Apparatus

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sensors Mode-S transponder

C04FF4

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-GEHF · BOEING 737 MAX 8 · operated by Westjet

Hex
C04FF4
Octal
60047764
Decimal
12,603,380
Country
CA
Tail
C-GEHF
Type
B38M
No current signal · last broadcast 50m ago
Flights observed
227
Distinct callsigns
20
Country
CA
Last broadcast
50m ago

Last known position

Most recent position reported by Mode-S C04FF4.

Country allocation

The ICAO 24-bit address C04FF4 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
WJA780 - 7 2026-07-09
WJA41 - 6 2026-07-12
WJA234 WestJet 6 2026-06-17
WJA762 WestJet 5 2026-06-01
WJA636 - 5 2026-07-09
WJA539 - 5 2026-06-18
WJA51 - 5 2026-07-10
WJA781 WestJet 4 2026-07-08
WJA714 WestJet 4 2026-05-11
WJA711 WestJet 4 2026-04-16
WJA651 - 4 2026-07-10
WJA642 - 4 2026-07-01
WJA800 WestJet 3 2026-05-12
WJA761 WestJet 3 2026-05-24
WJA704 WestJet 3 2026-04-14
WJA686 WestJet 3 2026-05-18
WJA667 WestJet 3 2026-04-15
WJA60 - 3 2026-07-14
WJA591 WestJet 3 2026-05-23
WJA553 WestJet 3 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 WJA60 - Jul 14, 01:25 UTCJul 14, 02:35 UTC1h 10m
2026-07-13 WJA1591 ATL → YYC Jul 13, 19:35 UTCJul 13, 23:40 UTC4h 5m
2026-07-13 WJA1590 YYC → ATL Jul 13, 13:25 UTCJul 13, 17:15 UTC3h 50m
2026-07-12 WJA41 LGW → YHZ Jul 12, 10:29 UTCJul 13, 02:25 UTC15h 57m
2026-07-12 WJA40 YHZ → LGW Jul 12, 02:42 UTCJul 13, 00:55 UTC22h 14m
2026-07-11 WJA590 YWG → YHZ Jul 11, 21:15 UTCJul 12, 21:00 UTC23h 46m
2026-07-11 WJA687 YOW → YWG Jul 11, 16:29 UTCJul 12, 11:45 UTC19h 17m
2026-07-10 WJA651 YYZ → YYC Jul 10, 22:50 UTCJul 11, 19:05 UTC20h 16m
2026-07-10 WJA51 LGW → YYT Jul 10, 10:10 UTCJul 11, 05:50 UTC19h 41m
2026-07-10 WJA51 - Jul 10, 10:10 UTCJul 10, 11:00 UTC50m
2026-07-09 WJA780 YYZ → LGW Jul 9, 22:35 UTCJul 10, 08:20 UTC9h 45m
2026-07-09 WJA636 YYC → YYZ Jul 9, 17:30 UTCJul 9, 20:50 UTC3h 20m
2026-07-08 WJA651 YYZ → YYC Jul 8, 22:50 UTCJul 9, 02:35 UTC3h 45m
2026-07-08 WJA781 YYT → YYZ Jul 8, 10:30 UTCJul 8, 20:30 UTC10h 0m
2026-07-07 WJA780 YYZ → LGW Jul 7, 22:45 UTCJul 8, 08:10 UTC9h 25m
2026-07-07 WJA37 EDI → YYZ Jul 7, 11:55 UTCJul 7, 18:50 UTC6h 55m
2026-07-07 WJA36 YYZ → EDI Jul 7, 03:40 UTCJul 7, 10:05 UTC6h 25m
2026-07-06 WJA454 YEG → YYZ Jul 6, 21:40 UTCJul 7, 01:15 UTC3h 35m
2026-07-06 WJA449 YYZ → YEG Jul 6, 16:25 UTCJul 6, 20:15 UTC3h 50m
2026-07-05 WJA386 YWG → YYZ Jul 5, 23:30 UTCJul 6, 01:25 UTC1h 55m
2026-07-05 WJA386 YWG → YYZ Jul 5, 23:29 UTCJul 6, 20:15 UTC20h 47m
