Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

C03F85

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-FYBK · BOEING 737-800 · operated by Westjet

Hex
C03F85
Octal
60037605
Decimal
12,599,173
Country
CA
Tail
C-FYBK
Type
B738
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
155
Distinct callsigns
20
Country
CA
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S C03F85.

Country allocation

The ICAO 24-bit address C03F85 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
WJA558 WestJet 5 2026-07-24
WJA105 - 5 2026-07-11
WJA349 WestJet 4 2026-06-22
WJA8998 WestJet 3 2026-06-06
WJA813 WestJet 3 2026-04-15
WJA812 WestJet 3 2026-04-14
WJA632 WestJet 3 2026-06-30
WJA588 - 3 2026-07-02
WJA560 - 3 2026-04-13
WJA347 - 3 2026-07-14
WJA345 - 3 2026-07-13
WJA108 - 3 2026-06-25
WJA650 - 2 2026-07-15
WJA647 WestJet 2 2026-04-13
WJA641 WestJet 2 2026-06-11
WJA635 - 2 2026-07-12
WJA627 - 2 2026-07-14
WJA626 WestJet 2 2026-06-16
WJA610 - 2 2026-07-22
WJA567 WestJet 2 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 WJA1024 YYC → LAX Jul 26, 21:00 UTCJul 26, 21:15 UTC15m
2026-07-26 WJA110 YVR → YYC Jul 26, 17:50 UTCJul 26, 18:50 UTC1h 0m
2026-07-26 WJA107 YYC → YVR Jul 26, 14:45 UTCJul 26, 15:55 UTC1h 10m
2026-07-25 WJA190 YLW → YEG Jul 25, 22:25 UTCJul 25, 23:10 UTC45m
2026-07-25 WJA187 YYC → YLW Jul 25, 20:20 UTCJul 25, 21:10 UTC50m
2026-07-25 WJA187 YYC → YLW Jul 25, 20:19 UTCJul 26, 16:05 UTC19h 47m
2026-07-25 WJA518 YQQ → YYC Jul 25, 17:50 UTCJul 25, 19:00 UTC1h 10m
2026-07-24 WJA567 YKF → YYC Jul 24, 21:57 UTCJul 25, 21:10 UTC23h 13m
2026-07-24 WJA558 YEG → YXE Jul 24, 16:35 UTCJul 24, 20:00 UTC3h 25m
2026-07-24 WJA558 YEG → YXE Jul 24, 16:31 UTCJul 25, 15:15 UTC22h 44m
2026-07-23 WJA552 YVR → YLW Jul 23, 19:52 UTCJul 24, 19:15 UTC23h 23m
2026-07-23 WJA619 YYG → YEG Jul 23, 00:20 UTCJul 23, 21:05 UTC20h 45m
2026-07-22 WJA610 YYC → YOW Jul 22, 19:43 UTCJul 23, 17:15 UTC21h 32m
2026-07-22 WJA610 YYC → YOW Jul 22, 19:45 UTCJul 22, 23:05 UTC3h 20m
2026-07-22 WJA633 YYZ → YYC Jul 22, 13:10 UTCJul 22, 17:05 UTC3h 55m
2026-07-21 WJA2567 MBJ → YYZ Jul 21, 13:00 UTCJul 21, 22:45 UTC9h 45m
2026-07-20 WJA642 YYC → YYZ Jul 20, 19:30 UTCJul 20, 22:35 UTC3h 5m
2026-07-20 WJA104 YVR → YYC Jul 20, 14:35 UTCJul 20, 15:35 UTC1h 0m
2026-07-20 WJA321 YQR → YEG Jul 20, 04:30 UTCJul 20, 05:50 UTC1h 20m
2026-07-19 WJA463 YYC → YYJ Jul 19, 21:45 UTCJul 20, 01:35 UTC3h 50m
2026-07-19 WJA444 - Jul 19, 16:05 UTCJul 19, 19:15 UTC3h 10m
