 01:20 UTCJul 2, 08:25 UTC7h 5m
2026-07-01 ACA891 - Jul 1, 10:45 UTCJul 1, 20:10 UTC9h 25m
2026-07-01 ACA891 FCO → YYZ Jul 1, 10:41 UTCJul 1, 20:03 UTC9h 22m
2026-07-01 ACA890 - Jul 1, 00:40 UTCJul 1, 08:40 UTC8h 0m
2026-06-30 ACA895 YUL → YYZ Jun 30, 20:55 UTCJun 30, 21:45 UTC50m
2026-06-30 ACA895 YUL → YYZ Jun 30, 20:54 UTCJun 30, 21:34 UTC40m
2026-06-29 ACA835 MAD → YUL Jun 29, 11:14 UTCJun 29, 18:44 UTC7h 30m
2026-06-29 ACA835 MAD → YUL Jun 29, 11:12 UTCJun 29, 18:26 UTC7h 14m
2026-06-29 ACA824 YYZ → MAD Jun 29, 00:20 UTCJun 29, 06:54 UTC6h 35m
2026-06-27 ACA489 YUL → YYZ Jun 27, 22:49 UTCJun 27, 23:45 UTC55m
2026-06-27 ACA489 YUL → YYZ Jun 27, 22:46 UTCJun 27, 23:37 UTC51m
2026-06-27 ACA819 VCE → YUL Jun 27, 10:40 UTCJun 27, 18:29 UTC7h 50m
2026-06-26 ACA816 YYZ → VCE Jun 26, 23:25 UTCJun 27, 07:10 UTC7h 45m
2026-06-26 ACA829 CPH → YYZ Jun 26, 11:40 UTCJun 26, 19:35 UTC7h 55m
2026-06-26 ACA828 - Jun 26, 06:50 UTCJun 26, 08:24 UTC1h 35m
2026-06-26 ACA828 - Jun 26, 02:50 UTCJun 26, 02:54 UTC5m
2026-06-26 ACA828 - Jun 26, 01:20 UTCJun 26, 02:44 UTC1h 25m
2026-06-25 ACA837 MUC → YYZ Jun 25, 13:55 UTCJun 25, 21:59 UTC8h 5m

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

Mode-S C051E4 frequently asked

What is Mode-S code C051E4?
C051E4 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-GFAH.
Where is Mode-S C051E4 registered?
Mode-S code C051E4 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C051E4 broadcasting right now?
Yes. Mode-S C051E4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C051E4, octal 60050744, decimal 12,603,876.
What flights does C051E4 operate?
Mode-S C051E4 has broadcast 20 distinct callsigns, including ACA813, ACA895, ACA865, ACA894, ACA864.