2026-07-05 WJA385 YYZ → YWG Jul 5, 20:05 UTCJul 5, 22:20 UTC2h 15m
2026-07-05 WJA37 - Jul 5, 10:45 UTCJul 5, 17:40 UTC6h 55m
2026-07-05 WJA36 YYZ → EDI Jul 5, 02:35 UTCJul 5, 08:40 UTC6h 5m
2026-07-04 WJA2500 YYZ → YYZ Jul 4, 13:35 UTCJul 5, 00:35 UTC11h 0m
2026-07-04 WJA460 - Jul 4, 00:25 UTCJul 4, 03:50 UTC3h 25m
2026-07-03 WJA455 YYZ → YEG Jul 3, 18:50 UTCJul 3, 22:35 UTC3h 45m
2026-07-03 WJA47 DUB → YYZ Jul 3, 09:55 UTCJul 3, 17:10 UTC7h 15m
2026-07-03 WJA46 YYZ → DUB Jul 3, 02:00 UTCJul 3, 08:00 UTC6h 0m
2026-07-02 WJA93 CWL → YYZ Jul 2, 10:55 UTCJul 2, 18:35 UTC7h 40m
2026-07-02 WJA92 - Jul 2, 03:50 UTCJul 2, 08:35 UTC4h 45m
2026-07-02 WJA92 - Jul 2, 02:25 UTCJul 2, 03:45 UTC1h 20m
2026-07-01 WJA642 YYC → YYZ Jul 1, 19:10 UTCJul 1, 23:00 UTC3h 50m
2026-07-01 WJA629 YYZ → YYC Jul 1, 12:10 UTCJul 1, 15:50 UTC3h 40m
2026-07-01 WJA622 YYC → YYZ Jul 1, 07:20 UTCJul 1, 10:40 UTC3h 20m
2026-07-01 WJA235 - Jul 1, 02:15 UTCJul 1, 03:55 UTC1h 40m
2026-06-30 WJA232 YYC → YWG Jun 30, 23:25 UTCJul 1, 01:05 UTC1h 40m
2026-06-30 WJA266 - Jun 30, 17:50 UTCJun 30, 18:55 UTC1h 5m
2026-06-30 WJA263 - Jun 30, 15:30 UTCJun 30, 16:35 UTC1h 5m
2026-06-29 WJA763 YYC → YYC Jun 29, 15:54 UTCJun 30, 05:00 UTC13h 6m
2026-06-24 WJA107 YYC → YVR Jun 24, 14:33 UTCJun 24, 23:59 UTC9h 27m
2026-06-23 WJA384 YWG → YYZ Jun 23, 21:45 UTCJun 23, 23:44 UTC2h 0m
2026-06-23 WJA384 YWG → YYZ Jun 23, 21:43 UTCJun 24, 21:00 UTC23h 17m
2026-06-23 WJA538 - Jun 23, 17:30 UTCJun 23, 19:55 UTC2h 25m
2026-06-23 WJA1851 - Jun 23, 01:59 UTCJun 23, 14:25 UTC12h 25m
2026-06-22 WJA713 YYZ → YVR Jun 22, 14:10 UTCJun 22, 18:44 UTC4h 35m
2026-06-21 WJA385 YYZ → YWG Jun 21, 19:59 UTCJun 22, 18:54 UTC22h 56m
2026-06-20 WJA2561 KIN → YYZ Jun 20, 20:47 UTCJun 21, 16:59 UTC20h 13m
2026-06-20 WJA801 YHZ → YYZ Jun 20, 11:48 UTCJun 21, 09:20 UTC21h 32m
2026-06-19 WJA576 - Jun 19, 19:45 UTCJun 20, 00:09 UTC4h 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-GEHF page for operator, model, and routing details .

Mode-S C04FF4 frequently asked

What is Mode-S code C04FF4?
C04FF4 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-GEHF.
Where is Mode-S C04FF4 registered?
Mode-S code C04FF4 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C04FF4 broadcasting right now?
No active broadcast right now. Last signal was 50m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C04FF4, octal 60047764, decimal 12,603,380.
What flights does C04FF4 operate?
Mode-S C04FF4 has broadcast 20 distinct callsigns, including WJA780, WJA41, WJA234, WJA762, WJA636.