2026-07-18 WJA1111 FLL → YYZ Jul 18, 21:50 UTCJul 19, 00:30 UTC2h 40m
2026-07-18 WJA1111 FLL → YYZ Jul 18, 21:50 UTCJul 19, 19:30 UTC21h 41m
2026-07-18 WJA1110 YYZ → FLL Jul 18, 17:50 UTCJul 18, 20:40 UTC2h 50m
2026-07-17 WJA2700 YYZ → YYZ Jul 17, 14:20 UTCJul 18, 00:15 UTC9h 55m
2026-07-17 WJA893 - Jul 17, 11:10 UTCJul 17, 11:55 UTC45m
2026-07-17 WJA892 - Jul 17, 03:34 UTCJul 17, 04:14 UTC40m
2026-07-16 WJA811 YHZ → YYZ Jul 16, 23:40 UTCJul 17, 01:45 UTC2h 5m
2026-07-16 WJA808 - Jul 16, 20:39 UTCJul 16, 22:10 UTC1h 30m
2026-07-16 WJA444 - Jul 16, 15:49 UTCJul 16, 18:55 UTC3h 5m
2026-07-16 WJA437 - Jul 16, 10:29 UTCJul 16, 14:20 UTC3h 50m
2026-07-15 WJA2129 CUN → YYZ Jul 15, 18:40 UTCJul 15, 22:10 UTC3h 30m
2026-07-15 WJA2128 YYZ → CUN Jul 15, 13:35 UTCJul 15, 17:00 UTC3h 25m
2026-07-15 WJA650 YYC → YYZ Jul 15, 00:40 UTCJul 15, 03:55 UTC3h 15m
2026-07-14 WJA347 - Jul 14, 17:35 UTCJul 14, 18:30 UTC55m
2026-07-14 WJA342 YYC → YXE Jul 14, 15:35 UTCJul 14, 16:20 UTC45m
2026-07-14 WJA627 YYZ → YYC Jul 14, 10:10 UTCJul 14, 14:00 UTC3h 50m
2026-07-14 WJA650 YYC → YYZ Jul 14, 00:25 UTCJul 14, 03:35 UTC3h 10m
2026-07-13 WJA397 - Jul 13, 18:10 UTCJul 13, 19:15 UTC1h 5m
2026-07-13 WJA392 - Jul 13, 15:35 UTCJul 13, 16:20 UTC45m
2026-07-13 WJA345 - Jul 13, 13:00 UTCJul 13, 13:55 UTC55m
2026-07-12 WJA635 YYZ → YYC Jul 12, 14:27 UTCJul 13, 13:15 UTC22h 49m
2026-07-12 WJA635 - Jul 12, 14:30 UTCJul 12, 18:15 UTC3h 45m
2026-07-11 WJA384 YWG → YYZ Jul 11, 21:35 UTCJul 11, 23:35 UTC2h 0m
2026-07-11 WJA538 YVR → YWG Jul 11, 17:00 UTCJul 11, 19:15 UTC2h 15m
2026-07-11 WJA105 YYC → YVR Jul 11, 13:35 UTCJul 11, 14:45 UTC1h 10m
2026-07-11 WJA585 - Jul 11, 00:35 UTCJul 11, 04:25 UTC3h 50m
2026-07-10 WJA582 - Jul 10, 20:10 UTCJul 10, 23:20 UTC3h 10m
2026-07-10 WJA347 YXE → YYC Jul 10, 17:40 UTCJul 10, 18:35 UTC55m
2026-07-10 WJA342 YYC → YXE Jul 10, 15:35 UTCJul 10, 16:20 UTC45m

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

Mode-S C03F85 frequently asked

What is Mode-S code C03F85?
C03F85 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FYBK.
Where is Mode-S C03F85 registered?
Mode-S code C03F85 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C03F85 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C03F85, octal 60037605, decimal 12,599,173.
What flights does C03F85 operate?
Mode-S C03F85 has broadcast 20 distinct callsigns, including WJA558, WJA105, WJA349, WJA8998, WJA813.